VXI VM2601, VM2602 User Manual
Mainos
Mainos
VM2601
80 MSa/
S
, 14-
BIT
D
IGITIZER
/IF R
ECEIVER
VM2602
40 MSa/
S
, 14-
BIT
D
IGITIZER
VM2603
20 MSa/
S
, 14-
BIT
D
IGITIZER
U
SER
’
S
M
ANUAL
P/N: 82-0063-000
Released September 14, 2006
VXI Technology, Inc.
2031 Main Street
Irvine, CA 92614-6509
(949) 955-1894 bus
2
VXI Technology, Inc.
www.vxitech.com
T
ABLE OF
C
ONTENTS
I NTRODUCTION
T ABLE OF C ONTENTS ................................................................................................................................................3
Certification ........................................................................................................................................................7
Warranty .............................................................................................................................................................7
Limitation of Warranty .......................................................................................................................................7
Restricted Rights Legend....................................................................................................................................7
D ECLARATION OF C ONFORMITY ...............................................................................................................................7
G ENERAL S AFETY I NSTRUCTIONS .............................................................................................................................8
Terms and Symbols ............................................................................................................................................8
Warnings.............................................................................................................................................................8
S UPPORT R ESOURCES ..............................................................................................................................................10
S ECTION 1 ...................................................................................................................................................................11
I NTRODUCTION .......................................................................................................................................................11
Overview...........................................................................................................................................................11
Data Acquisition ...............................................................................................................................................13
Programming and Data Access .........................................................................................................................13
Calibration ........................................................................................................................................................13
Front Panel Connectors.....................................................................................................................................14
S ECTION 2 ...................................................................................................................................................................19
P REPARATION FOR U SE ...........................................................................................................................................19
Installation ........................................................................................................................................................19
Calculating System Power and Cooling Requirements.....................................................................................19
Setting the Chassis Backplane Jumpers ............................................................................................................20
Setting the Logical Address ..............................................................................................................................20
S ECTION 3 ...................................................................................................................................................................21
P ROGRAMMING .......................................................................................................................................................21
Introduction.......................................................................................................................................................21
Notation ............................................................................................................................................................22
A PPLICATION E XAMPLES ........................................................................................................................................23
SCPI Programming Example............................................................................................................................23
Register Access Example..................................................................................................................................24
VXI plug&play Driver Example........................................................................................................................26
S ECTION 4 ...................................................................................................................................................................29
C OMMAND D ICTIONARY .........................................................................................................................................29
Introduction.......................................................................................................................................................29
Alphabetical Command Listing ........................................................................................................................29
Command Dictionary........................................................................................................................................37
C OMMON SCPI C OMMANDS ...................................................................................................................................38
*CLS.................................................................................................................................................................38
*ESE .................................................................................................................................................................39
*ESR? ...............................................................................................................................................................40
*IDN? ...............................................................................................................................................................41
*OPC.................................................................................................................................................................42
*RST.................................................................................................................................................................43
*SRE.................................................................................................................................................................44
*STB? ...............................................................................................................................................................45
VM2601/2/3 Preface 3
VXI Technology, Inc.
*TRG ................................................................................................................................................................46
*TST? ...............................................................................................................................................................47
*WAI ................................................................................................................................................................48
I NSTRUMENT S PECIFIC SCPI C OMMANDS ...............................................................................................................49
ABORt ..............................................................................................................................................................49
ARM:AUTO .....................................................................................................................................................50
ARM[:IMMediate]............................................................................................................................................51
ARM:LEVel......................................................................................................................................................52
ARM:SLOPe.....................................................................................................................................................53
ARM:SOURce ..................................................................................................................................................54
CALCulate:FALL:TIMe...................................................................................................................................55
CALCulate:FREQuency? .................................................................................................................................56
CALCulate:NDUTy? ........................................................................................................................................57
CALCulate:NWIDth? .......................................................................................................................................58
CALCulate:PDUTy?.........................................................................................................................................59
CALCulate:PERCent:NOVershoot?.................................................................................................................60
CALCulate:PERCent:NPReshoot? ...................................................................................................................61
CALCulate:PERCent:NRINging? ....................................................................................................................62
CALCulate:PERCent:POVershoot?..................................................................................................................63
CALCulate:PERCent:PPReshoot?....................................................................................................................64
CALCulate:PERCent:PRINging? .....................................................................................................................65
CALCulate:PERiod?.........................................................................................................................................66
CALCulate:PWIDth?........................................................................................................................................67
CALCulate:RISE:TIMe? ..................................................................................................................................68
CALCulate:VOLTage:AMPLitude?.................................................................................................................69
CALCulate:VOLTage:HIGH? ..........................................................................................................................70
CALCulate:VOLTage:LOW?...........................................................................................................................71
CALCulate:VOLTage:MAXimum? .................................................................................................................72
CALCulate:VOLTage:MEAN? ........................................................................................................................73
CALCulate:VOLTage:MINimum?...................................................................................................................74
CALCulate:VOLTage:NOVershoot?................................................................................................................75
CALCulate:VOLTage:NPReshoot?..................................................................................................................76
CALCulate:VOLTage:NRINging? ...................................................................................................................77
CALCulate:VOLTage:POVershoot? ................................................................................................................78
CALCulate:VOLTage:PPReshoot? ..................................................................................................................79
CALCulate:VOLTage:PRINging?....................................................................................................................80
CALCulate:VOLTage:PTPeak?........................................................................................................................81
CALCulate:VOLTage:RMS? ...........................................................................................................................82
CALibration:ADC:GAIN .................................................................................................................................83
CALibration:ADC:OFFSet ...............................................................................................................................84
CALibration:COUNt?.......................................................................................................................................85
CALibration:DAC:GAIN .................................................................................................................................86
CALibration:DAC:OFFSet ...............................................................................................................................87
CALibration:DEFault .......................................................................................................................................88
CALibration:RESet...........................................................................................................................................89
CALibration:SECure:CODE.............................................................................................................................90
CALibration:SECure[:STATe] .........................................................................................................................91
CALibration:STORe.........................................................................................................................................92
COMBine:FEED...............................................................................................................................................93
CONFigure?......................................................................................................................................................94
CONFigure:ADC ..............................................................................................................................................95
CONFigure:FALL:TIMe ..................................................................................................................................96
CONFigure:FREQuency...................................................................................................................................97
CONFigure:HORizontal:RESolution................................................................................................................98
CONFigure:NDUTy .........................................................................................................................................99
4 VM2601/2/3 Preface
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CONFigure:NWIDth ......................................................................................................................................100
CONFigure:PDUTy ........................................................................................................................................101
CONFigure:PERCent:NOVershoot ................................................................................................................102
CONFigure:PERCent:NPReshoot ..................................................................................................................103
CONFigure:PERCent:NRINging....................................................................................................................104
CONFigure:PERCent:POVershoot.................................................................................................................105
CONFigure:PERCent:PPReshoot ...................................................................................................................106
CONFigure:PERCent:PRINging ....................................................................................................................107
CONFigure:PERiod ........................................................................................................................................108
CONFigure:PWIDth .......................................................................................................................................109
CONFigure:RISE:TIMe..................................................................................................................................110
CONFigure:SAR:TIMe...................................................................................................................................111
CONFigure:SAR:TIMe?.................................................................................................................................112
CONFigure:VOLTage:AMPLitude ................................................................................................................113
CONFigure:VOLTage:HIGH .........................................................................................................................114
CONFigure:VOLTage:LOW ..........................................................................................................................115
CONFigure:VOLTage:MAXimum.................................................................................................................116
CONFigure:VOLTage:MEAN........................................................................................................................117
CONFigure:VOLTage:MINimum ..................................................................................................................118
CONFigure:VOLTage:NOVershoot...............................................................................................................119
CONFigure:VOLTage:NPReshoot .................................................................................................................120
CONFigure:VOLTage:NRINging ..................................................................................................................121
CONFigure:VOLTage:POVershoot................................................................................................................122
CONFigure:VOLTage:PPReshoot..................................................................................................................123
CONFigure:VOLTage:PRINging ...................................................................................................................124
CONFigure:VOLTage:PTPeak.......................................................................................................................125
CONFigure:VOLTage:RMS...........................................................................................................................126
CONTrol:IPOWer?.........................................................................................................................................127
FETCh?...........................................................................................................................................................128
INITiate:DELay ..............................................................................................................................................129
INITiate[:IMMediate] .....................................................................................................................................130
INPut:COUPling.............................................................................................................................................131
INPut:FILTer:FREQuency .............................................................................................................................132
INPut:FILTer:STATe .....................................................................................................................................133
INPut:IMPedance............................................................................................................................................134
INPut:OFFSet .................................................................................................................................................135
INPut:RANGe.................................................................................................................................................136
INPut:SOURce................................................................................................................................................137
MEASure:FALL:TIMe? .................................................................................................................................138
MEASure:FREQuency?..................................................................................................................................139
MEASure:NDUTy? ........................................................................................................................................140
MEASure:NWIDth? .......................................................................................................................................141
MEASure:PDUTy? .........................................................................................................................................142
MEASure:PERCent:NOVershoot? .................................................................................................................143
MEASure:PERCent:NPReshoot? ...................................................................................................................144
MEASure:PERCent:NRINging?.....................................................................................................................145
MEASure:PERCent:POVershoot?..................................................................................................................146
MEASure:PERCent:PPReshoot? ....................................................................................................................147
MEASure:PERCent:PRINging? .....................................................................................................................148
MEASure:PERiod?.........................................................................................................................................149
MEASure:PWIDth? ........................................................................................................................................150
MEASure:RISE:TIMe?...................................................................................................................................151
MEASure:VOLTage:AMPLitude? .................................................................................................................152
MEASure:VOLTage:HIGH? ..........................................................................................................................153
MEASure:VOLTage:LOW? ...........................................................................................................................154
VM2601/2/3 Preface 5
VXI Technology, Inc.
MEASure:VOLTage:MAXimum?..................................................................................................................155
MEASure:VOLTage:MEAN? ........................................................................................................................156
MEASure:VOLTage:MINimum? ...................................................................................................................157
MEASure:VOLTage:NOVershoot?................................................................................................................158
MEASure:VOLTage:NPReshoot? ..................................................................................................................159
MEASure:VOLTage:NRINging? ...................................................................................................................160
MEASure:VOLTage:POVershoot? ................................................................................................................161
MEASure:VOLTage:PPReshoot?...................................................................................................................162
MEASure:VOLTage:PRINging? ....................................................................................................................163
MEASure:VOLTage:PTPeak?........................................................................................................................164
MEASure:VOLTage:RMS?............................................................................................................................165
READ?............................................................................................................................................................166
ROSCillator:FREQuency................................................................................................................................167
ROSCillator:SOURce .....................................................................................................................................168
SAMPle:CLOCk:FREQuency ........................................................................................................................169
SAMPle:CLOCk:SOURce..............................................................................................................................170
SWEep:COUNt...............................................................................................................................................171
SWEep:POINts ...............................................................................................................................................172
SWEep:TINTerval ..........................................................................................................................................173
SYNChronize:MODE.....................................................................................................................................174
SYNChronize:STATe.....................................................................................................................................175
TRIGger[:IMMediate] ....................................................................................................................................176
TRIGger:LEVel ..............................................................................................................................................177
TRIGger:SLOPe .............................................................................................................................................178
TRIGger:SOURce...........................................................................................................................................179
TRIGger:STATe? ...........................................................................................................................................180
R EQUIRED SCPI C OMMANDS ................................................................................................................................181
STATus:OPERation:CONDition? ..................................................................................................................181
STATus:OPERation:ENABle.........................................................................................................................182
STATus:OPERation[:EVENt]? ......................................................................................................................183
STATus:PRESet .............................................................................................................................................184
STATus:QUEStionable:CONDition? .............................................................................................................185
STATus:QUEStionable:ENABle....................................................................................................................186
STATus:QUEStionable[:EVENt]? .................................................................................................................187
SYSTem:ERRor?............................................................................................................................................188
SYSTem:VERSion?........................................................................................................................................189
E RROR M ESSAGES ................................................................................................................................................190
A PPENDIX A ..............................................................................................................................................................193
N OISE S PECIFICATION ...........................................................................................................................................193
How RMS Noise is Calculated .......................................................................................................................193
I NDEX ........................................................................................................................................................................195
6 VM2601/2/3 Preface
www.vxitech.com
C ERTIFICATION
VXI Technology, Inc. certifies that this product met its published specifications at the time of shipment from the factory. VTI further certifies that its calibration measurements are traceable to the United States National Institute of
Standards and Technology (formerly National Bureau of Standards), to the extent allowed by that organization’s calibration facility and to the calibration facilities of other International Standards Organization members.
W ARRANTY
The product referred to herein is warranted against defects in material and workmanship for a period of three years from the receipt date of the product at customer’s facility. The sole and exclusive remedy for breach of any warranty concerning these goods shall be repair or replacement of defective parts or a refund of the purchase price, to be determined at the option of VTI.
For warranty service or repair, this product must be returned to a VXI Technology authorized service center. The product shall be shipped prepaid to VTI and VTI shall prepay all returns of the product to the buyer. However, the buyer shall pay all shipping charges, duties, and taxes for products returned to VTI from another country.
VTI warrants that its software and firmware designated by VTI for use with a product will execute its programming when properly installed on that product. VTI does not however warrant that the operation of the product or software or firmware will be uninterrupted or error free.
L IMITATION OF W ARRANTY
The warranty shall not apply to defects resulting from improper or inadequate maintenance by the buyer, buyersupplied products or interfacing, unauthorized modification or misuse, operation outside the environmental specifications for the product or improper site preparation or maintenance.
VXI Technology, Inc. shall not be liable for injury to property other than the goods themselves. Other than the limited warranty stated above, VXI Technology, Inc. makes no other warranties, express, or implied, with respect to the quality of product beyond the description of the goods on the face of the contract. VTI specifically disclaims the implied warranties of merchantability and fitness for a particular purpose.
R
ESTRICTED
R
IGHTS
L
EGEND
Use, duplication or disclosure by the Government is subject to restrictions as set forth in subdivision (b)(3)(ii) of the
Rights in Technical Data and Computer Software clause in DFARS 252.227-7013.
VXI Technology, Inc.
2031 Main Street
Irvine, CA 92614-6509 U.S.A.
VM2601/2/3 Preface 7
www.vxitech.com
D E C L A R A T I O N O F C O N F O R M I T Y
Declaration of Conformity According to ISO/IEC Guide 22 and EN 45014
M ANUFACTURER ’ S N AME
M ANUFACTURER ’ S A DDRESS
P RODUCT N AME
M ODEL N UMBER ( S )
P RODUCT O PTIONS
P RODUCT C ONFIGURATIONS
(
(
( VM2601) 80 MSa/s Digitizer & IF Receiver
VM2602) 40 MSa/s Digitizer
VM2603) 20 MSa/s Digitizer
VM2601/VM2602/VM2603
All
All
VXI Technology, Inc. declares that the aforementioned product conforms to the requirements of the Low Voltage Directive 73/23/EEC and the EMC Directive 89/366/EEC (inclusive 93/68/EEC ) and carries the “CE” mark accordingly. The product has been designed and manufactured according to the following specifications:
S AFETY
EMC
VXI Technology, Inc.
2031 Main Street
Irvine, California 92614-6509
EN61010 (2001)
EN61326 (1997 w/A1:98) Class A
CISPR 22 (1997) Class A
VCCI (April 2000) Class A
ICES-003 Class A (ANSI C63.4 1992)
AS/NZS 3548 (w/A1 & A2:97) Class A
FCC Part 15 Subpart B Class A
EN
The product was installed into a C-size VXI mainframe chassis and tested in a typical configuration.
I hereby declare that the aforementioned product has been designed to be in compliance with the relevant sections of the specifications listed above as well as complying with all essential requirements of the Low Voltage Directive.
September 2006
Steve Mauga, QA Manager
VM2601/2/3 Preface 7
VXI Technology, Inc.
G ENERAL S AFETY I NSTRUCTIONS
Review the following safety precautions to avoid bodily injury and/or damage to the product.
These precautions must be observed during all phases of operation or service of this product.
Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design, manufacture, and intended use of the product.
Service should only be performed by qualified personnel.
T ERMS AND S YMBOLS
These terms may appear in this manual:
WARNING Indicates that a procedure or condition may cause bodily injury or death.
CAUTION Indicates that a procedure or condition could possibly cause damage to equipment or loss of data.
These symbols may appear on the product:
ATTENTION - Important safety instructions
Frame or chassis ground
Indicates that the product was manufactured after August 13, 2005. This mark is placed in accordance with EN 50419, Marking of electrical and electronic equipment in accordance with Article 11(2) of Directive 2002/96/EC (WEEE) .
End-of-life product can be returned to VTI by obtaining an RMA number. Fees for take-back and recycling will apply if not prohibited by national law.
W
ARNINGS
Follow these precautions to avoid injury or damage to the product:
To avoid hazard, only use the power cord specified for this product. Use Proper Power Cord
Use Proper Power Source To avoid electrical overload, electric shock or fire hazard, do not use a power source that applies other than the specified voltage.
Use Proper Fuse To avoid fire hazard, only use the type and rating fuse specified for this product.
8 VM2601/2/3 Preface
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W ARNINGS (C ONT .)
Avoid Electric Shock
Ground the Product
Operating Conditions
Improper Use
To avoid electric shock or fire hazard, do not operate this product with the covers removed. Do not connect or disconnect any cable, probes, test leads, etc. while they are connected to a voltage source.
Remove all power and unplug unit before performing any service.
Service should only be performed by qualified personnel.
This product is grounded through the grounding conductor of the power cord. To avoid electric shock, the grounding conductor must be connected to earth ground.
To avoid injury, electric shock or fire hazard:
- Do not operate in wet or damp conditions.
- Do not operate in an explosive atmosphere.
- Operate or store only in specified temperature range.
- Provide proper clearance for product ventilation to prevent overheating.
- DO NOT operate if any damage to this product is suspected.
Product should be inspected or serviced only by qualified personnel.
The operator of this instrument is advised that if the equipment is used in a manner not specified in this manual, the protection provided by the equipment may be impaired.
Conformity is checked by inspection.
VM2601/2/3 Preface 9
10
VXI Technology, Inc.
S UPPORT R ESOURCES
Support resources for this product are available on the Internet and at VXI Technology customer support centers.
VXI Technology
World Headquarters
VXI Technology, Inc.
2031 Main Street
Irvine, CA 92614-6509
Phone: (949) 955-1894
Fax: (949) 955-3041
VXI Technology
Cleveland Instrument Division
VXI Technology, Inc.
7525 Granger Road, Unit 7
Valley View, OH 44125
Phone: (216) 447-8950
Fax: (216) 447-8951
VXI Technology
Lake Stevens Instrument Division
VXI Technology, Inc.
1924 - 203 Bickford
Snohomish, WA 98290
Phone: (425) 212-2285
Fax: (425) 212-2289
Technical Support
Phone: (949) 955-1894
Fax: (949) 955-3041
E-mail: [email protected]
Visit http://www.vxitech.com
for worldwide support sites and service plan information.
VM2601/2/3 Preface
www.vxitech.com
S ECTION 1
I
NTRODUCTION
O
VERVIEW
The VM2601, VM2602, and VM2603 (refered to as the VM260x) modules are high-resolution, high-speed digitizers. All three modules have Digital Storage Oscilloscope (DSO) functionality. In addition, the VM2601 also incorporates an Intermediate Frequency Receiver (IFR) function. This makes it ideal for applications in medical, automotive, semi-conductor, avionics, and communication test. The VM260x modules are a message-based device with a SCPI command set to simplify programming and configuration and register access to provide high-speed data throughput. Each module has either an 80 MSample/s (MSa/s) (VM2601), 40 MSa/s (VM2602), or 20 MSa/s (VM2603) ADC to support DSO applications. In addition, the DSO input can be routed to a 10 MSa/s ADC to support DC accurate low-frequency voltage measurements. A
16 MSa memory provides ample storage for even the most demanding test program. The DSO input features programmable impedance, ac, or dc coupling and a low-pass filter (LPF) with programmable corner frequencies.
This module is part of the VMIP™ family of instruments and can be combined with up to two other modules (e.g., 6.5 digit DMM, 50 MSa/s AWG, 1 ns counter/timer) to form a high-density
VXIbus instrument. Three VM2601/2/3s can be installed in a single-wide C-size module providing three independent 80/40/20 MSa/s digitzer channels.
VMIP
INSTRUMENT
MODULE #1
V
X
I
B
U
S
VMIP
INTERFACE
V
M
I
P
B
U
S
I
N
T
E
R
N
A
L
VMIP
INSTRUMENT
MODULE #2
VMIP
INSTRUMENT
MODULE #3
F IGURE 1-1: VMIP™ P LATFORM
VM2601/2/3 Introduction 11
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NOTE With the exception of sample rate and IF receiver capabilities, all three VM260x modules perform in the same manner. The VM2601 will be referenced thoughout the manual and, when exceptions exist, they will be noted.
D ATA A CQUISITION
The input data is acquired when a conversion trigger event occurs from one of the four following methods:
1. Trigger source from the front panel input : This input has a ±4 V input range and may be programmed to trigger on either the rising or falling edge of this signal and at specified voltage levels with 12-bit resolution and accurate to 1% of full scale.
2. Trigger source from the VXI TTL trigger bus : Any one of the eight TTL trigger bus lines may be selected as the trigger source. The unit may be programmed to trigger on either the rising or falling edge of this signal.
3. Trigger upon receipt of a word serial command : When this mode is selected, the ADC will convert when a word-serial command is received by the instrument.
4. Trigger from the input channel : The input channel can be selected to trigger the board. It can be programmed to trigger during a rising or falling edge and may also trigger at specified voltage levels with 12-bit resolution and accurate to 1% of full scale.
Memory can be segmented such that sequential trigger events can be stored without forcing the device to rearm via software or waiting for the previous samples to be offloaded. Both pre-trigger and post-trigger samples can be acquired in up to eight segments. When the instrument is configured for greater than eight segments, only post-trigger samples will be stored. The device can support up to 65,536 segments. Since three VM2601 modules can be accommodated on a single C-size VXIbus card, three differential channels can all be operating and triggering independently. For example, one can be acquiring data while another is waiting for a trigger.
P ROGRAMMING AND D ATA A CCESS
As is true with most complex VXI Technology instrumentation, the VM2601give the user the ability to access the device using the VXI message-based interface as well as utilizing direct register access for fast data throughput. The SCPI (message based) command set is used for instrument configuration, measurement configuration, and to query the results of the measurements. Register access is used to transfer the raw digitizer data from the instrument to the host. With modern host computers and interfaces, all 16 MSa can be transferred in just a few seconds. Measurements are configured and initiated by SCPI commands from the host.
Measurement data is output in response to a query from the host. This considerably reduces test program development and improves overall test times.
C ALIBRATION
The calibration constants used to correct the data values are stored in non-volatile memory. These constants are determined when the instrument is calibrated and can be set or queried by word serial command. This eliminates the need for removing covers from the unit and allows for automated calibration.
VM2601/2/3 Introduction 13
ACC/ERR FAIL
J105
J106
J107
J108
J109
J110
ACC/ERR FAIL
J111
J112
J113
J114
J115
J116
ACC/ERR FAIL
J117
J118
J119
J120
J121
J122
VXI Technology, Inc.
F RONT P ANEL C ONNECTORS
+ INPUT (J111)
Positive differential input for DSO channel (channel A+)
- INPUT (J112)
Negative differential input for DSO channel (channel A-)
IF INPUT (J113)
Single-ended IFR input (channel B)
NOTE This connector is covered on the VM2602 and VM2603 modules.
TRIGGER/GP0 INPUT (J114)
External Trigger Input/GP0 marker input
ARM/GP1 INPUT (J115)
External Arm Input/GP1 marker input
EXTERNAL CLOCK INPUT (J116)
External Sample Clock
Note : Front panel J designators vary with the type(s) of module(s) installed and with the instrument’s position in the VMIP carrier.
F IGURE 1-2: F RONT P ANEL L AYOUT
14 VM2601/2/3 Introduction
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S VD L_2 _L TT TTL _2 _ D S L V
VM2601/2/3 Introduction
F IGURE 1-3: VM260 X B LOCK D IAGRAM
15
VXI Technology, Inc.
G ENERAL
F EATURES
• Up to 80 MHz bandwidth for DSO (no filter) and 100 MHz for IFR (VM2601 only) – ideal for HF and IF frequencies
• Up to 80 MSa/s sample rate with pre and post trigger capability
• ±0.5 V, ±1.0 V, ±2 V, ±5.0 V, ±10.0 V, and ±20 V input ranges (DSO input)
• 50 Ω , 75 Ω , 150 Ω , or 1 M Ω input impedance, with ac or dc coupling (DSO input)
• Software selectable low-pass filter (DSO input)
• Built-in pulse parameter measurements
• Up to three independent channels per C-size card
• Auto re-arm capability for storing multiple waveforms with pre-trigger data
• Sleep mode reduces power consumption when not in use
• Dual channel synchronization for precise I/O
A NALOG I NPUT
C HANNELS
DSO
IFR (VM2601 only)
C ONNECTORS
VM2601
VM2602/3
R ESOLUTION
F ULL -S CALE I NPUT R ANGES
DSO input
IFR input
M AXIMUM S AMPLE R ATE (SR
MAX
DSO input
)
VM2601
VM2602
VM2603
IFR input (VM2601 only)
S AMPLE R ATE R ESOLUTION
1 Differential or Single-Ended (channels A+ and A-)
1 Single-Ended (channel B)
6 SMB Connectors
5 SMB Connectors
14 bits
±0.5 V, ±1.0 V and ±2.0 V; ±5.0 V, ±10 V, and ±20 V
±0.5 V
∗
80 MSa/s
40 MSa/s
20 MSa/s
80 MSa/s
(
SR
MAX n
)
, where n is an integer divider set by SAMPle:CLOCk:FREQuency
B ANDWIDTH
40 MHz, LPF On (VM2601)
20 MHz, LPF On (VM2601/2)
10 MHz, LPF On (VM2602/3)
5 MHz, LPF On (VM2603)
M EMORY
Standard (VM2601/2/3)
Option (VM2601/2/3)
M EMORY S EGMENTS
With pre-trigger data
Without pre-trigger data
S HARED M EMORY S PACE
I MPEDANCE
DSO input
IFR input
I NPUT C OUPLING
DSO input
IFR input
C APACITANCE
40 MHz
20 MHz
10 MHz
5 MHz
16 MSa
32 MSa
8 segments
64k segments
A32
50 Ω , 75 Ω , 150 Ω , or 1 M Ω
50 Ω ac/dc dc
40 pF maximum
∗
Note that the input voltage should not exceed 8 V dc or 8 V rms when the 50 Ω , 75 Ω , or 150 Ω input impedance is selected.
16 VM2601/2/3 Introduction
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A NALOG I NPUT (C ONTINUED )
C OMMON M ODE R EJECTION R ATIO (CMRR)
DC to 20 kHz @ ±0.5 V input range
All other input ranges up to SR
MAX
/2
O VERVOLTAGE P ROTECTION
≥ 60 dB
≥ 30 dB
Low ranges
High ranges
±5 V dc maximum
±50 V dc maximum
O FFSET A DJUSTMENT
±50% of full scale
DC A CCURACY
DSO FAST*
DSO SLOW*
IF (VM2601 only)
±1% of range
±0.5% of input, ±0.1% of range
±1% of range
* 50 Ω /75 Ω /150 Ω /1 M Ω impedance
AC A MPLITUDE A CCURACY
< 1 MHz
1 MHz to 20 MHz
20 MHz to 40 MHz
F REQUENCY F LATNESS
Low Input Ranges (All) dc to 5 MHz
5 MHz to 30 MHz
High Input Ranges dc to 5 MHz
5 MHz to 30 MHz
L OW PASS F ILTER
Filter Type
VM2601
VM2602
VM2603
I NTEGRAL N ON -L INEARITY
M ISSING C ODES
±0.1 dB
±0.5 dB
±2.5 dB
No filter, -1 dB (full scale) @ 50 Ω
±0.1 dB
±0.5 dB
No filter, -1 dB (full scale) @ 50 Ω
±0.5 dB
±1 dB
3-pole Bessel
None, 20 MHz, 40 MHz
None, 10 MHz, 20 MHz
None, 5 MHz, 10 MHz
±0.5 LSB typical
Guaranteed no missing codes
D YNAMIC C HARACTERISTICS
S IGNAL TO -N OISE PLUS D ISTORTION R ATIO (S/ [ N+D ] )*
0.5 V, 1.0 V & 2.0 V input ranges
5 V, 10 V & 20 V input ranges
69 dB typical, 63 dB minimum
65 dB typical, 60 dB minimum
* 20 Hz to 30 MHz, SR
MAX
low jitter clock
S PURIOUS F REE D YNAMIC R ANGE (SFDR)
0.5 V, 5.0 V input ranges*
1.0 V, 10 V input ranges*
2.0 V, 20 V input ranges*
0.5 V, 5.0 V input ranges**
1.0 V, 10 V input ranges**
2.0 V, 20 V input ranges**
> 77 dB typical, 75 dB minimum
> 80 dB typical, 77 dB minimum
> 80 dB typical, 75 dB minimum
> 77 dB typical, 75 dB minimum
> 77 dB typical, 75 dB minimum
> 77 dB typical, 75 dB minimum
IF input (excluding harmonics)
(VM2601 only)
> 80 dB typical, 75 dB minimum
* * 20 Hz to 1 MHz, 10 MSa/s, 20 MHz LPF on, FFT size = 16,384 (VM2601/2)
** 1 MHz to 10 MHz, SR
MAX
, (SR
MAX
/2) low-pass Filter ON (VM2602/3)
RMS N OISE
(SR
MAX
/2) bandwidth @ 50 Ω
Source impedance, 0.5 V range
250 µV rms maximum (IFR) (exclusive of any offset)
∗
S IGNAL TO -N OISE R ATIO (SNR)
All inputs, all ranges > 62 dB
∗
See Appendix A for information on calculating RMS noise.
