VXI Technology VM 7510 DC Reference Standard, VM 2601 Digitizer User's Manual
Below you will find brief information for DC Reference Standard VM 7510, Digitizer VM 2601. The VM 7510 is a precision dc voltage standard designed to be used in conjunction with the VM 2601 digitizer. It provides a precision ±0.5 V signal to calibrate the VM 2601 beyond its native accuracy specification. The VM 7510 also offers signal-routing capabilities, allowing the user to select the measurement input, the internal precision dc source, or an external ac calibration source.
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VM7510
DC R
EFERENCE
S
TANDARD
U
SER
’
S
M
ANUAL
P/N: 82-0113-000
Released November 7, 2005
VXI Technology, Inc.
2031 Main Street
Irvine, CA 92614-6509
(949) 955-1894
bus
2
www.vxitech.com
T
ABLE OF
C
ONTENTS
I
NTRODUCTION
S
ECTION
S
ECTION
S
ECTION
VM7510 Preface 3
VXI Technology, Inc.
S
ECTION
I
NDEX
4 VM7510 Preface
www.vxitech.com
C
ERTIFICATION
VXI Technology, Inc. (VTI) 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.
VM7510 Preface 5
VXI Technology, Inc.
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
VXI Technology, Inc.
M
ANUFACTURER
’
S
A
DDRESS
P
RODUCT
N
AME
M
ODEL
N
UMBER
(
S
)
2031 Main Street
Irvine, California 92614-6509
DC Reference Standard
VM7510
P
RODUCT
O
PTIONS
P
RODUCT
C
ONFIGURATIONS
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
S
AFETY
according to the following specifications:
EMC
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
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.
November 2005
Steve Mauga, QA Manager
6 VM7510 Preface
www.vxitech.com
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:
Use Proper Power Cord
Use Proper Power Source
Use Proper Fuse
To avoid hazard, only use the power cord specified for this product.
To avoid electrical overload, electric shock or fire hazard, do not use a power source that applies other than the specified voltage.
To avoid fire hazard, only use the type and rating fuse specified for this product.
VM7510 Preface 7
VXI Technology, Inc.
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.
8 VM7510 Preface
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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
5425 Warner Road
Suite 13
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.
VM7510 Preface 9
VXI Technology, Inc.
10 VM7510 Preface
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S
ECTION
1
I
NTRODUCTION
O
VERVIEW
The VM7510 is a precision dc voltage standard which is designed to be used in conjunction with the VM2601 digitizer. The VM7510 provides a precision ±0.5 V signal which can be used to calibrate the VM2601 beyond its native accuracy specification. Additionally, the VM7510 provides signal-routing capabilities which allows the user to select either the measurement input, the internal precision dc source, or an external ac calibration source. A block diagram of the
VM7510 is provided in Figure 1-1.
SIGNAL INPUT
K1
AC REFERENCE
INPUT
K3
OUTPUT
PROGRAMMABLE
DC VOLTAGE
STANDARD
K2
50 OHM
CONTROL
LOGIC
F
IGURE
1-1: VM7510 B
LOCK
D
IAGRAM
VM7510 Introduction 11
VXI Technology, Inc.
12
VM2601
(see the
VM2601 User's
Manual
for front panel connector information.)
VM7510
ACC/ERR FAIL
J111
J112
J113
J114
J115
J116
ACC/ ERR
R3
FAIL
POS
ADJ
J1
R7
NEG
ADJ
J2
R10
ZERO
ADJ
J3
AC Reference In
Signal Input
Output
The multi-turn potentiometers at R3, R7, and R10 are used to adjust the signal from the output connector, J3. See the
Calibration
section for more information.
F
IGURE
1-2: F
RONT
P
ANEL
L
AYOUT
VM7510 Introduction
www.vxitech.com
S
PECIFICATIONS
S
IGNAL
I
NPUT AND
AC R
EFERENCE
I
NPUT
I
NSERTION
L
OSS
100 MHz
500 MHz
I
SOLATION
10 MHz
100 MHz
500 MHz
VSWR
100 MHz
< 0.2 dB
< 0.5 dB
< -80 dB
< -70 dB
< -65 dB
< 1.2:1
DC R
EFERENCE
O
UTPUT
V
OLTAGE
O
O
O
O
UTPUT
UTPUT
UTPUT
UTPUT
I
MPEDANCE
D
A
A
RIVE
CCURACY
DJUSTMENT
T
EMPERATURE
S
TABILITY
+1.000 V, 0.000 V, or -1.000 V into a high impedance load
+0.500 V, 0.000 V, or -0.500 V into a 50 Ω load
50 Ω
> 100 mA
±100 µV all output settings, into high impedance
±5.0 mV all output settings, into high impedance. Front panel accessible multi-turn potentiometer.
