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3152A
PRECISION PLL
SYNTHESIZER
User Manual
Publication No. 980867 Rev. A
Astronics Test Systems Inc.
4 Goodyear, Irvine, CA 92618
Tel: (800) 722-2528, (949) 859-8999; Fax: (949) 859-7139
[email protected] [email protected]
[email protected] http://www.astronicstestsystems.com
Copyright 2001 by Astronics Test Systems Inc. Printed in the United States of America. All rights reserved.
This book or parts thereof may not be reproduced in any form without written permission of the publisher.
THANK YOU FOR PURCHASING THIS
ASTRONICS TEST SYSTEMS PRODUCT
For this product, or any other Astronics Test Systems product that incorporates software drivers,
you may access our web site to verify and/or download the latest driver versions. The web address
for driver downloads is:
http://www.astronicstestsystems.com/support/downloads
If you have any questions about software driver downloads or our privacy policy, please contact us
at:
[email protected]
WARRANTY STATEMENT
All Astronics Test Systems products are designed to exacting standards and manufactured in full
compliance to our AS9100 Quality Management System processes.
This warranty does not apply to defects resulting from any modification(s) of any product or part
without Astronics Test Systems express written consent, or misuse of any product or part. The
warranty also does not apply to fuses, software, non-rechargeable batteries, damage from battery
leakage, or problems arising from normal wear, such as mechanical relay life, or failure to follow
instructions.
This warranty is in lieu of all other warranties, expressed or implied, including any implied warranty
of merchantability or fitness for a particular use. The remedies provided herein are buyer’s sole and
exclusive remedies.
For the specific terms of your standard warranty, contact Customer Support. Please have the
following information available to facilitate service.
1. Product serial number
2. Product model number
3. Your company and contact information
You may contact Customer Support by:
E-Mail:
[email protected]
Telephone:
+1 800 722 3262
(USA)
Fax:
+1 949 859 7139
(USA)
RETURN OF PRODUCT
Authorization is required from Astronics Test Systems before you send us your product or subassembly for service or calibration. Call or contact Customer Support at 1-800-722-3262 or 1-949859-8999 or via fax at 1-949-859-7139. We can also be reached at: [email protected]
If the original packing material is unavailable, ship the product or sub-assembly in an ESD shielding
bag and use appropriate packing materials to surround and protect the product.
PROPRIETARY NOTICE
This document and the technical data herein disclosed, are proprietary to Astronics Test Systems,
and shall not, without express written permission of Astronics Test Systems, be used in whole or in
part to solicit quotations from a competitive source or used for manufacture by anyone other than
Astronics Test Systems. The information herein has been developed at private expense, and may
only be used for operation and maintenance reference purposes or for purposes of engineering
evaluation and incorporation into technical specifications and other documents which specify
procurement of products from Astronics Test Systems.
TRADEMARKS AND SERVICE MARKS
All trademarks and service marks used in this document are the property of their respective owners.
•
Racal Instruments, Talon Instruments, Trig-Tek, ActivATE, Adapt-A-Switch, N-GEN, and PAWS are
trademarks of Astronics Test Systems in the United States.
DISCLAIMER
Buyer acknowledges and agrees that it is responsible for the operation of the goods purchased and
should ensure that they are used properly and in accordance with this document and any other
instructions provided by Seller. Astronics Test Systems products are not specifically designed,
manufactured or intended to be used as parts, assemblies or components in planning, construction,
maintenance or operation of a nuclear facility, or in life support or safety critical applications in
which the failure of the Astronics Test Systems product could create a situation where personal
injury or death could occur. Should Buyer purchase Astronics Test Systems product for such
unintended application, Buyer shall indemnify and hold Astronics Test Systems, its officers,
employees, subsidiaries, affiliates and distributors harmless against all claims arising out of a claim
for personal injury or death associated with such unintended use.
FOR YOUR SAFETY
Before undertaking any troubleshooting, maintenance or exploratory procedure, read carefully the
WARNINGS and CAUTION notices.
This equipment contains voltage hazardous to
human life and safety, and is capable of
inflicting personal injury.
If this instrument is to be powered from the AC line (mains) through an
autotransformer, ensure the common connector is connected to the neutral (earth
pole) of the power supply.
Before operating the unit, ensure the conductor (green wire) is connected to the
ground (earth) conductor of the power outlet. Do not use a two-conductor extension
cord or a three-prong/two-prong adapter. This will defeat the protective feature of the
third conductor in the power cord.
Maintenance and calibration procedures sometimes call for operation of the unit with
power applied and protective covers removed. Read the procedures and heed
warnings to avoid “live” circuit points.
Before operating this instrument:
1. Ensure the proper fuse is in place for the power source to operate.
2. Ensure all other devices connected to or in proximity to this instrument are properly
grounded or connected to the protective third-wire earth ground.
If the instrument:
-
fails to operate satisfactorily
shows visible damage
has been stored under unfavorable conditions
has sustained stress
Do not operate until performance is checked by qualified personnel.
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3152A User Manual
Table of Contents
Chapter 1 .......................................................................................................................... 1-1
GETTING STARTED .................................................................................................................. 1-1
What’s In This Chapter ............................................................................................................. 1-1
Introduction .............................................................................................................................. 1-2
Options ................................................................................................................................. 1-3
Safety Considerations .............................................................................................................. 1-4
Supplied Accessories ............................................................................................................... 1-4
Specifications ........................................................................................................................... 1-4
Functional Description .............................................................................................................. 1-5
Input and Output Connectors.................................................................................................... 1-5
Main Output .............................................................................................................................. 1-5
SYNC Output............................................................................................................................ 1-5
External Clock Input ................................................................................................................. 1-5
PM Input ................................................................................................................................... 1-7
Trigger Input ............................................................................................................................. 1-7
Operating Modes .................................................................................................................. 1-7
Continuous Mode .............................................................................................................. 1-7
Triggered Mode ................................................................................................................. 1-7
Burst Mode ........................................................................................................................ 1-8
Gated Mode ...................................................................................................................... 1-8
Output Type .......................................................................................................................... 1-8
Standard Waveforms ......................................................................................................... 1-9
Arbitrary Waveforms .......................................................................................................... 1-9
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Sequenced Waveforms ..................................................................................................... 1-9
Sweep Waveforms .......................................................................................................... 1-11
Output State ....................................................................................................................... 1-11
Backplane Synchronization ................................................................................................. 1-11
Front-Panel PLL.................................................................................................................. 1-12
Frequency Counter ............................................................................................................. 1-12
Phase Modulation ............................................................................................................... 1-12
Filter ................................................................................................................................... 1-12
Front Panel Indicators ......................................................................................................... 1-13
Programming The 3152A .................................................................................................... 1-13
Chapter 2 .......................................................................................................................... 2-1
CONFIGURING THE INSTRUMENT .......................................................................................... 2-1
Installation Overview ................................................................................................................ 2-1
Unpacking and Initial Inspection ............................................................................................... 2-1
Safety Precautions ................................................................................................................... 2-1
Performance Checks ................................................................................................................ 2-2
Grounding Requirements.......................................................................................................... 2-2
Long Term Storage or Repackaging For Shipment ................................................................... 2-3
Preparation For Use ................................................................................................................. 2-3
Logical Address Selection ........................................................................................................ 2-4
Emulation Mode Selection ........................................................................................................ 2-4
Address Space Selection.......................................................................................................... 2-4
Installation ................................................................................................................................ 2-6
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Chapter 3 .......................................................................................................................... 3-1
USING THE INSTRUMENT ........................................................................................................ 3-1
Overview .................................................................................................................................. 3-1
Output Termination ................................................................................................................... 3-1
Input/Output Protection ............................................................................................................. 3-1
Power On/Reset Defaults ......................................................................................................... 3-1
What To Do Now ...................................................................................................................... 3-2
Using the APPLy Command .............................................................................................. 3-4
Output Configuration Commands ............................................................................................. 3-8
Selecting an Output Function Type ....................................................................................... 3-8
Selecting a Standard Function Shape ................................................................................... 3-9
Changing the Frequency and Sample Clock ......................................................................... 3-9
Selecting the Sample Clock Source .................................................................................... 3-10
Programming the Output Amplitude and Offset ................................................................... 3-11
Selecting the Filter Type ..................................................................................................... 3-11
Activating the Backplane ECLTRG and TTLTRG Lines ...................................................... 3-12
Assigning the Validating Source For TTLTRG..................................................................... 3-13
Enabling the Main Output.................................................................................................... 3-14
Enabling the SYNC Output ................................................................................................. 3-14
Assigning the Source For The SYNC Output ...................................................................... 3-15
Selecting the SYNC Position............................................................................................... 3-16
Setting the Sync Pulse Width .............................................................................................. 3-16
Using the Built-In Standard Waveforms .................................................................................. 3-17
Selecting an Operating Mode ................................................................................................. 3-20
Triggered Mode .................................................................................................................. 3-20
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Gated Mode ........................................................................................................................ 3-21
Burst Mode ......................................................................................................................... 3-22
Selecting the Trigger Source .................................................................................................. 3-23
Using the Internal Trigger Generator ................................................................................... 3-23
Selecting the Trigger Slope ................................................................................................. 3-24
Using the Trigger Delay ...................................................................................................... 3-24
Selecting the Trigger Level ................................................................................................. 3-25
Using the Soft Trigger ......................................................................................................... 3-25
Generating Arbitrary Waveforms ............................................................................................ 3-25
What Are Arbitrary Waveforms?.......................................................................................... 3-26
Arbitrary Memory Management ........................................................................................... 3-26
Memory Management Commands ...................................................................................... 3-27
Loading Arbitrary Waveforms.............................................................................................. 3-28
High Speed Segment Downloads ....................................................................................... 3-31
Reversing Byte Order ......................................................................................................... 3-33
Selecting Binary Download Forma ...................................................................................... 3-34
Using Shared Memory ........................................................................................................ 3-34
16-Bit Shared ...................................................................................................................... 3-36
Memory Download .............................................................................................................. 3-36
Sequences ............................................................................................................................. 3-39
Generating Sequenced Waveforms ........................................................................................ 3-39
What Are Sequenced Waveforms? ..................................................................................... 3-39
High Speed Sequence Downloads...................................................................................... 3-42
Triggered Sequence Advance ............................................................................................. 3-44
Triggered Sequence Advance Commands.......................................................................... 3-45
Backplane Inter-Module Synchronization ............................................................................ 3-45
Front-Panel Phase Synchronization ....................................................................................... 3-47
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PLL Commands...................................................................................................................... 3-48
Using the Frequency Counter ................................................................................................. 3-49
Using the Phase Modulation Input .......................................................................................... 3-49
Amplitude Modulation Commands .......................................................................................... 3-50
Using Sweep Mode ................................................................................................................ 3-51
System-Related Commands ................................................................................................... 3-53
Chapter 4 .......................................................................................................................... 4-1
SCPI AND HS COMMAND REFERENCE .................................................................................. 4-1
What’s In This Chapter ............................................................................................................. 4-1
Introduction to the SCPI Language ........................................................................................... 4-1
Command Format .................................................................................................................... 4-2
Command Separator ................................................................................................................ 4-3
The MIN and MAX Parameters ............................................................................................. 4-3
Querying Parameter Setting ..................................................................................................... 4-4
Query Response Format ....................................................................................................... 4-4
SCPI Command Terminator ..................................................................................................... 4-4
IEEE-STD-488.2 Common Commands .................................................................................... 4-4
SCPI Parameter Types ............................................................................................................. 4-4
Numeric Parameters ............................................................................................................. 4-5
Discrete Parameters ............................................................................................................. 4-5
Boolean Parameters ............................................................................................................. 4-5
Arbitrary Block Parameters ................................................................................................... 4-5
Alternative Command Set (HS Commands) ............................................................................. 4-6
Invoking HS Command Mode ............................................................................................... 4-6
Rules for Using HS Command Mode .................................................................................... 4-7
SCPI and HS Command Summary........................................................................................... 4-8
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Output Configuration Command Summary ............................................................................. 4-14
Standard Waveform Command Summary .............................................................................. 4-16
Arbitrary Waveform, Sequence, and Shared Memory Command Summary ........................... 4-17
Modulation Command Summary ............................................................................................ 4-18
Trigger Command Summary .................................................................................................. 4-19
Backplane Inter-Module Phase Synchronization Command Summary ................................... 4-19
Front-Panel PLL Command Summary .................................................................................... 4-20
System-Related Command Summary .................................................................................... 4-21
IEEE-STD-488.2 Common Commands and Queries .............................................................. 4-21
The SCPI Status Registers ..................................................................................................... 4-23
The Status Byte Register (STB) ............................................................................................... 4-3
Reading the Status Byte Register ......................................................................................... 4-3
Clearing the Status Byte Register ......................................................................................... 4-4
Service Request Enable Register (SRE) ............................................................................... 4-4
Standard Event Status Register (ESR) ................................................................................. 4-5
Standard Event Status Enable Register (ESE)...................................................................... 4-6
Error Messages ........................................................................................................................ 4-6
Device-Specific Commands...................................................................................................... 4-8
Chapter 5 .......................................................................................................................... 5-1
MAINTENANCE AND PERFORMANCE CHECKS ..................................................................... 5-1
Maintenance Overview ............................................................................................................. 5-1
Disassembly Instructions .......................................................................................................... 5-1
Special Handling of Static Sensitive Devices ............................................................................ 5-2
Cleaning ................................................................................................................................... 5-2
Repair and Replacement .......................................................................................................... 5-3
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Performance Checks ................................................................................................................ 5-3
Environmental Conditions ..................................................................................................... 5-3
Warm-Up Period ................................................................................................................... 5-4
Initial Instrument Setting ....................................................................................................... 5-4
Recommended Test Equipment ............................................................................................ 5-4
Performance Check Procedures ............................................................................................... 5-5
Frequency Accuracy ............................................................................................................. 5-5
Amplitude Accuracy .............................................................................................................. 5-6
DC Offset Characteristics...................................................................................................... 5-6
Squarewave Characteristics ................................................................................................. 5-8
Sine Characteristics .............................................................................................................. 5-8
Sine Flatness ...................................................................................................................... 5-10
Trig, Gate and Burst Characteristics ................................................................................... 5-11
PLL Characteristics ............................................................................................................. 5-13
Adjustments............................................................................................................................ 5-15
Environmental Conditions ................................................................................................... 5-15
Warm-Up Period ................................................................................................................. 5-15
Recommended Test Equipment .......................................................................................... 5-15
Adjustment Procedures....................................................................................................... 5-15
Pulse Response Adjustment................................................................................................... 5-16
Amplitude Adjustment............................................................................................................. 5-17
Offset Adjustment ................................................................................................................... 5-17
VCO Adjustment..................................................................................................................... 5-18
PLL Adjustment ...................................................................................................................... 5-18
Troubleshooting ...................................................................................................................... 5-19
Recommended Test Equipment .......................................................................................... 5-20
Power-Up Tests .................................................................................................................. 5-20
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Self-Test ............................................................................................................................. 5-20
Main Board Circuit Checkout .............................................................................................. 5-20
Power Supply Checkout ...................................................................................................... 5-21
CPU and VXI ASIC Checkout ............................................................................................. 5-21
Output Amplifier and Amplitude Control Checkout .............................................................. 5-22
Clock Synthesizer Checkout ............................................................................................... 5-23
Sequence Generator Checkout ........................................................................................... 5-24
PLL Checkout ..................................................................................................................... 5-26
Engine Board Circuit Checkout ........................................................................................... 5-27
Engine Board Checkout ...................................................................................................... 5-27
Appendix A ......................................................................................................................A-1
3152A Specifications ..................................................................................................................A-1
VXIbus General Information .....................................................................................................A-1
Synthesizer Reference Sources/Sample Clock......................................................................... A-2
Triggering Characteristics .........................................................................................................A-2
Backplane Multi-Module Synchronization .................................................................................A-5
Output Characteristics ..............................................................................................................A-8
Standard Waveforms ................................................................................................................A-9
Arbitrary Waveforms ............................................................................................................... A-11
Sequenced Waveforms .......................................................................................................... A-12
Swept Waveforms ..................................................................................................................A-12
PLL Characteristics ................................................................................................................A-13
PM Characteristics .................................................................................................................A-16
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Appendix B ......................................................................................................................B-1
Tektronix VX4750 Emulation.......................................................................................................B-1
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List of Figures
Figure 1-1, 3152A ........................................................................................................................ 1-1
Figure 1-2, 3152A Front Panel ..................................................................................................... 1-6
Figure 1-3, Segment 1 - Sin(x)/x Waveform ............................................................................... 1-10
Figure 1-4, Segment 2 - Sine Waveform .................................................................................... 1-10
Figure 1-5, Segment 3 - Pulse Waveform .................................................................................. 1-10
Figure 1-6, Sequenced Waveforms ............................................................................................ 1-11
Figure 2-1, Set The Logical Address ............................................................................................ 2-5
Figure 2-2, 3152 Emulation Mode and Address Space Switch ..................................................... 2-6
Figure 3-1, Definite Length Arbitrary Block Data Format ............................................................ 3-29
Figure 3-2, 12-Bit Waveform Data Format.................................................................................. 3-29
Figure 3-3, 16-Bit Waveform Data Format.................................................................................. 3-30
Figure 3-4, High Speed Segment Downloads ............................................................................ 3-32
Figure 3-5, Sin(x)/x Waveform Loaded Into Segment 1 .............................................................. 3-39
Figure 3-6, Sine Waveform Loaded Into Segment 2 ................................................................... 3-40
Figure 3-7, Pulse Waveform Loaded Into Segment 3 ................................................................. 3-40
Figure 3-8, Sequenced Waveforms - Continuous Advance Mode .............................................. 3-40
Figure 3-9, Sequenced Downloads ............................................................................................ 3-43
Figure 3-10, Sequenced Waveforms - Triggered Advance Mode ............................................... 3-45
Figure 4-1, SCPI Status Registers ............................................................................................... 4-2
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List of Tables
Table 3-1, Default Conditions After Power On, RESet or *RST .................................................... 3-2
Table 3-2, Peak to Peak Amplitude and Offset Ranges................................................................ 3-3
Table 4-1, VXIbus 3152A SCPI Command Summary................................................................... 4-9
Table 5-1, CPU and VXI Interface Checkout Procedure ............................................................. 5-22
Table 5-2, Output Amplifier and Amplitude Control Checkout Procedure ................................... 5-23
Table 5-3, Clock Synthesizer Checkout Procedure .................................................................... 5-24
Table 5-4, Sequence Generator Checkout Procedure ................................................................ 5-25
Table 5-5, Burst Generator Checks ............................................................................................ 5-26
Table 5-6, PLL Checkout Procedure .......................................................................................... 5-26
Table 5-7a, Engine Board Checkout Procedure - #1 .................................................................. 5-28
Table 5-7b, Engine Board Checkout Procedure - #2 .................................................................. 5-29
Table 5-7c, Engine Board Checkout Procedure - #3 .................................................................. 5-29
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Document Change History
Revision
A
xiv
Date
3-25-09
Description of Change
Revised per EO 29595
Correct specification error (pg 5-14) and
option part numbers (pg 1-3). Revise format
to current standards.