VM2601/2/3 Introduction 17
VXI Technology, Inc.
A RMING , T RIGGERING , AND C LOCKING
T RIGGER S OURCE
E XTERNAL T RIGGER
Impedance
Amplitude
Level Accuracy
M AXIMUM P RE -T RIGGER S AMPLES
T RIGGER D ELAY
I NTERNAL C LOCK S OURCE
Channel Input, EXT input, Serial Word Command, TTLT bus, Sync
10 k Ω
±4 V
±5 mV
Available memory – 1
0 – 3,600 seconds
CLK10
I NTERNAL C LOCK A CCURACY
E XTERNAL A RM
Impedance
Amplitude
Resolution
CLK10
E XTERNAL C LOCK M AXIMUM F REQUENCY
VM2601
VM2602
80 MHz
40 MHz
VM2603
E XTERNAL C LOCK I MPEDANCE
20 MHz
50 Ω
A RM S OURCE
EXT, IMM, SYNC, TTLT<0-7>
10 k Ω
± 4 V
5 mV
B UILT -I N M EASUREMENT F UNCTIONS
M EASUREMENT F UNCTION
• Period
• Rise/Fall Time
• Negative/Positive Pulse Width
• V rms/V cycle rms
• V mean
• V high
• V max
E NVIRONMENTAL
• Frequency
• Negative/Positive Duty Cycle
• Negative/Positive Overshoot/Preshoot
• V peak
• V amplitude
• V low
• V min
O PERATING T EMPERATURE R ANGE
C ALIBRATION T EMPERATURE
0 °C – 60 °C
25 °C
P OWER AND C OOLING R EQUIREMENTS
V OLTAGE
+5 V
-5.2 V
+2 V
+24 V
-24 V
+12 V
-12 V
1.86 A (0.6 A)*
0.062 A (0.03 A)
0 A
0 A
(0 A)
(0 A)
2 A (0 A)
0.25 A (0 A)
0.24 A (0 A)
* Values in parenthesis represent values in stand by mode
18 VM2601/2/3 Introduction
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S ECTION 2
P
REPARATION FOR
U
SE
I NSTALLATION
When the VM2601 is unpacked from its shipping carton, the contents should include the following items:
(1) VM2601/2/3 VXIbus module
(1) VM2601/2/3 Module User’s (this manual)
All components should be immediately inspected for damage upon receipt of the unit.
Once the VM2601 is assessed to be in good condition, it may be installed into an appropriate
C-size or D-size VXIbus chassis in any slot other than slot 0. The chassis should be checked to ensure that it is capable of providing adequate power and cooling for the VM2601. Once the chassis is found adequate, the VM2601’s logical address and the backplane jumpers of the chassis should be configured before the VM2601’s installation.
C ALCULATING S YSTEM P OWER AND C OOLING R EQUIREMENTS
The power and cooling requirements of the VM2601 are given in the specification table in
Section 1 of this manual. It is imperative that the chassis provide adequate power and cooling for this module. Referring to the chassis user manual, confirm that the power budget for the system
(the chassis and all modules installed therein) is not exceeded and that the cooling system can provide adequate airflow at the specified backpressure.
It should be noted that if the chassis cannot provide adequate power to the module, the instrument may not perform to specification or possibly not operate at all. In addition, if adequate cooling is not provided, the reliability of the instrument will be jeopardized and permanent damage may occur. Damage found to have occurred due to inadequate cooling voids the warranty on the instrument in question.
VM2601/2/3 Preparation for Use 19
VXI Technology, Inc.
S ETTING THE C HASSIS B ACKPLANE J UMPERS
Please refer to the chassis user manual for further details on setting the backplane jumpers.
S
ETTING THE
L
OGICAL
A
DDRESS
The logical address of the VM2601 is set by a single 8-position DIP switch located near the module’s backplane connectors (this is the only switch on the module). The switch is labeled with positions 1 through 8 and with an ON position. A switch pushed toward the ON legend will signify logic 1; switches pushed away from the ON legend will signify logic 0. The switch located at position 1 is the least significant bit while the switch located at position 8 is the most significant bit. See Figure 2-1 for examples of setting the logical address switch.
Switch
Position
Switch
Value
1 2 3 4 5 6 7 8
ON
SET TO 4
1 2 3 4 5 6 7 8
SET TO 168
1 2 3 4 5 6 7 8
ON
SET TO 8
1 2 3 4 5 6 7 8
SET TO 255
(Dynamic)
1
2
3
4
5
6
7
8
1
2
4
8
16
32
64
128
F IGURE 2-1: L OGICAL A DDRESS S WITCH -S ETTING E XAMPLES
The VMIP may contain three separate instruments and will allocate logical addresses as required by the VXIbus specification (revisions 1.3 and 1.4). The logical address of the instrument is set on the VMIP carrier. The VMIP logical addresses must be set to an even multiple of 4 unless dynamic addressing is used . Switch positions 1 and 2 must always be set to the OFF position.
Therefore, only addresses of 4, 8, 12, 16, ... 252 are allowed. The address switch should be set for one of these legal addresses and the address for the second instrument (the instrument in the center position) will automatically be set to the switch set address plus one; while the third instrument
(the instrument in the lowest position) will automatically be set to the switch set address plus two.
If dynamic address configuration is desired, the address switch should be set for a value of 255 (all switches set to ON). Upon power-up, the slot 0 resource manager will assign the first available logical addresses to each instrument in the VMIP module.
If dynamic address configuration is desired, the address switch should be set for a value of 255.
Upon power-up, the slot 0 resource manager will assign logical addresses to each instrument in the
VMIP module.
20 VM2601/2/3 Preparation for Use
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S ECTION 3
P
ROGRAMMING
I
NTRODUCTION
The VM2601 is a VXIbus message-based device whose command set is compliant with the
Standard Commands for Programmable Instruments (SCPI) programming language.
All module commands are sent over the VXIbus backplane to the module. Commands may be in upper, lower, or mixed case. All numbers are sent in ASCII decimal unless otherwise noted.
The module recognizes SCPI commands. SCPI is a tree-structured language based on IEEE
Std 488.2 specifications. It uses the IEEE Std 488.2 Standard command and the device dependent commands are structured to allow multiple branches off the same trunk to be used without repeating the trunk. To use this facility, end each branch with a semicolon. For example, SLOPe and SOURce are both branches off the TRIGger: command trunk and can be combined as follows:
TRIGger:SLOPe <slope>;SOURce <source>
The above command is the same as these two commands:
TRIGger:SLOPe <slope>
TRIGger:SOURce <source>
See the Standard Commands for Programmable Instruments (SCPI) Manual, Volume 1: Syntax &
Style, Section 6 , for more information.
The SCPI commands in this section are listed in upper and lower case. Character case is used to indicate different forms of the same command. Keywords can have both a short form and a long form (some commands only have one form). The short form uses just the keyword characters in uppercase. The long form uses the keyword characters in uppercase plus the keyword characters in lowercase. Either form is acceptable. Note that there are no intermediate forms. All characters of the short form or all characters of the long form must be used. Short forms and long forms may be freely intermixed. The actual commands sent can be in upper case, lower case, or mixed case (case is only used to distinguish short and long form for the user). As an example, these commands are all correct and all have the same effect:
TRIGger:SLOPe <slope> trigger:slope <slope>
TRIGGER:SLOPE <slope>
TRIG:SLOPe <slope>
TRIGger:SLOP <slope>
TRIG:SLOP <slope> trig:slop <slope>
VM2601/2/3 Programming 21
VXI Technology, Inc.
N OTATION
The following command is not correct because it uses part of the long form of TRIGger , but not all the characters of the long form:
trigg:slop <slope> incorrect syntax - extra "g"
All of the SCPI commands also have a query form unless otherwise noted. Query forms contain a question mark (?). The query form allows the system to ask what the current setting of a parameter is. The query form of the command generally replaces the parameter with a question mark (?).
Query responses do not include the command header. This means only the parameter is returned: no part of the command or "question" is returned.
Keywords or parameters enclosed in square brackets ([ ]) are optional. If the optional part is a keyword, the keyword can be included or left out. Omitting an optional parameter will cause its default to be used. If using the optional parameter, the square brackets are omitted from the command or query.
Parameters are enclosed by angle brackets (< >). Braces ({ }) or curly brackets, are used to enclose one or more parameters that may be included zero or more times. A vertical bar (|), read as "or," is used to separate parameter alternatives.
22 VM2601/2/3 Programming
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A
PPLICATION
E
XAMPLES
SCPI P ROGRAMMING E XAMPLE
This section contains examples of using SCPI command strings for programming the VM2601 module. The code is functional and will contain a brief description of the operation. Note, the
SCPI commands used by the VM2601 are explained in detail in Section 4.
In this example, VM2601 sets the sweep points, sample clock frequency, input range, and trigger source. It returns the average, maximum, minimum, peak-to-peak voltage, and rms voltage of the data collected from a previous run.
SWE:POIN 32768 Sets the number of post trigger samples to
32 k.
SAMP:CLOC:FREQ 1E4
INP:RANG 20
TRIG:SOUR IMM
INIT:IMM
Sets the sample rate to 10 kHz.
Sets the input voltage range to ±20 V.
Sets the input trigger source to IMMediate .
Puts the VM2601 into the “waiting for arm”
ARM
TRIG:IMM state.
Arms the VM2601 module immediately.
Triggers the VM2601 module immediately.
At this point, after 32,768/10,000 seconds, the samples are in the buffer and the CALCulate commands can be executed.
CALC:VOLT:MEAN?
15.107537
CALC:VOLT:MAX?
19.234100
CALC:VOLT:MIN?
-12.693521
CALC:VOLT:PTP?
13.451500
CALC:VOLT:RMS?
4.653781
Returns the average data value.
Returns the peak-to-peak value starting at the trigger point and continuing to the end of data collected.
Returns the true rms value starting at the trigger point and continuing to the end of the data collected.
Returns the maximum data value collected.
Returns the minimum data value collected.
VM2601/2/3 Programming 23
VXI Technology, Inc.
R EGISTER A CCESS E XAMPLE
The VM2601 module provides hardware register access for fast data transfers. The register map is shown in Table 3-1.
In order to read the samples, execute an INITiate, ARM, TRIGger sequence as seen in the SCPI
Programming Example above. Then, use viIn16(instHndl, VI_A32_SPACE, offset, &var16bit) for a single sample or viMoveIn16(instHndl, VI_A32_SPACE, offset, number_of_samples, array16bit) for multiple samples.
To determine the dc voltage value of any sample:
1) Obtain the ADC gain and offset values from the instrument using the commands
CAL:ADC:GAIN <FAST|SLOW> and CAL:ADC:OFFS? <FAST|SLOW>.
2) Calculate the voltage as follows: voltage =
(
(double)(s ample value ADC_Offset )
16383 .
0
× ADC_Gain × 2.0
× range where ‘ range ’ is the current input range that has been programmed.
For example, in the 5 V range, for a sample value of 12,684, where ADC_Gain is 1.237854 and
ADC_Offset is 8183: voltage =
(
12684 − 8183
)
× 1 .
237854 ×
16383 .
0
2 .
0 × 0 .
5
= 0 .
340083 volts
The VM2601 digitizer’s sample memory is mapped into the VXI A32 address space by the VISA resource manager. When accessing the sample data through a call to viIn16() or viMoveIn16(), it is not necessary to know the absolute address assigned to the module. VISA uses the session handle to reference the assigned address space.
24 VM2601/2/3 Programming
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T ABLE 3-1: A16 M EMORY M AP
2
0
6
4
E
C
A
8
1C
1A
18
16
14
12
10
24
22
20
1E
2E
2C
2A
28
26
36
34
32
30
3E
3C
3A
38
[A32 Pointer Low]
[A32 Pointer High]
Data Low
Data High
Response [/Data Extended]
Protocol [/Signal] Register
[Offset Register]
Status / Control Register
Device Type
ID Register
VM2601/2/3 Programming 25
VXI Technology, Inc.
VXI PLUG & PLAY D RIVER E XAMPLE
This example shows how to access the instrument using the VXI plug&play driver.
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
// vtvm2601_appFunc() Example of how to access the instrument using the driver
// Parameters:
// ViSession instHndl
// ViInt16 handle issued by the resource manager
inputSelect Selects or input is only (For VM2602 selects or selects selects slow input coupling
sets sample the to count for data
VI_SUCCESS
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
ViStatus _VI_FUNC vtvm2601_appFunc(ViSession instHndl, ViInt32 inputSelect, ViInt32 adcSelect,
ViInt32
ViInt32
iStatus;
ViInt32
ViInt32 iStatus = vtvm2601_setInpSour(instHndl, inputSelect); // select the input if(iStatus < VI_SUCCESS) return(iStatus); iStatus = vtvm2601_setAdcType(instHndl, adcSelect); // select the ADC if(iStatus < VI_SUCCESS) return(iStatus); iStatus = vtvm2601_setInpRange(instHndl, rangeSelect); // set the range if(iStatus < VI_SUCCESS) return(iStatus); iStatus = vtvm2601_setInpCoup(instHndl, inputCoupling); // set the input coupling if(iStatus < VI_SUCCESS) return(iStatus); iStatus = vtvm2601_setSclkFreq(instHndl, sampleRate); // set the sample rate if(iStatus < VI_SUCCESS) return(iStatus); iStatus = vtvm2601_setSampCnt(instHndl, sampleCount); // set the sample count if(iStatus < VI_SUCCESS) return(iStatus);
= iStatus = vtvm2601_setPreTrig(instHndl, ptrgCnt); if(iStatus < VI_SUCCESS) return(iStatus);
iStatus if(iStatus < VI_SUCCESS) return(iStatus); iStatus = vtvm2601_cmdArmImme(instHndl); if(iStatus < VI_SUCCESS) return(iStatus); initiate operation lclDelay((double)ptrgCnt / sampleRate); // WAIT at least long enough for pre-trig iStatus = vtvm2601_cmdTrigImme(instHndl); if(iStatus < VI_SUCCESS) return(iStatus); lclDelay((double)sampleCount / sampleRate); // WAIT at least long enough for samples
// now, query the machine state for(loopCnt = 0; loopCnt < 1000; loopCnt++)
{ iStatus = vtvm2601_qryOperCondReg(instHndl, &operCond);
<
if((operCond
26 VM2601/2/3 Programming
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break;
}
iStatus // ready or not, abort the operation! if(iStatus < VI_SUCCESS) return(iStatus); if(daqState != vtvm2601_DAS_IDLE) // didn't make it to idle, data not ready!
return(vtvm2601_ERR_NOT_READY); number
= //
// Now, get the samples! iStatus = vtvm2601_a32Fetch(instHndl, segNmbr, ramOffs, sampleCount, dPointer);
return(iStatus);
}
0, use sample segment point
VM2601/2/3 Programming 27
VXI Technology, Inc.
28 VM2601/2/3 Programming
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S ECTION 4
C
OMMAND
D
ICTIONARY
I
NTRODUCTION
This section presents the instrument command set. It begins with an alphabetical list of all the commands supported by the VM2601 divided into three sections: IEEE 488.2 commands, the instrument specific SCPI commands, and the required SCPI commands. Each command provides a brief description of the command’s function, whether the command’s value is affected by the
*RST command, and, if applicable, its *RST value.
The remainder of this section is devoted to describing each command, one per page, in detail. The description is presented in a regular and systematic manner, assisting the user in the use of each command. Every command entry describes the exact command and query syntax, the use and range of parameters, and a complete description of the command’s purpose.
A LPHABETICAL C OMMAND L ISTING
The following tables provide an alphabetical listing of each command supported by the VM2601 along with a brief description. If an X is found in the column titled *RST, then the value or setting controlled by this command is possibly changed by the execution of the *RST command. If no X is found, then *RST has no effect. The *RST column gives the value of each command’s setting when the unit is powered up or when an *RST command is executed.
VM2601/2/3 Command Dictionary 29
*CLS
*ESE
*ESR?
*IDN?
*OPC
*RST
*SRE
*STB?
*TRG
*TST?
*WAI
Command
VXI Technology, Inc.
T ABLE 4-1: IEEE 488.2
C OMMON C OMMANDS
Description
Clears the Status Register
Sets the Event Status Enable Register
Query the Standard Event Status Register
Query the module identification string
Set the OPC bit in the Event Status Register
Resets the module to a known state
Set the Service Request Enable Register
Query the Status Byte Register
Causes a trigger event to occur
Starts and reports a self-test procedure
Halts execution of commands and queries
*RST *RST Value
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
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T ABLE 4-2: I NSTRUMENT S PECIFIC SCPI C OMMANDS
Command Description
ABORt
ARM:AUTO
Disarms the VM2601 and stops data sampling.
Enables or disables automatic advancing to the next buffer and rearming.
ARM:LEVel
ARM:SLOPe
ARM:SOURce
ARM:STATe?
ARM[:IMMediate]
CALCulate:FALL:TIMe?
CALCulate:FREQuency?
Sets the comparator level of the Arm Signal.
Specifies the slope of the Arm Signal.
Sets the Arm Source.
Query returns whether or not the VM2601 is armed.
Advances to the next buffer and arms the unit.
Instructs the device to return the fall time measurement for the acquired data.
Query that instructs the device to return the frequency of the digitized data.
CALCulate:NDUTy?
CALCulate:NWIDth?
Instructs the device to calculate and return the negative duty cycle for the acquired data.
Returns the negative pulse width measurement for the acquired data.
CALCulate:PDUTy? Instructs the device to calculate and return the positive duty cycle for the acquired data.
CALCulate:PERCent:NOVershoot? Returns the negative overshoot as percent of amplitude
CALCulate:PERCent:NPReshoot? Returns the negative preshoot as percent of amplitude
CALCulate:PERCent:NRINging? Returns the negative ringing as percent of amplitude
CALCulate:PERCent:POVershoot? Returns the positive overshoot as percent of amplitude
CALCulate:PERCent:PPReshoot? Returns the positive preshoot as percent of amplitude
CALCulate:PERCent:PRINging?
CALCulate:PERiod?
Returns the positive ringing as percent of amplitude
Returns the period measurement for the acquired data.
CALCulate:PWIDth? Query that returns a positive pulse width measurement.
CALCulate:RISE:TIMe?
CALCulate:VOLTage:AMPLitude? Returns the amplitude measurement for the data being acquired.
CALCulate:VOLTage:HIGH?
CALCulate:VOLTage:LOW?
Returns the rise-time measurement for the acquired data.
Returns the high voltage value for the acquired data.
Returns the low voltage value for the acquired data.
CALCulate:VOLTage:MAXimum? Returns the maximum voltage value for the acquired data.
CALCulate:VOLTage:MEAN? Returns the mean voltage value for the acquired data.
CALCulate:VOLTage:MINimum? Returns the minimum voltage value for the acquired data.
CALCulate:VOLTage:NOVershoot? Returns the negative overshoot value for the acquired data.
CALCulate:VOLTage:NPReshoot? Returns the negative preshoot value for the acquired data.
CALCulate:VOLTage:NRINging? Returns the negative ringing as peak-to-peak volts
CALCulate:VOLTage:POVershoot? Returns the positive overshoot value for the acquired data.
CALCulate:VOLTage:PPReshoot? Returns the positive preshoot value for the acquired data.
*RST *RST Value
N/A
X OFF
X
X
X
0.0
POS
IMMediate
N/A
VM2601/2/3 Command Dictionary 31
VXI Technology, Inc.
Command Description
CALCulate:VOLTage:PRINging? Returns the positive ringing as peak-to-peak volts
CALCulate:VOLTage:PTPeak? Returns the peak-to-peak voltage value for the acquired data.
CALCulate:VOLTage:RMS? Returns the root-mean-square (rms) voltage value of the data being acquired.
CALibration:ADC:GAIN To provide an ADC gain factor for measurement compensation.
CALibration:ADC:OFFSet
CALibration:COUNt?
To provide an ADC offset value for measurement compensation.
Tracks the number of times calibration memory has been written.
CALibration:DAC:GAIN
CALibration:DAC:OFFSet
CALibration:DEFault
CALibration:RESet
To set the calibration factor that compensates for
DAC gain inaccuracies.
To set the calibration factor that compensates for
DAC offset inaccuracies.
Sets all calibration factors to their default values.
Resets all calibration factors to the values stored in the non-volatile memory (EEPROM).
Sets the code required to disable calibration security.
Enable or disable calibration security.
CALibration:SECure:CODE
CALibration:SECure[:STATe]
CALibration:STORe
COMBine:FEED
Stores calibration data into non-volatile memory.
Sets a marker for specified events allowing for easy reference after acquisition is complete.
CONFigure:ADC
CONFigure:FALL:TIMe
Selects between the fast and slow ADCs.
Defines the fall time parameters that will govern corresponding CALCulate and MEASure commands.
CONFigure:FREQuency Defines the frequency parameters that will govern corresponding CALCulate and MEASure commands.
CONFigure:HORizontal:RESolution Sets the sample period for the ADC
CONFigure:NDUTy Defines the negative duty cycle parameters that will govern corresponding CALCulate and MEASure commands.
CONFigure:NWIDth Defines the negative pulse width parameters that will govern corresponding CALCulate and MEASure commands.
CONFigure:PDUTy Defines the positive duty cycle parameters that will govern corresponding CALCulate and MEASure commands.
CONFigure:PERCent:NOVershoot configure to measure negative overshoot as percent of amplitude
CONFigure:PERCent:NPReshoot configure to measure negative preshoot as percent of amplitude
CONFigure:PERCent:NRINging configure to measure negative ringing as percent of amplitude
CONFigure:PERCent:POVershoot configure to measure positive overshoot as percent of amplitude
CONFigure:PERCent:PPReshoot configure to measure positive preshoot as percent of amplitude
CONFigure:PERCent:PRINging configure to measure positive ringing as percent of amplitude
CONFigure:PERiod Defines the period parameters that will govern corresponding CALCulate and MEASure commands.
*RST *RST Value
1.000
8192
X
X
1.000 or
Cal Value
2047 or
Cal Value
ON
X GND
X FAST
100.0 ns
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Command Description
CONFigure:PWIDth
CONFigure:RISE:TIMe
Defines the positive pulse width parameters that will govern corresponding CALCulate and MEASure commands.
Defines the rise time parameters that will govern corresponding CALCulate and MEASure commands.
CONFigure:SAR:TIMe
CONFigure:SAR:TIMe? configure the Signal Aberration Region size in seconds query the Signal Aberration Region size
CONFigure:VOLTage:AMPLitude Defines the amplitude parameters that will govern corresponding CALCulate and MEASure commands.
CONFigure:VOLTage:HIGH Defines the high voltage parameters that will govern corresponding CALCulate and MEASure commands.
CONFigure:VOLTage:LOW
CONFigure:VOLTage:MAXimum Defines the maximum voltage parameters that will govern corresponding CALCulate and MEASure commands.
CONFigure:VOLTage:MEAN
Defines the low voltage parameters that will govern corresponding CALCulate and MEASure commands.
CONFigure:VOLTage:MINimum
Defines the mean voltage parameters that will govern corresponding CALCulate and MEASure commands.
Defines the minimum voltage parameters that will govern corresponding CALCulate and MEASure commands.
CONFigure:VOLTage:NOVershoot Defines the negative overshoot parameters that will govern corresponding CALCulate and MEASure commands.
CONFigure:VOLTage:NPReshoot Defines the negative preshoot parameters that will govern corresponding CALCulate and MEASure commands.
CONFigure:VOLTage:NRINging configure to measure negative ringing as peak-topeak volts
CONFigure:VOLTage:POVershoot Defines the positive overshoot parameters that will govern corresponding CALCulate and MEASure commands.
CONFigure:VOLTage:PPReshoot Defines the positive preshoot parameters that will
CONFigure:VOLTage:PRINging govern corresponding CALCulate and MEASure commands. configure to measure positive ringing as peak-topeak volts
CONFigure:VOLTage:PTPeak Defines the peak-to-peak voltage parameters that will govern corresponding CALCulate and MEASure commands.
CONFigure:VOLTage:RMS Defines the root-mean-square voltage parameters that will govern corresponding CALCulate and
MEASure commands.
CONFigure?
CONTrol:IPOWer
Outputs the current measurement configuration.
This command applies power to or removes power from the instrument.
FETCh?
INITiate:DELay
INITiate[:IMMediate]
INPut:COUPling
Retrieves the measurements taken by the INITiate command and places it in the output buffer.
Set the pre-trigger sample count.
Arms the VM2601 upon receipt of the command.
Selects ac or dc coupling on the specified input channel.
*RST *RST Value
X ON
X 1024
X DC
VM2601/2/3 Command Dictionary 33
VXI Technology, Inc.
Command Description
INPut:FILTer:FREQuency
INPut:FILTer:STATe
Selects the low-pass filter corner frequency for the specified channel.
For the specified input channel, turns the currently selected low-pass filter ON or OFF.
INPut:IMPedance
INPut:OFFSet
Sets the input impedance for the selected input channel.
This command allows the user to compensate for input signal offset.
INPut:RANGe
INPut:SOURce
MEASure:FALL:TIMe?
Sets the input range to ±0.5 V, ±1.0 V, ±2.0 V,
±5.0 V, ±10.0 V, or ±20.0 V full scale
Select the input source, single-ended IFR or differential DSO.
Performs a sequence of commands to provide a fall time measurement for the input.
MEASure:FREQuency?
MEASure:NDUTy?
MEASure:NWIDth?
Performs a sequence of commands to provide a frequency measurement for the input.
Performs a sequence of commands to provide the negative duty cycle measurement for the input.
Performs a sequence of commands to provide a negative pulse width measurement for the input.
MEASure:PDUTy? Performs a sequence of commands to provide a positive duty cycle measurement for the input.
MEASure:PERCent:NOVershoot? measure negative overshoot as percent of amplitude
MEASure:PERCent:NPReshoot? measure negative preshoot as percent of amplitude
MEASure:PERCent:NRINging? measure negative ringing as percent of amplitude
MEASure:PERCent:POVershoot? measure positive overshoot as percent of amplitude
MEASure:PERCent:PPReshoot? measure positive preshoot as percent of amplitude
MEASure:PERCent:PRINging? measure positive ringing as percent of amplitude
MEASure:PERiod? Performs a sequence of commands to provide a period measurement for the input.
MEASure:PWIDth? Performs a sequence of commands to provide a positive pulse width measurement for the input.
MEASure:RISE:TIMe?
MEASure:VOLTage:AMPLitude? Performs a sequence of commands to provide an amplitude measurement for the acquired data.
MEASure:VOLTage:HIGH?
Performs a sequence of commands to provide a rise time measurement for the input.
Performs a sequence of commands to provide the high voltage value for the acquired data.
MEASure:VOLTage:LOW?
MEASure:VOLTage:MAXimum?
Performs a sequence of commands to provide the low voltage value for the acquired data.
Performs a sequence of commands to provide the maximum voltage value for the acquired data.
MEASure:VOLTage:MEAN?
MEASure:VOLTage:MINimum?
Performs a sequence of commands to provide the mean voltage value for the acquired data.
Performs a sequence of commands to provide the minimum volgage value for the acquired data.
MEASure:VOLTage:NOVershoot? Performs a sequence of commands to provide the negative overshoot value for the acquired data.
MEASure:VOLTage:NPReshoot? Performs a sequence of commands to provide the negative preshoot value for the acquired data.
MEASure:VOLTage:NRINging? measure negative ringing as peak-to-peak volts
MEASure:VOLTage:POVershoot? Performs a sequence of commands to provide the positive overshoot value for the acquired data
*RST *RST Value
X OFF
X High
X 0.0
X DSO
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Command Description
MEASure:VOLTage:PPReshoot? Performs a sequence of commands to provide the positive preshoot value for the acquired data.
MEASure:VOLTage:PRINging?
MEASure:VOLTage:PTPeak? measure positive ringing as peak-to-peak volts
Performs a sequence of commands to provide the
MEASure:VOLTage:RMS? peak-to-peak voltage value for the acquired data.
Performs a sequence of commands to provide the root-mean-square value for the acquired data.
READ?
ROSCillator:FREQuency
ROSCillator:SOURce
SAMPle:CLOCk:FREQuency
SAMPle:CLOCk:SOURce
SWEep:COUNt
SWEep:POINts
SWEep:TINTerval
SYNChronize:MODE
SYNChronize:STATe
TRIGger:LEVel
TRIGger:SLOPe
Initiates, arms, triggers, and fetches a previously configured measurement.
Sets the reference oscillator frequency.
Selects the reference oscillator source.
Outputs the selected sample clock frequency.
Selects the sample clock source.
Set the number of segments.
Set the post-trigger sample count.
This command sets the sample rate for the ADC.
Sets the instrument to function as a synchronized master or slave.
Enables/disables synchronization operations.
Sets the comparator level of the trigger signal.
Specifies the slope of the Trigger Signal for the
VM2601.