25 ppm/°C
L
ONG
T
ERM
S
TABILITY
50 ppm/yr
VM7510 Introduction 13
VXI Technology, Inc.
14 VM7510 Introduction
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S
ECTION
2
P
REPARATION FOR
U
SE
I
NSTALLATION
When the VM7510 is unpacked from its shipping carton, the contents should include the following items:
(1) VM7510 DC Reference Standard
(1) VM7510 DC Reference Standard User’s Manual (this manual)
The packaging and the VMIP carrier should be immediately inspected for damage upon receipt of the unit. The chassis/mainframe should be checked to ensure that it is capable of providing adequate power and cooling for the VM7510. Once the chassis is found adequate, the VM7510’s logical address and the backplane jumpers of the chassis should be configured prior to the
VM7510’s installation. After the chassis 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 zero.
C
ALCULATING
S
YSTEM
P
OWER AND
C
OOLING
R
EQUIREMENTS
The power and cooling requirements of the VM7510 are given in the Specifications section of
Section 1 of this manual. It is imperative that the chassis provide adequate power and cooling for
this module. Referring to the chassis User’s 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 might 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 will void the warranty on the instrument in question.
VM7510 Programming 15
VXI Technology, Inc.
S
ETTING THE
C
HASSIS
B
ACKPLANE
J
UMPERS
Please refer to the chassis User’s Manual for further details on setting the backplane jumpers.
S
ETTING THE
L
OGICAL
A
DDRESS
The logical address of the VM7510 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 a logic 1; switches pushed away from the ON legend will signify a 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.
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)
Switch
Position
3
4
5
1
2
6
7
8
Switch
Value
4
8
1
2
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 through 3.0). 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. As a result, switch positions 1 and 2 must always be set to the OFF position unless dynamic address configuration is used. Addresses of 4, 8, 12, 16, ...252 are the only permissible addresses. 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.
16 VM7510 Command Dictionary
www.vxitech.com
S
ECTION
3
P
ROGRAMMING
I
NTRODUCTION
This section presents the instrument command set. It includes an alphabetical list of all the commands supported by the VM7510 divided into three sections: IEEE 488.2 commands, the instrument specific SCPI (Standard Commands for Programmable Instruments) commands, and the required SCPI commands. Each command has a brief description of its function, indicates if
its value are affected by the *RST command, and provides its default value.
Each command is described in detail, one per page. The description is presented in a regular, didactic manner to assist 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.
P
ROGRAMMING
The VM7510 is a VXIbus message-based device whose command set is compliant with the SCPI programming language. SCPI is a tree-structured language based on IEEE-STD-488.2 specifications. Based on this structure, the IEEE-STD-488.2 standard and device-dependent commands may have multiple branches from a trunk without repeating the trunk. To use this facility, terminate each branch with a semicolon. As an example, CONDition?, ENABle, and
EVENt? are all branches off the STATus:OPERation trunk and can be combined as follows:
STATus:OPERation:CONDition?;ENABle <NRf>;EVENt?
The above command is the same as the three commands:
STATus:OPERation:CONDition?
STATus:OPERation:ENABle
STATus:OPERation:EVENt?
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. See
Standard Commands for Programmable Instruments (SCPI), Volume 1: Syntax & Style, Section 6 for more information.
VM7510 Programming 17
VXI Technology, Inc.
The SCPI commands in this section are listed in upper and lower case to indicate different forms of the same command. Keywords may have both a short form and a long form (some commands, however, only have one form). The short form utilizes the uppercase keyword characters. The long form uses both the uppercase and lowercase keyword characters. Either form is acceptable.