Astronics Test Systems
Publication No. 980867 Rev. A
3152A User Manual
Chapter 1
GETTING STARTED
What’s In This
Chapter
This chapter contains a general description of the VXIbus 3152A
Waveform Synthesizer and an overall functional description of
the instrument. It lists and describes various options available
for this model.
It also describes the 3152A front panel
connectors and indicators.
NOTE:
This manual provides a complete description of all features
and options available with the 3152A; however, some items
described in the following paragraphs may not be installed
in your instrument.
Figure 1-1, 3152A
Astronics Test Systems
Getting Started 1-1
3152A User Manual
Introduction
Publication No. 980867 Rev. A
The 3152A is a VXIbus, single slot C-size Synthesized
Waveform Generator. It is a high performance waveform
synthesizer that combines two powerful instruments in one small
package; a function generator and an arbitrary waveform
generator. The instrument provides a variety of standard
waveforms to be used as test stimuli for different electronic
devices. The 3152A is also capable of generating arbitrary
waveforms with sampling rates to 100 MHz at 12 bits of vertical
resolution.
Despite its small size, the 3152A offer many features and
functions such as VXIplug&play compatibility, backplane phase
synchronization, front-panel PLL, sweep, counted burst, internal
trigger-generator, and more. The instrument generates high
quality, high accuracy waveforms throughout the specified
frequency range, amplitude span, and operating temperature.
The 3152A generates sine waveforms with a spectral purity that
can only be matched by much more expensive bench type
synthesizers.
The 3152A generates standard waveforms at frequencies
ranging from 100 µHz to 50 MHz. Frequency may be set with 7
digit resolution. Accuracy and stability of the output frequency
depend on the reference clock. As a default, CLK10 is used as
the reference clock. The typical accuracy and stability of CLK10
is 100 ppm. An optional internal TCXO circuit provides 1 ppm
accuracy and stability. When the optional TCXO is installed, the
output frequency can be programmed with a full seven digits of
resolution.
Arbitrary waveforms are generated with clock rates ranging from
100 mHz to 100 MHz. Output amplitude may be programmed
within the range of 20 mV to 32 Vp-p into an open circuit, and 10
mV to 16V into 50Ω. Amplitude and offsets are programmed
with 4 digit resolution.
Besides normal continuous mode, the 3152A offers a variety of
interrupted modes.
The output waveform may be gated,
triggered, or may generate a counted burst of waveforms. A
built-in trigger generator with a programmable period can replace
an external trigger.
The 3152A generates arbitrary waveforms with 12 bits of
resolution.
There are nine standard waveforms that are
memory-resident. Other waveforms may be generated, either
manually or downloaded from the controller to the instrument
using shared memory or standard data bus transfer. Waveforms
may also be generated using the WaveCAD program.
Getting Started 1-2
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Publication No. 980867 Rev. A
3152A User Manual
The 3152A waveform synthesizer is a digital instrument.
Besides standard waveforms, any waveform generated must first
be loaded into the arbitrary waveform memory. The arbitrary
waveform memory is a bank of 8-bit words. Each word
represents a point on the waveform. Each word has a horizontal
address that can range from 0 to 523288) and a vertical address
that can range from -2048 to +2047 (12 bits). Using a high
speed clocking circuit, the digital contents of the arbitrary
waveform memory are extracted and routed to the D/A
converter. The D/A converts the digital data to an analog signal,
and the output amplifier completes the task by amplifying or
attenuating the signal at the output connector.
The 3152A is fully programmable using SCPI commands and
syntax. There are two ways to program the 3152A, the first
being low level programming of each individual parameter. The
second alternative is to use the VXIplug&play soft front panel for
high level programming. The VXIplug&play soft front panel
simulates a mechanical front panel with the necessary push
buttons, displays and dials to operate the 3152A as a bench-top
instrument.
The 3152A will not operate without being
programmed. Therefore, it is recommended that the user
become familiar with its basic features, functions and
programming concepts as described in this and the following
chapters.
Options
A number of options are offered with the 3152A. Compare the
option number with the number that is printed on the instrument
to verify which of the options is installed in your instrument. Note
that all 3152A options are installed in the factory. Contact your
Astronics Test Systems sales representative if the number
printed on the case does not reflect the correct version ordered.
The list of available 3152A options is given below:
407808-001 - 3152A - 100MS/s Waveform Synthesizer,
w/64K RAM
407808-003 - 3152A - 100MS/s Waveform Synthesizer,
w/512K RAM
407808-011 - 3152A - 100MS/s Waveform Synthesizer,
w/64K RAM, 1ppm
407808-013 - 3152A - 100MS/s Waveform Synthesizer,
w/512K RAM, 1ppm
407808-203 - 3152A - 100MS/s Waveform Synthesizer,
w/512K RAM, Tektronix VX4750 Emulation
407808-213 - 3152A - 100MS/s Waveform Synthesizer,
w/512K RAM, 1ppm, Tektronix VX4750 Emulation
The 512K RAM option designates the memory size supplied with
the 3152A. The standard memory size is 512K (524288 words).
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Getting Started 1-3
3152A User Manual
Publication No. 980867 Rev. A
With the standard memory size, 523288 point waveforms can be
programmed because 1000 words are allocated for standard
waveforms.
The 64K RAM option designates instruments supplied with 64K
of memory expansion. With the 64K option, 64536 point
waveforms can be programmed.
1ppm denotes improved accuracy and stability over the internal
10 MHz reference clock. Normally, VXIbus modules receive
their clock reference from VXIbus CLK10.
There are
applications that require complete separation from VXIbus
clocks. The TCXO (1ppm) option, when installed, provides the
required separation.
Safety
Considerations
The 3152A has been manufactured according to international
safety standards.
WARNING:
Do not remove instrument covers when operating or when
the chassis power cord is connected to the mains.
Any adjustment, maintenance and repair of an opened,
powered-on instrument should be avoided as much as possible,
but when necessary, should be carried out only by a skilled
person who is aware of the hazard involved.
Supplied
Accessories
The 3152A is supplied with an Instruction Manual. The manual
includes disks with VXIplug&play soft front panel and drivers
along with WaveCAD for Windows.
Specifications
Instrument specifications are listed in Appendix A. These
specifications are the performance standards or limits against
which the instrument is tested. Specifications apply under the
following conditions: output terminated into 50Ω after 30 minutes
of warm up time, and within a temperature range of 20oC to
30oC. Specifications outside this range are degraded by 0.1%
per oC.
Getting Started 1-4
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Publication No. 980867 Rev. A
3152A User Manual
Functional
Description
A detailed functional description is given in the following
paragraphs. The description is divided into logical groups: input
and output connectors, operating modes, output type, output
state, synchronization, filters and front panel indicators.
Input and Output
Connectors
The 3152A has 5 BNC connectors on its front panel: main
output, SYNC output, phase modulation input, external clock
input and the trigger/PLL input. The 3152A Front Panel is shown
in Figure 1-2.
Main Output
The main output connector outputs standard, user, and
sequenced waveforms. Output impedance of this output is 50Ω,
that is, the cable which is connected to this input should be
terminated with a 50Ω resistance. Output amplitude accuracy is
calibrated when connected to a 50Ω load. If the output is
connected to a different load resistance, determine the actual
amplitude from the resistance ratio of the internal 50Ω to the
load impedance. The output amplitude is doubled when the
output impedance is above 1MΩ.
SYNC Output
The SYNC Output generates a single TTL pulse for
synchronizing other instruments (i.e., an oscilloscope) to the
output waveform. The SYNC signal always appears at a fixed
point relative to the waveform. The SYNC output generates a
single point pulse for standard and arbitrary waveforms. The
location of the SYNC signal along the waveform is
programmable from point 2 to the last point on the waveform.
External Clock
Input
The External Clock Input is available for those applications
required to run the complete system off the same clock.
Normally, this input is disabled. When enabled under program
control the clock at this input replaces the internal clock
generator and the output waveform will begin generating
waveforms with clock rates that are present at the external clock
input. Do not confuse the clock frequency with the frequency of
the waveform. The actual frequency of the output waveform
depends on the number of points that are allocated for the
waveform. For example, if the external clock is 10 MHz and the
number of points that were assigned to the active segment is
1000, the output frequency will be 10 KHz (10 MHz divided by
the number of points). The external clock input accepts fixed
level ECL signals within the range of DC to 100 MHz.
Astronics Test Systems
Getting Started 1-5
3152A User Manual
Publication No. 980867 Rev. A
Figure 1-2, 3152A Front Panel
Getting Started 1-6
Astronics Test Systems
Publication No. 980867 Rev. A
PM Input
Trigger Input
3152A User Manual
The PM Input accepts signals that phase modulate the main
output frequency. The phase modulation function operates in
conjunction with the PLL function. The PM input is active at all
times. Therefore, unless you intend to use this function, do not
connect any cables to this input during normal operation of the
3152A.
The Trigger Input accepts signals that stimulate the 3152A to
output waveforms. The trigger input is inactive when the
instrument is in continuous operating mode. When placed in
trigger, gated or burst mode, the trigger input is made active and
waits for the right condition to trigger the instrument. In trigger
and burst modes, the trigger input is edge sensitive, i.e., it
senses transitions from high to low or from low to high to trigger
the 3152A. The direction of the transition is programmable. In
PLL mode, the trigger input is used as phase reference input.
In gated mode, the trigger input is level sensitive, i.e., the 3152A
output is enabled when the level is high and idle when the level
is low. Level sensitivity may be programmed for the trigger
input.
Operating Modes
There are a number of operating modes that the 3152A can be
programmed to operate in: continuous mode, triggered mode,
gated mode and burst mode. These operating modes are
described below.
Continuous Mode
In continuous mode, the selected waveform is output
continuously at the selected frequency, amplitude and offset.
Triggered Mode
In triggered mode, the 3152A circuits are armed to generate one
output waveform. The trigger circuit is sensitive to transitions at
the trigger input. Select between positive or negative transitions
to trigger the instrument. You may also program the trigger level
to the desired threshold level on the external signal. When
triggered, the synthesizer outputs the waveform and remains idle
at the last point of the waveform. The 3152A can be armed to
receive a trigger signal from the front panel BNC connector, a
VXIbus backplane TTLTRG<n> or from an internal,
programmable trigger generator.
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Getting Started 1-7
3152A User Manual
Publication No. 980867 Rev. A
The trigger signal, whether it comes from the front panel or from
the VXIbus, has to pass through circuitry. These circuits cause a
small delay known as system delay. System delay cannot be
eliminated completely. It is, however, minimized in the 3152A to
approximately 200ns maximum. System delay is a factor that
must be considered when applying a trigger signal. It defines
how long it will take from a valid trigger edge to the moment that
the output reacts.
While system delay cannot be controlled, the 3152A offers a
controllable trigger delay parameter. When utilized, delay from a
trigger signal to output waveform may be programmed from 0
clocks to one million clocks. This delay is additional to the
system delay.
Burst Mode
The burst mode is an extension of the triggered mode where the
3152A can be armed to output a counted number of waveforms
following a triggered signal. Like trigger mode, burst can be
triggered from a front panel BNC connector, a VXIbus backplane
TTLTRG<n> or from an internal, programmable trigger
generator.
Gated Mode
In gated mode, the 3152A circuits are armed to generate output
waveforms as long as a gating signal is true. Unlike the
triggered mode, the gated mode is level sensitive. When the
gating signal goes false, the waveform at the output connector is
first completed and the output goes to an idle state. The stop
amplitude level, after a gating signal, is the last point on the
waveform.
Output Type
The 3152A can output three types of waveforms: standard
waveforms, arbitrary waveforms and sequenced waveforms.
The three types of waveforms are described in the following.
Getting Started 1-8
Astronics Test Systems
Publication No. 980867 Rev. A
Standard
Waveforms
3152A User Manual
The 3152A generates waveforms from a memory that has to be
loaded before the waveforms can be can generated. There are
512K points of memory standard. A smaller memory, 64K
version is also available as an option. 1000 points from this
memory are allocated for standard waveforms. Waveforms are
loaded into this part of the memory each time a standard
function is selected.
The 3152A can be programmed to output nine different standard
waveforms: sine wave, triangular wave, square wave, pulse,
ramp, sinc (sine(x)/x), gaussian pulse, exponential pulse and
DC. There are certain parameters that are associated with each
standard function. These parameters can be programmed to
generate modified standard waveforms.
Arbitrary Waveforms
The arbitrary waveform memory is capable of storing one or
more user waveforms.
There are 523288 points (64536
optional) that can be allocated to one waveform that has this
length. If there is no need to use the complete memory, it can
be divided into smaller segments, variable in size. Load each
segment with a different waveform and program the 3152A to
output the required waveform for a specific test. Loading data to
arbitrary waveform memory can be a time-consuming task,
especially if the complete 512K is loaded in one shot. The
3152A utilizes the VXIbus shared memory concept that speeds
data transfer from and to the host computer. In this mode, the
memory bank is disconnected from the CPU circuit and its bus is
accessible from the VXIbus for direct memory access by the host
computer.