TRIGger:SOURce
TRIGger:STATe?
Selects the source for triggering the VM2601.
Query returns whether or not the VM2601 has been triggered.
TRIGger[:IMMediate] Triggers the instrument on receipt of the command.
*RST *RST Value
X
X
X
X
X
X
X
10 MHz
BUS
10 MHz
INTernal
1
1024
100 ns (Fast)
X OFF
X
X
OFF
0.0 V
X POS
X IMMediate
X 0
VM2601/2/3 Command Dictionary 35
VXI Technology, Inc.
Command
STATus:OPERation:CONDition?
STATus:OPERation:ENABle
STATus:OPERation[:EVENt]?
STATus:PRESet
STATus:QUEStionable:CONDition?
STATus:QUEStionable:ENABle
STATus:QUEStionable[:EVENt]?
SYSTem:ERRor?
SYSTem:VERSion?
T ABLE 4-3: SCPI R EQUIRED C OMMANDS
Description
Queries the Operation Status Condition
Register.
Sets the Operation Status Enable
Register.
Queries the Operation Status Event
Register.
Presets the Status Register.
Queries the Questionable Status
Condition Register.
Sets the Questionable Status Enable
Register.
Queries the Questionable Status Event
Register.
Queries the Error Queue.
Queries which version of the SCPI standard the module complies with.
*RST *RST Value
N/A
N/A
N/A
N/A
N/A
N/A
N/A
X Clears queue
N/A
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C OMMAND D ICTIONARY
The remainder of this section is devoted to the actual command dictionary. Each command is fully described on its own page. In defining how each command is used, the following items are described:
Purpose
Type
Describes the purpose of the command.
Describes the type of command such as an event or setting.
Command Syntax
Command Parameters Describes the parameters sent with the command and their legal range.
Details the exact command format.
Reset Value
Query Syntax
Query Parameters
Describes the values assumed when the *RST command is sent.
Details the exact query form of the command.
Describes the parameters sent with the command and their legal range. The default parameter values are assumed the same as in the command form unless described otherwise.
Query Response
Description
Examples
Related Commands
Describes the format of the query response and the valid range of output.
Describes in detail what the command does and refers to additional sources.
Present the proper use of each command and its query (when available).
Lists commands that affect the use of this command or commands that are affected by this command.
VM2601/2/3 Command Dictionary 37
VXI Technology, Inc.
C
OMMON
SCPI C
OMMANDS
*CLS
Purpose
Type
Clears all status and event registers.
IEEE 488.2 Common Command
Command Syntax
Command Parameters None
*RST Value N/A
Query Syntax
Query Parameters
None
N/A
Query Response N/A
Description
*CLS
This command clears the Status Event Register, Operation Status Register, and the
Questionable Data/Signal Register. It also clears the Operation Complete flag and clears all queues (except the output queue).
Examples
Related Commands
Command / Query
*CLS
N/A
Response (Description)
(Clears all status and event registers)
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*ESE
Purpose
Type
Command Syntax
Sets the bits of the Event Status Enable Register.
IEEE 488.2 Common Command
*ESE <mask>
Command Parameters <mask> = numeric ASCII value
*RST Value N/A, the parameter is required
Query Syntax
Query Parameters
*ESE?
N/A
Query Response
Description
Numeric ASCII value from 0 to 255
The Event Status Enable (ESE) command is used to set the bits of the Event Status
Enable Register. See ANSI/IEEE 488.2-1987 section 11.5.1 for a complete description of the ESE register. A value of 1 in a bit position of the ESE register enables generation of the Event Status Bit (ESB) in the Status Byte by the corresponding bit in the Event Status Register (ESR). If the ESB is set in the Service
Request Enable (SRE) register, then an interrupt will be generated. See the *ESR? query for details regarding the individual bits. The ESE register layout is:
Bit 0 - Operation Complete
Bit 1 - Request Control
Bit 2 - Query Error
Bit 3 - Device Dependent Error
Bit 4 - Execution Error
Bit 5 - Command Error
Bit 6 - User Request
Bit 7 - Power On
The Event Status Enable query reports the current contents of the Event Status
Enable Register.
Examples Command / Query
*ESE 36
Response (Description)
Related Commands
*ESE?
*ESR?
36 (Returns the value of the event status enable register)
VM2601/2/3 Command Dictionary 39
VXI Technology, Inc.
*ESR?
Purpose
Type
Command Syntax
Queries and clears the Standard Event Status Register.
IEEE 488.2 Common Command
None
Command Parameters N/A
*RST Value N/A
Query Syntax
Query Parameters
*ESR?
None
Query Response
Description
Numeric ASCII value from 0 to 255
The Event Status Register (ESR) query - queries and clears the contents of the
Standard Event Status Register. This register is used in conjunction with the ESE register to generate the Event Status Bit (ESB) in the Status Byte. The layout of the
ESR is:
Bit 0 - Operation Complete
Bit 1 - Request Control
Bit 2 - Query Error
Bit 3 - Device Dependent Error
Bit 4 - Execution Error
Bit 5 - Command Error
Bit 6 - User Request
Bit 7 - Power On
The Operation Complete bit is set when it receives an *OPC command.
The Query Error bit is set when data is over-written in the output queue. This could occur if one query is followed by another without reading the data from the first query.
The Execution Error bit is set when an execution error is detected. Errors that range from -200 to -299 are execution errors.
The Command Error bit is set when a command error is detected. Errors that range from -100 to -199 are command errors.
The Power On bit is set when the module is first powered on or after it receives a reset via the VXI Control Register. Once the bit is cleared (by executing the *ESR? command) it will remain cleared.
Examples Command / Query
*ESR?
Response
4
(Description)
Related Commands *ESE
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*IDN?
Purpose
Type
Queries the module for its identification string.
IEEE 488.2 Common Command
Command Syntax None
Command Parameters N/A
*RST Value
Query Syntax
Query Parameters
Query Response
Description
N/A
*IDN?
None
ASCII character string
The Identification (IDN) query returns the identification string of the module. The response is divided into four fields separated by commas. The first field is the manufacturer’s name, the second field is the model number, the third field is an optional serial number, and the fourth field is the firmware revision number. If a serial number is not supplied, the third field is set to 0 (zero).
Examples Command / Query
*IDN?
Related Commands N/A
Response (Description)
VXI Technology, Inc.,VM2601,0,1.0
(The revision listed here is for reference only; the response will always be the current revision of the instrument.)
VM2601/2/3 Command Dictionary 41
VXI Technology, Inc.
*OPC
Purpose
Type
Sets the OPC bit in the Event Status Register.
IEEE 488.2 Common Command
Command Syntax *OPC
Command Parameters None
*RST Value
Query Syntax
Query Parameters
Query Response
Description
N/A
*OPC?
None
1
The Operation Complete (OPC) command sets the OPC bit in the Event Status
Register when all pending operations have completed. The OPC query will return a 1 to the output queue when all pending operations have completed.
Examples
Related Commands
Command / Query
*OPC
*OPC?
*WAI
Response (Description)
(Sets the OPC bit in the Event Status Register)
1 (Returns the value of the Event Status Register)
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*RST
Purpose
Type
Resets the module’s hardware and software to a known state.
IEEE 488.2 Common Command
Command Syntax *RST
Command Parameters None
*RST Value
Query Syntax
Query Parameters
Query Response
Description
N/A
None
N/A
N/A
The Reset (RST) command resets the module’s hardware and software to a known state. See the Alphabetical Command Listing at the beginning of this chapter for the default parameter values used with this command.
Examples
Related Commands
Command / Query
*RST
N/A
Response (Description)
(Resets the module)
VM2601/2/3 Command Dictionary 43
VXI Technology, Inc.
*SRE
Purpose
Type
Sets the service request enable register.
IEEE 488.2 Common Command
Command Syntax *SRE <mask>
Command Parameters <mask> = Numeric ASCII value from 0 to 255
*RST Value
Query Syntax
Query Parameters
Query Response
Description
TBD
*SRE?
None
Numeric ASCII value from 0 to 255
The Service Request Enable (SRE) mask is used to control which bits in the status byte generate back plane interrupts. If a bit is set in the mask that newly enables a bit set in the status byte and interrupts are enabled, the module will generate a REQUEST
TRUE event via an interrupt. See the *STB? query for the layout of bits.
Note:
Bit 6 is always internally cleared to zero as required by IEEE 488.2 section 11.3.2.3.
The layout of the Service Request Enable Register is:
Bit 0 - Unused
Bit 1 - Unused
Bit 2 - Error Queue Has Data
Bit 3 - Questionable Status Summary (Not Used)
Bit 4 - Message Available
Bit 5 - Event Status Summary
Bit 6 - 0 (per IEEE 488.2 section 11.3.2.3)
Bit 7 - Operation Status Summary
Examples Command / Query
*SRE 4
Response (Description)
(Sets the service request enable register)
*SRE? 4 (Returns the value of the SRE register)
Related Commands N/A
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*STB?
Purpose
Type
Queries the Status Byte Register.
IEEE 488.2 Common Command
Command Syntax None
Command Parameters N/A
*RST Value
Query Syntax
Query Parameters
Query Response
Description
N/A
*STB?
None
Numeric ASCII value from 0 to 255
The Read Status Byte (STB) query fetches the current contents of the Status Byte
Register. See the IEEE 488.2 specification for additional information regarding the
Status byte Register and its use. The layout of the Status Register is:
Examples
Bit 0 - Unused
Bit 1 - Unused
Bit 2 - Error Queue Has Data
Bit 4 - Questionable Status Summary (not used)
Bit 5 - Message Available
Bit 6 - Master Summary Status
Bit 7 - Operation Status Summary
Command / Query Response (Description)
*STB? 16 ( Queries the Status Byte Register)
Related Commands N/A
VM2601/2/3 Command Dictionary 45
*TRG
Purpose
Type
Causes a trigger event to occur.
IEEE 488.2 Common Command
Command Syntax *TRG
Command Parameters None
*RST Value
Query Syntax
Query Parameters
Query Response
Description
N/A
None
N/A
N/A
The Trigger command causes a trigger event to occur.
VXI Technology, Inc.
Examples
Related Commands
Command / Query
*TRG
N/A
Response (Description)
(Triggers an event)
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*TST?
Purpose
Type
Causes a self-test procedure to occur and queries the results.
IEEE 488.2 Common Command
Command Syntax None
Command Parameters N/A
*RST Value
Query Syntax
Query Parameters
Query Response
Description
N/A
*TST?
N/A
Numeric ASCII value from 0 to 1.
Initiates the digitizer self-test operation. If the test fails, an error message is placed in the error queue and then the error LED blinks. The self test tests the following:
0 = Passed
1 = Failed sample RAM test
Examples
Related Commands
Command / Query
*TST?
N/A
Response (Description)
0 ( Begins the self-test procedure returns the result)
VM2601/2/3 Command Dictionary 47
VXI Technology, Inc.
*WAI
Purpose
Type
Command Syntax *WAI
Command Parameters None
*RST Value
Query Syntax
Query Parameters
Query Response
Description
Halts execution of additional commands and queries until the No Operation Pending message is true.
IEEE 488.2 Common Command
N/A
None
N/A
N/A
The Wait to Continue command halts the execution of commands and queries until the
No Operation Pending message is true. This command makes sure that all previous commands have been executed before proceeding. It provides a way of synchronizing the module with its commander.
Examples
Related Commands
Command / Query
*WAI
*OPC
Response (Description)
(Pauses the execution of additional commands until the No Operation Pending message is true.)
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I
NSTRUMENT
S
PECIFIC
SCPI C
OMMANDS
ABORt
Purpose
Type
Aborts any active measurement process.
Event
Command Syntax ABORt
Command Parameters None
*RST Value N/A
Query Syntax
Query Parameters
None
N/A
Query Response N/A
Description The Abort command disarms the VM2601 and stops data sampling (if active).
Examples
Related Commands
Command / Query
ABOR
INITiate[:IMMediate]
Response (Description)
(Stops data sampling and disarms the module)
VM2601/2/3 Command Dictionary 49
VXI Technology, Inc.
ARM:AUTO
Purpose
Type
Command Syntax
Enables or disables the automatic rearm process.
Command
ARM:AUTO <boolean>
Command Parameters <boolean> = 0 | 1 | OFF | ON
*RST Value OFF
Query Syntax
Query Parameters
ARM:AUTO?
None
Query Response
Description
Returns the value currently selected for the <boolean> parameter
This command enables or disables the automatic re-arm process. This applies to multiple segment acquisitions only (see SWEep:COUNt for more information on segments). As an example, assume that the VM2601 is configured for 64 segments, auto-rearm is enabled, the input trigger source is selected, and the input signal is a repetetive pulse burst with a duration of [0.1 * (sample rate * number of samples)] occurring at random intervals. If an “INIT” command is sent followed by an “ARM” command, it will set up the instrument to acquire a “snapshot” of each burst, which is triggered by the input signal, and each “snapshot” will be stored in separate segment. If auto-rearm were disabled, it would be necessary to rearm the instrument between bursts with an external signal or a software command.
Examples Command / Query
ARM:AUTO 1
Response (Description)
(Enables the automatic rearm process.)
Related Commands
ARM:AUTO?
ARM
ARM:IMMediate
ARM:LEVel
ARM:SLOPe
ARM:SOURce
SWEep:COUNt
1 ( Indicates that the automatic rearm process is enabled.
)
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ARM[:IMMediate]
Purpose
Type
Command Syntax
Arms the instrument on receipt of the command.
Command
ARM[:IMMediate]
Command Parameters None
*RST Value N/A
Query Syntax
Query Parameters
None
N/A
Query Response
Description
N/A
Arms the instrument on receipt of the command and puts the device into Waiting For
Trigger mode.
Examples
Related Commands
Command / Query
ARM:IMM
ARM
ARM:LEVel
ARM:SLOPe
ARM:SOURce
Response (Description)
(Arms VM2601)
VM2601/2/3 Command Dictionary 51
VXI Technology, Inc.
ARM:LEVel
Purpose
Type
Command Syntax
Sets the level at which the instrument will be armed (external input).
Command
ARM:LEVel <arm_level>
Command Parameters <arm_level> = -4 V to +4 V
*RST Value <arm_level> = 0.0
Query Syntax
Query Parameters
ARM:LEVel?
None
Query Response
Description
Returns the value currently set for the <arm_level> parameter.
Sets the level at which the instrument will be armed by a signal present at the ARM/GP1 input, assuming that ARM:SOURce EXT has been selected. The range is approximately
±4 V.
Examples
Related Commands
Command / Query
ARM:LEV 2.56
ARM
ARM:IMMediate
ARM:SLOPe
ARM:SOURce
Response (Description)
(Sets the comparator level to 2.56 V)
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ARM:SLOPe
Purpose
Type
Command Syntax
Specifies the slope of the arm signal.
Command
ARM:SLOPe <arm_slope>
Command Parameters <arm_slope> = POSitive | NEGative
*RST Value <arm_slope> = POSitive
Query Syntax
Query Parameters
ARM:SLOPe?
None
Query Response
Description
POS | NEG
Specifies the slope of the arm signal when the arm source is set to EXTernal or TTL.
Examples
Related Commands
Command / Query
ARM:SLOP NEG
ARM:SLOP?
ARM
ARM:IMMediate
ARM:LEVel
ARM:SOURce
Response (Description)
(Sets the VM2601 to arm on a negative slope.)
NEG (Indicates that the VM2601 will arm on a negative slope.)
VM2601/2/3 Command Dictionary 53
VXI Technology, Inc.
ARM:SOURce
Purpose
Type
Command Syntax
Sets the arm source.
Command
ARM:SOURce <arm_source>
Command Parameters <arm_source> = EXTernal | IMMediate | SYNC | TTLT<0-7>
*RST Value <arm_source> = IMMediate
Query Syntax
Query Parameters
ARM:SOURce?
None
Query Response
Description
Returns the value currently selected for the <arm_source> parameter.
Sets the arm source:
EXT : ARM/GP1 input
IMM : software command (ARM:IMM)
SYNC : Master/Slave SYNC subsystem
TTLT : VXIbus TTL backplane trigger
Examples
Related Commands
Command / Query
ARM:SOUR TTLT3
ARM:SOUR?
ARM
ARM:IMMediate
ARM:LEVel
ARM:SLOPe
Response (Description)
(Sets the arm source to TTLT3.)
TTLT3 (Indicates that the arm source is the
TTLT3 line.)
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CALCulate:FALL:TIMe
Purpose
Type
Command Syntax
Query that instructs the device to calculate and return fall time measurement.
Query
None
Command Parameters N/A
*RST Value N/A
Query Syntax CALCulate:FALL:TIMe? or
CALCultate:FTIMe?
Query Parameters
Query Response
Description
None
ASCII number representing fall-time measurement
The CALCulate:FALL:TIME query instructs the instrument to calculate and return the amount of time it takes a signal to make a negative transition from the high reference to the low reference. The high reference defaults to 90% of the signal amplitude, and the low reference defaults to 10% of the signal amplitude.
1.0
90% reference 0.8
0.6
0.4
Examples
Related Commands
0.2
10% reference
Fall
Time
0 2 4 6 8 10 12 14 16 18 20
To correctly perform a CALCulate function, a data set must be acquired (INITiate,
ARM, TRIGger), and the data may be transferred to the host (register access) before the execution CALC query. This sequence is not a prerequisite for sending a CALCulate query, but is required for valid data to be returned.
Command / Query Response (Description)
CALC:FTIM? (Returns the fall time measurement.)
CONFigure:FALL:TIMe
MEASure:FALL:TIMe
VM2601/2/3 Command Dictionary 55
VXI Technology, Inc.
CALCulate:FREQuency?
Purpose
Type
Command Syntax
Query that instructs the device to calculate and return the frequency of the digitized data.
Query
None
Command Parameters N/A
*RST Value N/A
Query Syntax
Query Parameters
CALCulate:FREQuency?
None
Query Response
Description
ASCII number representing frequency measurement in Hz.
The CALCulate:FREQuency query instructs the device to calculate and return the frequency of the digitized data. Frequency ( f ) is a measure of how many times a signal repeats in one second (1/s = Hz). This is also equal to 1/period (or 1/T).
To correctly perform a CALCulate function, a data set must be acquired (INITiate,
ARM, TRIGger), and the data may be transferred to the host (register access) before the execution CALC query. This sequence is not a prerequisite for sending a CALCulate query, but is required for valid data to be returned.
Examples
Related Commands
Command / Query
CALC:FREQ?
CONFigure:FREQuency
MEASure:FREQuency
Response (Description)
(Returns the frequency measurement.)
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CALCulate:NDUTy?
Purpose
Type
Command Syntax
Query that instructs the device to calculate and return the negative duty cycle.
Query
None
Command Parameters N/A
*RST Value N/A
Query Syntax
Query Parameters
CALCulate:NDUTy?
None
Query Response
Description
ASCII number representing negative duty cycle measurement as a percentage
The CALCulateNDUTy query instructs the device to calculate and return the negative duty cycle of the digitized data. The negative duty cycle is defined as the negative pulse width divided by the period and is expressed as a percentage.
To correctly perform a CALCulate function, a data set must be acquired (INITiate,
ARM, TRIGger), and the data may be transferred to the host (register access) before the execution CALC query. This sequence is not a prerequisite for sending a CALCulate query, but is required for valid data to be returned.
Examples
Related Commands
Command / Query
CALC:NDUT?
CONFigure:NDUTy
MEASure:NDUTy
Response (Description)
(Returns the negative duty cycle measurement.)
VM2601/2/3 Command Dictionary 57
VXI Technology, Inc.
CALCulate:NWIDth?
Purpose
Type
Command Syntax
Query that returns a negative pulse width measurement.
Query
None
Command Parameters N/A
*RST Value N/A
Query Syntax
Query Parameters
CALCulate:PWIDth?
None
Query Response
Description
ASCII number representing a negative pulse width measurement in seconds.
The CALCulate:NWIDth query instructs the devuce to calculate and return a negative pulse width measurement. The negative pulse width is a measure of the time required to go from the 50% reference of the falling edge of one wave to the 50% reference of the rising edge on the next wave on a negative pulse.
1.0
0.8
0.6
0.4
0.2
50% reference
Negative
Pulse
Width
Examples
Related Commands
0 2 4 6 8 10 12 14 16 18 20
To correctly perform a CALCulate function, a data set must be acquired (INITiate,
ARM, TRIGger), and the data may be transferred to the host (register access) before the execution CALC query. This sequence is not a prerequisite for sending a CALCulate query, but is required for valid data to be returned.
Command / Query Response (Description)
CALC:PWID? (Returns the positive pulse width measurement.)
CONFigure:NWIDth
MEASure:NWIDth
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CALCulate:PDUTy?
Purpose
Type
Command Syntax
Query that instructs the device to calculate and return the positive duty cycle.
Query
None
Command Parameters N/A
*RST Value N/A
Query Syntax
Query Parameters
CALCulate:PDUTy?
None
Query Response
Description
ASCII number representing positive duty cycle measurement as a percentage.
The CALCulate:PDUTy query instructs the device to calculate and return the positive duty cycle of the digitized data. The positive duty cycle is defined as the positive pulse width divided by the period and is expressed as a percentage.
To correctly perform a CALCulate function, a data set must be acquired (INITiate,
ARM, TRIGger), and the data may be transferred to the host (register access) before the execution CALC query. This sequence is not a prerequisite for sending a CALCulate query, but is required for valid data to be returned.
Examples
Related Commands
Command / Query
CALC:PDUT?
CONFigure:PDUTy
MEASure:PDUTy
Response (Description)
(Returns the positive duty cycle measurement.)
VM2601/2/3 Command Dictionary 59
VXI Technology, Inc.
CALCulate:PERCent:NOVershoot?
Purpose
Type
Command Syntax
Returns the negative overshoot as a percent of the signal amplitude.
Query
None
Command Parameters N/A
*RST Value N/A
Query Syntax
Query Parameters
CALCulate: PERCent:NOVershoot?
None
Query Response
Description
ASCII value representing a voltage measurement.
The CALCulate:PERCent:NOVershoot query instructs the device to calculate and return the value corresponding to the negative overshoot as a percentage of the signal amplitude from the selected input range. The negative overshoot is defined as the amount of voltage by which a post-transitional aberration negatively exceeds a state boundary.
1.0
0.8
0.6
0.4
0.2
Amplitude
Negative Overshoot
Examples
Related Commands
0 2 4 6 8 10 12 14 16 18 20
To correctly perform a CALCulate function, a data set must be acquired (INITiate,
ARM, TRIGger), and the data may be transferred to the host (register access) before the execution CALC query. This sequence is not a prerequisite for sending a CALCulate query, but is required for valid data to be returned.
Command / Query Response (Description)
CALC:PERC:NOV? (Returns the negative overshoot voltage as a percentage of the signal amplitude.)
CONFigure:PERC:NOV
MEASure:PERC:NOV
www.vxitech.com
CALCulate:PERCent:NPReshoot?
Purpose Returns the negative preshoot value for the acquired data as a percent of the signal amplitude.
Type Query
Command Syntax None
Command Parameters N/A
*RST Value
Query Syntax
Query Parameters
Query Response
Description
N/A
CALCulate:PERCent:NPReshoot?
None
ASCII value representing a voltage measurement in volts.
The CALCulate:PERCent:NPReshoot query instructs the device to calculate and return a voltage value corresponding to the negative preshoot from the selected input range. The negative preshoot is defined as the amount of voltage by which a pre-transitional aberration negatively exceeds a state boundary.
1.0
0.8
0.6
Negative Preshoot
0.4
0.2
Amplitude
Examples
Related Commands
0 2 4 6 8 10 12 14 16 18 20
To correctly perform a CALCulate function, a data set must be acquired (INITiate,
ARM, TRIGger), and the data may be transferred to the host (register access) before the execution CALC query. This sequence is not a prerequisite for sending a CALCulate query, but is required for valid data to be returned.
Command / Query Response (Description)
CALC:PERC:NPR? (Returns the negative pershoot value as a percent of the signal amplitude.)
CONFigure:PERC:NPR
MEASure:PERC:NPR
VM2601/2/3 Command Dictionary 61
VXI Technology, Inc.
CALCulate:PERCent:NRINging?
Purpose
Type
Command Syntax
Returns the negative ringing as a percent of the signal amplitude.
Query
None
Command Parameters N/A
*RST Value N/A
Query Syntax
Query Parameters
CALCulate:PERCent:NRINging?
None
Query Response
Description
ASCII value representing a voltage measurement.
The CALCulate:PERCent:NRINGing query instructs the device to calculate and return a value corresponding to the negative ringing of an signal on the selected input range as a percent of the signal amplitude. Negative ringing is defined as the peak-to-peak voltage of a negative post-transitional aberration.
1.0
0.8
0.6
0.4
0.2
Negative
Ringing
Amplitude
Examples
Related Commands
0 2 4 6 8 10 12 14 16 18 20
To correctly perform a CALCulate function, a data set must be acquired (INITiate,
ARM, TRIGger), and the data may be transferred to the host (register access) before the execution CALC query. This sequence is not a prerequisite for sending a CALCulate query, but is required for valid data to be returned.
Command / Query Response (Description)
CALC:PERC:NRIN? (Returns the negative ringing value as a percent of the signal amplitude.)
CONFigure:PERC:NRIN
MEASure:PERC:NRIN
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CALCulate:PERCent:POVershoot?
Purpose Returns the positive overshoot value for the acquired data as a percent of the signal amplitude.
Type
Command Syntax
Command Parameters N/A
*RST Value
Query
None
N/A
Query Syntax CALCulate:PERCent:POVershoot?
Query Parameters None
Query Response
Description
ASCII value representing a voltage measurement in volts.
The CALCulate:PERCent:POVershoot query instructs the device to calculate and return a voltage value corresponding to the positive overshoot from the selected input range as a percent of the signal amplitude. The positive overshoot is defined as the amount of voltage by which a post-transitional aberration positively exceeds the state boundary.
1.0
Positive Overshoot
0.8
0.6
0.4
0.2
Amplitude
Examples
Related Commands
0 2 4 6 8 10 12 14 16 18 20
To correctly perform a CALCulate function, a data set must be acquired (INITiate,
ARM, TRIGger), and the data may be transferred to the host (register access) before the execution CALC query. This sequence is not a prerequisite for sending a CALCulate query, but is required for valid data to be returned.
Command / Query Response (Description)
CALC:PERC:POV? (Returns the positive overshoot as a percent of the signal amplitude.)
CONFigure:PERC:POV
MEASure:PERC:POV
VM2601/2/3 Command Dictionary 63
VXI Technology, Inc.
CALCulate:PERCent:PPReshoot?
Purpose Returns the positive preshoot value for the aquried data as a percent of the signal amplitude.
Type
Command Syntax
Command Parameters N/A
*RST Value
Query
None
N/A
Query Syntax CALCulate:PERCent:PPReshoot?
Query Parameters None
Query Response
Description
ASCII value representing a voltage measurement in volts.
The CALCulate:PERCent:PPReshoot query instructs the device to calculate and return a voltage value corresponding to the positive preshoot from the selected input range as a percent of the signal amplitude. The positive preshoot is defined as the amount of voltage by which a pre-transitional aberration positively exceeds the state boundary.
1.0
Positive Preshoot
0.8
0.6
0.4
0.2
Amplitude
Examples
Related Commands
0 2 4 6 8 10 12 14 16 18 20
To correctly perform a CALCulate function, a data set must be acquired (INITiate,
ARM, TRIGger), and the data may be transferred to the host (register access) before the execution CALC query. This sequence is not a prerequisite for sending a CALCulate query, but is required for valid data to be returned.
Command / Query Response (Description)
CALC:PERC:PPR? (Returns the positive preshoot measurement as a percent of the signal amplitude.)
CONFigure:PERC:PPR
MEASure:PERC:PPR
www.vxitech.com
CALCulate:PERCent:PRINging?
Purpose
Type
Command Syntax
Returns the positive ringing as a percent of the signal amplitude.
Query
None
Command Parameters N/A
*RST Value N/A
Query Syntax
Query Parameters
CALCulate:PERCent:PRINging?
None
Query Response
Description
ASCII value representing a voltage measurement in volts.
The CALCulate:PERCent:PRINGing query instructs the device to calculate and return a value corresponding to the negative ringing of an signal on the selected input range as a percent of the signal amplitude. The CALCulate:VOLTage:PRINGing query instructs the device to calculate and return a value corresponding to the positive ringing of an signal on the selected input range. Positive ringing is defined as the peak-to-peak voltage of a positive post-transitional aberration.
1.0
Positive
Ringing
0.8
0.6
0.4
0.2
Amplitude
Examples
Related Commands
0 2 4 6 8 10 12 14 16 18 20
To correctly perform a CALCulate function, a data set must be acquired (INITiate,
ARM, TRIGger), and the data may be transferred to the host (register access) before the execution CALC query. This sequence is not a prerequisite for sending a CALCulate query, but is required for valid data to be returned.
Command / Query Response (Description)
CALC:PERC:PRIN? (Returns the positive ringing value as a percent of the signal amplitude.)
CONFigure:PERC:PRIN
MEASure: PERC:PRIN
VM2601/2/3 Command Dictionary 65
VXI Technology, Inc.
CALCulate:PERiod?
Purpose
Type
Command Syntax
Query that returns a period measurement from the device.
Query
None
Command Parameters N/A
*RST Value N/A
Query Syntax
Query Parameters
CALCulate:PERiod?