Note, however, that there are no intermediate forms. All characters from the short and long form of the command must be used. Short forms and long forms may be freely intermixed. The actual commands sent can be in uppercase, lowercase, or the cases may be mixed (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:
CALibration:SECure:CODE <string>
CALibration:SECure:CODE <string> calibration:secure:code <string>
CAL:SECure:CODE <string>
CAL:SEC:CODE <string> cal:sec:code <string>
The following command is not correct because it includes characters in addition to those used in the short form of CALibrate:
calib:sec:code <string>
(incorrect syntax – additional “ib” - only cal or calibration is correct)
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.
N
OTATION
Keywords or parameters enclosed in square brackets ([]) are optional. If the optional part is a keyword, the keyword may be included or omitted. Omitting an optional parameter will cause its default to be used.
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.
A
LPHABETICAL
C
OMMAND
L
ISTING
The following tables provide an alphabetical listing of each command supported by the VM7510 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 default column indicates the value of each command’s setting when the unit is powered up or when a *RST command is executed.
In order for CALibration commands/queries to be executed, calibration security must be turned off. If security is not turned off, a “-203, ‘Command protected; Can't query security code with
secure state on’” error will be returned. See the CALibration:SECure:CODE command for
information on calibration security.
18 VM7510 Programming
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T
ABLE
3-1: IEEE 488.2
C
OMMON
C
OMMANDS
Command
Description
Clear the Status Register.
Set 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
Reset 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 and queries
Command
T
ABLE
3-2: I
NSTRUMENT
S
PECIFIC
SCPI C
OMMANDS
Description
Sets the calibration security password.
Sets or clears the security state of the instrument
Loads firmware updates into a module
Selects the signal to route to the output
Selects the dc reference output voltage
T
ABLE
3-3: SCPI R
EQUIRED
C
OMMANDS
*RST *RST Value
X
X
N/A
N/A
N/A
0
N/A
N/A
N/A
N/A
N/A
N/A
*RST *RST Value
X
X
X
N/A
Secure
Ground
Zero
Command Description
STATus:OPERation:CONDition? Query the Operation Status Condition Register.
Sets the Operation Status Enable Register.
Query the Operation Status Event Register.
Presets the Status Register.
Query the Questionable Status Condition Register
Sets the Questionable Status Enable Register.
Query the Questionable Status Event Register
Query the Error Queue
Query the version of the SCPI standard to which module complies.
*RST *RST Value
X
X
X
X
X
X
X
X Clears queue
N/A
VM7510 Programming 19
VXI Technology, Inc.
C
OMMAND
D
ICTIONARY
Purpose
Describes the purpose of the command.
Type
Describes the type of command such as an event or setting.
Command Syntax
Details the exact command format.
Command Parameters
Describes the parameters sent with the command and their legal range.
Reset Value
Describes the values assumed when the *RST command is sent.
Query Syntax
Details the exact query form of the command.
Query Parameters
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
Describes the format of the query response and the valid range of output.
Description
Describes in detail what the command does and refers to additional sources.
Examples
Present the proper use of each command and its query (when available).
Related Commands
Lists commands that affect the use of this command or commands that are affected by this command.
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:
20 VM7510 Programming
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IEEE 488.2
C
OMMON
C
OMMANDS
*CLS
Purpose
Clears the Status Register.
Type
IEEE 488.2 Common Command
Command Syntax
*CLS
Command Parameters
None
*RST Value
Query Syntax
Query Parameters
Query Response
Description
*RST performs all the functions of *CLS
None - command only
N/A
N/A
This command clears all event registers, clears the *OPC flag and clears all queues
(except the output queue).
Examples
Related Commands
Command / Query
*CLS
None
Response (Description)
(Clears all status and event registers)
VM7510 Programming 21
VXI Technology, Inc.
*ESE
Purpose
Sets the bits of the Event Status Enable Register
Type
IEEE 488.2 Common Command
Command Syntax
*ESE <mask>
Command Parameters
<mask> = numeric ASCII value from 0 to 255
*RST Value
N/A
Query Syntax
*ESE?
Query Parameters
Query Response
Description
None
Numeric ASCII value from 0 to 255
The Event Status Enable 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 ESB (Event Status Bit) in the Status Byte by the corresponding bit in the ESR. If
the ESB is set in the SRE register then an interrupt will be generated. See the *ESR?
command for details regarding the individual bits. The ESE register layout is:
Bit 0 - Operation Complete
Bit 1 - Request Control (not used in the VM7510)
Bit 2 - Query Error
Bit 3 - Device Dependent Error (not used in the VM7510)
Bit 4 - Execution Error
Bit 5 - Command Error
Bit 6 - User Request (not used in the VM7510)
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)
22 VM7510 Programming
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*ESR?