Sequenced
Waveforms
The 3152A employs a sophisticated circuit that allows dividing
the memory into smaller segments, linking of the segments in
user-defined order, and repeating of each linked segment up to
one million times. The sequence circuit is useful for generating
long waveforms with repeated sections. The repeated waveform
has to be programmed once and the repeater will loop on this
segment as many times as selected. When in sequenced mode,
there is no loss of time between linked or looped segments.
Figure 1-6 shows an example of a sequenced waveform.
Assume the waveforms in Figures 1-3 through 1-5 were placed
in segments 1 through 3.
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Getting Started 1-9
3152A User Manual
Publication No. 980867 Rev. A
Figure 1-3, Segment 1 - Sin(x)/x Waveform
Figure 1-4, Segment 2 - Sine Waveform
Figure 1-5, Segment 3 - Pulse Waveform
The following sequence was made of segment 2 repeated
twice, segment 1 repeated four times and segment 3 repeated
twice.
Getting Started 1-10
Astronics Test Systems
Publication No. 980867 Rev. A
3152A User Manual
Figure 1-6, Sequenced Waveforms
Sweep Waveforms
The 3152A’s Sweep Mode is a special case of Sequenced Mode
which utilizes the sequencer and the 3152A’s 512k of waveform
memory to store a sequence of sine, square or triangle
waveforms. The sweep is user-programmable to have up to
2000 steps and as few as 10. Sweep steps are individual
waveforms stored in segments. Sweep advance spacing is
specified as either linear or logarithmic and either up or down in
frequency. Sweep may be either continuous or triggered.
Output State
The main output can be turned on or off. The internal circuit is
disconnected from the output BNC connector by a mechanical
switch under program control (relay). This feature is useful for
connecting the 3152A main output, along with other instruments,
to an analog bus. For safety reasons, after power on, the main
output is always off.
Backplane
Synchronization
Multiple 3152As may be synchronized and operated together
inside one VXIbus chassis. With one instrument configured as
master and the rest of the instruments configured as slaves, the
instruments are phase-locked to the start phase on the master
module. The slave modules may be configured to have phase
offsets within the range of 0 to 360. There is no need to install
multiple 3152A modules in adjacent slots to be able to phase
synchronize modules.
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Publication No. 980867 Rev. A
Front-Panel PLL
The 3152A may be phase locked to an external reference and
phase shifted from the start phase of the external reference from
-180 to +180. The reference signal is applied to a front-panel
input BNC. In this way, the same reference can be applied to
multiple modules to generate multi-phase signal patterns. The
reference signal for the PLL function is applied to the TRIG IN. It
shares the same characteristics as the trigger input,
programmable trigger level and programmable slope. When
placed in this mode, the 3152A scans the TRIG IN connector for
a valid signal. Once sensed, the 3152A measures its frequency
and centers its lock-in range around this frequency. The 3152A
then locks automatically on the frequency of the external signal.
There is no need for manual initiation or operator intervention for
locking the 3152A to an external reference. The PLL range is
500 Hz to 10 MHz.
Frequency
Counter
The 3152A uses an autoranging counter circuit to measure
frequencies of reference signals at the trigger input. This built-in
counter is made available for you in PLL mode. Thus, you can
use the 3152A as a frequency counter provided that the signal at
the trigger input is valid and the PLL ON LED illuminates.
Frequencies are measured from 500 Hz to 10 MHz. External
frequency query returns four digits with a decimal point and
suffix multiplier.
Phase Modulation
When the 3152A is placed in PLL mode, there are two ways to
control the phase offset. The first option is to modify the phase
offset setting using SCPI commands. This method is extremely
accurate while permitting phase offset adjustments with 0.01
increments. The PM IN provides another option for changing
phase offsets. Applying voltage to this input changes the start
phase of the synthesizer continuously, depending on the voltage
level at the phase modulation input. The applied voltage range
is DC to 10 kHz, depending on the lock frequency and the
number of waveform samples.
Filter
Three filters are built into the 3152A, each having a different
cutoff frequency and rise time properties. These filters are
available for use in various applications, depending on the
specific requirement. The 20 MHz Gaussian filter has a
gaussian response which smooths fast transitions and eliminates
ringing and aberrations. The 25 MHz and the 50 MHz filters are
elliptical with a very sharp cutoff frequency. They are useful for
removing the staircase effect from waveforms that are generated
with high frequency clock rates.
Getting Started 1-12
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Publication No. 980867 Rev. A
Front Panel
Indicators
3152A User Manual
There are three LEDs on the front panel. The FAIL LED (Red)
illuminates at power-up until the 3152A has passed its self-test.
If the 3152A self-test fails, the FAIL LED remains illuminated.
The FAIL LED may be illuminated during normal operation if the
3152A stops communication.
The ACCESS LED (Amber) illuminates each time a command
has been received by the 3152A. This light remains on during
shared memory data transfer.
The PLL ON LED is off during normal operation. In PLL mode,
the PLL ON illuminates when a valid signal is available at the
trigger input and lock frequency is available at the main output
connector.
When the output state is on, the OUTPUT LED (Green) light
illuminates. It goes off when the output state is changed to off.
Programming the
3152A
The 3152A has no controls on the front panel. Instrument
functions, parameters, and modes can only be accessed through
VXIbus commands. There are a number of ways to “talk” to the
instrument. They all require that an appropriate software driver
be installed in the Resource Manager (slot 0). The rest is a
matter of practice and knowledge of the language in use. There
are other system considerations like address selection that have
to be settled before programming the instrument. These topics
are discussed in later chapters.
Low level programming of the 3152A is done using SCPI
(Standard Commands for Programmable Instruments) language
or using binary commands for high speed. Programming
aspects are covered in Chapters 3 and 4.
Please check the Astronics Test Systems web site:
http://www.astronicstestsystems.com/support/downloads
to download the latest versions of the 3152A VXIplug&play
install disk, LabVIEW driver and WaveCAD.
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Getting Started 1-13
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Getting Started 1-14
Astronics Test Systems
Publication No. 980867 Rev. A
3152A User Manual
Chapter 2
CONFIGURING THE INSTRUMENT
Installation
Overview
This chapter contains information and instructions necessary to
prepare the 3152A for operation. Details are provided for initial
inspection,
grounding
safety
requirements,
repacking
instructions for storage or shipment, logical address selection
and installation information.
Unpacking and
Initial Inspection
1. Remove the 3152A module and inspect it for damage. If any
damage is apparent, inform the carrier immediately. Retain
shipping carton and packing material for the carrier’s
inspection.
2. Verify that the pieces in the package you received contain
the correct 3152A module option and the 3152A Users
Manual. Notify Customer Support if the module appears
damaged in any way. Do not attempt to install a damaged
module into a VXI chassis.
3. The 3152A module is shipped in an anti-static bag to prevent
electrostatic damage to the module. Do not remove the
module from the anti-static bag unless it is in a staticcontrolled area.
Safety
Precautions
The following safety precautions should be observed before
using this product and associated computer. Although some
instruments and accessories would normally be used with nonhazardous voltages, there are situations where hazardous
conditions may be present.
This product is intended for use by qualified personnel who
recognize shock hazards and are familiar with the safety
precautions required to avoid possible injury.
Read the
operating information carefully before using the product.
Exercise extreme caution when a shock hazard is present.
Lethal voltage may be present on cables, connector jacks, or
test fixtures. The American National Standard Institute (ANSI)
states that a shock hazard exists when voltage levels greater
than 30V RMS, 42.4V peak or 60 VDC are present.
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Configuring the Instrument 2-1
3152A User Manual
Publication No. 980867 Rev. A
WARNING:
For maximum safety, do not touch the product, test cables,
or any other instrument parts while power is applied to the
circuit under test. ALWAYS remove power from the entire
test system before connecting cables or jumpers, installing
or removing cards from the computer, or making internal
changes such as changing the module address.
WARNING:
Do not touch any object that could provide a current path to
the common side of the circuit under test or power line
(earth) ground. Always keep your hands dry while handling
the instrument.
When using test fixtures, keep the lid closed while power is
applied to the device under test. Safe operation requires that
the computer lid be closed at all times during operation.
Carefully read the “Safety Precautions” instructions that are
supplied with your computer. Before performing any
maintenance, disconnect the line cord and all test cables.
Maintenance
personnel.
should
be
performed
by
qualified
service
Performance
Checks
The instrument has been inspected for mechanical and electrical
performance before shipment from the factory. It is free of
physical defects and in perfect electrical order. Check the
instrument for damage in transit and perform the electrical
procedures outlined in the section entitled Unpacking and
Initial Inspection.
Grounding
Requirements
To insure the safety of operating personnel, the U.S. O.S.H.A.
(Occupational Safety and Health) requirement and good
engineering practice mandate that the instrument panel and
enclosure be "earth" grounded. Although BNC housings are
isolated from the front panel, the metal part is connected to earth
ground.
Configuring the Instrument 2-2
Astronics Test Systems
Publication No. 980867 Rev. A
3152A User Manual
WARNING:
Do not make an attempt to float the output from ground as it
may damage the 3152A and your equipment.
Long Term
Storage or
Repackaging For
Shipment
If the instrument is to be stored for a long period of time or
shipped immediately, proceed as directed below. If you have any
questions, contact the Customer Service department.
Repack the instrument using the wrappings, packing material
and accessories originally shipped with the unit. If the original
container is not available, purchase replacement materials.
Be sure the carton is well-sealed with strong tape or metal
straps.
Mark the carton with the model and serial number. If it is to be
shipped, show sending and return address on two sides of the
box.
NOTE:
If the instrument is to be shipped to Astronics Test Systems
for calibration or repair, attach a tag to the instrument
identifying the owner. Note the problem, symptoms, and
service or repair desired. Record the model and serial
number of the instrument. Show the work authorization
order as well as the date and method of shipment. ALWAYS
OBTAIN A RETURN AUTHORIZATION NUMBER FROM
CUSTOMER
SERVICE
BEFORE
SHIPPING
THE
INSTRUMENT TO ASTRONICS TEST SYSTEMS.
Preparation For
Use
Preparation for use includes removing the 3152A from the
container box, selecting the required logical address and
installing the module in a VXIbus chassis.
Astronics Test Systems
Configuring the Instrument 2-3
3152A User Manual
Logical Address
Selection
Publication No. 980867 Rev. A
The VXIbus Chassis Resource Manager identifies modules in
the system by the module’s address. VXIbus logical addresses
can range from 0 to 255, however, only addresses 1 to 254 are
available for VXIbus modules. Logical address 0 is reserved for
the Resource Manager. Logical address 255 permits the
Resource Manager to dynamically configure the module logical
address.
To change the 3152A’s logical address, use the 8-position DIP
switch accessible from the top side of the module near the rear
end of the case (switch S1). Figure 2-1 shows the location of
the logical address switch. The switches are marked with
numbers 1 to 8. The 3152A uses binary values (20 to 27) to set
the logical address using the active low address switch. A switch
is active when its arm is placed in the ON position.
Astronics Test Systems ships the 3152A with logical address 2.
Emulation Mode
Selection
The 3152A Synthesizer has numerous enhancements over the
older 3152 and 3152-S-1619. For those customers wishing to
use the 3152A as a direct replacement for the 3152 or 3152-S1619, the 3152A has an emulation mode capability. In this mode
of operation, the 3152A will identify itself as a 3152 or 3152-S1619 and act exactly like the selected model.
NOTE:
When using the 3152A in 3152 emulation mode, the 3152
Software Driver must be used. This driver is available on
the Astronics Test Systems website. See the front of this
manual for link to the Support Download page.
The module is shipped from the factory in 3152A Mode. To put
the module in 3152 or 3152-S-1619 emulation mode, simply flip
the appropriate position of the Instrument ID switch. This switch
is accessed through the left side panel of the module. Setting
the switch to the ON position entails moving the switch towards
the front panel. This is shown in Figure 2-2.
Address Space
Selection
Configuring the Instrument 2-4
The 3152A Synthesizer may operate in either A24 or A32
Address Space modes. The module is shipped from the factory
in A24 mode. To set the module to A32 mode set the switch to
the ON position by moving the switch towards the front panel.
This is shown in Figure 2-2.
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Publication No. 980867 Rev. A
3152A User Manual
1
0
LOGICAL ADDRESS SELECT
OFF
(LOGIC 0)
MSB
ON
(LOGIC 1)
LSB
S1
SIDE VIEW
OF SWITCH S1
Figure 2-1, Set the Logical Address
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Configuring the Instrument 2-5
3152A User Manual
Publication No. 980867 Rev. A
The instrument can be installed in any slot except slot 0 in a
VXIbus mainframe. When inserting the instrument into the
mainframe, it should be gently rocked back and forth to seat the
connectors into the backplane receptacle. The ejectors will be
at right angles to the front panel when the instrument is properly
seated into the backplane. Use two captive screws above and
below the ejectors to secure the instrument into the chassis.
Installation
After installation, perform an initial checkout and operational
verification.
A32
A24
A32
7
8
A24
Keep Low
3152-S-1619
Standard
Unused
Standard
3152A
DO NOT SET HIGH
4
0 (OFF)
Unused
3152-S-1735
3
3152
3152-S-1619
2
1 (ON)
3152A
3152
1
3152A
Front Panel
Shown in 3152
Emulation Mode
Figure 2-2, 3152 Emulation Mode and Address Space Switch
Configuring the Instrument 2-6
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Publication No. 980867 Rev. A
3152A User Manual
Chapter 3
USING THE INSTRUMENT
Overview
This chapter contains information about how to operate the
3152A. Unlike bench-type instruments, the 3152A must be
programmed to turn on functions, change parameters and
configure various operating modes. The instrument can be
programmed using a set of SCPI commands. A list of SCPI
commands (and the alternate HS command set) that control the
3152A is given in Table 4-1. The following paragraphs describe
the various modes of operation and give examples on how to
program the 3152A.
Output
Termination
During use, output connectors must be properly terminated to
minimize signal reflection or power loss due to an impedance
mismatch. Proper termination is also required for an accurate
amplitude level at the main output connector. Use 50Ω cables
and terminate the main and SYNC cables with terminating
resistors. Always place the 50Ω termination at the far end of the
cables.
Input/Output
Protection
The 3152A provides protection for internal circuitry connected to
input and output connectors. Refer to the specifications in
Appendix A to determine the level of protection associated with
each input or output connector.
Power On/Reset
Defaults
At Power On or as a result of a software reset, the 3152A
defaults to the conditions shown in Table 3-1. A complete list of
all parameters and their default values is given in Chapter 4.
Use the following command to place the instrument in its default
state:
RESet;
Using the IEEE-STD-488.2 common command *RST will have
the same result.
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Using The Instrument 3-1
3152A User Manual
Publication No. 980867 Rev. A
Table 3-1, Default Conditions After Power On, RESet or *RST
Output State:
Off
Operating Mode:
Continuous
Filter State:
Off
Filter Type:
20MHz
ECLTRG0-1:
Off
TTLTRG0-7:
Off
Output Trigger Source:
BIT
SYNC State:
Off
Std. Wave Frequency:
1 MHz
Arb. Wave Sample
Clock:
1 MHz
Amplitude:
5V
Offset:
0V
Output Mode:
FIXed (Std.)
Standard Waveform:
Sine
Advance Mode:
Auto
SYNC Out Position:
Point n-6
SYNC Slate:
Off
Inter-module Phase
Synchronization State:
Off
Trigger Slope:
Positive
Internal Trigger Period:
100s
Shared Memory State:
Off
Shared Memory Mode:
Read
What To Do Now
When writing low level code to operate the 3152A, follow the
instructions in this chapter to understand the meaning and
response that each command generates. Examples contained
in the following paragraphs show basic techniques on how to
program output waveforms.