None
Query Response
Description
ASCII number representing a period measurement in seconds.
Query that returns a period measurement from the device. The period (T) is defined as the amount of time required for the signal to generate one signal cycle. This is also defined as 1/frequency (or 1/ f ).
To correctly perform a CALCulate function, a data set must be acquired (INITiate,
ARM, TRIGger), and the data may be transferred to the host (register access) before the execution CALC query. This sequence is not a prerequisite for sending a CALCulate query, but is required for valid data to be returned.
Examples
Related Commands
Command / Query
CALC:PER?
CONFigure:PERiod
MEASure:PERiod
Response (Description)
(Returns the period measurement.)
www.vxitech.com
CALCulate:PWIDth?
Purpose
Type
Command Syntax
Query that returns a positive pulse width measurement.
Query
None
Command Parameters N/A
*RST Value N/A
Query Syntax
Query Parameters
CALCulate:PWIDth?
None
Query Response
Description
ASCII number representing a positive pulse width measurement in seconds.
The CALCulate:PWIDth query returns a positive pulse width measurement. The positive pulse width is a measure of the time required to go from the 50% reference of the rising edge of one wave to the 50% reference of the next falling edge.
1.0
0.8
0.6
0.4
0.2
50% reference
Positive
Pulse
Width
Examples
Related Commands
0 2 4 6 8 10 12 14 16 18 20
To correctly perform a CALCulate function, a data set must be acquired (INITiate,
ARM, TRIGger), and the data may be transferred to the host (register access) before the execution CALC query. This sequence is not a prerequisite for sending a CALCulate query, but is required for valid data to be returned.
Command / Query Response (Description)
CALC:PWID? (Returns the positive pulse width measurement.)
CONFigure:FREQuency
MEASure:PWIDth
VM2601/2/3 Command Dictionary 67
VXI Technology, Inc.
CALCulate:RISE:TIMe?
Purpose
Type
Command Syntax
Query that returns a rise-time measurement.
Query
None
Command Parameters N/A
*RST Value N/A
Query Syntax CALCulate:RISE:TIMe? or
CALCulate:RTIMe?
Query Parameters
Query Response
Description
None
ASCII number representing a rise time measurement in seconds.
The CALCulate:RISE:TIME query instructs the instrument to calculate and return the amount of time it takes a signal to make a positive transition from the low reference to the high reference. The high reference defaults to 90% of the signal amplitude, and the low reference defaults to 10% of the signal amplitude.
1.0
0.8
90% reference
0.6
0.4
Examples
Related Commands
0.2
10% reference
Rise
Time
0 2 4 6 8 10 12 14 16 18 20
To correctly perform a CALCulate function, a data set must be acquired (INITiate,
ARM, TRIGger), and the data may be transferred to the host (register access) before the execution CALC query. This sequence is not a prerequisite for sending a CALCulate query, but is required for valid data to be returned.
Command / Query Response (Description)
CALC:RISE:TIM? (Returns the rise time measurement.)
CONFigure:RISE:TIMe
MEASure:RISE:TIMe
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CALCulate:VOLTage:AMPLitude?
Purpose
Type
Command Syntax
Returns the amplitude measurement for the data being acquired.
Query
None
Command Parameters N/A
*RST Value N/A
Query Syntax
Query Parameters
CALCulate:VOLTage:AMPLitude?
None
Query Response
Description
ASCII value representing a voltage amplitude measurement in volts.
The CALCulate:VOLTage:AMPlitude query instructs the device to calculate and return an amplitude measurement for the data being acquired. Amplitude is defined as the voltage difference between the high and low states.
1.0
0.8
0.6
0.4
0.2
Amplitude
Examples
Related Commands
0 2 4 6 8 10 12 14 16 18 20
To correctly perform a CALCulate function, a data set must be acquired (INITiate,
ARM, TRIGger), and the data may be transferred to the host (register access) before the execution CALC query. This sequence is not a prerequisite for sending a CALCulate query, but is required for valid data to be returned.
Command / Query Response (Description)
CALC:VOLT:AMPL?
CONFigure:VOLTage:AMPLitude
MEASure: VOLTage:AMPLitude
(Returns the voltage amplitude measurement.)
VM2601/2/3 Command Dictionary 69
VXI Technology, Inc.
CALCulate:VOLTage:HIGH?
Purpose
Type
Command Syntax
Returns the high voltage value for the acquired data.
Query
None
Command Parameters N/A
*RST Value N/A
Query Syntax
Query Parameters
CALCulate:VOLTage:HIGH?
None
Query Response
Description
ASCII value representing a voltage measurement in volts.
The CALCulate:VOLTage:HIGH query instructs the device to calculate and return a voltage value from the data representing the high state.
High
1.0
0.8
0.6
0.4
0.2
Examples
Related Commands
0 2 4 6 8 10 12 14 16 18 20
To correctly perform a CALCulate function, a data set must be acquired (INITiate,
ARM, TRIGger), and the data may be transferred to the host (register access) before the execution CALC query. This sequence is not a prerequisite for sending a CALCulate query, but is required for valid data to be returned.
Command / Query Response (Description)
CALC:VOLT:HIGH?
CONFigure:VOLTage:HIGH
MEASure:VOLTage:HIGH
(Returns the high input voltage value.)
www.vxitech.com
CALCulate:VOLTage:LOW?
Purpose
Type
Command Syntax
Returns the low voltage value for the acquired data.
Query
None
Command Parameters N/A
*RST Value N/A
Query Syntax
Query Parameters
CALCulate:VOLTage:LOW?
None
Query Response
Description
ASCII value representing a voltage measurement in volts.
The CALCulate:VOLTage:LOW query instructs the device to calculate and return a voltage value from the data representing the low state.
1.0
0.8
0.6
0.4
0.2
Low
Examples
Related Commands
0 2 4 6 8 10 12 14 16 18 20
To correctly perform a CALCulate function, a data set must be acquired (INITiate,
ARM, TRIGger), and the data may be transferred to the host (register access) before the execution CALC query. This sequence is not a prerequisite for sending a CALCulate query, but is required for valid data to be returned.
Command / Query Response (Description)
CALC:VOLT:LOW?
CONFigure:VOLTage:LOW
MEASure: VOLTage:LOW
(Returns the low input voltage value.)
VM2601/2/3 Command Dictionary 71
VXI Technology, Inc.
CALCulate:VOLTage:MAXimum?
Purpose
Type
Command Syntax
Returns the maximum voltage value for the acquired data.
Query
None
Command Parameters N/A
*RST Value N/A
Query Syntax
Query Parameters
CALCulate:VOLTage:MAXimum?
None
Query Response
Description
ASCII value representing a voltage measurement in volts.
The CALCulate:VOLTage:MAXimum query instructs the device to calculate and return a maximum voltage value from the acquired data set.
1.0
Maximum
0.8
0.6
0.4
0.2
Examples
Related Commands
0 2 4 6 8 10 12 14 16 18 20
To correctly perform a CALCulate function, a data set must be acquired (INITiate,
ARM, TRIGger), and the data may be transferred to the host (register access) before the execution CALC query. This sequence is not a prerequisite for sending a CALCulate query, but is required for valid data to be returned.
Command / Query Response (Description)
CALC:VOLT:MAX?
CONFigure:VOLTage:MAXimum
MEASure: VOLTage:MAXimum
www.vxitech.com
CALCulate:VOLTage:MEAN?
Purpose
Type
Command Syntax
Returns the mean voltage value for the acquired data.
Query
None
Command Parameters N/A
*RST Value N/A
Query Syntax
Query Parameters
CALCulate:VOLTage:MEAN?
None
Query Response
Description
ASCII value representing a voltage measurement in volts.
The CALCulate:VOLTage:MEAN query instructs the device to calculate and return the mean (average) voltage value from the acquired data set.
To correctly perform a CALCulate function, a data set must be acquired (INITiate,
ARM, TRIGger), and the data may be transferred to the host (register access) before the execution CALC query. This sequence is not a prerequisite for sending a CALCulate query, but is required for valid data to be returned.
Examples
Related Commands
Command / Query
CALC:VOLT:MEAN?
CONFigure:VOLTage:MEAN
MEASure: VOLTage:MEAN
Response (Description)
VM2601/2/3 Command Dictionary 73
VXI Technology, Inc.
CALCulate:VOLTage:MINimum?
Purpose
Type
Command Syntax
Returns the minimum voltage value for the acquired data.
Query
None
Command Parameters N/A
*RST Value N/A
Query Syntax
Query Parameters
CALCulate:VOLTage:MINimum?
None
Query Response
Description
ASCII value representing a voltage measurement in volts.
The CALCulate:VOLTage:MINimum query instructs the device to calculate and return a minimum voltage value from the acquired data set.
1.0
Examples
Related Commands
0.8
0.6
0.4
0.2
Minimum
0 2 4 6 8 10 12 14 16 18 20
To correctly perform a CALCulate function, a data set must be acquired (INITiate,
ARM, TRIGger), and the data may be transferred to the host (register access) before the execution CALC query. This sequence is not a prerequisite for sending a CALCulate query, but is required for valid data to be returned.
Command / Query Response (Description)
CALC:VOLT:MIN?
CONFigure:VOLTage:MINimum
MEASure: VOLTage:MINimum
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CALCulate:VOLTage:NOVershoot?
Purpose
Type
Command Syntax
Returns the negative overshoot value for the acquired data.
Query
None
Command Parameters N/A
*RST Value N/A
Query Syntax
Query Parameters
CALCulate:VOLTage:NOVershoot?
None
Query Response
Description
ASCII value representing a voltage measurement in volts.
The CALCulate:VOLTage:NOVershoot query instructs the device to calculate and return the voltage value corresponding to the negative overshoot from the selected input range. The negative overshoot is defined as the amount of voltage by which a posttransitional aberration negatively exceeds a state boundary.
1.0
0.8
0.6
0.4
0.2
Negative Overshoot
Examples
Related Commands
0 2 4 6 8 10 12 14 16 18 20
To correctly perform a CALCulate function, a data set must be acquired (INITiate,
ARM, TRIGger), and the data may be transferred to the host (register access) before the execution CALC query. This sequence is not a prerequisite for sending a CALCulate query, but is required for valid data to be returned.
Command / Query Response (Description)
CALC:VOLT:NOV?
CONFigure:VOLTage:NOVershoot
MEASure: VOLTage:NOVershoot
(Returns the voltage of the negative overshoot.)
VM2601/2/3 Command Dictionary 75
VXI Technology, Inc.
CALCulate:VOLTage:NPReshoot?
Purpose
Type
Command Syntax
Returns the negative preshoot value for the acquired data.
Query
None
Command Parameters N/A
*RST Value N/A
Query Syntax
Query Parameters
CALCulate:VOLTage:NPReshoot?
None
Query Response
Description
ASCII value representing a voltage measurement in volts.
The CALCulate:VOLTage:NPReshoot query instructs the device to calculate and return a voltage value corresponding to the negative preshoot from the selected input range.
The negative preshoot is defined as the amount of voltage by which a pre-transitional aberration negatively exceeds a state boundary.
1.0
0.8
0.6
Negative Preshoot
0.4
0.2
Examples
Related Commands
0 2 4 6 8 10 12 14 16 18 20
To correctly perform a CALCulate function, a data set must be acquired (INITiate,
ARM, TRIGger), and the data may be transferred to the host (register access) before the execution CALC query. This sequence is not a prerequisite for sending a CALCulate query, but is required for valid data to be returned.
Command / Query Response (Description)
CALC:VOLT:NPR?
CONFigure:VOLTage:NPReshoot
MEASure: VOLTage:NPReshoot
(Returns the negative preshoot voltage.)
www.vxitech.com
CALCulate:VOLTage:NRINging?
Purpose
Type
Command Syntax
Returns the negative ringing measurement of the data being acquired.
Query
None
Command Parameters N/A
*RST Value N/A
Query Syntax
Query Parameters
CALCulate:VOLTage:NRINging?
None
Query Response
Description
ASCII value representing a voltage measurement in volts.
The CALCulate:VOLTage:NRINGing query instructs the device to calculate and return a value corresponding to the negative ringing of an signal on the selected input range.
Negative ringing is defined as the peak-to-peak voltage of a negative post-transitional aberration.
1.0
0.8
0.6
0.4
0.2
Negative
Ringing
Examples
Related Commands
0 2 4 6 8 10 12 14 16 18 20
To correctly perform a CALCulate function, a data set must be acquired (INITiate,
ARM, TRIGger), and the data may be transferred to the host (register access) before the execution CALC query. This sequence is not a prerequisite for sending a CALCulate query, but is required for valid data to be returned.
Command / Query Response (Description)
CALC:VOLT:NRIN? (Returns the value of the negative ringing voltage.)
CONFigure:VOLTage:NRINging
MEASure:VOLTage:NRINging
VM2601/2/3 Command Dictionary 77
VXI Technology, Inc.
CALCulate:VOLTage:POVershoot?
Purpose
Type
Command Syntax
Returns the positive overshoot value for the acquired data.
Query
None
Command Parameters N/A
*RST Value N/A
Query Syntax
Query Parameters
CALCulate:VOLTage:POVershoot?
None
Query Response
Description
ASCII value representing a voltage measurement in volts.
The CALCulate:VOLTage:POVershoot query instructs the device to calculate and return a voltage value corresponding to the positive overshoot from the selected input range.
The positive overshoot is defined as the amount of voltage by which a post-transitional aberration positively exceeds the state boundary.
1.0
Positive Overshoot
0.8
0.6
0.4
0.2
Examples
Related Commands
0 2 4 6 8 10 12 14 16 18 20
To correctly perform a CALCulate function, a data set must be acquired (INITiate,
ARM, TRIGger), and the data may be transferred to the host (register access) before the execution CALC query. This sequence is not a prerequisite for sending a CALCulate query, but is required for valid data to be returned.
Command / Query Response (Description)
CALC:VOLT:POV? (Returns the positive overshoot voltage.)
CONFigure:VOLTage:POVershoot
MEASure: VOLTage:POVershoot
www.vxitech.com
CALCulate:VOLTage:PPReshoot?
Purpose
Type
Command Syntax
Returns the positive preshoot value for the aquried data.
Query
None
Command Parameters N/A
*RST Value N/A
Query Syntax
Query Parameters
CALCulate:VOLTage:PPReshoot?
None
Query Response
Description
ASCII value representing a voltage measurement in volts.
The CALCulate:VOLTage:PPReshoot query instructs the device to calculate and return a voltage value corresponding to the positive preshoot from the selected input range. The positive preshoot is defined as the amount of voltage by which a pre-transitional aberration positively exceeds the state boundary.
1.0
Positive Preshoot
0.8
0.6
0.4
0.2
Examples
Related Commands
0 2 4 6 8 10 12 14 16 18 20
To correctly perform a CALCulate function, a data set must be acquired (INITiate,
ARM, TRIGger), and the data may be transferred to the host (register access) before the execution CALC query. This sequence is not a prerequisite for sending a CALCulate query, but is required for valid data to be returned.
Command / Query Response (Description)
CALC:VOLT:PPR?
CONFigure:VOLTage:PPReshoot
MEASure: VOLTage:PPReshoot
VM2601/2/3 Command Dictionary 79
VXI Technology, Inc.
CALCulate:VOLTage:PRINging?
Purpose
Type
Command Syntax
Returns the positive ringing measurement of the data being acquired.
Query
None
Command Parameters N/A
*RST Value N/A
Query Syntax
Query Parameters
CALCulate:VOLTage:PRINging?
None
Query Response
Description
ASCII value representing a voltage measurement in volts.
The CALCulate:VOLTage:PRINGing query instructs the device to calculate and return a value corresponding to the positive ringing of an signal on the selected input range.
Positive ringing is defined as the peak-to-peak voltage of a positive post-transitional aberration.
1.0
Positive
Ringing
0.8
0.6
0.4
0.2
Examples
Related Commands
0 2 4 6 8 10 12 14 16 18 20
To correctly perform a CALCulate function, a data set must be acquired (INITiate,
ARM, TRIGger), and the data may be transferred to the host (register access) before the execution CALC query. This sequence is not a prerequisite for sending a CALCulate query, but is required for valid data to be returned.
Command / Query Response (Description)
CALC:VOLT:PRIN?
CONFigure:VOLTage:PRINging
MEASure:VOLT:PRINging
(Returns the positive ringing voltage.)
www.vxitech.com
CALCulate:VOLTage:PTPeak?
Purpose
Type
Command Syntax
Returns the peak-to-peak voltage value for the acquired data.
Query
None
Command Parameters N/A
*RST Value N/A
Query Syntax
Query Parameters
CALCulate:VOLTage:PTPeak?
None
Query Response
Description
ASCII value representing a voltage measurement in volts.
The CALCulate:VOLTage:PTPeak query instructs the device to calculate and return a peak-to-peak voltage measurement from the selected input range. The peak-to-peak voltage (V
P-P
) is defined as the voltage measured between the signal’s maximum and minimum points.
1.0
0.8
0.6
0.4
0.2
Peak-to-Peak
Voltage
Examples
Related Commands
0 2 4 6 8 10 12 14 16 18 20
To correctly perform a CALCulate function, a data set must be acquired (INITiate,
ARM, TRIGger), and the data may be transferred to the host (register access) before the execution CALC query. This sequence is not a prerequisite for sending a CALCulate query, but is required for valid data to be returned.
Command / Query Response (Description)
CALC:VOLT:PTP?
CONFigure:VOLTage:PTPeak
MEASure: VOLTage:PTPeak
VM2601/2/3 Command Dictionary 81
VXI Technology, Inc.
CALCulate:VOLTage:RMS?
Purpose
Type
Command Syntax
Returns the root-mean-square (rms) voltage value of the data being acquired.
Query
None
Command Parameters N/A
*RST Value N/A
Query Syntax
Query Parameters
CALCulate:VOLTage:RMS?
None
Query Response
Description
ASCII value representing a voltage measurement in volts.
The CALCulate:VOLTage:RMS query instructs the device to calculate and return the root-mean-square (rms) voltage from the selected input range. The root-mean-square voltage is defined by the following formula:
V rms
=
∑ n − 1 v
0
2 n
, where v = voltage and n = number of samples
Examples
Related Commands
To correctly perform a CALCulate function, a data set must be acquired (INITiate,
ARM, TRIGger), and the data may be transferred to the host (register access) before the execution CALC query. This sequence is not a prerequisite for sending a CALCulate query, but is required for valid data to be returned.
Command / Query Response (Description)
CALC:VOLT:RMS?
CONFigure:VOLTage:RMS
MEASure: VOLTage:RMS
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CALibration:ADC:GAIN
Purpose
Type
Command Syntax
To provide an ADC gain factor for measurement compensation.
Command
CALibration:ADC:GAIN <adc_type>, <adc_gain>
Command Parameters <adc_type> = FAST or SLOW
<adc_gain> = for FAST, 1.15 – 1.35; for SLOW: 1.12 – 1.32
*RST Value
Query Syntax
<adc_gain> = 1.0000
Query Parameters
CALibration:ADC:GAIN <adc_type>
<adc_type> = FAST or SLOW
Query Response
Description
Returns the value currently set for the <adc_gain> parameter for the given <adc_type>.
Sets the gain factor for the indicated ADC. CALibration:ADC:GAIN compensates for gain errors due to component tolerances. This factor is calculated using the following formula:
Gain Factor =
(
2 ×
( cal _ range volts
×
(
× 16 , 383 sample −
) offset
) )
This command is ‘context sensitive’, i.e. it sets the ADC gain factor for the specified
ADC in the currently selected input range.
On the VM2601 , if the IFR input is selected, the only valid value for the <adc_type> parameter is FAST and only one range (±0.5 V) is applicable for the FAST ADC. Note that the IFR input is not installed on the VM2602 and VM2603 .
The valid entries for the <adc_type> parameter are:
FAST
SLOW
Examples
Related Commands
Calibration commands should only be executed by qualified personnel. Changing these values incorrectly can cause the instrument to perform improperly.
Command / Query
CAL:ADC:GAIN 2,1.25
Response (Description)
VM2601/2/3 Command Dictionary 83
VXI Technology, Inc.
CALibration:ADC:OFFSet
Purpose
Type
Command Syntax
To provide an ADC offset value for measurement compensation.
Command
CALibration:ADC:OFFSet <adc_type>, <adc_offset>
Command Parameters <adc_type> = FAST or SLOW
<adc_offset> = 8092 – 8292
*RST Value
Query Syntax
<adc_offset> = 8192
Query Parameters
Query Response
CALibration:ADC:OFFSet? <adc_type>
<adc_type> = FAST, SLOW
Description
Returns the value currently set for the <adc_offset> parameter for the given
<adc_offset>.
Sets the offset value for the indicated ADC. The offset value compensates for offsets in the signal path and converting the raw data from straight binary to signed (twos complement) binary. The offset value is calibrated by applying 0 V to the input and determining the offset required for the measurement to read 0 V:
Offset value ( volts ) =
( sample − offset
)( volts / count
)( gain
)
( range
16 , 383
)
This command is ‘context sensitive’, i.e. it sets the ADC offset factor for the specified
ADC in the currently selected input range.
On the VM2601 , if the IFR input is selected, the only valid value for the <adc_type> parameter is FAST and only one range (±0.5 V) is applicable for the FAST ADC. Note that the IFR input is not installed on the VM2602 and VM2603 .
The valid entries for the <adc_type> parameter are:
FAST
SLOW
Examples
Related Commands
Calibration commands should only be executed by qualified personnel. Changing these values incorrectly can cause the instrument to perform improperly.
Command / Query
CAL:ADC:OFFS 8207
Response (Description)
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CALibration:COUNt?
Purpose
Type
Command Syntax
Tracks the number of times calibration memory has been written.
Query
None
Command Parameters N/A
*RST Value N/A
Query Syntax
Query Parameters
Query Response
CALibration:COUNt?
None
Description
Returns a numeric value from 0 to 16,777,215 (after the maximum value, it will wrap to
0)
The CALibration:COUNt query returns the number of times the CALibration:STORe operation has been performed. This provides some indication of EEPROM wear.
Calibration commands should only be executed by qualified personnel. Changing these values incorrectly can cause the instrument to perform improperly.
Examples
Related Commands
Command / Query
CAL:COUN?
Response (Description)
24 (Returns the number of times the CAL:STOR command has been performed.)
VM2601/2/3 Command Dictionary 85
VXI Technology, Inc.
CALibration:DAC:GAIN
Purpose
Type
Command Syntax
To set the calibration factor that compensates for DAC gain inaccuracies.
Command
CALibration:DAC:GAIN <dac_chan>, <dac_gain>
Command Parameters <dac_chan> = 0 – 5
<dac_gain> = range depends on channel
*RST Value
Query Syntax
<dac_gain> = 1.000 (or Cal Value)
Query Parameters
CALibration:DAC:GAIN? <dac_chan>
<dac_chan> = 0 – 5
Query Response
Description
Returns the value currently set for the <dac_gain> parameter for the given <dac_chan>.
Sets the gain factor for the indicated DAC. CALibration:DAC:GAIN compensates for deviations from the ideal slope for the DAC. Prior to calibration, the <dac_gain> parameter will read “1” after a reset condition. After calibration has been performed, this value changes and is stored in non-volatile memory. When a reset condition occurs after calibration, the value stored in non-volatile memory is returned.
Examples
Related Commands
Calibration commands should only be executed by qualified personnel. Changing these values incorrectly can cause the instrument to perform improperly.
Command / Query
CAL:DAC:GAIN 2,.98
Response (Description)
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CALibration:DAC:OFFSet
Purpose
Type
Command Syntax
To set the calibration factor that compensates for DAC offset inaccuracies
Command
CALibration:DAC:OFFSet <dac_chan>, <dac_offset>
Command Parameters <dac_chan> = 0 - 5
<dac_offset> = approximately 1947 - 2147
*RST Value
Query Syntax
<dac_offs> = 2047 (or Cal Value)
Query Parameters
Query Response
CALibration:DAC:OFFSet <dac_chan>
<dac_chan> = 0 - 5
Description
Returns the value currently set for the <dac_offset> parameter for the given
<dac_chan>.
Sets the offset value for the indicated DAC. The offset value compensates for conversion of data from sine binary to straight binary. Prior to calibration, the
<dac_offs> parameter will read “2047” after a reset condition. After calibration has been performed, this value changes and is stored in non-volatile memory. When a reset condition occurs after calibration, the value stored in non-volatile memory is returned.
Calibration commands should only be executed by qualified personnel. Changing these values incorrectly can cause the instrument to perform improperly.
Examples
Related Commands
Command / Query
CAL:DAC:OFFS 2,1900
Response (Description)
VM2601/2/3 Command Dictionary 87
VXI Technology, Inc.
CALibration:DEFault
Purpose
Type
Command Syntax
Sets all calibration factors to their default values.
Command
CALibration:DEFault
Command Parameters None
*RST Value N/A
Query Syntax
Query Parameters
N/A
N/A
Query Response
Description
N/A
Sets all calibration factors to their default values. The values assumed are as follows:
<adc_gain>: 1.000
<adc_offset>: 8192
<dac_gain>: 1.000
<dac_offset>: 2047
Examples
Related Commands
Calibration commands should only be executed by qualified personnel. Changing these values incorrectly can cause the instrument to perform improperly.
Command / Query
CAL:DEF
Response (Description)
(Resets the ADC and DAC gain and offset settings to thei default/*RST values.)
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CALibration:RESet
Purpose Resets all calibration factors to the values stored in the non-volatile memory
(EEPROM).
Type
Command Syntax
Command Parameters None
*RST Value
Command
CALibration:RESet
N/A
Query Syntax None
Query Parameters N/A
Query Response
Description
N/A
Resets all calibration factors to the values stored in the non-volatile memory
(EEPROM).
Calibration commands should only be executed by qualified personnel. Changing these values incorrectly can cause the instrument to perform improperly.
Examples
Related Commands
Command / Query
CAL:RES
CALibration:DEFault:GAIN
CALibration:DEFault:OFFSet
CALibration:SECure
Response (Description)
(Resets all calibration factors to the values stored in non-volatile memory.)
VM2601/2/3 Command Dictionary 89
VXI Technology, Inc.
CALibration:SECure:CODE
Purpose
Type
Command Syntax
Command Parameters <string> = the code string can be from 1 to 15 ASCII characters in length entered in
IEEE 488.2 definite or indefinite length arbitrary block format.
*RST Value
Query Syntax
Query Parameters
Query Response
Description
Sets the code required to disable calibration security.
Instrument specific command
CALibration:SECure:CODE <string>
None
CALibration:SECure:CODE?
None
Returns the security code in IEEE 488.2 definite block format.
The calibration security code command sets the code required to disable calibration security. Calibration security must first be disabled before the code can be changed.
Definite length arbitrary block format is used to define the <string> parameter. This format contains, essentially, four parts:
# 2 06 VM2601
#1: a pound sign header.
#1 #2 #3 #4
#2: indicates how many digits are used in #3.
#3: indicates the number of characters that are used in #4 (the security code). Valid numbers for the third section are 1 through 15.
#4: the security code. It may be up to 15 characters long and is case sensitive.
Before shipping the instrument, the default security code is the module’s model number (i.e. VM2601, VM2602, or VM2603).
Examples
Related Commands
Calibration commands should only be executed by qualified
personnel. these instrument to perform improperly.
Command / Query
CAL:SEC:CODE #206VM2601
CALibration:SECure:STATe
CALibration:STORe
Response (Description)
(Sets the factory code setting of VM2601)
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CALibration:SECure[:STATe]
Purpose
Type
Command Syntax
Enable or disable calibration security.
Command
CALibration:SECure[:STATe] <boolean> or
CALibration:SECure[:STATe] <boolean>, <string>
Command Parameters <boolean> = 0 | 1 | OFF | ON
<string> = the code string can be from 1 to 15 ASCII characters in length entered in
IEEE 488.2 definite or indefinite length arbitrary block format.
*RST Value
Query Syntax
Query Parameters
Query Response
Description
<boolean> = ON
CALibration:SECure[:STATe]?
None
Returns the value currently selected for the <boolean> parameter
The CALibration:SECurity[:STATe] command enables or disables calibration security.
While security is on, the calibration factors ADC gain, ADC offset, DAC gain and DAC offset cannot be changed. In addition, the CAL:STORe command is disabled, effectively write protecting the non-volatile memory. In order to disable the security state, the security code must be supplied. The factory default security code is VM2601 (see
CALibration:SECure:CODE for more information). To enable security, the code does not need to be supplied. The security state is enabled by default.
Security can also be enabled without entering the <string> parameter by sending the
CALibration:SECure[:STATe] 1 | ON command. Security cannot, however, be disabled using a CALibration:SECure[:STATe] 0 | OFF command. If this command is sent, a
“Missing Parameter” error will be returned.
Calibration commands should only be executed by qualified personnel. Changing these values incorrectly can cause the instrument to perform improperly.
Examples
Related Commands
Command / Query
CAL:SEC:STAT OFF,#206VM2601
CAL:SEC:STAT 1
CAL:SEC:STAT?
CALibration:STORe
Response (Description)
(Disables calibration security.)
(Enables calibration security.)
1 (Indicates that calibration security is enabled.)
VM2601/2/3 Command Dictionary 91
VXI Technology, Inc.
CALibration:STORe
Purpose
Type
Command Syntax
Stores calibration data into non-volatile memory.