Purpose
Queries and clears the Standard Event Status Register
Type
IEEE 488.2 Common Command
Command Syntax
None – query only
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 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 ESB (Event Status Bit) in the Status Byte. The layout of the ESR is:
Bit 0 - Operation Complete
Bit 1 - Request Control (not used in the VM7510, always 0)
Bit 2 - Query Error
Bit 3 - Device Dependent Error (not used in the VM7510, always 0)
Bit 4 - Execution Error
Bit 5 - Command Error
Bit 6 - User Request (not used in the VM7510, always 0)
Bit 7 - Power On
The Operation Complete bit is set by the VM7510 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. See the section in the manual covering Error Messages for a list of execution error. Errors that range from -200 to -299 are execution errors.
The Command Error bit is set when a command error is detected. See the section in this manual covering Error Messages for a list of command errors. 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 (Description)
4
Related Commands
*ESE
VM7510 Programming 23
VXI Technology, Inc.
*IDN?
Purpose
Queries the module for its identification string
Type
IEEE 488.2 Common Command
Command Syntax
None – query only
Command Parameters
N/A
*RST Value
N/A
Query Syntax
Query Parameters
*IDN?
None
Query Response
Description
ASCII character string
The Identification query returns the identification string of the VM7510 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
None
Response (Description)
VXI Technology, Inc.,VM7510,0,1.0
(The revision listed here is for reference only; the response will always be the current revision
of the instrument.)
24 VM7510 Programming
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*OPC
Purpose
Sets the OPC bit in the Event Status Register
Type
IEEE 488.2 Common Command
Command Syntax
*OPC
Command Parameters
None
*RST Value
N/A
Query Syntax
Query Parameters
*OPC?
None
Query Response
Description
1
The Operation Complete command sets the OPC bit in the Event Status Register when all pending operations have completed. The Operation Complete 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)
VM7510 Programming 25
VXI Technology, Inc.
*RST
Purpose
Resets the module’s hardware and software to a known state
Type
IEEE 488.2 Common Command
Command Syntax
*RST
Command Parameters
None
*RST Value
N/A
Query Syntax
Query Parameters
None
N/A
Query Response
Description
N/A
The Reset 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 set by this command.
Examples
Related Commands
Command / Query
*RST
None
Response (Description)
(Resets the module)
26 VM7510 Programming
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*SRE
Purpose
Type
Command Syntax
Command Parameters
<mask> =numeric ASCII value from 0 to 255
*RST Value
None – Required parameter
Query Syntax
*SRE?
Query Parameters
Query Response
Description
None
Numeric ASCII value from 0 to 255
The service request enable 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? Command 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.
Bit 0 - Latch Event
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 - Master Summary Status
Bit 7 - Operation Status Summary
Examples
Set the service request enable register
IEEE 488.2 Common Command
*SRE <mask>
Command / Query
*SRE 4
Response (Description)
(Sets the service request enable register)
Related Commands
*SRE?
*STB
4 (Returns the value of the SRE register)
VM7510 Programming 27
VXI Technology, Inc.
*STB?
Purpose
Queries the Status Byte Register
Type
IEEE 488.2 Common Command
Command Syntax
None – query only
Command Parameters
N/A
*RST Value
N/A
Query Syntax
Query Parameters
*STB?
None
Query Response
Description
Numeric ASCII value from 0 to 255
The Read Status Byte 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:
Bit 0 - Latched Event
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 - Master Summary Status
Bit 7 - Operation Status Summary
Examples
Related Commands
Command / Query
*STB?
None
Response (Description)
16 (Queries the Status Byte Register)
28 VM7510 Programming
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*TRG
Purpose
Causes a trigger event to occur
Type
IEEE 488.2 Common Command
Command Syntax
*TRG
Command Parameters
None
*RST Value
N/A
Query Syntax
Query Parameters
None
N/A
Query Response
Description
N/A
The Trigger command causes a trigger event to occur. This command is not used for this module and is provided for SCPI compliance only.
Examples
Related Commands
Command / Query
*TRG
None
Response (Description)
(Triggers an event)
VM7510 Programming 29
VXI Technology, Inc.