Example 1
The following example programs the 3152A to turn on the main
output, generate a square waveform, program the frequency to
2 MHz, program the amplitude to 5 V and offset to 2.5 V.
/* Reset the Model 3152A to its default condition as listed in
Table 3-1.*/
:RESet;
/* Change the output waveform to square. Note that there is no
need to use the FUNC:MODE command as the default value
after RESet is FIXed.*/
:FUNCtion:SHAPe SQUare;
/* Change the frequency to 2 MHz.*/
:FREQuency 2e6;
/*Change the amplitude to 5 V and the offset to 2.5 V.*/
:VOLTage 5;
:VOLTage: OFFSet 2.5;
There are three offset windows (±8 V, ±800 mV, ±80 mV); the
Using The Instrument 3-2
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Publication No. 980867 Rev. A
3152A User Manual
window selected is a function of the amplitude setting. Table 32 shows the maximum offset available within each window.
Table 3-2, Peak to Peak Amplitude and Offset Ranges
Attenuator Range
Amplitude Range
Window
Maximum Offset
1
A > 1.6 V
±8 V
0 to ±7.19 V
2
160 mV < A ≤ 1.6 V
±800 mV
0 to 719 mV
3
10 mV ≤ A ≤ 160 mV
±80 mV
0 to 75 mV
To calculate the maximum offset available for a particular
amplitude setting, use the following inequality:
Vamplitude
+ | Voffset | ≤ 8V | 800mV | 80mV
2
In FIXed (Std.) Waveform mode, amplitude and offset limitations
may be exceeded at a cost of dynamic range of the output AC
signal.
For example, a FIXed mode sine wave with a 800mV peak to
peak amplitude will force the 3152A into attenuator range 2 as
long as the offset voltage setting does not exceed the maximum
calculated by the equation above (400mV). But, if a 2V offset is
needed, the 3152A will be forced into attenuator range 1
because 1.6V will be exceeded. Since the smallest full-scale
signal cannot be less than 1.6V peak to peak in this range, the
3152A’s main DAC must generate the waveform at 50% of full
scale. This reduces the resolution to 11 bits, reducing the
3152A’s dynamic range by 6dB.
/* Turn the main output on.*/
:OUTPut ON;
/*Turn the SYNC output on, if required.*/
:OUTPut:SYNC ON;
If the above commands are executed correctly, a square
waveform will be seen on your oscilloscope.
Astronics Test Systems
Using The Instrument 3-3
3152A User Manual
Using the APPLy
Command
Publication No. 980867 Rev. A
The APPLy command provides a high level method of
programming the synthesizer. Selection can be made for
function, frequency, amplitude, offset and other parameters
which are associated with the selected function. For example,
the following statement outputs a 2 Vp-p square wave at 1 MHz
with a 0 V offset and 10% duty cycle using APPLy:
APPL:SQU 1E6, 2, 0, 10
It is not necessary to enter every parameter with the APPLy
command. If only the frequency and offset need to be changed,
omit the other parameters while keeping the commas. The other
parameters will be set to the power-up default values:
APPL:SQU 10E6,,1
Alternatively, if just the first parameters need to be changed,
omit the commas. The other parameters will be set to the
power-up default values:
APPL: SQU 4e6,2
Queries can also be made on all parameters associated with a
standard function using the APPL: <function_shape>? query. For
example, if the synthesizer was programmed using the above
APPLy:SQU command, query the square wave parameters
using the following query:
APPL:SQU?
Using The Instrument 3-4
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Publication No. 980867 Rev. A
3152A User Manual
The synthesizer returns a string that contains all the parameters
associated with the square function similar to the following string:
“1.000000e+6,2.000,0.000,50"
The command:
APPLy: SINusoid {<frequency>,<amplitude>,<offset>,
<phase>,<power>}
programs the synthesizer to output a sine waveform with
frequency, amplitude, offset, start phase and power parameters.
Parameters are not optional if the above APPLy command is
used. Include all other parameters in the command. The default
settings for these functions are: 1 MHz, 5 Vp-p, 0 V, 0 and 1.
APPLy: TRIangle {<frequency>,<amplitude>,<offset>,
<phase>,<power>}
programs the synthesizer to output a triangle waveform with
frequency, amplitude, offset, start phase, and power parameters.
The default settings for these functions are: 1 MHz, 5 Vp-p, 0 V,
0 and 1.
The command:
APPLy: SQUare {<frequency>,<amplitude>,<offset>,
<duty_cycle>}
programs the synthesizer to output a square waveform with
frequency, amplitude, offset and duty cycle parameters. The
default settings for these functions are: 1 MHz, 5 Vp-p, 0 V, and
50%.
The command:
APPLy: PULSe{<frequency>,<amplitude>,<offset>,
<delay>,<high_time>,<rise_time>,<fall_time>}
programs the synthesizer to output a pulse waveform with
frequency, amplitude, offset, delay, rise time, high time and fall
time parameters. The default settings for these functions are: 1
MHz, 5 Vp-p, 0 V, 0%, 10%, 10% and 10%.
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Using The Instrument 3-5
3152A User Manual
Publication No. 980867 Rev. A
The command:
APPLy: RAMP {<frequency>,<amplitude>,<offset>,
<delay>, <rise_time>,<fall_time>}
programs the synthesizer to output a ramp waveform with
frequency, amplitude, offset, delay, rise time, and fall time
parameters. The default settings for these functions are: 1 MHz,
5 Vp-p, 0 V, 0%, 10% and 10%.
The command:
APPLy: SINC {<frequency>,<amplitude>,<offset>,
<number_cycles>}
programs the synthesizer to output a sine(x)/x waveform with
frequency, amplitude, offset, and number of cycles parameters.
The default settings for these functions are: 1 MHz, 5 Vp-p, 0 V
and 10.
The command:
APPLy: EXPonential <frequency>,<amplitude>,<offset>,
<exponent>}
programs the synthesizer to output an exponential waveform
with frequency, amplitude, offset, and exponent parameters.
The default settings for these functions are: 1 MHz, 5 Vp-p, 0 V
and -10.
The command:
APPLy: GAUSsian {<frequency>,<amplitude>,<offset>,
<exponent>}
programs the synthesizer to output a gaussian waveform with
frequency, amplitude, offset, and exponent parameters. The
default settings for these functions are: 1 MHz, 5 Vp-p, 0 V and
10.
The command:
APPLy: DC {<percent_amplitude>}
programs the synthesizer to output a DC level. The DC level is
set as a percent of programmed amplitude. The default setting
for this function is 100%.
Using The Instrument 3-6
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Publication No. 980867 Rev. A
3152A User Manual
The command:
APPLy: USER {<segment_number>,<sampling_clock>,
<amplitude>,<offset>}
programs the synthesizer to output an arbitrary waveform. The
specified segment number must be loaded with an arbitrary
waveform before the synthesizer can execute this command
successfully. This command lets you specify segment number,
sampling clock rate, amplitude and offset. The default settings
for these functions are: 1, 1 MHz, 5 Vp-p and 0 V.
The query:
APPLy:<function_shape>?
queries parameters associated with the specified function shape.
Returns a string of values depending on the parameters that are
available for the selected function shape.
The query:
APPLy?
queries parameters associated with the currently selected
function shape and returns a string of values depending on the
parameters available for the selected function shape. For
example, if the synthesizer is programmed to output a ramp
waveform, the APPL? command returns: "1e+6, 5, 0 , 0, 10, 10,
10".
Example 2
The following example programs the 3152A using the APPLy
command. This example turns on the main output, generates a
square waveform, programs frequency to 2 MHz, programs
amplitude to 5 V and offset to 2.5 V. It also changes the square
wave duty cycle parameter to 25%.
/* Reset the Model 3152A to its default condition as listed in
Table 3-1.*/
:RESet;
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Using The Instrument 3-7
3152A User Manual
Publication No. 980867 Rev. A
/* Change the output waveform to square, frequency to 2 MHz,
amplitude to 5 V, offset to 2.5 V and duty cycle to 25%. Note that
there is no need to use the FUNC:MODE command because the
default value after RESet is FIXed.*/
:APPLy:SQUare 2e6,5,2.5,25
/* Turn the main output on. */
:OUTPut ON
/*Turn the SYNC output on, if required. */
:OUTPut:SYNC ON
If the above commands are executed correctly, a square
waveform will be seen on your oscilloscope.
Output
Configuration
Commands
The output configuration commands control the output function,
shape, frequency, amplitude, filter and state. Optional modes
are omitted from these commands.
Selecting an
Output Function
Type
Use the following command to select the output function type:
FUNCtion:MODE {FIXed | USER | SEQuence | SWEep}
When "FIXed" is selected, the synthesizer outputs the standard
waveform currently selected by the FUNC:SHAP command.
When "USER" is selected, the synthesizer outputs the arbitrary
waveform currently selected by the TRAC:SEL command. When
"SEQuence" is selected, the synthesizer outputs the sequence
that is programmed using the SEQ:DEF command. When
“SWEep” is selected, a sweep waveform is calculated according
to the sweep settings and downloaded into the instrument. See
Using Sweep Mode for more information.
CAUTION:
Placing the 3152A in Sweep Mode overwrites any
waveforms, segments or sequences that are currently
stored in 3152A memory. Be sure to back up any critical
data stored in the 3152A before entering Sweep Mode.
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Publication No. 980867 Rev. A
3152A User Manual
The query:
FUNCtion:MODE?
queries the output function type and returns either FIX, USER,
SEQ or SWE.
Selecting a
Standard
Function Shape
Use the following command to select a standard output function:
FUNCtion: SHAPe {SINusoid | TRIangle | SQUare |
PULSe | RAMP | SINC | EXPonential | GAUSsian | DC}
The selected waveform is output using the previously selected
frequency, amplitude, offset, and other relevant settings. The
standard waveform will be output only after the
FUNC:MODE:FIX command is selected.
The query:
FUNCtion:SHAPe?
queries the standard function shape and returns either SIN, TRI,
SQU, PULS, RAMP, SINC, EXP, GAUS or DC.
Changing the
Frequency and
Sample Clock
Use the following command to change the frequency for
standard waveforms and sample clock for arbitrary waveforms:
FREQuency {<frequency> | MINimum | MAXimum}
MIN selects the lowest frequency allowed for the currently active
function. MAX selects the highest frequency allowed for the
currently active function. The default frequency setting is 1 MHz
for all functions.
The query:
FREQuency?
queries the frequency setting for the standard function currently
active and returns a value in Hertz.
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Using The Instrument 3-9
3152A User Manual
Publication No. 980867 Rev. A
The command:
FREQuency: RASTer {<frequency> | MINimum |
MAXimum}
sets the sample clock frequency for the user and sequenced
functions. MIN selects the lowest frequency allowed for the
currently active segment or sequence. MAX selects the highest
frequency allowed for the currently active segment or sequence.
The default sample clock frequency setting is 1 MHz for all
functions.
Note that the output frequency depends on the number of points
specified in the waveform. The output frequency can be
computed using the following formula: Output Frequency =
Sample Clock / Number of points in the active segment.
The query:
FREQuency:RASTer?
queries the sample clock frequency setting for the arbitrary
segment or sequence currently active and returns a value in
Hertz.
Selecting the
Sample Clock
Source
Use the following command to select the source for the sample
clock for the user and sequenced functions:
FREQuency:RASTer:SOURce {EXT | INT | ECLTrg0}
EXT selects an external clock source. The external source is
applied to the front panel CLOCK IN connector. INT selects the
internally synthesized clock synthesizer. ECLTrg0 selects a
sample clock that is available on the backplane. Note that
ECLTrg0 is always the active sample clock source when the
3152A is set to operate as a slave in phase synchronization
mode.
The query:
FREQuency:RASTer:SOURce?
queries the sample clock source setting and returns EXT, INT or
ECLT0.
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Publication No. 980867 Rev. A
Programming the
Output Amplitude
and Offset
3152A User Manual
Use the following command to program the peak-to-peak
amplitude for the generated waveform.
VOLTage {<amplitude>|MINimum|MAXimum}
MIN selects the smallest amplitude. MAX selects the largest
amplitude. The default amplitude is 5.00 V (into 50Ω).
The query:
VOLTage?
queries the output amplitude for the currently selected function
and returns a value in volts.
The command:
VOLTage:OFFSet <offset>
sets the offset for the currently active function. The default offset
is 0 V.
The query:
VOLTage:OFFSet?
queries the output offset for the currently selected function and
returns a value in volts.
Selecting the
Filter Type
Before selecting the filter type, use the following command to
activate the filter:
OUTPut: FILTer { OFF | ON}
ON enables the filter that has been selected with the
OUTP:FILT:FREQ command. The default filter state setting is
OFF.
The query:
OUTPut:FILTer?
queries the output filter state and returns "0" (OFF) or "1" (ON).
The command:
OUTPut:FILTer:FREQuency {<20MHz | 25MHz |
50MHz>}
Astronics Test Systems
Using The Instrument 3-11
3152A User Manual
Publication No. 980867 Rev. A
sets the filter frequency for the currently active function. 20 MHz
has a Gaussian response, and the 25 MHz and the 50 MHz
filters have an Elliptical response. Note that the filters cannot be
changed if the synthesizer is set to output sine waveform from its
standard waveform library. The filters will be activated only after
the OUTP:FILT ON command. The default filter setting is 20
MHz. Note also that 20 MHz, 25 MHz and 50 MHz designate
filter types. These parameters should be programmed as
switches, not as values. The filter type cannot be programmed
using OUTP:FILT:FREQ 25e6 or OUTP:FILT:FREQ 50e6 Hz.
The query:
OUTPut:FILTer:FREQuency?
queries the currently selected filter setting and returns 20 MHz,
25 MHz or 50 MHz.
Activating the
Backplane
ECLTRG and
TTLTRG Lines
The 3152A can transmit and receive signals on the VXIbus
ECLTRG and TTLTRG lines.
Use the following command to activate one of two backplane
ECLTRG lines:
OUTPut: ECLTrg<n> { OFF | ON}
<n> designates the activated trigger line; 0 and 1 are available.
ON enables the selected trigger line. The trigger source for this
line can be selected with the TRIG:SOUR command. The default
ECLTrg<n> state is OFF.
The query:
OUTPut:ECLTrg<n>?
queries the ECLTrg<n> state and returns "<n>,0" (OFF) or
"<n>,1" (ON).
Turning on ECLTRG0 causes the module sample clock signal to
be routed onto the VXI backplane. Other 3152As may be set up
to receive this sample clock using the command
FREQ:RAST:SOURCE ECLTRG0 (See Selecting the Sample
Clock Source). ECLTRG1 should not be enabled onto the
backplane. Note that ECLTRG0 and ECLTRG1 are both used
for Inter-Module Synchronization.
The TTLTRG lines can be used to transmit and receive trigger
signals between the 3152A and other VXIbus modules.
Use the following command to activate one of eight backplane
Using The Instrument 3-12
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Publication No. 980867 Rev. A
3152A User Manual
TTLTRG lines:
OUTPut: TTLTrg<n> { OFF | ON}
<n> designates the activated trigger line and 0 through 7 are
available. ON enables the selected trigger line. The trigger
source for this line can be selected with the TRIG:SOUR
command. The default TTLTrg<n> state setting is OFF.
The query:
OUTPut:TTLTrg<n>?
queries the TTLTRG<n> state and returns "<n>,0" (OFF) or
"<n>,1" (ON).
Assigning the
Validating Source
For TTLTRG
The TTLTRG signals, when enabled and placed on the
backplane, can be asserted with signals coming from a number
of sources. Use the following command to assign the signal
source for the active TTLTRG line:
OUTPut:TRIGger:SOURce {BIT | LCOMplete |
INTernal | EXTernal}
BIT
Generates a trigger signal at any point in the
waveform. The trigger position within the
waveform can be programmed using the
OUTPUT:SYNC:POS:POIN
command.
This
command is used to set both the TRIGger point
and the SYNC point.
LCOMplete
Generates a trigger signal in SEQuence mode
only once when the selected segment appears for
the first time.
INTernal
Generates a trigger signal at intervals set by the
internal trigger generator.
EXTernal
Generates a trigger signal every time a trigger is
applied to the front panel TRIG IN connector.
The query:
OUTPut:TRIGger:SOURce?
queries the validating signal source for the backplane
TTLTRG<n> lines and returns BIT, LCOM, INT or EXT.
Astronics Test Systems
Using The Instrument 3-13
3152A User Manual
Enabling the Main
Output
Publication No. 980867 Rev. A
For safety reasons, the main output default setting is OFF.