Command
CALibration:STORe
Command Parameters None
*RST Value N/A
Query Syntax
Query Parameters
None
N/A
Query Response
Description
N/A
The CALibration:STORe command stores correction data into non-volatile memory.
The correction data is calibration data that has been downloaded via the program messages in the Calibration Data subsystem. The CALibration:STORe command should only be performed after all the correction data has been finalized.
Note : Security must be turned off in order to use this command.
Examples
Related Commands
Calibration commands should only be executed by qualified personnel. Changing these values incorrectly can cause the instrument to perform improperly.
Command / Query
CAL:SEC OFF,#206VM2601
CAL:STOR
CAL:SEC 1
CALibration:COUNt
CALibration:SECure:CODE
CALibration:SECure:STATe
Response (Description)
(Disables calibration security.)
(Stores correction data into non-volatile memory.)
(Enables calibration security.)
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COMBine:FEED
Purpose Sets a marker for specified events allowing for easy reference after acquisition is complete.
Type
Command Syntax
Command
COMBine:FEED <mark_source_1>, <mark_source_2>
Command Parameters <mark_source_1> = GND | GP0 | GP1 | OVR
*RST Value
Query Syntax
<mark_source_2> = GND | GP0 | GP1 | OVR
<mark_source_1> & <mark_source_2> = GND
COMBine:FEED? <mark>
Query Parameters
Query Response
Description
<mark> = 1 | 2
Returns the value currently selected for the <mark_source> for the indicated <mark>
Feeds <mark_source_1> to D14 and <mark_source_2> to D15 with each sample taken during data acquisition. The markers are retrieved with the raw data.
Examples
Related Commands
Command / Query
COMB:FEED GP0,GP1
None
Response (Description)
VM2601/2/3 Command Dictionary 93
VXI Technology, Inc.
CONFigure?
Purpose
Type
Outputs the currently configured measurement.
Query
Command Syntax None
Command Parameters N/A
*RST Value
Query Syntax
Query Parameters
Query Response
Description
PERiod
CONFigure?
None
Outputs the currently configured measurement.
Outputs the currently configured measurement. No configuration information is returned with this query. PERiod is the default setting.
Examples
Related Commands
Command / Query Response (Description)
MEAS:VOLT:RTIM? 0,1024,10,90,5.0 (Takes a rise time measurement between the 10 and 90 percent reference levels)
CONF? RTIM? (Returns the currently configured measurement.)
None
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CONFigure:ADC
Purpose
Type
Selects between the fast and slow ADCs.
Command
Command Syntax CONFigure:ADC <conf_adc>
Command Parameters <conf_adc> = FAST | SLOW | AUTO
*RST Value
Query Syntax
Query Parameters
Query Response
Description
FAST
CONFigure:ADC?
None
Returns the value currently selected for the <conf_adc> parameter
This command selects between the two converters. The fast ADC converts at up to
80 MSa/s for the VM2601, 40 MSa/s for the VM2602, and 20 MSa/s for the VM2603.
The slow ADC converts at up to 10 MSa/s for all three modules. The slow converter provides improved dc accuracy for low-frequency measurements.
When AUTO is selected, the module selects the best converter to be used based upon the sample rate, with the slow converter being used if possible. The following criteria is used to determine which ADC is selected:
If the sample rate is between 4.7 Hz and 1 kHz, then the FAST ADC is selected.
If the sample rate is between 1 kHz and 10 MHz, then the SLOW ADC is selected.
Examples
If the sample rate is between 10 MHz and the maximum ADC rate, then the FAST ADC is selected.
This command only applies to the DSO. The IFR input will always utilize the FAST
ADC (VM2601 only).
Command / Query Response (Description)
CONF:ADC SLOW (Selects the slow ADC)
CONF:ADC? SLOW (Indicates that the slow ADC is selected)
Related Commands None
VM2601/2/3 Command Dictionary 95
VXI Technology, Inc.
CONFigure:FALL:TIMe
Purpose
Type
Defines the fall time parameters that will govern corresponding CALCulate and
MEASure commands.
Command
Command Syntax CONFigure:FALL:TIMe <start_samp>, <#_samp>, <lo_ref>, <hi_ref>, <expected_val> or
CONFigure:FTIMe <start_samp>, <#_samp>, <lo_ref>, <hi_ref>, <expected_val>
Command Parameters <start_samp> = typically 0
<#_samp> = 8 – 16,777,216
<lo_ref> = 0 to 100 (percent). The default is 10% and it must be less than <hi_ref>
<hi_ref> = 0 to 100 (percent). The default is 90% and it must be greater than <lo_ref>
<expected_val> = depends on input
Reset Value <start_samp> = 0
<#_samp> = 1,024
<lo_ref> = 10 (percent)
<hi_ref> = 90 (percent)
Query Syntax
Query Parameters
Query Response
Description
None
N/A
N/A
This command defines the parameters used by the CALCulate:FTIMe query. Fall time is defined as the time interval that occurs between the 90% reference and 10% reference of the signal amplitude.
The parameters for this command are defined as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point, that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
• <#_samp> = indicates the number of samples to be used in the measurement.
• <lo_ref> = fall time ends when a negative transition of the input signal crosses this reference point.
• <hi_ref> = fall time begins when a negative transition of the input signal crosses this reference point.
• <expected_val> = the value that is expected to be returned by the instruement.
Examples Command / Query
CONF:FTIM 0,2048,10,90,x
Response (Description)
Related Commands CALCulate:FALL:TIME?
CALCulate:FTIMe?
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CONFigure:FREQuency
Purpose
Type
Command Syntax
Command Parameters <start_samp> = typically 0
<#_samp> = 8 to 16,777,216
<expected_val> = depends on input
CONFigure:FREQuency <start_samp>, <#_samples>, <expected_val>
Default Value <start_samp> = 0
<#_samp> = 1,024
Query Syntax None
Query Parameters
Query Response
Description
Defines the frequency parameters that will govern corresponding CALCulate and
MEASure commands.
Command
N/A
N/A
This command defines the parameters used by the CALCulate:FREQuency query.
Frequency ( f ) is a measure of how often a signal repeats in one second (1/s = Hz). This is also equal to 1/period (or 1/T).
Examples
The parameters for this command are defined as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point,
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = the value that is expected to be returned by the instruement. that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
Command / Query Response (Description)
CONF:FREQ 0,65536,x
Related Commands CALCulate:FREQuency?
VM2601/2/3 Command Dictionary 97
VXI Technology, Inc.
CONFigure:HORizontal:RESolution
Purpose
Type
Command Syntax
Command Parameters <hrz_reso> = 12.5 ns/Sa – 209.7 ms/Sa (Fast ADC)
100 ns/Sa – 1 ms/Sa (Slow ADC)
*RST Value
Query Syntax
Query Parameters
Query Response
Description
Sets the sample period for the ADC.
Command
CONFigure:HORizontal:RESolution <hrz_reso>
100 ns/Sa for both the Fast and Slow ADC
CONFigure:HORizontal:RESolution?
None
Returns the value currently selected for the <hrz_reso> parameter.
Sets the sample period (period = 1/rate). The minimum and maximum sample times for each ADC type are defined below:
FAST ADC
Minimum = 1 / SR
MAX
= 12.5 ns/sample for the VM2601
= 25 ns/sample for the VM2602
= 50 ns/sample for the VM2603
Maximum = 16,777,216 / SR
MAX
= 209.7 ms/sample
= 419.4 ms/sample
= 838.8 ms/sample
Where SR
MAX
is the maximum sample rate for module being used.
SLOW ADC
Minimum = 100 ns/sample (1 / 10 MHz)
Maximum = 1 ms/sample (10,000 /10 MHz)
Examples Command / Query
CONF:HOR RES 25.0e-9
Response (Description)
(Sets the sample rate to 25 ns/Sa)
CONF:HOR:RES? 2.500000000000000e-08
(Indicates that the sample rate for the ADC is
25 ns/Sa)
Related Commands
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CONFigure:NDUTy
Purpose
Type
Query Syntax
Query Parameters
Query Response
Description
Defines the negative duty cycle parameters that will govern corresponding CALCulate and MEASure commands.
Command
Command Syntax CONFigure:NDUTy <start_samp>, <#_samp>, <ref_level>, <expected_val>
Command Parameters <start_samp> = typically 0
<#_samp> = 0 to 16,777,216
<ref_level> = 0 to 100 (percent)
<expected_val> = the expected cycle time of the input signal.
Default Value <start_samp> = 0
<#_samp> = 1,024
<ref_level> = 50 (percent)
None
N/A
N/A
This command defines the parameters used by the CALCulate:NDUTy query. A negative duty cycle is defined as the negative pulse width divided by the period and is expressed as a percentage.
The parameters for this command are defined as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point, that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
• <#_samp> = indicates the number of samples to be used in the measurement.
• <ref_level> = sets the reference point. Negative pulse width is the amount of time between one negative transition crossing this reference and the subsequent positive transition across this reference.
• <expected_val> = the value that is expected to be returned by the instruement.
Examples Command / Query
CONF:NDUT 0,2048,50,x
Response (Description)
Related Commands CALCulate:NDUTy?
VM2601/2/3 Command Dictionary 99
VXI Technology, Inc.
CONFigure:NWIDth
Purpose
Type
Query Syntax
Query Parameters
Query Response
Description
Defines the negative pulse width parameters that will govern corresponding CALCulate and MEASure commands.
Command
Command Syntax CONFigure:NWID <start_samp>, <#_samp>, <ref_level>, <expected_val>
Command Parameters <start_samp> = typically 0
<#_samp> = 8 to 16,777,216
<ref_level> = 0 to 100 (percent)
<expected_val> = the expected cycle time of the input signal
Default Value <start_samp> = 0
<#_samp> = 1,024
<ref_level> = 50 (percent)
None
N/A
N/A
This command defines the parameters used by the CALCulate:NWIDth query. The negative pulse width is a measure of the time required to go from the 50% reference of the falling edge of one wave to the 50% reference of the next rising edge.
The parameters for this command are defined as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point, that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
• <#_samp> = indicates the number of samples to be used in the measurement.
• <ref_level> = sets the reference point. Negative pulse width is the amount of time between one negative transition crossing this reference and the subsequent positive transition across this reference.
• <expected_val> = the value that is expected to be returned by the instruement.
Examples Command / Query
CONF:NWID 0,262144,50,x
Response (Description)
Related Commands CALCulate:NWIDth?
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CONFigure:PDUTy
Purpose
Type
Query Syntax
Query Parameters
Query Response
Description
Defines the positive duty cycle parameters that will govern corresponding CALCulate and MEASure commands.
Command
Command Syntax CONFigure:PDUTy <start_samp>, <#_samp>, <ref_level>, <expected_val>
Command Parameters <start_samp> = typically 0
<#_samp> = 0 to 16,777,216
<ref_level> = 0 to 100 (percent)
<expected_val> = the expected cycle time of the input signal
Default Value <start_samp> = 0
<#_samp> = 1,024
<ref_level> = 50 (percent)
None
N/A
N/A
This command defines the parameters used by the CALCulate:PDUTy query. A positive duty cycle is defined as the positive pulse width divided by the period and is expressed as a percentage.
The parameters for this command are defined as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point, that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
• <#_samp> = indicates the number of samples to be used in the measurement.
• <ref_level> = sets the reference point. Positive pulse width is the amount of time between one positive transition crossing this reference and the subsequent negative transition across this reference.
• <expected_val> = the value that is expected to be returned by the instruement.
Examples Command / Query
CONF:PDUT 100,1024,50,x
Response (Description)
Related Commands CALCulate:PDUTy?
VM2601/2/3 Command Dictionary 101
VXI Technology, Inc.
CONFigure:PERCent:NOVershoot
Purpose
Type
Command Syntax
Command Parameters <start_samp> = typically 0
<#_samp> = 0 to to 16,777,216
<expected_val> = depends on input
CONFigure:PERCent:NOVershoot <start_samp>, <#_samples>, <expected_val>
Default Value <start_samp> = 0
<#_samp> = 1,024
Query Syntax None
Query Parameters
Query Response
Description
Defines the negative overshoot parameters that will govern corresponding CALCulate and MEASure commands.
Command
N/A
N/A
This command defines the parameters used by the CALCulate:PERCent:NOVershoot query. The negative overshoot is defined as the amount of voltage by which a posttransitional aberration negatively exceeds a state boundary.
Examples
The parameters for this command are defined as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point,
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = the expected peak-to-peak signal voltage (if sent). that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
Command / Query Response (Description)
CONF:PERC:NOV 0,65536,x
Related Commands CALCulate: PERC:NOV?
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CONFigure:PERCent:NPReshoot
Purpose
Type
Command Syntax
Command Parameters <start_samp> = typically 0
<#_samp> = 0 to to 16,777,216
<expected_val> = depends on input
CONFigure:PERCent:NPReshoot <start_samp>, <#_samples>, <expected_val>
Default Value <start_samp> = 0
<#_samp> = 1,024
Query Syntax None
Query Parameters
Query Response
Description
Defines the negative preshoot parameters that will govern corresponding CALCulate and MEASure commands.
Command
N/A
N/A
This command defines the parameters used by the CALCulate:VOLTage:NPReshoot query. The negative preshoot is defined as the amount of voltage by which a posttransitional aberration negatively exceeds a state boundary.
Examples
The parameters for this command are defined as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point,
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = the expected peak-to-peak signal voltage (if sent). that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
Command / Query Response (Description)
CONF:PERC:NPR 100,1024,50,x
Related Commands CALCulate: PERC:NPR?
VM2601/2/3 Command Dictionary 103
VXI Technology, Inc.
CONFigure:PERCent:NRINging
Purpose
Type
Command Syntax
Command Parameters <start_samp> = typically 0
<#_samp> = 0 to to 16,777,216
<expected_val> = depends on input
CONFigure:VOLT:NRINging <start sample>,<#_samp>,<expected value>
Default Value <start_samp> = 0
<#_samp> = 1,024
Query Syntax None
Query Parameters
Query Response
Description
Defines the negative ring parameters that will govern corresponding CALCulate and
MEASure commands.
Command
N/A
N/A
This command defines the parameters used by the CALCulate:PERC:NRINging query.
Negative ringing is defined as the peak-to-peak voltage of a negative post-transitional aberration.
Examples
The parameters for this command are defined as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point,
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = the expected peak-to-peak signal voltage (if sent). that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
Command / Query Response (Description)
CONF:PERC:NRIN 0,524288,x
Related Commands CALCulate:PERC:NRIN?
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CONFigure:PERCent:POVershoot
Purpose
Type
Command Syntax
Command Parameters <start_samp> = typically 0
<#_samp> = 0 to to 16,777,216
<expected_val> = depends on input
CONFigure:PERCent:POVershoot <start_samp>, <#_samples>, <expected_val>
Default Value <start_samp> = 0
<#_samp> = 1,024
Query Syntax None
Query Parameters
Query Response
Description
Defines the positive overshoot parameters that will govern corresponding CALCulate and MEASure commands.
Command
N/A
N/A
This command defines the parameters used by the CALCulate:PERCent:POVershoot query. The positive overshoot is defined as the amount of voltage by which a posttransitional aberration negatively exceeds a state boundary.
Examples
The parameters for this command are defined as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point,
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = the expected peak-to-peak signal voltage (if sent). that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
Command / Query Response (Description)
CONF:PERC:POV 0,524288,x
Related Commands CALCulate:PERC:POV?
VM2601/2/3 Command Dictionary 105
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CONFigure:PERCent:PPReshoot
Purpose
Type
Command Syntax
Command Parameters <start_samp> = typically 0
<#_samp> = 0 to to 16,777,216
<expected_val> = depends on input
CONFigure:PERCent:PPReshoot <start_samp>, <#_samples>, <expected_val>
Default Value <start_samp> = 0
<#_samp> = 1,024
Query Syntax None
Query Parameters
Query Response
Description
Defines the positive preshoot parameters that will govern corresponding CALCulate and
MEASure commands.
Command
N/A
N/A
This command defines the parameters used by the CALCulate:PERCent:PPReshoot query. The positive preshoot is defined as the amount of voltage by which a posttransitional aberration negatively exceeds a state boundary.
Examples
The parameters for this command are defined as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point,
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = the expected peak-to-peak signal voltage (if sent). that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
Command / Query Response (Description)
CONF:VOLT:PPR 0,524288,x
Related Commands CALCulate:PERCent:PPReshoot?
www.vxitech.com
CONFigure:PERCent:PRINging
Purpose
Type
Command Syntax
Command Parameters <start_samp> = typically 0
<#_samp> = 0 to to 16,777,216
<expected_val> = depends on input
CONFigure:VOLT:PRINging <start sample>,<#_samp>,<expected value>
Default Value <start_samp> = 0
<#_samp> = 1,024
Query Syntax None
Query Parameters
Query Response
Description
Defines the positive ring parameters that will govern corresponding CALCulate and
MEASure commands.
Command
N/A
N/A
This command defines the parameters used by the CALCulate:PERC:NRINging query.
Positive ringing is defined as the peak-to-peak voltage of a positive post-transitional aberration.
Examples
The parameters for this command are defined as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point,
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = the expected peak-to-peak signal voltage (if sent). that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
Command / Query Response (Description)
CONF:PERC:PRIN 0,524288,x
Related Commands CALCulate:PERCent::PRINging?
VM2601/2/3 Command Dictionary 107
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CONFigure:PERiod
Purpose
Type
Command Syntax
Command Parameters <start_samp> = typically 0
<#_samp> = 0 to 16,777,216
<expected_val> = depends on input
CONFigure:PERiod <start_samp>, <#_samples>, <expected_val>
Default Value <start_samp> = 0
<#_samp> = 1,024
Query Syntax None
Query Parameters
Query Response
Description
Defines the period parameters that will govern corresponding CALCulate and MEASure commands.
Command
N/A
N/A
This command defines the parameters used by the CALCulate:PERiod query. The period (T) of a function is defined as the amount of time required for the signal to generate one signal cycle. This is also defined as 1/frequency (or 1/ f ).
Examples
The parameters for this command are defined as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point,
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = the value that is expected to be returned by the instruement. that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
Command / Query Response (Description)
CONF:PER 0,256,x
Related Commands CALCulate:PERiod?
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CONFigure:PWIDth
Purpose
Type
Query Syntax
Query Parameters
Query Response
Description
Defines the positive pulse width parameters that will govern corresponding CALCulate and MEASure commands.
Command
Command Syntax CONFigure:PWIDth <start_samp>, <#_samp>, <ref_level>, <expected_val>
Command Parameters <start_samp> = typically 0
<#_samp> = 0 to 16,777,216
<ref_level> = 0 to 100 (percent)
<expected_val> = the expected cycle time of the input signal
Default Value <start_samp> = 0
<#_samp> = 1,024
<ref_level> = 50 (percent)
None
N/A
N/A
This command defines the parameters used by the CALCulate:PWIDth query. The positive pulse width is a measure of the time required to go from the 50% reference of the rising edge of one wave to the 50% reference of the next falling edge.
The parameters for this command are defined as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point, that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
• <#_samp> = indicates the number of samples to be used in the measurement.
• <ref_level> = sets the reference point. Positive pulse width is the amount of time between one positive transition crossing this reference and the subsequent negative transition across this reference.
• <expected_val> = the value that is expected to be returned by the instruement.
Examples Command / Query
CONF:PWID 0,16384,50,x
Response (Description)
Related Commands CALCulate:PWIDth?
VM2601/2/3 Command Dictionary 109
VXI Technology, Inc.
CONFigure:RISE:TIMe
Purpose
Type
Defines the rise time parameters that will govern corresponding CALCulate and
MEASure commands.
Command
Command Syntax CONFigure:RISE:TIMe <start_samp>, <#_samp>, <lo_ref>, <hi_ref>, <expected_val> or
CONFigure:RTIMe <start_samp>, <#_samp>, <lo_ref>, <hi_ref>, <expected_val>
Command Parameters <start_samp> = typically 0
<#_samp> = 0 to 16,777,216
<lo_ref> = 0 to 100 (percent). The default is 10% and it must be less than <hi_ref>
<hi_ref> = 0 to 100 (percent). The default is 90% and it must be greater than <lo_ref>
<expected_val> = depends on input
Default Value <start_samp> = 0
<#_samp> = 1,024
<lo_ref> = 10 (percent)
<hi_ref> = 90 (percent)
Query Syntax
Query Parameters
Query Response
Description
None
N/A
N/A
This command defines the parameters used by the CALCulate:RISE:TIMe query. Rise time is defined as the time interval that occurs between the 10% reference and 90% reference of the peak value.
The parameters for this command are defined as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point, that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
• <#_samp> = indicates the number of samples to be used in the measurement.
• <lo_ref> = rise time begins when a positive transition of the input signal crosses this reference point.
• <hi_ref> = rise time ends when a positive transition of the input signal crosses this reference point.
• <expected_val> = the value that is expected to be returned by the instruement.
Examples Command / Query
CONF:RTIM 0,16384,10,90,x
Response (Description)
Related Commands CALCulate:RTIMe?
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CONFigure:SAR:TIMe
Purpose Configures the signal aberration region (SAR) size in seconds.
Type
Command Syntax CONFiguire:SAR:TIME <sar_time>
Command Parameters <sar_time> cannot be greater than the duration of the transition state.
Default Value
Query Syntax
Query Parameters
Query Response
Description
<sar_time> = -1
CONFigure:SAR:TIMe?
None
Returns the value of the SAR size. If “-1.0” is returned, this indicates that the SAR time is set to three times the transition time.
This command defines the duration of the signal aberration region (SAR) size in seconds. This region is defined as the time required for a signal to settle between its
<hi_ref> level (90% default) and high state during a rise time measurement. Conversely, it is defined as the time required for a signal to settle between its <lo_ref> level (10% default) and its low state during a fall time measurement. By default, this value is set to
“-1”, which indicates that the SAR time is equal to three times the the duration of the transition state.
SAR Time
1.0
1.0
High State
90% reference
0.8
0.8
0.6
Examples
Related Commands
0.4
0.2
0 2 4 6
Command / Query
CONF:SAR:TIM 0.001
CONF:SAR:TIM?
8 10 12 14 16
0.6
0.4
10% reference
0.2
0 2 4
SAR Time
6 8 10
Low State
12 14 16
Response (Description)
(Configures the SAR time to be 0.001 s.)
VM2601/2/3 Command Dictionary 111
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CONFigure:SAR:TIMe?
Purpose
Type
Queries and returns the signal aberration region (SAR) size in seconds.
Query
Command Syntax N/A
Command Parameters N/A
Default Value
Query Syntax
Query Parameters
Query Response
Description
-1
CONFigure:SAR:TIMe?
This query returns the Signal Aberration Region (SAR) size in seconds. A return value of -1.0 indicates the SAR time is set to its default value of 3 times the transition time.
(See CONFigure:SAR:TIMe for more information).
Examples
Related Commands
Command / Query
CONF:SAR:TIM?
CONF:SAR:TIM
Response (Description)
0.001
(Indicates that the SAR time is set to 0.001 s.)
www.vxitech.com
CONFigure:VOLTage:AMPLitude
Purpose
Type
Command Syntax
Command Parameters <start_samp> = typically 0
<#_samp> = 0 to 16,777,216
<expected_val> = depends on input
CONFigure:VOLTage:AMPLitude <start_samp>, <#_samples>, <expected_val>
Default Value <start_samp> = 0
<#_samp> = 1,024
Query Syntax None
Query Parameters
Query Response
Description
Defines the amplitude parameters that will govern corresponding CALCulate and
MEASure commands.
Command
N/A
N/A
This command defines the parameters used by the CALCulate:VOLTage:AMPlitude query. Amplitude is defined as the voltage difference between the high and low states.
Examples
The parameters for this command are defined as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point, that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = the value that is expected to be returned by the instruement.
Command / Query Response (Description)
CONF:VOLT:AMPL 0,65536,x
Related Commands CALCulate:VOLTage:AMPLitude?
VM2601/2/3 Command Dictionary 113
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CONFigure:VOLTage:HIGH
Purpose
Type
Command Syntax
Command Parameters <start_samp> = typically 0
<#_samp> = 0 to to 16,777,216
<expected_val> = depends on input
CONFigure:VOLTage:HIGH <start_samp>, <#_samples>, <expected_val>
Default Value <start_samp> = 0
<#_samp> = 1,024
Query Syntax None
Query Parameters
Query Response
Description
Defines the high voltage parameters that will govern corresponding CALCulate and
MEASure commands.
Command
N/A
N/A
This command defines the parameters used by the CALCulate:VOLTage:HIGH query.
The volgate high defines the high state of the data.
Examples
The parameters for this command are defined as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point, that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = the value that is expected to be returned by the instruement.
Command / Query Response (Description)
CONF:VOLT:HIGH 0,65536,x
Related Commands CALCulate:VOLTage:HIGH?
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CONFigure:VOLTage:LOW
Purpose
Type
Command Syntax
Command Parameters <start_samp> = typically 0
<#_samp> = 0 to to 16,777,216
<expected_val> = depends on input
CONFigure:VOLTage:LOW <start_samp>, <#_samples>, <expected_val>
Default Value <start_samp> = 0
<#_samp> = 1,024
Query Syntax None
Query Parameters
Query Response
Description
Defines the low voltage parameters that will govern corresponding CALCulate and
MEASure commands.
Command
N/A
N/A
This command defines the parameters used by the CALCulate:VOLTage:LOW query.
The volgate low defines the low state of the data.
Examples
The parameters for this command are defined as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point, that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = the value that is expected to be returned by the instruement.
Command / Query Response (Description)
CONF:VOLT:LOW 500,32768,x
Related Commands CALCulate:VOLTage:LOW?
VM2601/2/3 Command Dictionary 115
VXI Technology, Inc.
CONFigure:VOLTage:MAXimum
Purpose
Type
Command Syntax
Command Parameters <start_samp> = typically 0
<#_samp> = 0 to to 16,777,216
<expected_val> = depends on input
CONFigure:VOLTage:MAXimum <start_samp>, <#_samples>, <expected_val>
Default Value <start_samp> = 0
<#_samp> = 1,024
Query Syntax None
Query Parameters
Query Response
Description
Defines the maximum voltage parameters that will govern corresponding CALCulate and MEASure commands.
Command
N/A
N/A
This command defines the parameters used by the CALCulate:VOLTage:MAXimum query.
Examples
The parameters for this command are defined as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point, that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = the value that is expected to be returned by the instruement.
Command / Query Response (Description)
CONF:VOLT:MAX 0,32768,x
Related Commands CALCulate:VOLTage:MAXimum?
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CONFigure:VOLTage:MEAN
Purpose
Type
Command Syntax
Command Parameters <start_samp> = typically 0
<#_samp> = 0 to to 16,777,216
<expected_val> = depends on input
CONFigure:VOLTage:MEAN <start_samp>, <#_samples>, <expected_val>
Default Value <start_samp> = 0
<#_samp> = 1,024
Query Syntax None
Query Parameters
Query Response
Description
Defines the mean voltage parameters that will govern corresponding CALCulate and
MEASure commands.
Command
N/A
N/A
This command defines the parameters used by the CALCulate:VOLTage:MEAN query.
The parameters for this command are defined as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point, that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = the value that is expected to be returned by the instruement.
Examples Command / Query Response (Description)
Related Commands
CONF:VOLT:MEAN 0,131072,x
CALCulate:VOLTage:MEAN?
VM2601/2/3 Command Dictionary 117
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CONFigure:VOLTage:MINimum
Purpose
Type
Command Syntax
Command Parameters <start_samp> = typically 0
<#_samp> = 0 to to 16,777,216
<expected_val> = depends on input
CONFigure:VOLTage:MINimum <start_samp>, <#_samples>, <expected_val>
Default Value <start_samp> = 0
<#_samp> = 1,024
Query Syntax None
Query Parameters
Query Response
Description
Defines the minimum voltage parameters that will govern corresponding CALCulate and MEASure commands.
Command
N/A
N/A
This command defines the parameters used by the CALCulate:VOLTage:MINimum query.
Examples
The parameters for this command are defined as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point, that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = the value that is expected to be returned by the instruement.
Command / Query Response (Description)
CONF:VOLT:MIN 0,65536,x
Related Commands CALCulate:VOLTage:MINimum?
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CONFigure:VOLTage:NOVershoot
Purpose
Type
Command Syntax
Command Parameters <start_samp> = typically 0
<#_samp> = 0 to to 16,777,216
<expected_val> = depends on input
CONFigure:VOLTage:NOVershoot <start_samp>, <#_samples>, <expected_val>
Default Value <start_samp> = 0
<#_samp> = 1,024
Query Syntax None
Query Parameters
Query Response
Description
Defines the negative overshoot parameters that will govern corresponding CALCulate and MEASure commands.
Command
N/A
N/A
This command defines the parameters used by the CALCulate:VOLTage:NOVershoot query. The negative overshoot is defined as the amount of voltage by which a posttransitional aberration negatively exceeds a state boundary.
Examples
The parameters for this command are defined as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point,
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = the value that is expected to be returned by the instruement. that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
Command / Query Response (Description)
CONF:VOLT:NOV 0,65536,x
Related Commands CALCulate:VOLTage:NOVershoot?
VM2601/2/3 Command Dictionary 119
VXI Technology, Inc.
CONFigure:VOLTage:NPReshoot
Purpose
Type
Command Syntax
Command Parameters <start_samp> = typically 0
<#_samp> = 0 to to 16,777,216
<expected_val> = depends on input
CONFigure:VOLTage:NPReshoot <start_samp>, <#_samples>, <expected_val>
Default Value <start_samp> = 0
<#_samp> = 1,024
Query Syntax None
Query Parameters
Query Response
Description
Defines the negative preshoot parameters that will govern corresponding CALCulate and MEASure commands.