*TST?
Purpose
Causes a self-test procedure to occur and queries the result
Type
IEEE 488.2 Common Command
Command Syntax
None – query only
Command Parameters
N/A
*RST Value
N/A
Query Syntax
Query Parameters
*TST?
None
Query Response
Description
Numeric ASCII value
The Self-Test query causes the VM7510 to run its self-test procedures and report on the results.
A value of 0 indicates that the test passed.
Examples
Related Commands
Command / Query
*TST?
None
Response (Description)
0 (Begins the self-test procedure returns the result)
30 VM7510 Programming
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*WAI
Purpose
Halts execution of commands and queries until the No Operation Pending message is true
IEEE 488.2 Common Command
Type
*RST Value
Command Syntax
Command Parameters
None
*WAI
N/A
Query Syntax
None
Query Parameters
N/A
Query Response
Description
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 processing. It provides a way of synchronizing the module with its master.
Examples
Related Commands
Command / Query
*WAI
*OPC
Response (Description)
(Pauses the execution of additional commands until the No Operation Pending message is true.)
VM7510 Programming 31
VXI Technology, Inc.
I
NSTRUMENT
S
PECIFIC
SCPI C
OMMANDS
CALibration:SECure:CODE
Purpose
Type
Sets the calibration security password.
Setting
CALibration:SECure:CODE <string>
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
N/A
Query Syntax
Query Parameters
CALibration:SECure:CODE <string>?
N/A
Query Response
Description
Returns the set value of the <string> parameter
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.
Before shipping the instrument, the factory code setting is VM7510.
Examples
Related Commands
Command / Query
CAL:SEC:CODE #16VM7510
CALibration:SECure:STATe
Response (Description)
(Sets the factory code setting of VM7510)
32 VM7510 Programming
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CALibration:SECure:STATe
Purpose
Type
Command Syntax
Enable or disable the calibration security.
Setting
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> = 1
CALibration:SECure:STATe?
N/A
0 | 1
The module powers up with the secure state enabled. While security is on, no stores to non-volatile memory are allowed. This command turns the state on or off. In order to disable the security state, the current security code must be supplied. To turn on security, code does not need to be supplied. If it is supplied the code is checked. The security code must be supplied in IEEE-488.2 definite or indefinite length arbitrary block format.
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:STAT OFF,#16VM7510
CAL:SEC:STAT 1
CAL:SEC:STAT?
CALibration:SECure:CODE
Response (Description)
(Disables calibration security)
(Turns the calibration security back on)
1 (Indicates that calibration security is enabled)
VM7510 Programming 33
VXI Technology, Inc.
DOWNLOAD
Purpose
Type
Command Syntax
Loads firmware updates into a module
Event
DOWNLOAD <section>
Command Parameters
<section> = 0 | 1 | 2 | 3
0 is for the VMIP base code
1 is for the module in the top position
2 is for the module in the middle position
3 is for the module in the bottom position
*RST Value
Query Syntax
Query Parameters
Query Response
Description
N/A
N/A
None
N/A
Firmware for VMIP cards is stored in FLASH memory which can be updated in the field. Each card has at least 4 separate areas where firmware is stored. This command is used to update one area of the firmware. To update a module, do the following:
1. Obtain the proper HEX file from the factory.
2. Send the DOWNLOAD command with the appropriate <section>.
3. Send each line of the HEX file to the module (one line at a time).
4. Wait at least 15 seconds after the last line of the HEX file is sent.
5. Turn power to the module off.
6. Turn power back on and perform normal start up operations.
If more than one module needs to be updated, repeat the procedure for each section to be updated.
Examples
Related Commands
Improper use of this command can completely disable the instrument.
NOTE: This command can only be used on the module in the top position. If there is no module in the top position, the command is sent to a dummy application.
The top module/application always has an address that is an integer multiple of 4.
Even though the command and the HEX file are always sent to the top module/application, the module corresponding to the <section> is the one that is updated.
Command / Query
DOWNLOAD 1
S0...
:
S8...
None
Response (Description)
(First line of HEX file)
(Last line of HEX file)
34 VM7510 Programming
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SOURce[:ROUTe] / ROUTe
Purpose
Type
Command Syntax
Selects the signal to be routed to the output jack.