Disable or enable the main output using the following command:
OUTPut {OFF | ON}
When the main output state is programmed to ON, the output
connector is connected to the output amplifier through a 50Ω
resistor. In the OFF position, the output connector is
disconnected from the output amplifier by means of a
mechanical relay. Ensure that voltage is not applied to the main
output connector when the 3152A output state is programmed to
ON.
The query:
OUTPut?
queries the state of the main output and returns "0" (OFF) or "1"
(ON).
Enabling the
SYNC Output
For safety reasons, the SYNC output default setting is OFF.
Disable or enable the SYNC output using the following
command:
OUTPut: SYNC {OFF | ON}
When the SYNC output state is programmed to ON, the SYNC
output connector generates signals which are triggered by
signals selected using the SYNC:SOUR command. In the OFF
position, the SYNC connector has no output. It is connected
electrically to the internal circuitry at all times. Ensure that
voltage is not applied to the SYNC at any time. The default
SYNC position is the 6th point from the end of the waveform.
The position of the SYNC signal can be programmed using the
OUTPUT:SYNC:POS:POIN command.
The query:
OUTPut:SYNC?
queries the state of the SYNC OUTPUT and returns "0" (OFF) or
"1" (ON).
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Publication No. 980867 Rev. A
Assigning the
Source For The
SYNC Output
3152A User Manual
The SYNC output, when enabled, can be triggered by signals
coming from a number of sources. Use the following command
to select the source for validating the SYNC output:
OUTPut:SYNC:SOURce
HCLock | PULSe}
{BIT
|
LCOMplete
|
SSYNc
|
BIT
Generates a narrow sync signal every time the
segment is generated. The sync position along
the waveform can be programmed using the
OUTP:SYNC:POS command. OUTP:SYNC:POS
is used to set both the TRIGger point and the
SYNC point. The BIT signal is recommended for
use in countinuous mode.
LCOMplete
Generates a sync signal in SEQuence mode only
once when the selected segment appears for the
first time in the sequence. The identity of the
segment can be programmed using the
TRAC:SEL command. The sync position along
the selected waveform can be programmed using
the OUTP:SYNC:POS command. The LCOM
signal is recommended for use in Sequence
mode.
SSYNc
Generates a sync signal at intervals that are
synchronized with the internal clock generator.
This option is useful to minimize jitter when using
an oscilloscope. The SSYNc signal is
recommended for use in Triggered mode.
HCLock
Generates a trigger signal at intervals equal to
half of the period of the sample clock. This option
is useful for synchronizing two-point waveforms
on an oscilloscope (sine and square waveforms
above 10 MHz).
PULSe
Generates a pulse each time a segment
waveform is generated. The pulse width is
specified in points using the OUTP:SYNC:WIDTh
command. This command is a useful alternative
to the BIT sync source, especially when the bit
pulse is too narrow. It is also helpful when using
the 3152A to emulate the sync pulse of another
instrument that it is replacing in a test system.
The query:
OUTPut:SYNC:SOURce?
queries the signal source for the SYNC output and returns BIT,
LCOM, SSYN, HCL or PULS.
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Using The Instrument 3-15
3152A User Manual
Selecting the
SYNC Position
Publication No. 980867 Rev. A
The SYNC output can be programmed to output the SYNC
signal at any point along the output waveform. Use the following
command to select the SYNC output position:
OUTPut:SYNC:POSition[:POINt] <value>
The SYNC position can be selected from point 0 to the last point
of the active waveform. SYNC position has to be programmed
for each segment. The default SYNC position is 6 points from
the end of the segment.
The query:
OUTPut:SYNC:POSition:POINt?
Queries the output SYNC position and returns an integer value.
Setting the Sync
Pulse Width
The sync output can be programmed to output a pulse with a
programmable pulse width. Use the following command to set
the sync pulse width:
OUTPut:SYNC:WIDTh <value>
The sync pulse width can be set to any number between 2 and
500 points. Sync width can be calculated by multiplying the
Sampling Clock Period x OUTP:SYNC:WIDTh.
The query:
OUTPut:SYNC:WIDTh?
Queries the output sync width and returns an integer value.
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Publication No. 980867 Rev. A
Using the Built-In
Standard
Waveforms
3152A User Manual
The Standard Waveform commands control the various
parameters of the active Standard Waveform. Standard
waveform commands operate in a similar fashion for each of the
Standard Waveforms. To simplify the description of this set of
commands, only the standard waveform commands for the
PULSe function are described. Use the same procedure to
program parameters for the SINe, TRIangle, RAMP, SQUare,
SINC, GAUSsian, EXPonential and DC waveforms.
The number of points used to define each Standard Waveform
varies. For SINe and SQUare:
Freq ≤ 200kHz
Points = 500
Freq < 200kHz
Points =
Freq > 10MHz
Points = 10
100 MHz
Freq
For RAMP, PULSE, GAUSSian and EXPonential:
Freq ≤ 100kHz
Points = 1000
Freq > 100kHz
Points =
100 MHz
Freq
For TRIangle and SINC:
Freq ≤ 200kHz
Points = 500
Freq > 200kHz
Points =
100 MHz
Freq
The equations used for generating EXPonential, GAUSian and
SINC functions are as follows:
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3152A User Manual
Publication No. 980867 Rev. A
For the Positive EXPonential:
F ( m) = −
m
A A  7.7 t 
+ e − 1
2 2

Where
A = Amplitude
m = Current point (I..N)
N = Total number of points
t = Time constant set by user
For the Negative EXPonential:
2 2
A
F (m) = Ae − m /t −
2
For GAUSsian:
2 2
A
F (m) = Ae − m /t −
2
For SINC:
F ( m) =
Where R =
m
)• A
R
m
2π
R
Sine(2π
N
(number of points per cycle)
cyc
cyc = Number of cycles of SINC
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Publication No. 980867 Rev. A
3152A User Manual
The selected standard waveform will be available at the output
connector only after the FUNC:MODE FIX command has been
executed.
With the FUNC:SHAP PULS selection, parameters for the
PULSe function will effect the output waveform when modified.
Note that changes made to parameters for a specific function do
not have any effect on other functions. Also, changes made to
other function parameters while the pulse shape is selected will
not have any effect until that pulse shape is selected.
The command:
PULSe: DELay <value>
Sets the pulse delay in percent of the pulse period. For example,
if the pulse period is 100 ms, 10% will delay the first transition of
the pulse by 10 ms. Delay is measured from trigger to the first
turning point.
The query:
PULSe:DELay?
queries the pulse delay setting and returns a value in percent.
The command:
PULSe: TRANsition <value>
sets the pulse rise time in percent of the pulse period. For
example, if the pulse period is 100 ms, 5% rise time equals 5
ms. Pulse rise time is measured between the two turning points
of the first transition.
The query:
PULSe:TRANsition?
queries the pulse rise time setting and returns a value in percent.
The command:
PULSe: WIDTh <value>
sets the pulse width in percent of the pulse period. For example,
if the pulse period is 100 ms, 20% pulse width equals 20 ms.
Pulse width is measured between the two turning points on the
top of the pulse. The query:
PULSe:WIDTh?
queries the pulse width setting and returns a value in percent.
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Using The Instrument 3-19
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Publication No. 980867 Rev. A
The command:
PULSe:TRANsition: TRAiling <value>
sets the pulse fall time in percent of the pulse period. For
example, if the pulse period is 100 ms, 15% fall time equals 15
ms. Pulse fall time is measured between the two turning points
of the second transition.
The query:
PULSe:TRANsition:TRAiling?
queries the pulse fall time setting and returns a value in percent.
Selecting an
Operating Mode
The 3152A offers four operating modes: Continuous, Triggered,
Gated and Burst. The selected waveform is repeated
continuously when the instrument is set to operate in Continuous
mode. In this mode, the 3152A does not require a trigger source
to stimulate its output cycles. The default operating mode of the
instrument is continuous.
Triggered, Gated, and Burst modes require an external signal to
initiate output cycles. Information on how to trigger, gate and
output a burst of waveforms is given in the following paragraphs.
Triggered Mode
In Triggered mode, the output remains at a certain DC level as
long as the TRIG IN signal from the front panel remains inactive.
A TTL signal is used to stimulate the TRIG input. The
synthesizer is sensitive to either the rising edge or the falling
edge. Each time a transition at the trigger input occurs, the
3152A generates one complete output waveform. At the end of
the output cycle, the output resumes position at a DC level equal
to the last point of the waveform.
The Triggered mode operates on standard waveforms and
arbitrary waveforms. Observe the limitations of the trigger signal
as listed in the specification section of this manual. Note that for
Standard Waveforms, other than square wave, the 3152A is
limited to signal frequencies of 10 MHz or less. To place the
3152A in Triggered mode, use the following command:
INITitiate:CONTinuous {OFF | ON}
Using The Instrument 3-20
Astronics Test Systems
Publication No. 980867 Rev. A
3152A User Manual
OFF places the instrument in Triggered mode. ON restores
continuous operation.
The query:
INITitiate: CONTinuous?
queries the instrument operating mode parameter and returns
"0" (OFF) or "1" (ON).
Gated Mode
The 3152A can be set to operate in Gated mode only after the
INIT:CONT OFF command has been received. The output
remains at a certain DC level as long as the TRIG IN signal from
the front panel remains inactive. A TTL level signal is used to
stimulate the TRIG input. The gating signal can be programmed
to be either active high or active low. Each time the proper level
is present at the trigger input connector, the 3152A generates
output waveforms as long as the gate signal is present. When
the gate signal is de-asserted, the output completes the last
cycle and resumes position at a DC level equal to the last point
of the waveform.
Gated mode operates on standard waveforms, arbitrary
waveforms, and on sequences of waveforms. Observe the
limitations of the gating signal as listed in the specification
section of this manual. To place the 3152A in Gated mode, use
the following commands:
INIT:CONT OFF
TRIGger: GATE {OFF | ON}
The default state for the Gated mode is OFF. Turning Gated
mode ON automatically turns Burst mode off.
The query:
TRIGger:GATE?
queries the gate state and returns "0" (OFF) or "1" (ON).
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Using The Instrument 3-21
3152A User Manual
Burst Mode
Publication No. 980867 Rev. A
Burst mode is very similar to Triggered mode with the exception
that only one trigger signal is needed to generate a counted
number of output waveforms. In Burst mode, the output remains
at a certain DC level as long as the TRIG IN signal from the front
panel remains inactive. A TTL signal is used to stimulate the
TRIG input. The generator is sensitive to either the rising edge or
the falling edge. Each time a transition at the trigger input occurs,
the 3152A generates a number of output cycles that have been
programmed in the burst count parameter. At the end of the burst,
the output resumes position at a DC level equal to the last point
of the waveform. The burst count is programmable from 1 to 106.
The default burst value is 1.
The Burst mode operates on standard waveforms and arbitrary
waveforms. Note that the 3152A cannot operate in Sequence and
Burst modes simultanously. Observe the limitations of the trigger
signal as listed in the specification section of this manual. To
place the 3152A in Burst mode, use the following commands:
INITitiate:CONTinuous OFF
TRIGger: BURSt ON
TRIGger: COUNt <counts>
INIT:CONT OFF places the 3152A in a non-continuous mode.
TRIG:BURS ON turns the burst function on. The TRIG:COUN
specifies the number of waveforms output after a qualified trigger
signal. To ensure proper operation, enable Burst mode after
setting up the burst parameters. When Burst mode is enabled,
previously programmed Trigger or Gate modes turn off
automatically.
The query:
TRIGger:BURSt?
queries the state off Burst mode and returns "0" (OFF) or "1"
(ON).
The query:
TRIGger:COUNt?
queries the burst count and returns an integer.
Using The Instrument 3-22
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Publication No. 980867 Rev. A
Selecting the
Trigger Source
3152A User Manual
When an external source is not available, the operator has the
option to use either the built-in trigger generator or a
TTLTRG<n> signal to stimulate its output. Use the following
command to select the trigger source for the instrument:
TRIGger:SOURce: ADVance {EXTernal | INTernal | TTLTrg<n>}
EXT is the default trigger source for the 3152A. Select the
TTLT<n> option with <n> ranging from 0 to 7 to use one of the
TTLTRG lines available on the backplane. Select INT to use the
internal trigger generator. Remember to program the period of
this generator (as shown later).
The query:
TRIGger:SOURce:ADVance?
queries the trigger source and returns EXT, INT or TTLT<n>.
Using the Internal
Trigger Generator
The internal trigger generator is a free-running generator which
is asynchronous with the main output generator. When the
internal trigger source is selected, the front panel TRIG IN signal
is inactive. The internal trigger generator is also available in
Burst mode, but has no effect in Gated mode. To use the
internal trigger generator, place the instrument in Triggered
mode, but select the internal trigger generator as the trigger
source. Then use the following command to program an internal
trigger period:
TRIGger: TIMer <value>
The period of the internal trigger generator can be programmed
from 15 µs to 1000 s. The default period is 100 µs. The internal
trigger generator is ignored when either an external or TTLT
source is enabled.
The query:
TRIGger:TIMer?
queries the period of the internal trigger generator and returns a
value in seconds.
Astronics Test Systems
Using The Instrument 3-23
3152A User Manual
Selecting the
Trigger Slope
Publication No. 980867 Rev. A
The trigger slope command selects the sensitive edge of the
trigger signal that is applied to the TRIG IN connector. The
3152A can be made sensitive to either positive or negative
transitions. Use the following command to select the edge
sensitivity for the trigger signal:
TRIGger: SLOPe {POSitive | NEGative}
Positive going transitions will trigger the 3152A when the POS
option is selected. Negative transitions will trigger the 3152A
when the NEG option is selected. POS is the default slope.
The query:
TRIGger:SLOPe?
queries the trigger slope and returns POS or NEG.
Using the Trigger
Delay
The trigger delay command delays the output of a triggered or
burst waveform by a specified number of sample clock cycles by
a value of 10 to 2 million cycles. Actual delay is calculated by
Tdelays = Dcycles
fSCLK
where Dcycles is the programmed delay and
fSCLK is the sample clock frequency setting. Enable or disable this
feature by setting the STATe:
TRIGger:DELay:STATe {OFF | ON}
TRIGger:DELay:
<value>
The queries:
TRIGger:DELay:STATe?
TRIGger:DELay?
query the state of the trigger delay feature and the delay value.
Using The Instrument 3-24
Astronics Test Systems
Publication No. 980867 Rev. A
Selecting the
Trigger Level
3152A User Manual
The trigger level command sets the threshold level at the trigger
input connector. Trigger levels are adjustable from -10 V to +10
V with up to 4 digits. Trigger level resolution is always 10 mV.
Use the following command to set the trigger level for the trigger
signal:
TRIGger:LEVel <value>
This sets the trigger level for the signal which is applied to the
TRIG IN. The default value is 1.6 V so there is no need to modify
this value if you apply a TTL level signal to the trigger input.
TRIGger:LEVel?
queries the trigger level and returns a value in Volts.
Using the Soft
Trigger
There are a number of commands that are available to trigger
the 3152A. The soft trigger command is one of them. To use the
soft trigger command, place the instrument in the TRIG:SOUR
EXT mode. Soft trigger is ignored in the internal or TTLTrg<n>
modes. Use the following SCPI commands to trigger the
instrument:
TRIGger
The IEEE-STD-488.2 common command *TRG will have the
same effect. Use either software command to trigger the 3152A
in Trigger, Burst and Triggered Sequence Advance modes.
Generating
Arbitrary
Waveforms
Astronics Test Systems
The 3152A cannot generate arbitrary waveforms without first
loading them into memory. A description of the arbitrary
waveform function and an explanation on how to load waveforms
into memory is given in the following paragraphs.
Using The Instrument 3-25
3152A User Manual
What Are
Arbitrary
Waveforms?
Publication No. 980867 Rev. A
Arbitrary waveforms are generated from digital data points that
are stored in memory. Each data point has vertical resolution of
12 bits (4096 points), i.e., each sample is placed on the vertical
axis with a precision of 1/4096.