Command
N/A
N/A
This command defines the parameters used by the CALCulate:VOLTage:NPReshoot query. The negative preshoot is defined as the amount of voltage by which a posttransitional aberration negatively exceeds a state boundary.
Examples
The parameters for this command are defined as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point,
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = the value that is expected to be returned by the instruement. that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
Command / Query Response (Description)
CONF:VOLT:NPR 1000,65536,x
Related Commands CALCulate:VOLTage:NPReshoot?
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CONFigure:VOLTage:NRINging
Purpose
Type
Command Syntax
Command Parameters <start_samp> = typically 0
<#_samp> = 8 – 16,777,216
<expected_val> = depends on input
CONFigure:VOLTage:NRINging <start_samp>, <#_samples>, <expected_val>
Default Value <start_samp> = 0
<#_samp> = 1,024
Query Syntax None
Query Parameters
Query Response
Description
Defines the fall time parameters that will govern corresponding CALCulate and
MEASure commands.
Command
N/A
N/A
This command defines the parameters used by the CALCulate:VOLTage:NRINging query. Negative ringing is defined as the peak-to-peak voltage of a negative posttransitional aberration.
Examples
The parameters for this command are defined as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point,
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = expected peak-to-peak signal voltage (if sent). that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
Command / Query Response (Description)
CONF:VOLT:NRIN 64,2048,
Related Commands CALCulate:VOLTage:NRINging?
VM2601/2/3 Command Dictionary 121
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CONFigure:VOLTage:POVershoot
Purpose
Type
Command Syntax
Command Parameters <start_samp> = typically 0
<#_samp> = 0 to to 16,777,216
<expected_val> = depends on input
CONFigure:VOLTage:POVershoot <start_samp>, <#_samples>, <expected_val>
Default Value <start_samp> = 0
<#_samp> = 1,024
Query Syntax None
Query Parameters
Query Response
Description
Defines the positive overshoot parameters that will govern corresponding CALCulate and MEASure commands.
Command
N/A
N/A
This command defines the parameters used by the CALCulate:VOLTage:POVershoot query. The positive overshoot is defined as the amount of voltage by which a posttransitional aberration negatively exceeds a state boundary.
Examples
The parameters for this command are defined as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point,
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = the value that is expected to be returned by the instruement. that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
Command / Query Response (Description)
CONF:VOLT:POV 0,524288,x
Related Commands CALCulate:VOLTage:POVershoot?
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CONFigure:VOLTage:PPReshoot
Purpose
Type
Command Syntax
Command Parameters <start_samp> = typically 0
<#_samp> = 0 to to 16,777,216
<expected_val> = depends on input
CONFigure:VOLTage:PPReshoot <start_samp>, <#_samples>, <expected_val>
Default Value <start_samp> = 0
<#_samp> = 1,024
Query Syntax None
Query Parameters
Query Response
Description
Defines the positive preshoot parameters that will govern corresponding CALCulate and
MEASure commands.
Command
N/A
N/A
This command defines the parameters used by the CALCulate:VOLTage:PPReshoot query. The positive preshoot is defined as the amount of voltage by which a posttransitional aberration negatively exceeds a state boundary.
Examples
The parameters for this command are defined as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point,
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = the value that is expected to be returned by the instruement. that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
Command / Query Response (Description)
CONF:VOLT:PPR 0,524288,x
Related Commands CALCulate:VOLTage:PPReshoot?
VM2601/2/3 Command Dictionary 123
VXI Technology, Inc.
CONFigure:VOLTage:PRINging
Purpose
Type
Command Syntax
Command Parameters <start_samp> = typically 0
<#_samp> = 8 – 16,777,216
<expected_val> = depends on input
CONFigure:VOLTage:PRINging <start_samp>, <#_samples>, <expected_val>
Default Value <start_samp> = 0
<#_samp> = 1,024
Query Syntax None
Query Parameters
Query Response
Description
Defines the fall time parameters that will govern corresponding CALCulate and
MEASure commands.
Command
N/A
N/A
This command defines the parameters used by the CALCulate:VOLTage:NRINging query. Positive ringing is defined as the peak-to-peak voltage of a positive posttransitional aberration.
Examples
The parameters for this command are defined as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point,
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = expected peak-to-peak signal voltage (if sent). that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
Command / Query Response (Description)
CONF:VOLT:PRIN 64,2048,
Related Commands CALCulate:VOLTage:PRINging?
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CONFigure:VOLTage:PTPeak
Purpose
Type
Command Syntax
Command Parameters <start_samp> = typically 0
<#_samp> = 0 to to 16,777,216
<expected_val> = depends on input
CONFigure:VOLTage:PTPeak <start_samp>, <#_samples>, <expected_val>
Default Value <start_samp> = 0
<#_samp> = 1,024
Query Syntax None
Query Parameters
Query Response
Description
Defines the peak-to-peak voltage parameters that will govern corresponding CALCulate and MEASure commands.
Command
N/A
N/A
This command defines the parameters used by the CALCulate:VOLTage:PTPeak query.
The peak-to-peak voltage (V p-p
) is defined as the voltage measured between the signal’s maximum and minimum points.
Examples
The parameters for this command are defined as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point,
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = the value that is expected to be returned by the instruement. that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
Command / Query Response (Description)
CONF:VOLT:PTP 0,1048576,x
Related Commands CALCulate:VOLTage:PTPeak?
VM2601/2/3 Command Dictionary 125
VXI Technology, Inc.
CONFigure:VOLTage:RMS
Purpose
Type
Command Syntax
Command Parameters <start_samp> = typically 0
<#_samp> = 0 to to 16,777,216
<expected_val> = depends on input
CONFigure:VOLTage:RMS <start_samp>, <#_samples>, <expected_val>
Default Value <start_samp> = 0
<#_samp> = 1,024
Query Syntax None
Query Parameters
Query Response
Description
Defines the root-mean-square voltage parameters that will govern corresponding
CALCulate and MEASure commands.
Command
N/A
N/A
This command defines the parameters used by the CALCulate:VOLTage:PTP query.
The root-mean-square voltage is defined by the following formula:
V rms
=
∑ n − 1 v
0
2 n
, where v = voltage and n = number of samples
Examples
Related Commands
The parameters for this command are defined as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point,
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = the value that is expected to be returned by the instruement. that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
Command / Query Response (Description)
CONF:VOLT:RMS 0,8192,x
CALCulate:VOLTage:RMS?
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CONTrol:IPOWer?
Purpose
Type
This command applies power to or removes power from the instrument.
Setting
Command Syntax CONTrol:IPOWer <boolean>
Command Parameters <boolean> = 0 | 1 | OFF | ON
*RST Value
Query Syntax
Query Parameters
Query Response
Description
ON
CONTrol:IPOWer?
None
0 | 1
This command applies power to or removes power from the instrument.c
Note that, following a power off/power on cycle, a five second period of time exists where the instrument cannot be used. This interval allows the instrument to complete the process of initialization.
Examples
Related Commands
Command / Query
CONT:IPOW 1
CONT:IPOW 1
None
Response (Description)
(Turns the instrument power ON)
1 (Indicates that instrument power is ON)
VM2601/2/3 Command Dictionary 127
VXI Technology, Inc.
FETCh?
Purpose
Type
Retrieves the measurements taken by the INITiate command and places it in the output buffer.
Query
Command Syntax None
Command Parameters None
*RST Value
Query Syntax
Query Parameters
Query Response
Description
None
FETCh?
None
Returns the measurements taken by a previously performed INITiate command.
Retrieves the measurements taken by the INITiate command and places it in the output buffer.
Examples
Related Commands
Command / Query
FETC?
Response (Description)
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INITiate:DELay
Purpose
Type
Sets the pre-trigger count.
Event
Command Syntax INITiate:DELay <delay_count>
Command Parameters <delay_count> = 0 – 17,179,869,184
*RST Value
Query Syntax
Query Parameters
Query Response
Description
<delay_count> = 1,024
INITiate:DELay?
N/A
Returns the value currently selected for the <delay_count> parameter
The INITiate:DELay command sets the pre-trigger count. This defines the number of samples that must be acquired before the digitizer can be triggered. The maximum pretrigger count is:
[MEMORY SIZE] – [POST TRIGGER COUNT] where MEMORY SIZE is 16,777,216 samples (small memory) or 33,554,432 samples
(optional large memory.)
Examples Command / Query
INIT:DEL 7.5e5
INIT:DEL?
Response (Description)
(Sets the pre-trigger sample count to 750,000.)
7.5e5
(Indicates that the pre-trigger sample count is set to 750,000.)
Related Commands ABORt
SWEep:POINts
VM2601/2/3 Command Dictionary 129
VXI Technology, Inc.
INITiate[:IMMediate]
Purpose
Type
Transitions the instrument from the “initiated” state to the “waiting for arm” state.
Event
Command Syntax INITiate[:IMMediate]
Command Parameters None
*RST Value
Query Syntax
Query Parameters
Query Response
Description
N/A
N/A
N/A
N/A
Transitions the instrument from the “initiated” state to the “waiting for arm” state of the
SCPI ARM-TRIGger model.
Examples
Related Commands
Command / Query
INIT
ABORt
Response (Description)
(Arms the VM2601)
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INPut:COUPling
Purpose
Type
Selects ac or dc coupling on the specified input channel.
Command
Command Syntax INPut:COUPling <input_coup>
Command Parameters <input_coup> = ac | dc
*RST Value
Query Syntax
Query Parameters
Query Response
Description
<input_coup> = dc
INPut:COUPling?
None ac | dc
Selects ac or dc coupling on the specified input channel. This command only applies to the DSO input, as the IFR input is always dc coupled.
Note, the IFR input is only available on the VM2601 ..
Examples
Related Commands
Command / Query
INP:COUP AC
INP:COUP?
INPut:IMPedance
Response (Description)
(Sets the input coupling to ac)
AC (Indicates that input coupling is set to ac)
VM2601/2/3 Command Dictionary 131
VXI Technology, Inc.
INPut:FILTer:FREQuency
Purpose
Type
Selects the low-pass filter corner frequency for the specified channel.
Command
Command Syntax INPut:FILTer:FREQuency <filt_freq>
Command Parameters <filt_freq> = 20e6 | 40e6 (VM2601)
10e6 | 20e6 (VM2602)
5e6 | 10e6 (VM2603)
*RST Value
Query Syntax
Query Parameters
Query Response
Description
20e6 (VM2601) or 10e6 (VM2602) or 5e6 (VM2603)
INPut:FILTer:FREQuency?
None
Returns the value of the <filt_freq> parameter.
Selects the low-pass filter corner frequency for the specified channel. The selectable values are 20 MHz or 40 MHz.
NOTE : This command only applies to the DSO input.
Examples
Related Commands
Command / Query
INP:FILT:FREQ 20e6
INP:FILT:FREQ?
INPut:FILTer:STATe
Response (Description)
(Selects the 20 MHz input filter)
20e6 (Indicates that the 20 MHz input filter is selected)
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INPut:FILTer:STATe
Purpose
Type
For the specified input channel, turns the currently selected low-pass filter ON or OFF.
Command
Command Syntax INPut:FILTer:STATe <boolean>
Command Parameters <boolean> = 0 | 1 | OFF | ON
*RST Value
Query Syntax
Query Parameters
Query Response
Description
OFF
INPut:FILTer:STATe?
None
0 | 1
For the specified input channel, turns the currently selected low-pass filter ON or OFF.
Examples
Related Commands
Command / Query
INP:FILT:STAT 1
INP:FILT:STAT?
INPut:FILTer:FREQuency
Response (Description)
(Enable the input filter state)
1 (Indicates that the input filter is enabled)
VM2601/2/3 Command Dictionary 133
VXI Technology, Inc.
INPut:IMPedance
Purpose
Type
Sets the input impedance for the selected input channel.
Command
Command Syntax INPut:IMPedance <input_imp>
Command Parameters <input_imp> = 50 | 75 | 150 | HIGH
*RST Value
Query Syntax
Query Parameters
Query Response
Description
HIGH
INPut:IMPedance?
None
Returns the value currently selected for the <input_imp> parameter
Sets the input impedance to 50 Ω , 75 Ω , 150 Ω , or HIGH (1 M Ω ). Any value input greater than 200 results in the <input_imp> parameter being set to HIGH.
This command only applies to the DSO input.
NOTE: The input voltage should not exceed 8 V dc or 8 V rms when the 50 Ω ,
75 Ω , or 150 Ω input impedance is selected.
Examples
Related Commands
Command / Query
INP:IMP 50
INP:IMP?
None
Response (Description)
(Sets the input impedance to 50 Ω )
50 (Indicates that the input impedance is set to 50 Ω )
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INPut:OFFSet
Purpose
Type
Command Syntax
Query Response
Description
This command allows the user to compensate for input signal offset.
Command
INPut:OFFSet <input_offs>
Command Parameters <input_offset> = 0.5 | 1.0 | 2.0 | 5.0 | 10.0 | 20.0 (approximately equal to the selected input range, e.g. ±0.5 V in the 0.5 V range)
*RST Value
Query Syntax
Query Parameters
0.0
INPut:OFFSet?
None
Returns the value currently selected for the <input_offset> parameter
This command allows the user to compensate for input signal offset. The range is approximately equal to the selected input range.
This command applies to the DSO input only.
Examples
Related Commands
Command / Query
INP:OFFS 5
INP:OFFS?
None
Response (Description)
(Sets the input offset to 5 V)
5 (Indicates that the input offset is set to 5 V)
VM2601/2/3 Command Dictionary 135
VXI Technology, Inc.
INPut:RANGe
Purpose
Type
Sets the input range to ±0.5 V, ±1.0 V, ±2.0 V, ±5.0 V, ±10.0 V, or ±20.0 V full scale.
Command
Command Syntax INPut:RANGe <input_rang>
Command Parameters <input_range> = 0.5 | 1.0 | 2.0 | 5.0 | 10.0 | 20.0
*RST Value
Query Syntax
Query Parameters
Query Response
Description
20
INPut:RANGe?
None
Returns the value currently selected for the <input_range> parameter
Sets the input range to ±0.5 V, ±1.0 V, ±2.0 V, ±5.0 V, ±10.0 V, or ±20.0 V full scale.
This command applies to the DSO input only.
NOTE: The input voltage should not exceed 8 V dc or 8 V rms when the 50 Ω ,
75 Ω , or 150 Ω input impedance is selected.
Examples
Related Commands
Command / Query
INP:RANG 5
INP:RANG?
None
Response (Description)
(Sets the input range to 5 V)
5 (Indicates that the input range is set to 5 V)
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INPut:SOURce
Purpose
Type
Selects the input source for the instrument.
Command
Command Syntax INPut:SOURce <input_source>
Command Parameters <input_source> = DSO | IFR | DEFault
NOTE: For the VM2602 and VM2603, the only valid setting is DSO. IFR or DEFault will both generate errors.
*RST Value DSO
Query Syntax
Query Parameters
Query Response
Description
INPut:SOURce?
None
DSO | IFR
This command selects the input source used by the VM2601 . The user can select either the differential DSO ( Digital Storage Oscilloscope ) or single ended IFR ( Intermediate
Frequency Receiver ).
This command does not pertain to the VM2602 or VM2603, as the IFR input is not installed on these modules.
Examples
Related Commands
Command / Query
INP:SOUR IFR
INP:SOUR?
None
Response (Description)
(Selects the IFR input source.)
IFR (Indicates that the input source selected is IFR.)
VM2601/2/3 Command Dictionary 137
VXI Technology, Inc.
MEASure:FALL:TIMe?
Purpose
Type
Performs a sequence of commands to provide a fall time measurement for the input.
Query
Command Syntax None
Command Parameters None
Default Value <start_samp> = 0
<#_samp> = 1,024
<lo_ref> = 10 (percent)
Query Syntax
<hi_ref> = 90 (percent)
MEASure:FALL:TIMe? <start_samp>, <#_samp>, <lo_ref>, <hi_ref>, <expected_val> or
MEASure:FTIMe? <start_samp>, <#_samp>, <lo_ref>, <hi_ref>, <expected_val>
Query Parameters <start_samp> = typically 0
<#_samp> = 0 to 16,777,216
<lo_ref> = 0 to 100 (percent). The default is 10% and it must be less than <hi_ref>
<hi_ref> = 0 to 100 (percent). The default is 90% and it must be greater than <lo_ref>
<expected_val> = depends on input
Query Response
Description
Returns a fall time measurement as defined by the <start_samp>, <#_samp>, <lo_ref>,
<hi_ref>, and and <expected_val> parameters.
MEASure:FALL:TIME? causes the instrument to execute an INIT, ARM, TRIGger,
Examples
(acquire), (calculate), and fetch sequence to provide a fall time measurement for the input. Fall time is defined as the time interval that occurs between the 90% reference and
10% reference of the peak value.
The parameters for this query are as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point, that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
• <#_samp> = indicates the number of samples to be used in the measurement.
• <lo_ref> = fall time ends when a negative transition of the input signal crosses this reference point.
• <hi_ref> = fall time begins when a negative transition of the input signal crosses this reference point.
• <expected_val> = the value that is expected to be returned by the instruement.
Command / Query Response (Description)
MEAS:FTIM? 0,100,10,90,x
Related Commands CONFigure:FALL:TIME
CONFigure:FTIME
CALCulate:FALL:TIME?
CALCulate:FTIME?
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MEASure:FREQuency?
Purpose
Type
Performs a sequence of commands to provide a frequency measurement for the input.
Query
Command Syntax
Command Parameters None
Default Value
None
<start_samp> = 0
<#_samp> = 1,024
Query Syntax MEASure:FREQuency? <start_samp>, <#_samples>, <expected_val>
Query Parameters <start_samp> = typically 0
<#_samp> = 0 to 16,777,216
<expected_val> = depends on input
Query Response Returns a frequency measurement as defined by the <start_samp>, <#_samples>, and
<expected_val> parameters.
Description MEASure:FREQuency? causes the instrument to execute an INIT, ARM, TRIGger,
(acquire), (calculate), and fetch sequence to provide a fall time measurement for the input. Frequency is a measure of how often a signal repeats in one second (1/s = Hz).
The parameters for this query are as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point,
Examples
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = the value that is expected to be returned by the instruement. that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
Command / Query Response (Description)
MEAS:FREQ? 0,65536,x
Related Commands CONFigure:FREQuency
CALCulate:FREQuency?
VM2601/2/3 Command Dictionary 139
VXI Technology, Inc.
MEASure:NDUTy?
Purpose
Type
Performs a sequence of commands to provide the negative duty cycle measurement for the input.
Query
Command Syntax None
Command Parameters None
Default Value <start_samp> = 0
<#_samp> = 1,024
Query Syntax
Query Parameters
Query Response
Description
<ref_level> = 50 (percent)
MEASure:NDUTy? <start_samp>, <#_samp>, <ref_level>, <expected_val>
<start_samp> = typically 0
<#_samp> = 0 to 16,777,216
<ref_level> = 0 to 100 (percent, typically 50%)
<expected_val> = depends on input
Returns a negative duty cycle measurement as defined by the <start_samp>, <#_samp>,
<ref_level>, and <expected_val> parameters.
Examples
MEASure:NDUTY? causes the instrument to execute an INIT, ARM, TRIGger,
(acquire), (calculate), and fetch sequence to provide a negative duty cycle measurement for the input. A negative duty cycle is defined as the negative pulse width divided by the period and is expressed as a percentage.
The parameters for this query are as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point, that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
• <#_samp> = indicates the number of samples to be used in the measurement.
• <ref_level> = sets the reference point. Negative pulse width is the amount of time between one negative transition crossing this reference and the subsequent positive transition across this reference.
• <expected_val> = the value that is expected to be returned by the instrument.
Command / Query Response (Description)
MEAS:NDUT? 0,2048,50,x
Related Commands CONFigure:NDUTy
CALCulate:NDUTy?
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MEASure:NWIDth?
Purpose
Type
Performs a sequence of commands to provide a negative pulse width measurement for the input.
Query
Command Syntax None
Command Parameters None
Default Value <start_samp> = 0
<#_samp> = 1,024
Query Syntax
Query Parameters
Query Response
Description
<ref_level> = 50 (percent)
MEASure:NWIDth? <start_samp>, <#_samp>, <ref_level>, <expected_val>
<start_samp> = typically 0
<#_samp> = 0 to
<ref_level> = 0 to 100 (percent, typically 50%)
<expected_val> = depends on input
Returns a negative pulse width measurement as defined by the <start_samp>,
<#_samp>, <ref_level>, and <expected_val> parameters.
MEASure:NWIDth? causes the instrument to execute an INIT, ARM, TRIGger,
(acquire), (calculate), and fetch sequence to provide a negative pulse width measurement for the input. The negative pulse width is a measure of the time required to go from the
50% reference of the falling edge of one wave to the 50% reference of the next rising edge.
The parameters for this query are as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point, that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
• <#_samp> = indicates the number of samples to be used in the measurement.
• <ref_level> = sets the reference point. Negative pulse width is the amount of time between one negative transition crossing this reference and the subsequent positive transition across this reference.
• <expected_val> = the value that is expected to be returned by the instruement.
Examples Command / Query
MEAS:NWID? 0,262144,50,x
Response (Description)
Related Commands CONFigure:NWIDth
CALCulate:NWIDth?
VM2601/2/3 Command Dictionary 141
VXI Technology, Inc.
MEASure:PDUTy?
Purpose
Type
Performs a sequence of commands to provide a positive duty cycle measurement for the input.
Query
Command Syntax None
Command Parameters None
Default Value <start_samp> = 0
<#_samp> = 1,024
Query Syntax
Query Parameters
Query Response
Description
<ref_level> = 50 (percent)
MEASure:PDUTy? <start_samp>, <#_samp>, <ref_level>, <expected_val>
<start_samp> = typically 0
<#_samp> = 0 to 16,777,216
<ref_level> = 0 to 100 (percent, typically 50%)
<expected_val> = depends on input
Returns a positive duty cycle measurement as defined by the <start_samp>, <#_samp>,
<ref_level>, and <expected_val> parameters.
Examples
MEASure:PDUTy? causes the instrument to execute an INIT, ARM, TRIGger,
(acquire), (calculate), and fetch sequence to provide a fall time measurement for the input. A positive duty cycle is defined as the positive pulse width divided by the period and is expressed as a percentage.
The parameters for this query are as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point, that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
• <#_samp> = indicates the number of samples to be used in the measurement.
• <ref_level> = sets the reference point. Positive pulse width is the amount of time between one positive transition crossing this reference and the subsequent negative transition across this reference.
• <expected_val> = the value that is expected to be returned by the instruement.
Command / Query Response (Description)
MEAS:PDUT? 100,1024,50,x
Related Commands CONFigure:PDUTy
CALCulate:PDUTy?
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MEASure:PERCent:NOVershoot?
Purpose Performs a sequence of commands to provide a negative overshoot percentage measurement for the input.
Type
Command Syntax
Query
Command Parameters N/A
*RST Value
None
<start_samp> = 0
<#_samp> = 1,024
Query Syntax
Query Parameters
Query Response
Description
MEASure: PERCent:NOVershoot? <start_samp>, <#_samp>, <expected_val>
<start_samp> = typically 0
<#_samp> = 0 to 16,777,216
<expected_val> = depends on input
Returns a negative overshoot percentage as defined by the <start_samp>, <#_samp>, and <expected_val> parameters.
MEASure:PERCent:NOVershoot? causes the instrument to execute an INIT, ARM,
TRIGger, (acquire), (calculate), and fetch sequence to provide a fall time measurement for the input. The negative overshoot percentage is defined as the amount of voltage by which a post-transitional aberration negatively exceeds a state boundary divided by the signal amplitude.
The parameters for this query are as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point, that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = expected peak-to-peak signal voltage (if sent).
Examples Command / Query
MEAS:PERC:NOV?
Response (Description)
(Returns the negative overshoot percentage.)
Related Commands CALCulate:PERCent:NOVershoot?
CONFigure:PERCent:NOVershoot
VM2601/2/3 Command Dictionary 143
VXI Technology, Inc.
MEASure:PERCent:NPReshoot?
Purpose Performs a sequence of commands to provide a negative preshoot percentage measurement for the input.
Type
Command Syntax
Query
Command Parameters N/A
*RST Value
None
<start_samp> = 0
<#_samp> = 1,024
Query Syntax
Query Parameters
Query Response
Description
MEASure: PERCent:NPReshoot? <start_samp>, <#_samp>, <expected_val>
<start_samp> = typically 0
<#_samp> = 0 to 16,777,216
<expected_val> = depends on input
Returns a negative preshoot percentage as defined by the <start_samp>, <#_samp>, and
<expected_val> parameters.
MEASure:PERCent:NPReshoot? causes the instrument to execute an INIT, ARM,
TRIGger, (acquire), (calculate), and fetch sequence to provide a fall time measurement for the input. The negative preshoot percentage is defined as the amount of voltage by which a pre-transitional aberration negatively exceeds a state boundary divided by the signal amplitude.
The parameters for this query are as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point, that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = expected peak-to-peak signal voltage (if sent).
Examples Command / Query
MEAS:PERC:NPR?
Response (Description)
(Returns the negative preshoot percentage.)
Related Commands CONFigure:PERCent:NPReshoot?
MEASure:PERCent:NPReshoot
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MEASure:PERCent:NRINging?
Purpose Performs a sequence of commands to provide a negative ringing percentage measurement for the input.
Type
Command Syntax
Query
Command Parameters N/A
*RST Value
None
<start_samp> = 0
<#_samp> = 1,024
Query Syntax
Query Parameters
Query Response
Description
MEASure: PERCent:NRINging? <start_samp>, <#_samp>, <expected_val>
<start_samp> = typically 0
<#_samp> = 0 to 16,777,216
<expected_val> = depends on input
Returns a negative preshoot percentage as defined by the <start_samp>, <#_samp>, and
<expected_val> parameters.
MEASure:PERCent:NRINging? causes the instrument to execute an INIT, ARM,
TRIGger, (acquire), (calculate), and fetch sequence to provide a fall time measurement for the input. The negative ringing percentage is defined as the amount of voltage by which a pre-transitional aberration exceeds a state boundary divided by the signal amplitude.
The parameters for this query are as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point, that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = expected peak-to-peak signal voltage (if sent).
Examples Command / Query
CALC:PERC:NRIN?
Response (Description)
(Returns the negative ringing percentage.)
Related Commands CONFigure:PERCent:NRINging?
MEASure:PERCent:NRINging
VM2601/2/3 Command Dictionary 145
VXI Technology, Inc.
MEASure:PERCent:POVershoot?
Purpose Performs a sequence of commands to provide a positive overshoot percentage measurement for the input.
Type
Command Syntax
Query
Command Parameters N/A
*RST Value
None
<start_samp> = 0
<#_samp> = 1,024
Query Syntax
Query Parameters
Query Response
Description
MEASure: PERCent:POVershoot? <start_samp>, <#_samp>, <expected_val>
<start_samp> = typically 0
<#_samp> = 0 to 16,777,216
<expected_val> = depends on input
Returns a positive overshoot percentage as defined by the <start_samp>, <#_samp>, and
<expected_val> parameters.
MEASure:PERCent:NOVershoot? causes the instrument to execute an INIT, ARM,
TRIGger, (acquire), (calculate), and fetch sequence to provide a fall time measurement for the input. The positive overshoot percentage is defined as the amount of voltage by which a post-transitional aberration positively exceeds a state boundary divided by the signal amplitude.
The parameters for this query are as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point, that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = expected peak-to-peak signal voltage (if sent).
Examples Command / Query
MEAS:PERC:POV?
Response (Description)
(Returns the positive overshoot percentage.)
Related Commands CALCulate:PERCent:NOVershoot?
CONFigure:PERCent:NOVershoot
www.vxitech.com
MEASure:PERCent:PPReshoot?
Purpose Performs a sequence of commands to provide a positive preshoot percentage measurement for the input.
Type
Command Syntax
Query
Command Parameters N/A
*RST Value
None
<start_samp> = 0
<#_samp> = 1,024
Query Syntax
Query Parameters
Query Response
Description
MEASure: PERCent:PPReshoot? <start_samp>, <#_samp>, <expected_val>
<start_samp> = typically 0
<#_samp> = 0 to 16,777,216
<expected_val> = depends on input
Returns a positive preshoot percentage as defined by the <start_samp>, <#_samp>, and
<expected_val> parameters.
MEASure:PERCent:PPReshoot? causes the instrument to execute an INIT, ARM,
TRIGger, (acquire), (calculate), and fetch sequence to provide a fall time measurement for the input. The positive preshoot percentage is defined as the amount of voltage by which a pre-transitional aberration positively exceeds a state boundary divided by the signal amplitude.
The parameters for this query are as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point, that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = expected peak-to-peak signal voltage (if sent).
Examples Command / Query
MEAS:PERC:NPR?
Response (Description)
(Returns the negative preshoot percentage.)
Related Commands CONFigure:PERCent:PPReshoot?
MEASure:PERCent:PPReshoot
VM2601/2/3 Command Dictionary 147
VXI Technology, Inc.
MEASure:PERCent:PRINging?
Purpose Performs a sequence of commands to provide a positive ringing percentage measurement for the input.