Setting
SOURce[:ROUTe] <string> or
ROUTe <string>
Command Parameters
<string> = SIGnal | ACRef | DCRef | GND
*RST Value
SIG
Query Syntax
SOURce[:ROUTe]? or
ROUTe?
Query Parameters
N/A
Query Response
Returns: SIG | ACR | DCR | GND
Description
The SOURce[:ROUTe] route command selects the signal source for the output jack.
ROUTe can also be used to execute this command.
Examples
Related Commands
Command / Query
SOUR SIG
SOUR?
ROUTe
Response (Description)
(Selects the Signal input to be routed to the
Output jack).
SIG (Indicates the Signal input is routed to
the output jack).
VM7510 Programming 35
VXI Technology, Inc.
VOLTage[:LEVel] / LEVel
Purpose
Type
Command Syntax
Sets the dc reference output voltage level
Setting
VOLTage[:LEVel] <value> or
LEVel <value>
Command Parameters
<value> = POSitive | NEGative | ZERo
*RST Value
N/A
Query Syntax
VOLTage[:LEVel]? or
LEVel?
Query Parameters
N/A
Query Response
Description
<value> = POS | NEG | ZERO
The VOLTage[:LEVel] command sets the output of the dc reference standard to either the positive, negative, or zero voltage level.
LEVel can also be used to execute this command.
Examples
Related Commands
Command / Query
VOLT POS
VOLT?
LEVel
Response (Description)
(Sets the dc reference output to the positive output level)
POS (Indicates the dc reference is set for a
positive voltage output)
36 VM7510 Programming
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R
EQUIRED
SCPI C
OMMANDS
STATus:OPERation:CONDition?
Purpose
Type
Queries the Operation Status Condition Register
Required SCPI command
Command Syntax
None – query only
Command Parameters
N/A
*RST Value
Query Syntax
Query Parameters
Query Response
Description
N/A
STATus:OPERation:CONDition?
None
0
The Operation Status Condition Register query is provided for SCPI compliance only.
The VM7510 does not alter the state of any of the bits in this register and always reports a 0.
Examples
Related Commands
Command / Query
STAT:OPER:COND?
None
Response (Description)
0
VM7510 Programming 37
VXI Technology, Inc.
STATus:OPERation:ENABle
Purpose
Type
Command Syntax
Sets the Operation Status 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
STATus:OPERation:ENABle?
Query Parameters
None
Query Response
Numeric ASCII value from 0 to 32767
Description
The Operation Status Enable Register is included for SCPI compatibility and the
VM7510 does not alter any of the bits in this register. The register layout is as follows:
Bit 0 - Calibrating
Bit 1 - Setting
Bit 2 - Ranging
Bit 3 - Sweeping
Bit 4 - Measuring
Bit 5 - Waiting for trigger
Bit 6 - Waiting for arm
Bit 7 - Correcting
Examples
Related Commands
Command / Query
STAT:OPER:ENAB 0
None
Response (Description)
0
38 VM7510 Programming
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STATus:OPERation[:EVENt]?
Purpose
Type
Queries the Operation Status Event Register
Required SCPI command
Command Syntax
None – query only
Command Parameters
N/A
*RST Value
Query Syntax
Query Parameters
Query Response
Description
N/A
STATus:OPERation [:EVENt]?
None
0
The Status Operation Event Register query is included for SCPI compliance. The
VM7510 does not alter any of the bits in this register and always reports a 0.
Examples
Related Commands
Command / Query
STAT:OPER?
None
Response (Description)
VM7510 Programming 39
VXI Technology, Inc.
STATus:PRESet
Purpose
Type
Presets the Status Registers
Required SCPI command
Command Syntax
STATus:PRESet
Command Parameters
None
*RST Value
Query Syntax
Query Parameters
Query Response
Description
N/A
None – command only
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
None
Response (Description)
(Presets the Status Registers)
40 VM7510 Programming
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STATus:QUEStionable:CONDition?
Purpose
Type
Queries the Questionable Status Condition Register
Required SCPI command
Command Syntax
None – query only
Command Parameters
N/A
*RST Value
Query Syntax
Query Parameters
Query Response
Description
N/A
STATus:QUEStionable:CONDition?
None
0
The Questionable Status Condition Register query is provided for SCPI compliance only. The VM7510 does not alter any of the bits in this register and a query always reports a 0.