Arbitrary waveform memory has the capacity to store up to 512K
of horizontal data points. Each horizontal point has a unique
address - the first being 00000 and the last being 523,287. In
cases where smaller wavelengths are required, the 3152A's
waveform memory can be divided into smaller segments. Then it
is possible to select which segment is sampled, how many times
and in what sequence.
When the instrument is programmed to output arbitrary
waveforms, a clock samples the data points (one at a time) from
address 0 to the last address. The rate at which each sample is
replayed is defined by the sample clock rate parameter. The
3152A provides programmable sample clock rates from 100mHz
to 100MHz.
Unlike the built-in standard waveforms, arbitrary waveforms must
first be loaded into the instrument’s memory. Correct memory
management is required for best utilization of the arbitrary
memory. An explanation of how to manage arbitrary waveform
memory is given in the following paragraphs.
Arbitrary Memory
Management
Using The Instrument 3-26
The 3152A's arbitrary memory consists of a fixed length of
524,288 words. 1000 words are always reserved for the built-in
standard waveforms. The maximum size arbitrary waveform that
can be loaded into memory is 523,288 points long. It is not
necessary to use the complete length of this memory. The
memory can be partitioned into smaller segments and different
waveforms can be loaded into each segment. The memory can
be partitioned into 4096 segments, each having a unique length
and identity. Minimum segment length is 10 points. Information
on how to partition the memory is given in the following
paragraphs.
Astronics Test Systems
Publication No. 980867 Rev. A
Memory
Management
Commands
3152A User Manual
Arbitrary memory can be divided into smaller segments; up to
4096 different arbitrary waveforms can be generated with the
3152A. The length of each segment is left totally to the user’s
discretion. To partition the arbitrary waveform memory, use the
following command:
TRACe: DEFine <segment_number>,<length>
Note that numbers, not names, are assigned to segments that
are defined. Numbers can range from 1 through 4096. The order
of assignment is not important as long as the size of the
segments, having already been defined, is not changed. You
cannot query the TRAC:DEF command so you must keep good
track if you intend to partition the memory into many segments.
If a mistake is made and removal of one or more segments from
the active directory is needed, use the following command:
TRACe: DELete <n>
where <n> is the number of the segment to be removed from
memory. Note that if a segment is deleted, the memory portion
that belonged to this segment is no longer accessible. The next
segment that is defined will be placed after the last defined
memory segment. However, if the last segment is deleted, the
next downloaded segment will be written on top of the deleted
one. There is danger that by using the TRAC:DEL command
often large portions of memory will remain unused. It is,
therefore, recommended to periodically clear the entire memory
and only reload waveforms that will be used.
To partition the memory from the beginning, use the following
command:
TRACe:DELete: ALL
CAUTION:
This command will destroy waveforms that were previously
loaded into memory. After using this command, waveform
segments will line-up from address 0 upwards.
Astronics Test Systems
Using The Instrument 3-27
3152A User Manual
Loading Arbitrary
Waveforms
Publication No. 980867 Rev. A
There are two ways to load waveforms into the 3152A; using a
graphical user interface, i.e., WaveCAD, or low-level
programming. When using WaveCAD, disregard most of this
chapter as WaveCAD does the work for you. When writing your
own code, use the following commands to load data into a
specific memory segment.
First, define the work area. Define the segment number and its
associated length. Segment length must be an even number.
For example, to use segment number 8 and give it a length of
1000 points, use this command:
TRACe:DEFine 8,1000
NOTE:
When large numbers of traces need to be defined it may be
beneficial to use the SEGM:DATA command in place of
repeated calls to TRAC:DEF when throughput needs to be
optimized (see the next section for details).
Next, make segment 8 the active segment. The active segment
must be selected because as waveforms are loaded, the 3152A
must be notified as to where to place the data it receives. Select
the active segment using the following command:
TRACe: SELect 8
The next step is to transfer data to the active segment. Data is
loaded into the 3152A using high-speed binary transfer. A
special command is defined by IEEE-STD-488.2 for this
purpose. High speed binary transfer allows any 8-bit bytes
(including extended ASCII code) to be transmitted in a message.
This command is particularly useful for sending large quantities
of data. The 3152A uses this command to receive waveforms
from the controller:
TRACe #42000<binary_block>
This command causes the transfer of 2000 bytes of data (1000)
points into the active memory segment. The ASCII "#" ($23) is
the start of the binary data block. "4" designates the number of
digits that follow. "2000" is the even number of bytes to follow.
The generator represents binary data as 12-bit integers that are
sent as two bytes. Therefore, the total number of bytes is always
twice the number of data points in the waveform. For example,
2000 bytes are required to download a waveform with 1000
points. Bytes are sent in byte-high, byte-low order. The
FORM:SWAP command can be used to reverse this order.
Using The Instrument 3-28
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Publication No. 980867 Rev. A
3152A User Manual
When sending binary blocks to the 3152A, the final byte must be
transmitted with the EOI bit set. Carriage Return and Line Feed
will not be detected as terminators. This permits the values
ODHEX and OAHEX to be used as data points.
The IEEE-STD-488.2 definition of Definite Length Arbitrary Block
Data Format is demonstrated in Figure 3-1.
Figure 3-1, Definite Length Arbitrary Block Data Format
16-bits of data are sent to the 3152A although only 12 bits are
required to generate the waveform. The order of bytes and bits
and their values are shown in Figure 3-2.
D15
D14
D13
D12
D11
D10
D9
D8
D7
WAVEFORM DATA
12-bit Binary Value (0-4096) per Point
D6
D5
D4
D3
D2
D1
D0
4 Control Bits
Must be set to 0000
Figure 3-2, 12-Bit Waveform Data Format
In USER Waveform download mode, 16-bits of data are sent to
the 3152A and all 16-bits are used to generate the waveform
and the control and sync bits. The order of bytes and bits and
their values are shown in Figure 3-3.
Astronics Test Systems
Using The Instrument 3-29
3152A User Manual
Publication No. 980867 Rev. A
D2
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
X
D1
D0
EVEN WAVEFORM POINT
(FLOOR(POS/2)*2)
PHASE BIT
WAVEFORM POINT DATA
STOP BIT
PLL BIT
D15
D14
D13
D12
D11
D10
D9
D8
WAVEFORM POINT DATA
D7
D6
D5
D4
D3
D2
D1
D0
X
X
X
ODD WAVEFORM POINT
(FLOOR(POS/2)*2+1)
SYNC BIT
Figure 3-3, 16-Bit Waveform Data Format
NOTE:
The 3152A operates in interlaced mode where two memory
cells generate one byte of data. Segment size can be
programmed in even-numbers only and the generator can
accept binary blocks of data that are in multiples of 4 only.
For example, 2000 bytes is an acceptable binary block.
2002 is not a multiple of 4, therefore, the generator
automatically adjusts the size to 1002 points (2004 bytes)
and generates an error message.
Using The Instrument 3-30
Astronics Test Systems
Publication No. 980867 Rev. A
High Speed
Segment
Downloads
3152A User Manual
In cases where large numbers of segments must be defined in
3152A memory (e.g., >50), for higher overall throughput (e.g.,
5x-10x improvement) it is recommended that SEGM:DATA be
used instead of a series of TRAC:DEF commands (described in
the above section). The SEGM:DATA command takes the
place of a series of SEQ:DEF commands by packing all
relevent data into a IEEE-STD-488.2 Definite Length Arbitrary
Block Data Format packet.
The format of the command is:
SEGMent:DATA#<header><binary data>
and the header structure is:
Nnnnn
where N = how many digits follow within the header and nnnn is
a decimal number (base 10) defining how many bytes of binary
data will follow. The header is formatted in ASCII numbers. The
number of bytes must be a multiple of 5. Each 5 bytes define
one segment and its associated size.
Header examples:
41000
(1000 bytes in binary format to follow)
510000
(10000 bytes in binary format to follow)
The byte structure of one 5-byte segment definition (there can
be up to 4096 segments) of the Binary Data section is:
2 bytes:
Address
Astronics Test Systems
3 bytes:
Segment Size
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3152A User Manual
Publication No. 980867 Rev. A
The Address field of the 5-byte segment table structure is
calculated as follows:
1. The start address for segment 1 is 0x1F4.
2. Compute the start address for segment n (where n > 1) using
the following equation:
ADDRESS(n) = ADDRESS(n-1) + (SIZE(n-1)/2)
For example, say you have 2 segments, the first is 10,000
points. The start address for segment number 2 is as follows:
ADDRES(2) = ADDRESS(1) + (SIZE(1)/2)
= 500 + 10000/2 = 500 + 5000; and in hex
= 0x1F4 + 0x1388 = 0x157C
Binary section (binary)
Header section (ASCII)
"#"
non-zero
ASCII digit
ASCII digit
Binary Number
Binary # of points for this
waveform segment
Start of
Data Block
Number of Digits
to Follow in header
Byte Count: 5 x Number
of Segments being defined
Segment Address
(Calculated)
Number of points for
this waveform segment
Figure 3-4, High Speed Segment Downloads
Using The Instrument 3-32
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Publication No. 980867 Rev. A
3152A User Manual
The number of points section of the structure is just the 3-byte
binary number representing the size of the waveform.
The SEGM:DATA is useful for speeding up test times when
many waveform segments are required. It is best used as
follows:
Use TRAC:DEF to define segment 1 to be the size of the sum
of the waveform sizes for all waveforms to be downloaded into
segments.
Load shared memory with a binary file representing the data
from all segments to be loaded concatenated together.
Use the SEGM:DATA command to slice the data stored in
segment 1 into n properly sized segments, where n is the
original number of waveforms to be loaded.
This approach will provide the same result as obtained by
loading the individual segments one by one. The difference is
that the data will be loaded much more quickly and efficiently
Reversing Byte
Order
Binary data is sent to the 3152A in byte-high byte-low order.
This order can be reversed using the following command:
BORDer {NORMal | SWAPped}
The default is NORM. This command is useful only for binary
block transfers.
The query:
FORMat:BORDer?
queries the byte order configuration and returns "NORM" or
"SWAP".
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Using The Instrument 3-33
3152A User Manual
Selecting Binary
Download Forma
Publication No. 980867 Rev. A
Binary data is sent to the Model in either 12-bit or 16-bit binary
format. When NORMal 12-bit downloads are used, the 3152A
calculates the start, stop and sync bits stored in memory in the
same data word as the 12-bit waveform points. When USER
16-bit downloads are used, the 3152A allows the user to
download waveform data AND start, stop and sync bit
information. This mode should be used with caution since an
incorrect download can cause unexpected operation of the
3152A. It also can allow the user to create custom sync pulse
patterns. See Loading Arbitrary Waveforms for more
information on waveform formats.
The download mode is selected using the following command:
WAVEform {NORMal | USER}
The default is NORM. This command is applicable only for
binary block transfers
The query:
FORMat:WAVEform?
queries the waveform download format and returns either
"NORM" or "USER."
Using Shared
Memory
Shared memory transfer is the fastest way to get waveforms
into the 3152A. In shared memory mode, the 3152A's CPU
disconnects from the waveform memory and passes access to
the VXIbus. The internal data bus is connected directly to the
VXIbus, and data is downloaded into the memory in binary
blocks using A24 memory space. Byte and bit order are the
same as with the Arbitrary Block transfers as shown in Figures
3-1 and 3-2. After the data is loaded into the 3152A, control is
returned to the instrument.
In shared memory mode, the 3152A’s memory acts similar to
Direct Memory Access (DMA). The instrument has to be told
when to receive data, send data, surrender control or gain
control. The 3152A has an auto-increment address counter.
The Slot 0 Controller need only select the base address for both
write and read cycles.
Shared Memory commands are
explained below.
To write to or read from a segment, the user must first define
the segment using the command TRACe:DEFine. The trace
must then be selected using the command TRACe:SELect.
Refer to Loading Arbitrary Waveforms for more information.
The command:
Using The Instrument 3-34
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Publication No. 980867 Rev. A
3152A User Manual
SMEMory:MODE {READ | WRITe}
sets the instrument to receive data from (WRITE) or send data
(READ) to the VXIbus.
The query:
SMEMory:MODE?
queries the shared memory mode and returns READ or WRITE.
The command:
SMEMory:STATe {OFF | ON}
places the 3152A in the shared memory state when ON is
selected. After this, the instrument cannot accept normal
commands. Data must be sent to the synthesizer using shared
memory access. Normal command mode is resumed when the
SMEMory:STATe is changed to OFF.
The query:
SMEMory:STATe?
queries the shared memory state and returns "0" (OFF) or "1"
(ON).
The following sequence should be used for shared memory
transfers.
1.
Slot 0 sends commands:
TRAC:DEF (n),(m) (Shared Memory write only)
TRAC:SEL <n>
SMEM:MODE {READ WRITE}
SMEM:STATE ON
2.
Slot 0 repeatedly sends:
*OPC?
When response is 1, shared memory transfers may start.
3.
Slot 0 sends command:
SMEM:STATE OFF
once data transfer is complete.
The *OPC? Response is set to 1 when the 3152A has
transferred memory access from the internal CPU to shared
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Publication No. 980867 Rev. A
memory. This typically takes a few milliseconds but depends
on the size of the memory transfer.
16-Bit Shared
Memory Download
When you download waveform data using the standard shared
memory routine, the 3152A accepts waveform data only and the
internal CPU places the various bits that control segment
length, SYNC position, etc. Look at Figure 3-3 and observe that
you must download 16 bits, of which only 12 determine point
value while the other 4 bits are not used.
The process of downloading waveforms, using the standard
shared memory mode requires a few steps: 1) Select segment,
2) Define segment length, 3) Define SYNC position, 4) Select
the active segment. These four operations are multiplied by the
number of segments to be programmed to get the total.
The 16-bit shared memory download mode lets you bypass all
of these steps and program the entire memory, including SYNC,
trigger start point, PLL phase point and stop bit in one download
process, thus saving valuable time.
There is a basic difference between the two download modes.
The standard shared memory download mode lets you
download waveforms alone. After the waveform has
downloaded the CPU takes control and performs the basic
tasks such as placing the data at the appropriate start address
and initializing the SYNC, PLL, phase and stop bits. The
information to set these bits is calculated by the CPU and
therefore, the CPU is in control.
In contrast, when 6-bit shared memory downloads are used,
control is passed from the instrument to the user. In this case,
the CPU does not perform control bit settings and it is entirely
up to the user to initialize control bits properly, otherwise the
3152A will not generate waveforms as expected.
Use the commands below to download waveform data using
16-bit shared memory download mode:
Change the download mode to 16-bit using the following
command:
FORMat:WAVE {NORMal | USER}
NORM is the default setting. USER places the 3152A into 16-bit
memory download mode.
Using The Instrument 3-36
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Publication No. 980867 Rev. A
3152A User Manual
WARNING:
Changing modes from NORM to USER and vice-versa is
destructive to the waveform memory. This command has
an affect on the segment table and SYNC and break point
bits location. Other parameters, such as amplitude, offset
and sample clock frequency are not affected by this
command.
The query:
FORMat:WAVE?
queries the waveform download mode and returns NORM or
USER.
The command:
SMEMory: {OFF | ON}
toggles the shared memory state. OFF is the default position.
After this command, the instrument cannot accept normal
commands. Data must be sent to the generator using shared
memory access. Normal command mode is resumed when the
SMEMory:STATe is changed to OFF.
The query:
SMEMory?
queries the shared memory state and returns "0" (OFF) or "1"
(ON).
Following the SMEM ON command, you can start downloading
waveform data. Figure 3-3 shows an example of waveform
data points. Explanation of the various words and control bits
are given below.
Things to consider when you lay out your data:
1. Waveform data points are made of 16-bit words.
2. Minimum number of words to download is 10.
3. Words are downloaded in groups of 2. Therefore, the
minimum number of groups is 5.
4. In each word, D2 is ignored while D1 and D0 are also
ignored in odd words only. D3 is used for the PLL bit in
even words and the SYNC bit in odd words. D1 in even
words is the stop bit and D0 in even words is the phase
bit. D4 through D15 are used for point data. D15 is the
MSB
Astronics Test Systems
Using The Instrument 3-37
3152A User Manual
Publication No. 980867 Rev. A
The Control Bits
There are four control bits that must be loaded within a group of
two words, they are the PLL, trigger phase offset, SYNC and
stop bits.