Type
Command Syntax
Query
Command Parameters N/A
*RST Value
None
<start_samp> = 0
<#_samp> = 1,024
Query Syntax
Query Parameters
Query Response
Description
MEASure: PERCent:PRINging? <start_samp>, <#_samp>, <expected_val>
<start_samp> = typically 0
<#_samp> = 0 to 16,777,216
<expected_val> = depends on input
Returns a positive preshoot percentage as defined by the <start_samp>, <#_samp>, and
<expected_val> parameters.
MEASure:PERCent:PRINging? causes the instrument to execute an INIT, ARM,
TRIGger, (acquire), (calculate), and fetch sequence to provide a fall time measurement for the input. The positive ringing percentage is defined as the amount of voltage by which a pre-transitional aberration exceeds a state boundary divided by the signal amplitude.
The parameters for this query are as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point, that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = expected peak-to-peak signal voltage (if sent).
Examples Command / Query
CALC:PERC:PRIN?
Response (Description)
(Returns the positive ringing percentage.)
Related Commands CONFigure:PERCent:PRINging
MEASure:PERCent:PRINging
www.vxitech.com
MEASure:PERiod?
Purpose
Type
Performs a sequence of commands to provide a period measurement for the input.
Query
Command Syntax
Command Parameters None
Default Value
None
<start_samp> = 0
<#_samp> = 1,024
Query Syntax MEASure:PERiod? <start_samp>, <#_samples>, <expected_val>
Query Parameters <start_samp> = typically 0
<#_samp> = 0 to 16,777,216
<expected_val> = depends on input
Query Response Returns a period measurement as defined by the <start_samp>, <#_samples>, and
<expected_val> parameters.
Description MEASure:PERiod? causes the instrument to execute an INIT, ARM, TRIGger,
(acquire), (calculate), and fetch sequence to provide a period measurement for the input.
The period of a function is defined as the amount of time required for the signal to generate one signal cycle.
The parameters for this query are as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point, that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = the value that is expected to be returned by the instruement.
Examples Command / Query
MEAS:PER? 0,256,x
Response (Description)
Related Commands CONFigure:PERiod
CALCulate:PERiod?
VM2601/2/3 Command Dictionary 149
VXI Technology, Inc.
MEASure:PWIDth?
Purpose
Type
Performs a sequence of commands to provide a positive pulse width measurement for the input.
Query
Command Syntax None
Command Parameters None
Default Value <start_samp> = 0
<#_samp> = 1,024
Query Syntax
Query Parameters
Query Response
Description
<ref_level> = 50 (percent)
MEASure:PWIDth? <start_samp>, <#_samp>, <ref_level>, <expected_val>
<start_samp> = typically 0
<#_samp> = 0 to 16,777,216
<ref_level> = 0 to 100 (percent, typically 50%)
<expected_val> = depends on input
Returns a positive pulse width measurement as defined by the <start_samp>, <#_samp>,
<ref_level>, and <expected_val> parameters.
MEASure:PWIDth? causes the instrument to execute an INIT, ARM, TRIGger,
(acquire), (calculate), and fetch sequence to provide a fall time measurement for the input. The positive pulse width is a measure of the time required to go from the
50% reference of the rising edge of one wave to the 50% reference of the next falling edge.
The parameters for this query are as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point, that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
• <#_samp> = indicates the number of samples to be used in the measurement.
• <ref_level> = sets the reference point. Positive pulse width is the amount of time between one positive transition crossing this reference and the subsequent negative transition across this reference.
• <expected_val> = the value that is expected to be returned by the instruement.
Examples Command / Query
MEAS:PWID? 0,16384,50,x
Response (Description)
Related Commands CONFigure:PWIDth
CALCulate:PWIDth?
www.vxitech.com
MEASure:RISE:TIMe?
Purpose
Type
Performs a sequence of commands to provide a rise time measurement for the input.
Query
Command Syntax None
Command Parameters None
Default Value <start_samp> = 0
<#_samp> = 1,024
<lo_ref> = 10 (percent)
Query Syntax
<hi_ref> = 90 (percent)
MEASure:RISE:TIMe? <start_samp>, <#_samp>, <lo_ref>, <hi_ref>, <expected_val> or
MEASure:RTIMe? <start_samp>, <#_samp>, <lo_ref>, <hi_ref>, <expected_val>
Query Parameters <start_samp> = typically 0
<#_samp> = 0 to 16,777,216
<lo_ref> = 0 to 100 (percent). The default is 10% and it must be less than <hi_ref>
<hi_ref> = 0 to 100 (percent). The default is 90% and it must be greater than <lo_ref>
<expected_val> = depends on input
Query Response
Description
Returns a rise time measurement as defined by the <start_samp>, <#_samp>, <lo_ref>,
<hi_ref>, and and <expected_val> parameterss.
MEASure:RISE:TIME? causes the instrument to execute an INIT, ARM, TRIGger,
Examples
(acquire), (calculate), and fetch sequence to provide a fall time measurement for the input. Rise time is defined as the time interval that occurs between the 10% reference and 90% reference of the peak value.
The parameters for this query are as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point, that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
• <#_samp> = indicates the number of samples to be used in the measurement.
• <lo_ref> = rise time begins when a positive transition of the input signal crosses this reference point.
• <hi_ref> = rise time ends when a positive transition of the input signal crosses this reference point.
• <expected_val> = the value that is expected to be returned by the instruement.
Command / Query Response (Description)
MEAS:RISE:TIM? 0,16384,10,90,x
Related Commands CONFigure:RISE:TIME
CONFigure:RTIME
CALCulate:RISE:TIME?
CALCulate:RTIME?
VM2601/2/3 Command Dictionary 151
VXI Technology, Inc.
MEASure:VOLTage:AMPLitude?
Purpose
Type
Performs a sequence of commands to provide an amplitude measurement for the input.
Query
Command Syntax
Command Parameters None
Default Value
None
<start_samp> = 0
<#_samp> = 1,024
Query Syntax MEASure:VOLTage:AMPLitude? <start_samp>, <#_samples>, <expected_val>
Query Parameters
Query Response
Description
Examples
Related Commands
<start_samp> = typically 0
<#_samp> = 0 to 16,777,216
<expected_val> = depends on input
Returns an amplitude measurement for the input as defined by the <start_samp>,
<#_samples>, and <expected_val> parameters.
MEASure: VOLTage:AMPLitude? causes the instrument to execute an INIT, ARM,
TRIGger, (acquire), (calculate), and fetch sequence to provide an amplitude measurement for the input. Amplitude is defined as the voltage difference between the high and low states.
The parameters for this query are as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point,
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = the value that is expected to be returned by the instruement. that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
Command / Query Response (Description)
MEAS:VOLT:AMPL? 0,65536,x
CONFigure:VOLTage:AMPLitude
CALCulate:VOLTage:AMPLitude?
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MEASure:VOLTage:HIGH?
Purpose
Type
Performs a sequence of commands to provide the high voltage measurement for the input.
Query
Command Syntax None
Command Parameters None
Default Value <start_samp> = 0
<#_samp> = 1,024
Query Syntax
Query Parameters
MEASure:VOLTage:HIGH? <start_samp>, <#_samples>, <expected_val>
<start_samp> = typically 0
<#_samp> = 0 to 16,777,216
<expected_val> = depends on input
Query Response
Description
Returns a voltage measurement as defined by the <start_samp>, <#_samples>, and
<expected_val> parameters.
MEASure:VOLTage:HIGH? causes the instrument to execute an INIT, ARM, TRIGger,
(acquire), (calculate), and fetch sequence to provide a high voltage measurement for the input.
The parameters for this query are as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point, that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = the value that is expected to be returned by the instruement.
Examples Command / Query
MEAS:VOLT:HIGH? 0,65536,x
Response (Description)
Related Commands CONFigure:VOLTage:HIGH
CALCulate: VOLTage:HIGH?
VM2601/2/3 Command Dictionary 153
VXI Technology, Inc.
MEASure:VOLTage:LOW?
Purpose
Type
Performs a sequence of commands to provide the low voltage measurement for the input.
Query
Command Syntax None
Command Parameters None
Default Value <start_samp> = 0
<#_samples> = 1,024
Query Syntax
Query Parameters
MEASure:VOLTage:LOW? <start_samp>, <#_samples>, <expected_val>
<start_samp> = typically 0
<#_samples> = 0 to 16,777,216
<expected_val> = depends on input
Query Response
Description
Returns a voltage measurement as defined by the <start_samp>, <#_samples>, and
<expected_val> parameters.
MEASure:VOLTage:LOW? causes the instrument to execute an INIT, ARM, TRIGger,
(acquire), (calculate), and fetch sequence to provide a low voltage measurement for the input.
The parameters for this query are as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point, that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = the value that is expected to be returned by the instrument.
Examples Command / Query
MEAS:VOLT:LOW? 500,32768,x
Response (Description)
Related Commands CONFigure:VOLTage:LOW
CALCulate: VOLTage:LOW?
www.vxitech.com
MEASure:VOLTage:MAXimum?
Purpose
Type
Performs a sequence of commands to provide the maximum voltage measurement for the input.
Query
Command Syntax None
Command Parameters None
Default Value <start_samp> = 0
<#_samp> = 1,024
Query Syntax
Query Parameters
MEASure:VOLTage:MAXimum? <start_samp>, <#_samples>, <expected_val>
<start_samp> = typically 0
<#_samp> = 0 to 16,777,216
<expected_val> = depends on input
Query Response
Description
Returns a voltage measurement as defined by the <start_samp>, <#_samples>, and
<expected_val> parameters.
MEASure:VOLTage:MAXimum? causes the instrument to execute an INIT, ARM,
TRIGger, (acquire), (calculate), and fetch sequence to provide a maximum voltage measurement for the input.
The parameters for this query are as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point, that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = the value that is expected to be returned by the instruement.
Examples Command / Query
MEAS:VOLT:MAX? 0,32768,x
Response (Description)
Related Commands CONFigure:VOLTage:MAXimum
CALCulate: VOLTage:MAXimum?
VM2601/2/3 Command Dictionary 155
VXI Technology, Inc.
MEASure:VOLTage:MEAN?
Purpose
Type
Performs a sequence of commands to provide the mean voltage measurement for the input.
Query
Command Syntax None
Command Parameters None
Default Value <start_samp> = 0
<#_samp> = 1,024
Query Syntax
Query Parameters
MEASure:VOLTage:MEAN? <start_samp>, <#_samples>, <expected_val>
<start_samp> = typically 0
<#_samp> = 0 to 16,777,216
<expected_val> = depends on input
Query Response
Description
Returns a voltage measurement as defined by the <start_samp>, <#_samples>, and
<expected_val> parameters.
MEASure:VOLTage:MEAN? causes the instrument to execute an INIT, ARM,
TRIGger, (acquire), (calculate), and fetch sequence to provide a mean voltage measurement for the input.
The parameters for this query are as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point, that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = the value that is expected to be returned by the instruement.
Examples Command / Query
MEAS:VOLT:MEAN? 0,131072,x
Response (Description)
Related Commands CONFigure:VOLTage:MEAN
CALCulate: VOLTage:MEAN?
www.vxitech.com
MEASure:VOLTage:MINimum?
Purpose
Type
Performs a sequence of commands to provide the minimum voltage measurement for the input.
Query
Command Syntax None
Command Parameters None
Default Value <start_samp> = 0
<#_samp> = 1,024
Query Syntax
Query Parameters
MEASure:VOLTage:MINimum? <start_samp>, <#_samples>, <expected_val>
<start_samp> = typically 0
<#_samp> = 0 to 16,777,216
<expected_val> = depends on input
Query Response
Description
Returns a voltage measurement as defined by the <start_samp>, <#_samples>, and
<expected_val> parameters.
MEASure:VOLTage:MINimum? causes the instrument to execute an INIT, ARM,
TRIGger, (acquire), (calculate), and fetch sequence to provide a minimum voltage measurement for the input.
The parameters for this query are as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point, that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = the value that is expected to be returned by the instruement.
Examples Command / Query
MEAS:VOLT:MIN? 0,65536,x
Response (Description)
Related Commands CONFigure:VOLTage:MINimum
CALCulate: VOLTage:MINimum?
VM2601/2/3 Command Dictionary 157
VXI Technology, Inc.
MEASure:VOLTage:NOVershoot?
Purpose
Type
Performs a sequence of commands to provide a negative overshoot measurement for the input.
Query
Command Syntax None
Command Parameters None
Default Value <start_samp> = 0
<#_samp> = 1,024
Query Syntax
Query Parameters
MEASure:VOLTage:NOVershoot? <start_samp>, <#_samples>, <expected_val>
<start_samp> = typically 0
<#_samp> = 0 to 16,777,216
<expected_val> = depends on input
Query Response
Description
Returns a voltage measurement as defined by the <start_samp>, <#_samples>, and
<expected_val> parameters.
MEASure:VOLTage:NOVershoot? causes the instrument to execute an INIT, ARM,
TRIGger, (acquire), (calculate), and fetch sequence to provide a netagive overshoot measurement for the input. The negative overshoot is defined as the amount of voltage by which a post-transitional aberration negatively exceeds a state boundary.
The parameters for this query are as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point, that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = the value that is expected to be returned by the instruement.
Examples Command / Query
MEAS:VOLT:NOV? 0,65536,x
Response (Description)
Related Commands CONFigure:VOLTage:NOVershoot
CALCulate: VOLTage:NOVershoot?
www.vxitech.com
MEASure:VOLTage:NPReshoot?
Purpose
Type
Performs a sequence of commands to provide a negative preshoot measurement for the input.
Query
Command Syntax None
Command Parameters None
Default Value <start_samp> = 0
<#_samp> = 1,024
Query Syntax
Query Parameters
MEASure:VOLTage:NPReshoot? <start_samp>, <#_samples>, <expected_val>
<start_samp> = typically 0
<#_samp> = 0 to 16,777,216
<expected_val> = depends on input
Query Response
Description
Returns a voltage measurement as defined by the <start_samp>, <#_samples>, and
<expected_val> parameters.
MEASure:VOLTage:NPREshoot? causes the instrument to execute an INIT, ARM,
TRIGger, (acquire), (calculate), and fetch sequence to provide negative preshoot measurement for the input. The negative preshoot is defined as the amount of voltage by which a pre-transitional aberration negatively exceeds a state boundary.
The parameters for this query are as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point, that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = the value that is expected to be returned by the instruement.
Examples Command / Query
MEAS:VOLT:NPR? 1000,65536,x
Response (Description)
Related Commands CONFigure:VOLTage:NPReshoot
CALCulate: VOLTage:NPReshoot?
VM2601/2/3 Command Dictionary 159
VXI Technology, Inc.
MEASure:VOLTage:NRINging?
Purpose Performs a sequence of commands to provide a negative ringing measurement for the input.
Type
Command Syntax
Query
Command Parameters None
*RST Value
None
<start_samp> = 0
<#_samp> = 1,024
Query Syntax
Query Parameters
Query Response
Description
MEASure:VOLTage:NRINging? <start_samp>, <#_samples>, <expected_val>
<start_samp> = typically 0
<#_samp> = 0 to 16,777,216
<expected_val> = depends on input
Returns a negative ringing measurement for the input as defined by the <start_samp>,
<#_samples>, and <expected_val> parameters.
MEASure: VOLTage:NRINging? causes the instrument to execute an INIT, ARM,
TRIGger, (acquire), (calculate), and fetch sequence to provide an negative ringing measurement for the input. Negative ringing is defined as the peak-to-peak voltage of a negative post-transitional aberration.
The parameters for this query are as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point,
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = the expected peak-to-peak voltage (if sent). that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
Examples Command / Query
MEAS:VOLT:NRIN? 0,16384,x
Response (Description)
(Returns the negative ringing measurement.)
Related Commands CONFigure:VOLTage:NRINging?
MEASure:VOLTage:NRINging
www.vxitech.com
MEASure:VOLTage:POVershoot?
Purpose
Type
Performs a sequence of commands to provide a positive overshoot measurement for the input.
Query
Command Syntax None
Command Parameters None
Default Value <start_samp> = 0
<#_samp> = 1,024
Query Syntax
Query Parameters
MEASure:VOLTage:POVershoot? <start_samp>, <#_samples>, <expected_val>
<start_samp> = typically 0
<#_samp> = 0 to 16,777,216
<expected_val> = depends on input
Query Response
Description
Returns a voltage measurement as defined by the <start_samp>, <#_samples>, and
<expected_val> parameters.
MEASure:VOLTage:POVershoot? causes the instrument to execute an INIT, ARM,
TRIGger, (acquire), (calculate), and fetch sequence to provide a positive overshoot measurement for the input. The positive overshoot is defined as the amount of voltage by which a post-transitional aberration positively exceeds the state boundary.
The parameters for this query are as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point, that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = the value that is expected to be returned by the instruement.
Examples Command / Query
MEAS:VOLT:POV? 0,524288,x
Response (Description)
Related Commands CONFigure:VOLTage:POVershoot
CALCulate: VOLTage:POVershoot?
VM2601/2/3 Command Dictionary 161
VXI Technology, Inc.
MEASure:VOLTage:PPReshoot?
Purpose
Type
Command Syntax
Command Parameters None
None
Default Value
Query Syntax
Query
<start_samp> = 0
<#_samp> = 1,024
Query Parameters
Performs a sequence of commands to provide a positive preshoot measurement for the input.
MEASure:VOLTage:PPReshoot? <start_samp>, <#_samples>, <expected_val>
<start_samp> = typically 0
<#_samp> = 0 to 16,777,216
<expected_val> = depends on input
Query Response Returns a voltage measurement as defined by the <start_samp>, <#_samples>, and
<expected_val> parameters.
Description MEASure:VOLTage:PPReshoot? causes the instrument to execute an INIT, ARM,
TRIGger, (acquire), (calculate), and fetch sequence to provide a positive preshoot measurement for the input. The positive preshoot is defined as the amount of voltage by which a pre-transitional aberration positively exceeds the state boundary.
The parameters for this query are as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point,
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = the value that is expected to be returned by the instruement. that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
Examples Command / Query
MEAS:VOLT:PPR? 0,524288,x
Response (Description)
Related Commands CONFigure:VOLTage:NPReshoot
CALCulate: VOLTage:NPReshoot?
www.vxitech.com
MEASure:VOLTage:PRINging?
Purpose
Type Query
Command Syntax
Command Parameters None
None
*RST Value
Performs a sequence of commands to provide a negative ringing measurement for the input.
Query Syntax
Query Parameters
<start_samp> = 0
<#_samp> = 1,024
MEASure:VOLTage:PRINging? <start_samp>, <#_samples>, <expected_val>
Query Response
Description
<start_samp> = typically 0
<#_samp> = 0 to 16,777,216
<expected_val> = depends on input
Returns a positive ringing measurement for the input as defined by the <start_samp>,
<#_samples>, and <expected_val> parameters.
MEASure: VOLTage:PRINging? causes the instrument to execute an INIT, ARM,
TRIGger, (acquire), (calculate), and fetch sequence to provide an positive ringing measurement for the input. Positive ringing is defined as the peak-to-peak voltage of a positive post-transitional aberration.
The parameters for this query are as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point, that will be the first sample used in the measurement. (0 = trigger point). If
Examples
<start_samp> is negative, pre-trigger samples will be included in the measurement.
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = the expected peak-to-peak voltage (if sent).
Command / Query Response (Description)
MEAS:VOLT:PRIN? 0,16384,x (Returns the positive ringing measurement.)
Related Commands CONFigure:VOLTage:PRINging?
MEASure:VOLTage:PRINging
VM2601/2/3 Command Dictionary 163
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MEASure:VOLTage:PTPeak?
Purpose
Type
Command Syntax
Command Parameters None
None
Default Value
Query Syntax
Query
<start_samp> = 0
<#_samp> = 1,024
Query Parameters
Performs a sequence of commands to provide the peak-to-peak measurement for the input.
MEASure:VOLTage:PTPeak? <start_samp>, <#_samples>, <expected_val>
<start_samp> = typically 0
<#_samp> = 0 to 16,777,216
<expected_val> = depends on input
Query Response Returns a peak-to-peak voltage measurement as defined by the <start_samp>,
<#_samples>, and <expected_val> parameters.
Description MEASure:VOLTage:PTPeak? causes the instrument to execute an INIT, ARM,
TRIGger, (acquire), (calculate), and fetch sequence to provide a peak-to-peak voltage measurement for the input. The peak-to-peak voltage (V
P-P
) is defined as the voltage measured between the signal’s maximum and minimum points.
The parameters for this query are as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point,
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = the value that is expected to be returned by the instruement. that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
Examples Command / Query
MEAS:VOLT:PTP? 0,1048576,x
Response (Description)
Related Commands CONFigure:VOLTage:PTPeak
CALCulate: VOLTage:PTPeak?
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MEASure:VOLTage:RMS?
Purpose
Type
Command Syntax
Performs a sequence of commands to provide a room mean square voltage of the input.
Query
None
Command Parameters None
Default Value <start_samp> = 0
<#_samp> = 1,024
Query Syntax
Query Parameters
Query Response
Description
MEASure:VOLTage:RMS? <start_samp>, <#_samples>, <expected_val>
<start_samp> = typically 0
<#_samp> = 0 to 16,777,216
<expected_val> = depends on input
Returns a voltage measurement as defined by the <start_samp>, <#_samples>, and
<expected_val> parameters.
MEASure:VOLTage:RMS? causes the instrument to execute an INIT, ARM, TRIGger,
(acquire), (calculate), and fetch sequence to provide the root-mean-square voltage of the input. The root-mean-square voltage is defined by the following formula:
V rms
=
∑ n − 1 v 2
0 n
, where v = voltage and n = number of samples
Examples
Related Commands
The parameters for this command are as follows:
• <start_samp> = indicates the number of the sample, with respect to the trigger point, that will be the first sample used in the measurement. (0 = trigger point). If
<start_samp> is negative, pre-trigger samples will be included in the measurement.
• <#_samp> = indicates the number of samples to be used in the measurement.
• <expected_val> = the value that is expected to be returned by the instruement.
Command / Query Response (Description)
MEAS:VOLT:RMS? 0,8192,x
CONFigure:VOLTage:RMS
CALCulate: VOLTage:RMS?
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READ?
Purpose
Type
Command Syntax
Initiates, arms, triggers, and fetches a previously configured measurement.
Query
None
Command Parameters N/A
*RST Value None
Query Syntax
Query Parameters
Query Response
Description
READ?
None
Returns data previously acquired by a MEASure:…? query.
This query performs a sequence of commands which allows acquired data to be viewed.
After performing a CONFigure:…? subsystem query, the READ? query performs an
INITiate[:IMMediate] command and a FETCh? query.
Examples
Related Commands
Command / Query
CONF:VOLT:MAX?
READ?
Response (Description)
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ROSCillator:FREQuency
Purpose
Type
Command Syntax
Sets the reference oscillator frequency.
Command
ROSCillator:FREQuency <osc_freq>
Command Parameters <osc_freq> = 1e6 | 5e6 | 1e7 (1 MHz, 5 MHz, and 10 MHz, respectively)
*RST Value 1e7
Query Syntax
Query Parameters
Query Response
Description
ROSCillator:FREQuency?
None
Returns the value currently selected for the <osc_freq> parameter
The ROSCillator:FREQuency command sets the reference oscillator frequency. This command only applies if ROSC:SOUR is set to EXT, in which case the reference clock source is the front panel clock input.
Examples
Related Commands
Command / Query Response (Description)
ROSC:FREQ 5e6 (Sets the reference oscillator to 5 MHz.)
ROSC:FREQ?
ROSCillator:SOURce
5 (Indicates that the reference oscillator is operating at 5 MHz.)
VM2601/2/3 Command Dictionary 167
VXI Technology, Inc.
ROSCillator:SOURce
Purpose
Type
Command Syntax
Selects the reference oscillator source.
Command
ROSCillator:SOURce <osc_source>
Command Parameters <osc_source> = BUS | EXTernal
*RST Value BUS (10 MHz VXI backplane)
Query Syntax
Query Parameters
Query Response
Description
ROSCillator:SOURce?
None
BUS | EXT
Selects the reference oscillator source.
Examples
Related Commands
Command / Query
ROSC:SOUR EXT
ROSC:SOUR?
ROSCillator:FREQuency
Response (Description)
(Sets the reference oscillator to be external).
EXT (Indicates that the VM2601 is utilizing an external reference oscillator.)
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SAMPle:CLOCk:FREQuency
Purpose
Type
Command Syntax
Outputs the selected sample clock frequency.
Command
SAMPle:CLOCk:FREQuency <sample_clock_freq>
Command Parameters <sample_clock_freq> = SLOW ADC: 1 kHz – 10 MHz
FAST ADC: 4.768 kHz – SR
MAX
(see below)
*RST Value
Query Syntax
Query Parameters
10 MHz for SLOW and FAST ADC
SAMPle:CLOCk:FREQuency?
Query Response
Description
None
Returns the current value of the <sample_clock_freq> parameter
This command sets the sample clock frequency. The maximum sample rate (SR the VM2603.
MAX
) of the FAST ADC is 80 MHz for the VM2601, 40 MHz for the VM2602, and 20 MHz for
Examples
Related Commands
Command / Query
CONF:ADC SLOW
SAMP:CLOC:FREQ 1e6
SAMP:CLOC:FREQ?
None
Response (Description)
(Selects the SLOW ADC.)
(Selects a sample clock frequency of 1 MHz.)
1e6 (Indicates that the sample clock frequency is set to 1 MHz.)
VM2601/2/3 Command Dictionary 169
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SAMPle:CLOCk:SOURce
Purpose
Type
Command Syntax
Routes the selected sample clock source to the data acquisition timing circuit.
Command
SAMPle:CLOCk:SOURce <clock_source>
Command Parameters <clock_source> = INTernal | EXTernal | SYNC
*RST Value INTernal
Query Syntax
Query Parameters
Query Response
Description
SAMPle:CLOCk:SOURce?
None
Returns the value currently selected for the <clock_source> parameter.
Outputs the selected sample clock source. If set to SYNChronize:MODE is set to
SLAVe and SYNChronize:STATe is set to ON, SAMPle:CLOCk:SOURce SYNC is automatically selected and need not be sent.
Examples
Related Commands
Command / Query
SAMP:CLOC:SOUR EXT
SAMP:CLOC:SOUR?
None
Response (Description)
(Selects an external source as the sample clock.)
EXT (Indicates that an external sample clock source is selected.)
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SWEep:COUNt
Purpose
Type
Command Syntax
Set the number of segments.
Command
SWEep:COUNt <num_segments>
Command Parameters <num_segments > = 1 – 65,536, where <num_segments> must be an integer power of 2
(i.e. 1, 2, 4, 8… 65,536)
*RST Value
Query Syntax
Query Parameters
Query Response
Description
1
SWEep:COUNt?
None
Returns the current value set for the <num_segments > parameter.
This command sets the number of descrete segments sample memory will be partitioned into. If multiple segments are defined, the data will be stored in segment 0 following the first “INIT” command. The next “INIT” command will cause data to be stored in segment 1, and so on. Pre-trigger data acquisitions is supported when eight or fewer segments are defined. If more than eight segments are defined, only post-trigger samples will be acquired.
The number of segments configured must be an even power of two (2 n ). The maximum number of segments is 65,536. For standard units with 16 MSa RAM, the minimum segment size is 256 samples. For units equipped with the optional 32 MSa RAM, the minimum segment size is 512 samples. segment size = sample RAM size number of segments
Examples Command / Query
SWE:COUN 3.2e4
Response (Description)
(Sets the number of segments to 32,000)
SWE:COUN? 3.2e4 (Indicates that the number of segments has been set to 32,000.)
Related Commands None
VM2601/2/3 Command Dictionary 171
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SWEep:POINts
Purpose
Type
Command Syntax
Sets the post-trigger sample count.
Command
SWEep:POINts < post-trig_samples>
Command Parameters <post-trig_samples> = number of samples to acquire
*RST Value 1,024
Query Syntax
Query Parameters
Query Response
Description
SWEep:POINts?
None
Returns the current value set for the <post-trig_samples> parameter.
This command sets the post-trigger sample count. The following restrictions exist for this command:
• Minimum post-triger samples = 8
• When configured for 1 to 8 segments: maximum post trigger samples =
⎛
⎜⎜ memory size number of segments
⎞
⎟⎟
− pre − trigger count
• When configured for 16 to 65,536 segments: maximum post trigger samples =
⎛
⎜⎜ memory size number of segments
⎞
⎟⎟
Examples
Related Commands
• Memory size for the standard 16 MSa RAM =16,777,216.
• Memory size for the optional 32 MSa RAM = 33,554,432.
Command / Query Response (Description)
SWE:POIN 4 (Sets the sample count to 4.)
SWE:POIN?
INITiate:DELay
4 (Indicates that the sample count size is set to 4.)
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SWEep:TINTerval
Purpose
Type
Command Syntax
This command sets the sample rate for the ADC.
Command
SWEep:TINTerval <sample_time>
Command Parameters <sample_time> = 12.5 ns – 209.7 ms (Fast ADC)
100 ns – 1 ms (Slow ADC)
*RST Value
Query Syntax
Query Parameters
Fast or Slow ADC: 100 ns
SWEep:TINTerval?
None
Query Response
Description
Returns the current value set for the <sample_time> parameter.
This command sets the sample rate for the ADC.
Examples
Related Commands
Command / Query
CONFigure:ADC FAST
SWE:TINT 1e-3
SWE:TINT?