Examples
Related Commands
Command / Query
STAT:QUES:COND?
None
Response (Description)
0
VM7510 Programming 41
VXI Technology, Inc.
Purpose
Type
Command Syntax
Command Parameters
*RST Value
Query Syntax
Query Parameters
Query Response
Description
STATus:QUEStionable:ENABle
Sets the Questionable Status Enable Register
Required SCPI command
STATus:QUEStionable:ENABle <NRf>
<NRf> = numeric ASCII value from 0 to 32767
NRf must be supplied
STATus:QUEStionable:ENABle?
None
Numeric ASCII value from 0 to 32767
The Status Questionable Enable command sets the bits in the Questionable Status
Enable Register. This command is provided only to comply with the SCPI standard.
The Status Questionable Enable query reports the contents of the Questionable Status
Enable Register. The VM7510 does not alter the bit settings of this register and will report the last programmed value.
Examples
Related Commands
Command / Query
STAT:QUES:ENAB 64
STAT:QUES:ENAB?
None
Response (Description)
64
42 VM7510 Programming
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STATus:QUEStionable[:EVENt]
Purpose
Type
Queries the Questionable Status Event Register
Required SCPI command
Command Syntax
None – query only
Command Parameters
N/A
*RST Value
Query Syntax
Query Parameters
Query Response
Description
N/A
STATus:QUEStionable [:EVENt]?
None
0
The Questionable Status Event Register is provided for SCPI compliance only. The
VM7510 does not alter the bits in this register and queries always report a 0.
Examples
Related Commands
Command / Query
STAT:QUES?
None
Response (Description)
0
VM7510 Programming 43
VXI Technology, Inc.
SYSTem:ERRor?
Purpose
Type
Queries the Error Queue
Required SCPI command
Command Syntax
None – query only
Command Parameters
N/A
*RST Value
Query Syntax
Query Parameters
Query Response
Description
N/A
SYSTem:ERRor?
None
ASCII string
The System Error query is used to retrieve error messages from the error queue. The error queue will maintain the 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.
Refer to the Error Messages section of this manual for specific details regarding the
reported errors.
Examples
Related Commands
Command / Query
SYST:ERR?
None
Response (Description)
-310, "System error; Unrecognized MUX setting"
44 VM7510 Programming
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SYSTem:VERSion?
Purpose
Type
Queries the SCPI version number to which the VM7510 complies
Required SCPI command
Command Syntax
None – query only
Command Parameters
N/A
*RST Value
Query Syntax
Query Parameters
Query Response
Description
N/A
SYSTem:VERSion?
None
Numeric ASCII value
The System Version query reports version of the SCPI standard to which the VM7510 complies.
Examples
Related Commands
Command / Query
SYST:VERS?
None
Response (Description)
1994.0
VM7510 Programming 45
VXI Technology, Inc.
E
RROR
M
ESSAGES
Should an error occur while commands are being sent to the VM7510, the following error messages may appear. These messages are in compliance with SCPI standards and can be
retrieved by using the SYSTem:ERRor? query.
-101, "Invalid character; Internal error, please contact factory"
-109, "Missing Parameter value"
-160, "Block data error; Block length was non-numeric"
-160, "Block data error; Character after # wasn't a digit"
-161, "Invalid block data; Expected more data than what was supplied"
-200, "Execution error; Failed reading EEPROM."
-200, "Execution error; Failed writing EEPROM."
-203, "Command protected; Can't change security code with secure state on"
-203, "Command protected; Can't query security code with secure state on"
-221, "Settings conflict; DOWNLOAD can only be used by the top module"
-222, "Data out of range; Valid OPER:ENAB values are 0 to 32767"
-222, "Data out of range; Valid sections are 0 to 3"
-223, "Too much data; Security buffer full"
-224, "Illegal parameter value"
-310, "System error; Unrecognized MUX setting"
46 VM7510 Programming
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S
ECTION
4
C
ALIBRATION
R
EQUIRED
E
QUIPMENT
The following equipment is required for the VM7510 calibration procedure:
• VXIbus chassis (VXI Technology CT-100B or equivalent)
• VXIbus slot 0 controller (National Instruments MXI-2 controller or equivalent)
• Desktop Computer (PC with Window XP or equivalent)
• 6 ½ digit voltmeter (Keithley 2000 or equivalent)
• SMB plug to dual banana plug cable
• Small flat blade screwdriver
• VM7510 plug&play drivers and soft front panel
P
ROCEDURE
The following procedure can be used to calibrate the VM7510:
1) Remove the cables attached to J1, J2, and J3.