The control bits are located as shown in the figure. Note that the
odd-even order of these bits is critical.
The bits are described below:
PLL Bit – This bit is a don’t care unless the 3152A will be used
in PLL mode to lock to an external analog (or digital) signal.
This bit represents the phase shift of the waveform with respect
to the input trigger point. Exactly one PLL bit may be set per
waveform segment for proper operation of the PLL mode of the
3152A.
Trigger Phase Offset Bit – The trigger phase offset bit
determines the offset point in the waveform where the
waveform starts after receiving a trigger signal. Like the PLL bit,
Trigger phase offset bits can be placed in one location only.
SYNC Bit – The SYNC bit determines the offset point on the
waveform where the 3152A outputs a SYNC signal. The SYNC
signal width is always 2 sample clock cycles wide per SYNC bit
set. Multiple SYNC bits can be placed at any location along the
length of the programmed waveform segment to create complex
sync signals.
Stop Bit – The Stop bit determines the end point of the
waveform. Stop bits can be placed in one location only for
typical. If you place multiple stop bits, the waveform will stop at
the first stop bit encountered. The waveform will actually stop at
the waveform point after the one with the stop bit set.
D2
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
X
D1
D0
EVEN WAVEFORM POINT
(FLOOR(POS/2)*2)
PHASE BIT
WAVEFORM POINT DATA
STOP BIT
PLL BIT
D15
D14
D13
D12
D11
D10
D9
D8
WAVEFORM POINT DATA
D7
D6
D5
D4
D3
D2
D1
D0
X
X
X
ODD WAVEFORM POINT
(FLOOR(POS/2)*2+1)
SYNC BIT
Figure 3-3 (Repeated), 16-Bit Waveform Data Format
Using The Instrument 3-38
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Publication No. 980867 Rev. A
3152A User Manual
Sequenced waveforms are a means of adding more capability
to the synthesizer. The 3152A can link 4096 segments and loop
on each segment up to 106 times.
Sequences
Generating Sequenced Waveforms
What Are
Sequenced
Waveforms?
Sequenced waveforms are made of a number of arbitrary
waveforms that can be linked and repeated in various manners.
Sequenced waveforms are generated from waveforms stored in
a library of memory segments. Before using a sequence of
waveforms, load arbitrary memory with the required waveforms.
Use TRAC# or shared memory methods to load waveforms into
memory.
Information on how to partition the memory and load waveforms
is given in the section entitled Generating Arbitrary
Waveforms.
An example of how sequenced waveforms work is
demonstrated in the following figures. Figure 3-5 shows a
sine(x)/x waveform that was loaded into segment 1. Figure 3-6
shows a sine waveform that was loaded into segment 2.
Figure 3-7 shows a pulse waveform that was loaded into
segment 3.
The sequence generator lets you link segments in user-defined
order and repeat each segment as many times as needed.
Figure 3-5, Sin(x)/x Waveform Loaded Into Segment 1
Astronics Test Systems
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3152A User Manual
Publication No. 980867 Rev. A
Figure 3-6, Sine Waveform Loaded Into Segment 2
Figure 3-7, Pulse Waveform Loaded Into Segment 3
Figure 3-8 shows a sequence of waveforms that were stored
in three different memory segments. Note that segment
number 2 is generated first and repeated twice, segment 3
follows once and then segment 1 is repeated four times.
Sequence Commands
The following is an overview of how to define and program a
sequence of arbitrary waveforms.
Figure 3-8, Sequenced Waveforms - Continuous Advance Mode
Using The Instrument 3-40
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Publication No. 980867 Rev. A
3152A User Manual
A sequence is made of steps. A step can stand on its own or
link to another step. It is possible to have only one step in a
sequence but the output will look like a continuous waveform.
If only one step is specified and the 3152A is placed in
Triggered mode, the output will behave as it would in Burst
mode where the repeat number replaces the burst count
parameter.
Aside from step numbers, each step has two other parameters:
segment number and repeat counter. The segment number
specifies which segment will be linked, and the repeat counter
specifies how many times the segment will repeat. Use the
following command to generate a sequence:
SEQuence:DEFine {<step_number>,
<segment_number>,<repeat>}
Use this command up to 4095 times, each time for a different
step and for a different segment number and repeat
combination. Note that the same segment number can be used
for different sequence steps. The SEQ:DEF command does
not change the FUNC:MODE setting. Unless the FUNC:MODE
SEQ command is used, the SEQ:DEF command will have no
immediate effect on the output waveform or function.
NOTE:
The SEQ:DATA command be used in place of a series of
SEQ:DEF commands if higher throughput is needed (see
the next section).
The sequence generator goes through the steps in descending
order. In the continuous operating mode, the sequence is
repeated automatically after the last step has been completed.
When the generator is set to operate in Triggered mode, the
output stops at the last point of the last waveform in the
sequence. In Gated mode, the sequence is always completed
after the gate stop signal.
If removal of a step from the sequence is required, use the
following command:
SEQuence:DELete <n>
where <n> is the step number to be removed from the
sequence.
To delete all sequences, use the following command:
SEQuence:DELete:ALL
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Publication No. 980867 Rev. A
CAUTION:
The above command will destroy sequences previously
loaded into memory.
High Speed
Sequence
Downloads
In cases where large numbers of sequence steps must be
downloaded to the 3152A (e.g., >50), for higher overall
throughput (e.g., 5x-10x improvement) it is recommended that
SEQ:DATA be used instead of a series of SEQ:DEF commands
(described in the above section). The SEQ:DATA command
takes the place of a series of SEQ:DEF commands by packing
all relevent data into a IEEE-STD-488.2 Definite Length
Arbitrary Block Data Format packet.
The format of the command is:
SEQuence:DATA#<header><binary data>
and the header structure is:
Nnnnn
where N = how many digits follow within the header and nnnn is
a decimal number (base 10) defining how many bytes of binary
data will follow. The header is formatted in ASCII numbers. The
number of bytes must be a multiple of 5. Each 5 bytes define
one step and its associated looping.
Header examples:
41000
(1000 bytes in binary format to follow)
510000
(10000 bytes in binary format to follow)
The byte structure of one 5-byte step (there can be up to 4096
steps) of the Binary Data section is:
2 bytes:
Segment #
Using The Instrument 3-42
3 bytes:
Number of Repeats
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Publication No. 980867 Rev. A
3152A User Manual
The byte ordering of the Segment Number section is: High
byte, low byte. There is an offset between the Segment
Number above and the actual segment number.
The above structure ranges from 0 to 4095. The corresponding
segments are selected as ranging from 1 through 4096 with
the TRAC:SEL command.
The Repeat Number binary structure requires restructuring of
the byte order. The MSB of the 3 bytes is shifted around to the
beginning and the mid-byte and LSB (Least Significant Byte)
are shifted left by one byte.
Binary section (binary)
Header section (ASCII)
"#"
non-zero
ASCII digit
ASCII digit
Binary # of Repeats:
Binary Number
MSB shifted around to
0-4095 range
LSB position
Start of
Data Block
Number of Digits
to Follow in header
Byte Count: 5 x Number
of Sequence Steps
Segment Number for
this step: 2 bytes
Number of Repeats for
this step: 3 bytes
restructured as follows:
MSB
Mid
Byte
LSB
MSB
Figure 3-9, Sequenced Downloads
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3152A User Manual
Publication No. 980867 Rev. A
A simple example using the sequence command is to generate
a 1 step sequence with segment 1 repeated 74565 times:
SEQ:DATA#15<0000234501h>
where the 15 means:
1 specifies that one more byte will follow
5 specifies that 5 binary bytes will follow
and the <0000230145h>:
74565 is 00012345h rearranged to be 234501
Four zeros (0000) for segment 1 (segment 0)
Putting these together gives 0000234501
Triggered
Sequence Advance
Triggered Sequence Advance is a special case sequenced
mode. In Triggered Sequence Advance mode, the 3152A idles
between steps until a valid trigger signal is sensed. The trigger
source can be selected from a number of options:
•
An external trigger signal applied to the front panel
TRIG IN connector
•
An internal trigger
programmable
•
VXIbus TTLTRG<n> triggers
•
soft triggers.
generator
whose
period
is
A sequence operating in Continuous mode was seen in Figure
3-8. Figure 3-10 shows an example of the same sequence in
Triggered Sequence Advance mode.
Using The Instrument 3-44
Astronics Test Systems
Publication No. 980867 Rev. A
3152A User Manual
Figure 3-10, Sequenced Waveforms - Triggered Advance Mode
Triggered
Sequence
Advance
Commands
Placing the 3152A in Triggered Sequence Advance mode is
done in Triggered mode only. First, prepare the sequence of
waveforms using the commands that were explained before.
Second, place the instrument in Triggered mode using the
INIT:CONT OFF command. To place the 3152A in Triggered
Sequence Advance mode, use the following command:
SEQuence:ADVance {AUTO | TRIGger}
AUTO specifies the normal continuous advance and TRIGger
places the instrument in Triggered Sequence Advance mode.
The query:
SEQuence:ADVance?
queries Triggered Sequence Advance mode and returns AUTO
or TRIG.
Backplane InterModule
Synchronization
Astronics Test Systems
Although multiple 3152As within one chassis run off a common
clock (CLK10), their outputs are not synchronized to each other.
If the same waveform length and clock rates for two modules
are selected and both are displayed on an oscilloscope, the
outputs may look as though they are synchronized even though
they are not. The waveforms may not start at the same point
along the waveform. If another waveform is selected or if the
same waveforms are reprogrammed, you may notice that the
phase relationship between the two modules has changed
again.
Using The Instrument 3-45
3152A User Manual
Publication No. 980867 Rev. A
CAUTION:
Phase synchronization requires the use of the VXI
ECLTRG0 and ECLTRG1 signals. Other VXI instruments
must not drive ECLTRG0/1 while phase synchronization is
enabled.
There are phase synchronization commands that can tightly
control phase offsets between two or more 3152As. These
commands are described below. To use the following
commands, two 3152As are required. When synchronizing
modules, the waveforms in each module must have exactly the
same number of points.
First, load the waveforms in all the modules in preparation for
phase synchronization. Then select one 3152A as master and
program it using the following commands:
PHASe:LOCK ON
PHASe:SOURce MAST
The above 3152A is now programmed as master. Next,
program the other 3152A modules as slaves (SLAVe) and
program their phase offset in relation to the master. As an
example, program the second and third 3152A with 120 and
240 degree offsets, respectively.
Use the following commands on the second 3152A:
PHASe:SOURce SLAVe
PHASe:LOCK ON
PHASe:ADJust 120
Use the following commands on the third 3152A:
PHASe: SLAVe
PHASe:LOCK ON
PHASe:ADJust 240
The three 3152A modules are now synchronized.
The sample clock rate has no effect on phase offset accuracy.
However, when trying to synchronize modules that are
programmed to output waveforms with few memory points, a ±1
count error between modules may be seen. To remove this
error, use the following command:
PHASe:LOCK:NULL
Using The Instrument 3-46
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Publication No. 980867 Rev. A
3152A User Manual
CAUTION:
The PHASe:NULL command toggles between removing one
count and adding one count. Therefore, if there was no
error, sending this command may add a 1 count error.
The query:
PHASe:LOCK?
queries the Phase Lock mode and returns "0" (OFF) or "1"
(ON).
The query:
PHASe:ADJust?
queries the phase offset and returns a value in degrees.
In query:
PHASe:SOUR?
queries the phase lock source and returns MAST or SLAV.
Front-Panel Phase
Synchronization
The 3152A can phase lock to an external reference which is
applied to the trigger input. The locking process is done
automatically by the generator. There is no need for the user to
initiate or set the generator’s lock-in range for this mode. A
front-panel LED illuminates when the reference signal is valid
and the 3152A locks on the external signal. After lock has been
achieved, you may shift the phase between the reference and
the generator from -180o to +180o.
NOTE:
Phase offset resolution depends on the number of
waveform samples.
For instance, if you have 1000
waveform samples, there is no problem with adjusting the
phase offset in 1o increments (360o / 1000 < 1). As another
example, if you have only 10 waveform samples, the best
phase offset increments are only 36o (360o / 10 = 36o).
There is a special fine adjustment for phase offset with a 36o
range. This adjustment is useful in places where a 36o gap is
too wide. The fine phase adjustment improves phase offset
settings to 0.01o and can be used in conjunction with the coarse
phase offset adjustment at any phase offset setting point.
Astronics Test Systems
Using The Instrument 3-47
3152A User Manual
PLL Commands
Publication No. 980867 Rev. A
In PLL mode, the 3152A can be used as a slave only. Use the
following commands to program the 3152A to lock to an
external reference.
PLL:LOCK ON
This command places the 3152A in PLL mode. If no valid
reference signal is applied to the trigger input, the PLL ON LED
remains off. If you feel that the 3152A should lock and it does
not, check the following:
Make sure that trigger level is adjusted correctly
Make sure that the 3152A frequency setting permits lock in the
required range. Two graphs, one for fixed mode and the other
for user mode are given in Appendix A, showing the lock range
relationship between the reference and the internal frequency
settings.
PLL:ADJust <value>
applies a phase offset between the reference signal and the
main output. The default value is 0o. Phase offsets can be
adjusted between -180o and +180o. Best resolution for this
parameter is 1o, degrading to 36o at 10o point waveform
samples.
PLL:FINE <value>
applies a fine adjustment to the absolute setting of the PLL:ADJ
command. The default value is 0o. Fine phase adjustment is
usable between -36o and +36o.
As an example of the use of this command, we’ll take a 100
sample waveform. The best phase offset resolution for this
waveform is 3.6o (360o / 100 points). If you need to set an
offset of 50o, the 3152A will accept this value, but will not be
able to set this offset correctly. Since the resolution is 3.6o, the
output will offset by 50.4o. You can now correct the phase to
exactly 50o by using the PLL:FINE -0.4 command.
PLL:LOCK?
queries the PLL’s state. It returns a “0” (OFF) or “1” (ON).
PLL:ADJust?
queries the PLL offset. It returns a value in degrees.
PLL:FINE?
queries the PLL’s fine offset. It returns a value in degrees.
Using The Instrument 3-48
Astronics Test Systems
Publication No. 980867 Rev. A
Using the
Frequency
Counter
3152A User Manual
In PLL mode, the 3152A uses an autoranging counter circuit to
measure frequencies of reference signals at the trigger input.
This built-in counter is made available to you as long as the
signal at the trigger input is valid and the PLL ON LED
illuminates. Frequencies are measured from 500Hz to 10MHz
with 4 digit resolution.
To measure external frequencies you must first place the 3152A
in PLL mode. Use the following command:
PLL:LOCK ON
If no valid reference signal is applied to the trigger input, the
PLL ON LED remains off. If you feel that the 3152A should lock
and it does not, do the following:
Check that trigger level is adjusted correctly. You may change
trigger level settings using the TRIG:LEV command. The
default trigger level setting is 1.6 V.
Check that the 3152A frequency setting permits lock in the
required range. Two graphs, one for fixed mode and the other
for user mode are given in Appendix A, showing the lock range
relationship between the reference and the internal frequency
settings.
FREQuency:EXTernal?
queries the external frequency in Hz. 0.000e0 reading indicates
that no valid signal is available at the trigger input.
Using the Phase
Modulation Input
The phase modulation function operates in conjunction with the
front-panel PLL function. The PM Input accepts signals that
phase modulate the main output frequency after it has locked to
an external reference. Note that this input is active at all times
and unless you intend to use this function, do not connect any
cables to this input during normal operation of the 3152A.
When the 3152A is placed in PLL mode, the phase of the main
output signal may be shifted from the reference phase using the
phase modulation input. Although not very accurate, the phase
modulation input provides a way of phase offsetting the main
output above and below 360o.
The PM IN is sensitive to voltage levels. Applying 1 V to this
input generates a phase offset of 20o. Likewise, applying -1 V
to this input generates a phase offset of -20o. You may apply
20V to this input and generate a phase offset of 400o. The
applied frequency range is dc to 10KHz, depending on the lock
frequency and the number of waveform samples.