None
Response (Description)
(Selects the fast ADC)
(Sets the ADC sample rate to 1 ms)
1e-3 (Indicates that the ADC sample rate is 1 ms)
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SYNChronize:MODE
Purpose
Type
Command Syntax
Sets the instrument to function as a synchronized master or slave.
Command
SYNChronize:MODE <sync_mode>
Command Parameters <sync_mode> = MASTer | SLAVe | OFF
*RST Value OFF
Query Syntax
Query Parameters
SYNChronize:MODE?
None
Query Response
Description
Returns the value currently selected for the <sync_mode> parameter
This command sets the instrument to perform as either a MASTer or as a SLAVe when synchronized with other VM2601 modules.
Examples
Related Commands
Command / Query
SYNC:MODE SLAV
SYNC:MODE?
SYNChronize:STATe
Response (Description)
(Sets the module to act as a slave)
SLAV (indicates that the module is functioning as a slave.)
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SYNChronize:STATe
Purpose
Type
Command Syntax
Enables/disables synchronization operations.
Command
SYNChronize:STATe <boolean>
Command Parameters <boolean> = 0 | 1 | OFF | ON
*RST Value OFF
Query Syntax
Query Parameters
SYNChronize:STATe?
None
Query Response
Description
Returns the value currently selected for the <boolean> parameter
This command enables or disables the module’s ability to synchronize with other
VM2601 modules.
Examples
Related Commands
Command / Query
SYNC:STAT 1
SYNC:STAT?
SYCHronize:MODE
Response (Description)
(Enables synchronization operation.)
1 (Indicates that synchronization has been enabled.)
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TRIGger[:IMMediate]
Purpose
Type
Command Syntax
Triggers the instrument on receipt of the command.
Event
TRIGger[:IMMediate]
Command Parameters None
*RST Value N/A
Query Syntax
Query Parameters
Query Response
Description
None
N/A
N/A
The Trigger Immediate command performs the same function as the *TRG command.
This command takes effect only when the module is armed for a trigger. This command must wait long enough for pre-trigger samples to be acquired after arming the instrument. If the arm source and the trigger source are set to immediate, the data acquisition sequence is: INITiate[:IMM], ARM, TRIGger.
Examples
Related Commands
Command / Query
TRIG
INITiate:DELay
INITiate[:IMMediate]
*TRG
Response (Description)
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TRIGger:LEVel
Purpose
Type
Command Syntax
Sets the comparator level of the trigger signal.
Setting
TRIGger:LEVel <trigger_level>
Command Parameters <trigger_level> = Numeric ASCII value
*RST Value 0.0 V
Query Syntax
Query Parameters
Query Response
Description
TRIGger:LEVel?
None
Numeric ASCII value
The Trigger Level command sets the trigger level for the selected trigger source, given that the source is either the front panel external trigger input or the DSO measurement input. If the input trigger source is selected, the valid range for the trigger level is the entire input range at the selected gain (i.e. the 1 V range can have a trigger level from
-1.0 V to +1.0 V). The external input has a range of -4 V to +4 V.
The input trigger source is only available on the DSO input.
Examples
Related Commands
Command / Query
TRIG:LEV 0.5
TRIG:LEV?
TRIGger:SLOPe
TRIGger:SOURce
VOLTage:RANGe
Response (Description)
(Sets the trigger level to 0.5 V)
0.5 ( Indicates that the trigger level is set to 0.5 V)
VM2601/2/3 Command Dictionary 177
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TRIGger:SLOPe
Purpose
Type
Command Syntax
Specifies the slope of the Trigger Signal for the VM2601.
Setting
TRIGger:SLOPe <trig_slope>
Command Parameters <trig_slope> = POSitive | NEGative
*RST Value POS
Query Syntax
Query Parameters
Query Response
Description
TRIGger:SLOPe?
None
POS | NEG
The Trigger Slope command selects the active edge for triggering the VM2601.
Selecting the positive slope will require that the trigger input make a negative to positive transition through the trigger level, while a negative slope requires the trigger input to make a positive to negative transition.
Examples
Related Commands
Command / Query
TRIG:SLOP NEG
TRIG:SLOP?
TRIG:SLOP POS
TRIG:SLOP?
TRIGger:LEVel
TRIGger:SOURce
Response (Description)
NEG
POS
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TRIGger:SOURce
Purpose
Type
Command Syntax
Selects the trigger source for the VM2601.
Setting
TRIGger:SOURce <trig_source>
Command Parameters <trig_source> = EXTernal | IMMediate | INPut | SYNC | TTLT<0-7>
*RST Value IMMediate
Query Syntax
Query Parameters
TRIGger:SOURce?
None
Query Response
Description
Returns the value currently selected for the <trig_source> parameter
The Trigger Source command selects the source of input trigger for data capture. The query returns the source of the input trigger used for data capture.
Examples
Related Commands
Command / Query
TRIG:SOUR TTLT0
TRIG:SOUR?
TRIG:SOUR EXT
TRIG:SOUR?
TRIGger:LEVel
TRIGger:SLOPe
Response (Description)
(This sets the input trigger source to TTL Trigger 0.)
TTLT 0
(This sets the input trigger source to an external source.)
EXT
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TRIGger:STATe?
Purpose
Type
Command Syntax
Query returns whether or not the VM2601 has been triggered
Setting
TRIGger:STATe <boolean>
Command Parameters <boolean> = 1 | 0
*RST Value 0
Query Syntax
Query Parameters
Query Response
Description
TRIGger:STATe?
None
Boolean ASCII value
This command returns the current state of the trigger mode.
The valid states are:
0: Waiting for Trigger
1: Trigger has occurred
Examples
Related Commands
Command / Query
TRIG:STAT?
TRIGger:SLOPe
TRIGger:SOURce
VOLTage:RANGe
Response (Description)
0 (Device in waiting for trigger mode.)
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R
EQUIRED
SCPI C
OMMANDS
STATus:OPERation:CONDition?
Purpose
Type
Example
The STATus:OPERation:CONDition query returns the current operational status of the digitizer.
Required SCPI query
Command Syntax
*RST Value
N/A
Command Parameters N/A
0
Query Syntax STATus:OPERation:CONDition?
Query Parameters
Query Response
Description
N/A
This query returns the operational condition register value.
The STATus:OPERation:CONDition query returns the current operational status of the digitizer. The bit definitions of the value are (bit ( ) = the least significant bit):
Bit Definition
0 Calibrating
1
2
Setting
Ranging
Function
Set when any CALibration operation is running. Cleared when the CALibration operation is complete.
Set when the instrument changes its function or range.
Cleared when the all circuitry has settled.
Set when the instrument is auto-ranging. Cleared when the input range has been found.
3 Sweeping
4 Measuring Set when an INITiate command is executed. Cleared when the command is complete or aborted
5 Triggering
6
7
8
9
10
11
Arming
Correcting
Testing (User 1)
Testing (User 2)
User 3
User 4
Set when the instrument is waiting for an arm signal.
Cleared when the arm is received.
Set when the instrument is performing an auto-zero operation. Cleared when the auto-zero operation is complete.
Set when the instrument is performing a self-test. Cleared when the self-test is complete.
Set when the instrument is in the process of aborting an operation. Cleared when the abort is complete.
Not used
Not used
Reserved
13 Instrument Summary Not used
14 Program Running Not used
15 Reserved
Command / Query Response (Description)
STAT:OPER:COND? 16 (Making a measurement (0x010 hex)
Related Commands
STAT:OPER:COND? 3072 (Measurement complete because of ABORt (0xC00 hex)
MEASure?, READ?, INITiate, ABORt
VM2601/2/3 Command Dictionary 181
VXI Technology, Inc.
STATus:OPERation:ENABle
Purpose
Type
Command Syntax
Sets the Operation Status Register's enable register.
Required SCPI command
STATus:OPERation:ENABle <NRf>
Command Parameters <NRf> = numeric ASCII value from 0 to 32767
*RST Value <NRf> must be specified
Query Syntax
Query Parameters
Query Response
Description
STATus:OPERation:ENABle?
N/A
<NRf> = Numeric ASCII value from 0 to 32767
This command enables bits in the Operation Status Register's enable register to report to the summary bit; sets Status Bytes register bit 7 to true.
The query reports the bits enabled in the Operation Status Register's enable register, then clears the register contents and enters the value into the computer.
Examples
Related Commands
Command / Query
STAT:OPER ENAB 33
STAT:OPER:ENAB?
STATus:OPERation:CONDition?
STATus:OPERation[:EVENt]
Response (Description)
(Enables bit 0 and bit 5)
33 (Indicates that bit 0 and 5 are enabled)
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STATus:OPERation[:EVENt]?
Purpose
Type
Command Syntax
Queries the Operation Status Register's event register.
Required SCPI query
N/A
Command Parameters N/A
*RST Value N/A
Query Syntax
Query Parameters
STATus:OPERation[:EVENt]?
N/A
Query Response
Description
0
Queries the bits set in the event register of the Operation Status Register. This command clears all bits in the event register.
Examples
Related Commands
Command / Query
STAT:OPER?
STATus:OPERation:CONDition?
STATus:OPERation:ENABle?
Response (Description)
0
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STATus:PRESet
Purpose
Type
Command Syntax
Presets the Status Registers.
Required SCPI command
STATus:PRESet
Command Parameters N/A
*RST Value N/A
Query Syntax
Query Parameters
Query Response
Description
N/A
N/A
N/A
The Status Preset command presets the Status Registers. The Operational Status
Enable Register is set to 0 and the Questionable Status Enable Register is set to 0.
This command is provided for SCPI compliance only.
Examples
Related Commands
Command / Query
STAT:PRES
N/A
Response (Description)
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STATus:QUEStionable:CONDition?
Purpose
Type
Command Syntax
Queries the Questionable Status Condition Register.
Required SCPI query
N/A
Command Parameters N/A
*RST Value N/A
Query Syntax
Query Parameters
Query Response
Description
STATus:QUEStionable:CONDition?
N/A
0
The Questionable Status Condition Register query is provided for SCPI compliance only. The VM2601 does not alter any bits in this register and a query always reports a
0.
Examples
Related Commands
Command / Query
STAT:QUES:COND?
N/A
Response (Description)
0
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VXI Technology, Inc.
STATus:QUEStionable:ENABle
Purpose
Type
Command Syntax
Sets the Questionable Status Enable Register.
Required SCPI command
STATus:QUEStionable:ENABle <NRf>
Command Parameters <NRf> = numeric ASCII value from 0 to 32767
*RST Value <NRf> must be supplied
Query Syntax
Query Parameters
Query Response
Description
STATus:QUEStionable:ENABle?
N/A
<NRf> = Numeric ASCII value from 0 to 32767
The command sets the bits in the Questionable Data/Signal Register's enable register to be reported to the summary bit (sets Status Byte Register bit 3 to true).
The Status Questionable Enable query reports the contents of the Questionable
Data/Signal Register's enable register, then clears the register contents and enters the value into the computer.
Examples
Related Commands
Command / Query
STAT:QUES:ENAB 64
STAT:QUES:ENAB?
N/A
Response (Description)
64
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STATus:QUEStionable[:EVENt]?
Purpose
Type
Command Syntax
Queries the Questionable Status Event Register.
Required SCPI query
N/A
Command Parameters N/A
*RST Value N/A
Query Syntax
Query Parameters
Query Response
Description
STATus:QUEStionable[:EVENt]?
N/A
Decimal number
The query reports the bits set in the event register of the Questionable Data/Signal register. This command reads the event register, then clears all bits in the event register and enters the value into the computer.
Examples
Related Commands
Command / Query
STAT:QUES?
N/A
Response (Description)
0
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SYSTem:ERRor?
Purpose
Type
Command Syntax
Queries the Error Queue.
Required SCPI command
None - Query Only
Command Parameters N/A
*RST Value N/A
Query Syntax
Query Parameters
Query Response
Description
SYSTem:ERRor?
None
ASCII string
The System Error query is used to retrieve error messages from the error queue. The error queue will maintain two error messages. If additional errors occur, the queue will overflow and the second and subsequent error messages will be lost. In the case of an overflow, an overflow message will replace the second error message. See the SCPI standard Volume 2: Command Reference for details on errors and reporting them.
Examples
Related Commands
Command / Query
SYS:ERR?
None
Response (Description)
-350, “Queue overflow”
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SYSTem:VERSion?
Purpose
Type
Command Syntax
Queries which version of the SCPI standard with which this module complies.
Required SCPI command
None - Query Only
Command Parameters N/A
*RST Value N/A
Query Syntax
Query Parameters
SYSTem:VERSion?
None
Query Response
Description
Numeric ASCII value
The System Version query reports the version of the SCPI standard with which the
VM2601 complies.
Examples
Related Commands
Command / Query
SYST:VERS?
None
Response (Description)
1994.0
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E
RROR
M
ESSAGES
In the event that an error occurs during operation, an error message will appear. The following error messages may appear for the reasons stated below:
Generic Error An error has occurred for a reason other than those below
Invalid Manufacturer’s ID
Invalid Model Code
Instrument Error
The instrument has an invalid manufacturer’s ID.
The model code for this instrument is invalid.
Device Not Ready
Invalid Input Source
An error from the driver generated when a command sent to the instrument is, in some way, invalid (i.e. misspelling, invalid parameter value, etc.)
An error from the driver indicating that the instrument was not ready.
The<input source> parameter is defined incorrectly for INPut:SOURce. Either DSO or IFR are acceptable for the VM2601. Only DSO is acceptable for the VM2602 or VM2603.
Invalid ADC Type
Invalid Sync Mode
The <config_adc> parameter is defined incorrectly for the CONFigure:ADC command. Either FAST, SLOW, or AUTO is acceptable.
The <sync_mode> parameter is defined incorrectly for the SYNChronnize:MODE command. Either MASTer or
SLAVe
Invalid Mark Source The <mark_source_x> parameters are defined incorrectly for the COMBine:FEED command. Either
GND, GPO, GP1 or OVR is acceptable for either
parameter.
Invalid Auto Re-Arm Setting The <boolean> parameter is defined incorrectly for the
ARM:AUTO command. Either 0, 1, OFF, or ON is
acceptable.
Invalid Arm Source The <arm_source> parameter is defined incorrectly for the ARM:SOURce command. Either EXTernal,
IMMediate, SYNC, or TTLT<0-7> is acceptable.
Invalid Arm Slope The <arm_slope> parameter is defined incorrectly for the ARM:SLOPe command. Either POSitive or
NEGative
Invalid Trigger Source The <arm_source> parameter is defined incorrectly for the ARM:SOURce command. Either EXTernal,
IMMediate, INPut, SYNC, or TTLT<0-7> is acceptable.
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Invalid Gain Setting The <adc_gain> or <dac_gain> parameter is defined incorrectly for the CALibration:DEFault:GAIN command. For<adc_gain>, x is acceptable and for
<dac_gain>, y is acceptable.
Invalid Filter Frequency The <filter_freq> parameter is defined incorrectly for
the or 40e6 is acceptable.
Invalid Filter State The <boolean> parameter is defined incorrectly for the
INPut:FILTer:STATe command. Either 0, 1, OFF, or
Invalid Input Range The <input_range> parameter is defined incorrectly for the INPut:RANGe command. Either 0.5, 1.0, 2.0,
5.0, 10.0, or 20.0 is acceptable.
Invalid Reference Oscillator Frequency The <osc_freq> parameter is defined incorrectly for the
ROSCillator:FREQuency command. Either 1e6, 5e6, or
1e7
Invalid Reference Oscillator Source The <osc_source> parameter is defined incorrectly for the ROSCillator:SOURce command. Either BUS or
EXTernal
Invalid Register Value Indicates that a write to a register exceeds the maximum value the register can accomidate (e.g. a number greater than 255 is written to an 8-bit register.)
Invalid Transition Filter Value Indicates that a write to a register exceeds the maximum value the register can accomidate (e.g. a number greater than 255 is written to an 8-bit register.)
Max Error String The maximum length of the <string> parameter was exceeded. This parameter must be 12 characters or less.
VM2601/2/3 Command Dictionary 191
VXI Technology, Inc.
www.vxitech.com
A PPENDIX A
N
OISE
S
PECIFICATION
H
OW
RMS N
OISE IS
C
ALCULATED
The VM2601 calculates root-mean-square voltage ( V rms ) on an “ac + dc” basis, but the noise specification is an “ac only” measurement. When calculated, a 50 Ω load is applied to the front end of the VM2601 and then two measurements are taken using the following commands:
CALCulate:VOLTage:RMS? and CALCulate:VOLTage:MEAN?. These values, V rms and V
Mean
, respectively, can then be used to calculate the noise value.
The short version is:
V
Noise
= V rms
2 − V
Mean
2
Here is the derivation:
or V
Noise
= ( V rms
* V rms
) − ( V
Mean
* V
Mean
)
V
Noise
= ∑ ( x i
− x )
2 n
(this removes the average or dc from each term before squaring)
Next, a binomial expansion on the squared term in the summation is performed:
V
Noise
=
∑ x i
2 −
∑ n
2 x i x +
∑ x
2
Since x is a constant, the following simplifications can be performed:
∑
2 x i x = 2 x
∑ x i
and
∑ x 2 = n x 2
If these values are substituted into the equation and the position of the last two terms are changed, and if three separate terms are created, the equation becomes:
V
Noise
=
∑ n x i
2
+ n x n
2 − 2 x
∑ n x i
In the second term, the “ n ”s cancel ( n n
= 1 ). In the last term,
∑ n x i = x , making the equation:
V
Noise
=
∑ n x i
2
+ x 2 − 2 x 2
Next, the the last two terms are combind to produce:
V
Noise
=
∑ n x i
2
− x 2
Appendix A: Noise Specification 193
When the VM2601 makes an rms measurement, it does so in this manner:
V rms
=
∑ n x
2
When it takes a mean measurement, it does so in this manner:
V
Mean
=
∑ n x i = x
This means that V
Noise
can be calculated as:
V
Noise
= V rms
2 − V
Mean
2 or V
Noise
= ( V rms
* V rms
) − ( V
Mean
* V
Mean
) .
VXI Technology, Inc.
194 Appendix A: Noise Specification
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I
NDEX
Symbol
- INPUT ............................................................................14
*CLS...........................................................................30, 38
*ESE...........................................................................30, 39
*ESR? .........................................................................30, 40
*IDN? .........................................................................30, 41
*OPC ..........................................................................30, 42
*RST.....................................................................29, 30, 43
*SRE...........................................................................30, 44
*STB? .........................................................................30, 45
*TRG ..........................................................................30, 46
*TST? .........................................................................30, 47
*WAI ..........................................................................30, 48
+ INPUT ...........................................................................14
A
ABORt........................................................................31, 49 ac amplitude accuracy.......................................................17 aiming, triggering and clocking specifications .................18 analog input specifications................................................16 arm source.........................................................................18
ARM/GP1 INPUT ............................................................14
ARM:AUTO...............................................................31, 50
ARM:LEVel ...............................................................31, 52
ARM:SLOPe ..............................................................31, 53
ARM:SOURce............................................................31, 54
ARM:STATe? ..................................................................31
ARM[:IMMediate] .....................................................31, 51
B backplane..........................................................................21 bandwidth .........................................................................16 block diagram ...................................................................15 built-in measurement functions.........................................18
C
CALCulate:FALL:TIMe?.................................................31
CALCulate:FREQuency? ...........................................31, 56
CALCulate:NDUTy?..................................................31, 57
CALCulate:NWIDth? .................................................31, 58
CALCulate:PDUTy?...................................................31, 59
CALCulate:PERCent:NOVershoot?.................................60
CALCulate:PERCent:NPReshoot? ...................................61
CALCulate:PERCent:NRINging? ....................................62
CALCulate:PERCent:POVershoot?..................................63
CALCulate:PERCent:PPReshoot?....................................64
CALCulate:PERCent:PRINging? .....................................65
CALCulate:PERiod?...................................................31, 66
CALCulate:PWIDth?..................................................31, 67
CALCulate:RISE:TIMe? ............................................31, 68
CALCulate:VOLTage:AMPLitude?...........................31, 69
CALCulate:VOLTage:HIGH?....................................31, 70
CALCulate:VOLTage:LOW?.....................................31, 71
CALCulate:VOLTage:MAXimum? ...........................31, 72
CALCulate:VOLTage:MEAN? ..................................31, 73
CALCulate:VOLTage:MINimum?.............................31, 74
VM2601/2/3 Index
CALCulate:VOLTage:NOVershoot? ......................... 31, 75
CALCulate:VOLTage:NPReshoot? ........................... 31, 76
CALCulate:VOLTage:NRINging .................................... 77
CALCulate:VOLTage:POVershoot?.......................... 31, 78
CALCulate:VOLTage:PPReshoot?............................ 31, 79
CALCulate:VOLTage:PRINging? ................................... 80
CALCulate:VOLTage:PTPeak? ................................. 32, 81
CALCulate:VOLTage:RMS?..................................... 32, 82
Calculating System Power and Cooling Requirements .... 19 calibration......................................................................... 13 calibration temperature..................................................... 18
CALibration:ADC:GAIN........................................... 32, 83
CALibration:ADC:OFFSet ........................................ 32, 84
CALibration:COUNt? ................................................ 32, 85
CALibration:DAC:GAIN........................................... 32, 86
CALibration:DAC:OFFSet ........................................ 32, 87
CALibration:DEFault................................................. 32, 88
CALibration:RESet .................................................... 32, 89
CALibration:SECure[:STATe]................................... 32, 91
CALibration:STORe .................................................. 32, 92 capacitance ....................................................................... 16 chassis backplane jumpers................................................ 20
CMRR .............................................................................. 17
COMBine:FEED ........................................................ 32, 93
Command Dictionary ....................................................... 37
Common Mode Rejection Ratio....................................... 17
CONFigure:ADC ....................................................... 32, 95
CONFigure:FALL:TIMe............................................ 32, 96
CONFigure:FREQuency ............................................ 32, 97
CONFigure:FTIMe .................................................... 32, 96
CONFigure:HORizontal:RESolution ......................... 32, 98
CONFigure:NDUTy................................................... 32, 99
CONFigure:NWIDth................................................ 32, 100
CONFigure:PDUTy ................................................. 32, 101
CONFigure:PERCent:NOVershoot................................ 102
CONFigure:PERCent:NPReshoot.................................. 103
CONFigure:PERCent:NRINging ................................... 104
CONFigure:PERCent:POVershoot ................................ 105
CONFigure:PERCent:PPReshoot................................... 106
CONFigure:PERCent:PRINging.................................... 107
CONFigure:PERiod ................................................. 32, 108
CONFigure:PWIDth................................................. 33, 109
CONFigure:RISE:TIMe ........................................... 33, 110
CONFigure:RTIMe .................................................. 33, 110
CONFigure:SAR:TIMe.................................................. 111
CONFigure:SAR:TIMe? ................................................ 112
CONFigure:VOLTage:AMPLitude.......................... 33, 113
CONFigure:VOLTage:HIGH................................... 33, 114
CONFigure:VOLTage:LOW.................................... 33, 115
CONFigure:VOLTage:MAXimum .......................... 33, 116
CONFigure:VOLTage:MEAN................................. 33, 117
CONFigure:VOLTage:MINimum............................ 33, 118
CONFigure:VOLTage:NOVershoot ........................ 33, 119
CONFigure:VOLTage:NPReshoot........................... 33, 120
CONFigure:VOLTage:NRINging.................................. 121
CONFigure:VOLTage:POVershoot ......................... 33, 122
195
VXI Technology, Inc.
CONFigure:VOLTage:PPReshoot............................33, 123
CONFigure:VOLTage:PRINging ...................................124
CONFigure:VOLTage:PTPeak.................................33, 125
CONFigure:VOLTage:RMS.....................................33, 126
CONFigure?................................................................33, 94 connectors.........................................................................16
CONTrol:IPOWer?...................................................33, 127
D data acquisition .................................................................13 dc accuracy .......................................................................17
DSO ...11, 14, 16, 34, 95, 131, 132, 134, 135, 136, 137, 169 dynamic characteristic specifications................................17
E environmental specifications ............................................18 external arm ......................................................................18 external clock impedance..................................................18
EXTERNAL CLOCK INPUT ..........................................14 external clock maximum frequency ..................................18 external trigger..................................................................18
F
FETCh?.....................................................................33, 128 frequency flatness .............................................................17 front panel connectors.......................................................14 full-scale input ranges.......................................................16
G general specifications........................................................16
I
IF INPUT..........................................................................14
IFR............................................ 11, 14, 16, 34, 95, 131, 137
Impedance.........................................................................16
INITiate:DELay..............................................................129
INITiate[:IMMediate]...............................................33, 130
Input Coupling..................................................................16
INPut:COUPling.......................................................33, 131
INPut:FILTer:FREQuency .......................................34, 132
INPut:FILTer:STATe ...............................................34, 133
INPut:IMPedance .....................................................34, 134
INPut:OFFSet ...........................................................34, 135
INPut:RANGe ..........................................................34, 136
INPut:SOURce .........................................................34, 137
Installation ........................................................................19 integral non-linearity.........................................................17 internal clock accuracy .....................................................18 internal clock source .........................................................18
K keyword ......................................................................21, 22
L logical address ..................................................................20 low-pass filter ...................................................................17
M maximum pre-trigger samples ..........................................18
MEASure:FALL:TIMe? ...........................................34, 138
196
MEASure:FREQuency? ........................................... 34, 139
MEASure:NDUTy?.................................................. 34, 140
MEASure:NWIDth?................................................. 34, 141
MEASure:PDUTy? .................................................. 34, 142
MEASure:PERCent:NOVershoot?................................. 143
MEASure:PERCent:NPReshoot?................................... 144
MEASure:PERCent:NRINging? .................................... 145
MEASure:PERCent:POVershoot? ................................. 146
MEASure:PERCent:PPReshoot? ................................... 147
MEASure:PERCent:PRINging?..................................... 148
MEASure:PERiod? .................................................. 34, 149
MEASure:PWIDth? ................................................. 34, 150
MEASure:RISE:TIMe?............................................ 34, 151
MEASure:VOLTage:AMPLitude?........................... 34, 152
MEASure:VOLTage:HIGH?.................................... 34, 153
MEASure:VOLTage:LOW? .................................... 34, 154
MEASure:VOLTage:MAXimum? ........................... 34, 155
MEASure:VOLTage:MEAN?.................................. 34, 156
MEASure:VOLTage:MINimum?............................. 34, 157
MEASure:VOLTage:NOVershoot? ......................... 34, 158
MEASure:VOLTage:NPReshoot? ........................... 34, 159
MEASure:VOLTage:NRINging?................................... 160
MEASure:VOLTage:POVershoot? .......................... 34, 161
MEASure:VOLTage:PPReshoot? ............................ 35, 162
MEASure:VOLTage:PRINging? ................................... 163
MEASure:VOLTage:PTPeak? ................................. 35, 164
MEASure:VOLTage:RMS? ..................................... 35, 165 measurement function ...................................................... 18 memory ............................................................................ 16 memory segments............................................................. 16 message-based.................................................................. 21 missing codes ................................................................... 17
O offset adjustment .............................................................. 17 operating temperature....................................................... 18 operational status............................................................ 181 overvoltage protection...................................................... 17
P parameter.......................................................................... 22 power.......................................................................... 20, 40 power and cooling requirements ...................................... 18 programming language..................................................... 21
R
READ?..................................................................... 35, 166
Register Access Examples................................................ 24 resolution.......................................................................... 16
RMS noise........................................................................ 17
ROSCillator:FREQuency ......................................... 35, 167
ROSCillator:SOURce............................................... 35, 168
S
S/ [ N+D ] ............................................................................ 17
Sample Rate Resolution ................................................... 16
SAMPle:CLOCk:FREQuency.................................. 35, 169
SAMPle:CLOCk:SOURce ....................................... 35, 170
SCPI notation ................................................................... 22
SFDR................................................................................ 17 shared memory space ....................................................... 16
VM2601/2/3 Index
www.vxitech.com signal-to-noise plus distortion ratio...................................17 signal-to-noise ratio ..........................................................17
SNR ..................................................................................17 specifications ....................................................................17 spurious free dynamic range .............................................17
STATus:OPERation:CONDition? ............................36, 181
STATus:OPERation:ENABle...................................36, 182
STATus:OPERation[:EVENt]? ................................36, 183
STATus:PRESet .......................................................36, 184
STATus:QUEStionable:CONDition? .......................36, 185
STATus:QUEStionable:ENABle..............................36, 186
STATus:QUEStionable[:EVENt]? ...........................36, 187
SWEep:COUNt ........................................................35, 171
SWEep:POINts .........................................................35, 172
SWEep:TINTerval....................................................35, 173
SYNChronize:MODE...............................................35, 174
SYNChronize:STATe...............................................35, 175 syntax................................................................................21
SYSTem:ERRor?......................................................36, 188
SYSTem:VERSion? .................................................36, 189
T tree-structured language....................................................21 trigger source ....................................................................18
TRIGGER/GP0 INPUT ....................................................14
TRIGger:LEVel ........................................................35, 177
TRIGger:SLOPe .......................................................35, 178
TRIGger:SOURce.....................................................35, 179
TRIGger:STATe? .....................................................35, 180
TRIGger[:IMMediate] ..............................................35, 176
V
VMIP ................................................................................20 voltage specifications........................................................18
VXIbus .............................................................................21
VXI plug&play driver examples........................................26
W
WEEE .................................................................................8
VM2601/2/3 Index 197
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