2) Install the VM7510 into the VXIbus chassis.
3) Set the DMM to the 2 V dc range and connect the DMM to J3 of the VM7510.
4) Run the resource manager and open the VM7510 soft front panel.
5) Allow the setup to stabilize thermally for 30 min.
6) Using the soft front panel, select ground as the input source, and zero the DMM by pressing the “relative” button on its front panel. This removes any thermal offsets in the calibration cabling.
7) Using the soft front panel, select the DC Reference as the input source and select POS as the reference output. Adjust R3 on the VM7510 front panel for as close to 1.000000 V as possible. Then, select the reference output to NEG and adjust R7 on the front panel for as close to -1.000000 V as possible. Note that the R3 will affect the NEG output voltage, but R7 will not affect the POS output. Now, select ZERO for the reference output and adjust R10 on the front panel to as close to 0.000000 V as possible.
The VM7510 is now calibrated.
VM7510 Calibration 47
VXI Technology, Inc.
48 VM7510 Calibration
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I
NDEX
Symbols
*CLS.................................................................................21
*ESE...........................................................................22, 23
*ESR? ...............................................................................23
*IDN? ...............................................................................24
*OPC ....................................................................23, 25, 31
*RST.................................................................................26
*SRE.................................................................................27
*STB? .........................................................................27, 28
*TRG ................................................................................29
*TST.................................................................................30
*WAI ..........................................................................25, 31
B
backplane..........................................................................17 backplane jumpers ......................................................15, 16 block diagram ...................................................................11
C
calibration .........................................................................47
CALibration:SECure:CODE ............................................32
CALibration:SECure:STATe............................................33 clear ..................................................................................21 command set .....................................................................17 cooling ..............................................................................15
D
declaration of conformity ...................................................6 default parameter ..............................................................26
DOWNLOAD...................................................................34 dynamic address configuration .........................................16
E
errror messages .................................................................46
F
FLASH memory ...............................................................34 front panel.........................................................................12
I
installation ........................................................................15
K
keyword ............................................................................18
L
LEVel............................................................................... 36 logical address............................................................ 15, 16
M
message-based.................................................................. 17
P
parameter.......................................................................... 18 parameters ........................................................................ 17 power................................................................................ 15 programming.................................................................... 17 programming language..................................................... 17
R
ROUTe............................................................................. 35
S
SOURce[:ROUTe] ..................................................... 19, 35 specifications.................................................................... 13
STATus:OPERation:CONDition?.................................... 37
STATus:OPERation:ENABle .......................................... 38
STATus:OPERation[:EVENt]?........................................ 39
STATus:PRESet............................................................... 40
STATus:QUEStionable:CONDition?............................... 41
STATus:QUEStionable:ENABle ..................................... 42
STATus:QUEStionable[:EVENt]..................................... 43 support resources................................................................ 9 syntax ............................................................................... 17
SYSTem:ERRor? ............................................................. 44
SYSTem:VERSion? ......................................................... 45
T
tree-structured language ................................................... 17
V
VOLTage[:LEVel] ..................................................... 19, 36
VXIbus....................................................................... 15, 17
W
WEEE ................................................................................ 7
VM7510 Index 49
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Key features
DC voltage standard
Precision ±0.5V signal
Signal-routing capabilities
Calibration beyond native accuracy
Internal precision DC source
External AC calibration source
VM 2601 compatibility
VXIbus message-based device
SCPI programming language compliant
Self-test procedures
Frequently asked questions
The VM 7510 is a precision dc voltage standard designed to be used with the VM 2601 digitizer to calibrate it beyond its native accuracy specification.
The VM 7510 allows the user to select the measurement input, the internal precision dc source, or an external ac calibration source.
The VM 7510 provides a precision ±0.5 V signal to calibrate the VM 2601, enhancing its accuracy beyond its native specification.
The VM 7510 has an output accuracy of ±100 µV for all output settings, measured into a high impedance load.
The VM 7510 can provide an output drive current greater than 100 mA.