Astronics Test Systems
Using The Instrument 3-49
3152A User Manual
Amplitude
Modulation
Commands
Publication No. 980867 Rev. A
Arbitrary waveforms stored in memory segments are used as
modulating envelopes in Amplitude Modulation mode. The
modulated carrier is always a sine waveform with its frequency
set in points. The first step in modulating a waveform is to
generate an arbitrary waveform either from the standard
function library or by downloading a waveform from the
controller.
The command:
AM <value>
sets the internal modulation depth in percent. Select values
from 1% to 200%. The default setting for AM depth is 50%.
The query:
AM?
queries the modulation depth and returns a value in percent.
The command:
AM:INTernal:FREQuency <value>
sets the frequency of the carrier sine waveform. The frequency
of the carrier wave is programmed in points. Select from 10 to
500 points. The default setting for the carrier frequency is 100
points. The frequency of the carrier wave can be computed from
the sampling clock frequency divided by the number of points in
the active segment. Use the FREQ:RAST? command to
determine the current sampling clock frequency. The maximum
carrier frequency is the sampling clock frequency divided by 10
points. The envelope frequency should be less than the carrier
frequency.
The query:
AM:INTernal:FREQuency?
queries the carrier frequency and returns a value in points.
The command:
AM:EXECute
enables amplitude modulation. To ensure proper operation,
enable the amplitude modulation after setting up the other
modulation parameters. Amplitude modulation cannot be turned
on and off. Therefore, ensure that the original arbitrary
waveform is available in another memory segment as a backup.
Using The Instrument 3-50
Astronics Test Systems
Publication No. 980867 Rev. A
Using Sweep Mode
3152A User Manual
The key to using Sweep Mode efficiently is to place the 3152A
into a mode other than SWEep (FIX, USER or SEQ) while
sending the 3152A the sweep parameters. Once the
parameters are set, switch the 3152A to sweep mode using the
command:
FUNC:MODE SWEep
and the specified sweep waveform will be output. This is
because the 3152A relies on its sequencer and segmented
waveform memory to implement sweep.
WARNING:
Placing the 3152A in Sweep Mode overwrites any
waveforms, segments or sequences that are currently
stored in 3152A memory.
The other key to using Sweep Mode efficiently is to optimize the
number of sweep steps. Sweep steps are the number of
different discrete frequencies that the 3152A will output as it
completes a sweep cycle (start to stop frequency or stop to start
frequency). Set the number of sweep steps using the:
[:SOURce]:SWEep:STEP <integer_value>
command. Finding the optimal number of steps is a tradeoff
between speed of execution of the sweep command and
granularity of the sweep itself. This parameter can range from
10 to 2000 with a default value of 20.
The 3152A has a number of other sweep settings that should
also be set before entering sweep mode:
[:SOURce]:SWEep:DIRection < UP | DOWN>
The UP parameter causes a sweep from the start frequency to
the stop frequency. The DOWN parameter reverses this
direction.
[:SOURce]:SWEep:SPACing < LINear | LOGarithmic >
The LINear parameter causes the sweep function to dwell on
each discrete intermediate frequency for the same amount of
time at each frequency. The LOGarithmic parameter causes the
sweep function to dwell on each discrete frequency for differing
amounts of time according to the logarithmic function.
[:SOURce]:SWEep:FREQuency[:STARt] <value>
Astronics Test Systems
Using The Instrument 3-51
3152A User Manual
Publication No. 980867 Rev. A
This command specifies the frequency that the sweep function
starts with when SWE:DIR UP is enabled and ends with when
SWE:DIR DOWN is enabled.
[:SOURce]:SWEep:FREQuency:STOP <value>
This command specifies the frequency that the sweep function
ends with when SWE:DIR UP is enabled and starts with when
SWE:DIR DOWN is enabled.
[:SOURce]:SWEep:FREQuency:MARKer <value>
The 3152A’s sweep function can be synchronized with external
events using the marker facility. Choose a frequency between
the specified STARt and STOP as the location for the marker.
During each sweep cycle, the 3152A will output a marker pulse
in synchronization when the 3152A sweeps through the marker
frequency. The pulse will be available at the 3152A’s SYNC
OUT jack or output to a TTL trigger line as specified using the
OUTP:SYNC[:STATe]
and
OUTP:TTLTrg<N>[:STATe]
commands.
[:SOURce]:SWEep:FUNCtion < SIN | SQU | TRI >
This selects the shape of the waveform to be swept.
The sample clock frequency of the 3152A may be controlled
directly for the sweep function. Use the command:
[:SOURce]:SWEep:FREQuency:RASTer <value>
to accomplish this.
Finally, use the command:
[:SOURce]:SWEep:TIME <value>
to specify the duration of the sweep from start to end (or from
end to start if SWE:DIR DOWN is selected).
To terminate sweep mode, either reset the 3152A (*RST) or
select FUNC:MODE < FIX | USER | SEQ >.
Using The Instrument 3-52
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Publication No. 980867 Rev. A
System-Related
Commands
3152A User Manual
System-related commands are used to place the instrument in a
known state, clear the instrument to its defaults, or to query the
generator for its errors or identity. The following is an overview
of the system-related commands.
The query:
SYSTem:ERRor?
reads one error from the error queue. A record of up to 30
errors can be stored in the generator's error queue. Errors are
retrieved in first-in-first-out (FIFO) order. The first error returned
is the first error that was stored. When all errors have been read
from the queue, the generator returns +0, "No error".
If more than 30 errors have occurred, the last error stored in the
queue (the most current error) is replaced with -350,"Too many
errors". No additional errors are stored until all errors have been
removed from the queue. The error queue is cleared only when
power is cycled off or after the execution of a *CLS command.
The *RST command does not clear the error queue.
The query:
SYST:ERR
queries the system error queue and returns a string with the
following format: -102,"Syntax error". A complete list of errors
that can be detected by the generator is given in Chapter 4.
The query:
SYSTem:VERSion?
queries the generator to determine the present SCPI revision
and returns a string similar to "1993.0"
The query:
*IDN?
reads the generator's identification string. The generator returns
four fields separated by commas. The first field is the
manufacturer's name, the second field is the model number, the
third field is not used (always "0") and the fourth field is the
firmware version number. The command returns "Racal
Instruments,3152A,0,1.0". (Assuming the firmware revision is
"0")
Astronics Test Systems
Using The Instrument 3-53
3152A User Manual
Publication No. 980867 Rev. A
The commands:
RESet
*RST
reset the generator to its default state. The *RST and RES
commands have no effect on status registers, VXIbus states,
VXI address or SCPI command set.
The query:
*OPT?
queries the waveform memory length installed in the 3152A.
The response is “1" for 512K.
Using The Instrument 3-54
Astronics Test Systems
Publication No. 980867 Rev. A
3152A User Manual
Chapter 4
SCPI AND HS COMMAND REFERENCE
What’s In This
Chapter
This chapter contains reference information for programming the
3152A. Standard Commands For Programmable Instruments
(SCPI) convention rules and syntax are explained in detail.
Table 4-1 lists all SCPI commands used for programming the
3152A. The command summary for each SCPI model is also
included in this chapter.
This chapter teaches you how to use SCPI commands to control
functions, modes, waveforms and other aspects of the
instrument.
Prior understanding of SCPI programming is
necessary for low level programming of the 3152A.
In addition, High Speed (HS) commands have been defined
corresponding to each of the 3152A SCPI commands. These
commands can be used as alternatives to the SCPI command
set in cases where raw speed is more important than software
readability.
Introduction to
the SCPI
Language
Commands to program the instrument via the VXIbus are
defined by the Standard Commands for Programmable
Instruments (SCPI) 1993.0 standard. The SCPI standard defines
a common language protocol. It goes one step further than
IEEE-STD-488.2 and defines a standard set of commands to
control every programmable aspect of the instrument. It also
defines the formats of command parameters and the formats of
values returned by the instrument.
SCPI is an ASCII-based instrument command language
designed for test and measurement instruments. SCPI
commands are structured in a hierarchical a tree system. In this
system, associated commands are grouped together under a
common root, thus forming subsystems. Throughout this
manual, the following conventions are used for SCPI command
syntax.
Astronics Test Systems
SCPI and HS Command Reference 4-1
3152A User Manual
Publication No. 980867 Rev. A
Square Brackets ( [ ] )
Enclose optional
parameters
Braces ( { } )
Enclose parameters within a
command string
Triangle Brackets ( < > )
Substitute a value for the enclosed
parameter
Vertical Bar ( | )
Separate multiple parameter
choices
Bold Typeface Letters
Designate factory default values
keywords
or
Part of the OUTPut subsystem is shown below to illustrate the
tree system:
OUTPut
:FILTer
[:LPASs]
:FREQuency {20MHz|25MHz|50MHz}
[:STATe] OFF|ON
[:STATe] OFF|ON
OUTPut is the root keyword of the command; FILTer and STATe
are second level keywords. FREQuency and STATe are third
level keywords. A colon ( : ) separates a command keyword from
a lower level keyword.
Command Format
The format used to show commands in this manual is shown
below:
FREQuency {<frequency>|MINimum|MAXimum}
The command syntax shows most commands (and some
parameters) as a mixture of upper and lowercase letters. The
uppercase letters indicate the abbreviated spelling for the
command. For shorter program lines, send the abbreviated form.
For better program readability, send the long form.
For example, in the above syntax statement, FREQ and
FREQUENCY are both acceptable forms.
Use upper or
lowercase letters. Therefore, FREQ, FREQUENCY, freq, and
Freq are all acceptable. Other forms such as FRE and
FREQUEN will generate an error.
SCPI and HS Command Reference 4-2
Astronics Test Systems
Publication No. 980867 Rev. A
3152A User Manual
The above syntax statement shows the frequency parameter
enclosed in triangular brackets. The brackets are not sent with
the command string. A value for the frequency parameter (such
as "FREQ 50e+6”) must be specified.
Some parameters are enclosed in square brackets ([ ]). The
brackets indicate that the parameter is optional and can be
omitted. The brackets are not sent with the command string. If
an optional parameter is not specified, the synthesizer uses a
default value.
Command
Separator
A colon ( : ) is used to separate a command keyword from a
lower level keyword as shown below:
SOUR:FUNC:SHAP SIN
A semicolon ( ; ) is used to separate commands within the same
subsystem, and can also minimize typing. For example, sending
the following command string:
TRIG:SOUR:ADV INT;BURS ON;INT:RATE 5e-3
is the same as sending the following three commands:
TRIG:SOUR:ADV INT
TRIG:BURS ON
TRIG:INT:RATE 5e-3
Use the colon and semicolon to link commands from different
subsystems. For example, in the following command string, an
error is generated if both the colon and the semicolon are not
used.
OUTP:STATE ON;:TRIG:STAT ON
The MIN and MAX
Parameters
Substitute MINimum or MAXimum in place of a parameter for
some commands. For example, consider the following
command:
FREQuency {<frequency>|MINimum|MAXimum}
Instead of selecting a specific frequency, substitute MIN to set
the frequency to its minimum value or MAX to set the frequency
to its maximum value.
Astronics Test Systems
SCPI and HS Command Reference 4-3
3152A User Manual
Querying
Parameter Setting
Publication No. 980867 Rev. A
Query the current value of most parameters by adding a
question mark ( ? ) to the command. For example, the following
command sets the output function to square:
SOUR:FUNC:SHAP SQR
Query the output function by executing:
SOUR:FUNC:SHAP?
Query Response
Format
The response to a query depends on the command sent to the
instrument to generate the query response. In general, a
response to a query contains current values or settings of the
synthesizer. Commands that set values can be queried about
their current value of the setting. Commands that set modes of
operation can be queried about their current mode setting. IEEESTD-488.2 common queries generate responses which are
common to all instruments that are connected to the GPIB
interface.
SCPI Command
Terminator
A command string sent to the function generator must terminate
with a <new line> character. The IEEE-STD-488 EOI (end-oridentify) message is interpreted as a <new line> character. A
<carriage return> followed by a <new line> is also accepted.
Command string termination always resets the current SCPI
command path to the root level.
IEEE-STD-488.2
Common
Commands
The IEEE-STD-488.2 standard defines a set of common
commands that perform functions like reset, trigger and status
operations. Common commands begin with an asterisk ( * ), are
four to five characters in length, and may include one or more
parameters. The command keyword is separated from the first
parameter by a blank space. Use a semicolon ( ; ) to separate
multiple commands as shown below:
*RST; *STB?; *IDN?
SCPI Parameter
Types
The SCPI language defines several different data formats to be
used in program messages and response messages.
SCPI and HS Command Reference 4-4
Astronics Test Systems
Publication No. 980867 Rev. A
Numeric
Parameters
3152A User Manual
Commands that require numeric parameters will accept all
commonly used decimal representations of numbers including
optional signs, decimal points, and scientific notation. Special
values for numeric parameters like MINimum and MAXimum are
also accepted.
Engineering unit suffixes with numeric parameters (e.g., MHz or
kHz) can also be sent. If only specific numeric values are
accepted, the function generator will ignore values which are not
accepted and will generate an error message. The following
command is an example of a command that uses a numeric
parameter:
VOLT:AMPL <amplitude>
Discrete
Parameters
Discrete parameters are used to program settings that have a
limited number of values (i.e., FIXed, USER and SEQuence).
They have short and long form command keywords. Upper and
lowercase letters can be mixed. Query responses always return
the short form in all uppercase letters. The following command
uses discrete parameters:
SOUR:FUNC:MODE {FIXed | USER | SEQuence}
Boolean
Parameters
Boolean parameters represent a single binary condition that is
either true or false. The synthesizer accepts "OFF" or "0" for a
false condition. The synthesizer accepts "ON" or "1" for a true
condition. The instrument always returns "0" or "1" when a
boolean setting is queried. The following command uses a
boolean parameter:
OUTP:FILT { OFF | ON }
The same command can also be written as follows:
OUTP:FILT { 0 | 1 }
Arbitrary Block
Parameters
Arbitrary block parameters are used for loading waveforms into
the synthesizer's memory. Depending on which option is
installed, the 3152A can accept binary blocks up to 523288
bytes.
The following command uses an arbitrary block
parameter that is loaded as binary data:
TRAC:DATA#564000<binary_block>
Astronics Test Systems
SCPI and HS Command Reference 4-5
3152A User Manual
Alternative
Command Set
(HS Commands)
Publication No. 980867 Rev. A
In addition to the SCPI command set, there is an alternative
command set which may be invoked to increase the throughput
of the 3152A by a typical factor of 2-3. Actual throughput
improvements depend on the test program itself. Speed
increases are obtained by using a system of numerical
commands which completely bypass the SCPI parser and are
sent directly to the “jump table.”
HS commands correspond exactly with SCPI commands. A
number is substituted for the SCPI command name and a
number is substituted for any text type (discrete and boolean)
SCPI parameter(s). Spaces between the command and its
parameters are removed. For example, the command to close
the output relay of the 3152A is:
OUTP ON
HS command syntax for the same command is:
0200A1
where 0200A is the OUTP command and 1 indicates ON.
Special rules for using HS commands are described in the next
section. Table 4-1 provides a complete cross-reference listing of
all HS commands and their SCPI counterparts.
Invoking HS
Command Mode
The first step in the process of using the HS command set is to
place the instrument in FAST mode. Do this using the following
SCPI command:
INSTrument:MODE FAST
To terminate FAST mode to and resume the usage of standard
SCPI commands, use the following HS command:
0150A0
Note that 015A0 is the only HS command without a
corresponding SCPI command. The implied SCPI command
would be INSTrument:MODE NORMal, but this command does
not exist because it can only have an effect when the instrument
is in HS mode. Likewise, there is no HS command that
corresponds to the command INSTrument:MODE FAST.
In HS mode, the instrument accepts HS commands only. SCPI
commands sent when the 3152A is in HS mode will generate
errors.
Likewise, in NORMal (SCPI) mode, HS commands will not be
accepted.
SCPI and HS Command Reference 4-6
Astronics Test Systems
Publication No. 980867 Rev. A
Rules for Using
HS Command
Mode
3152A User Manual
HS commands must be sent to the instrument in accordance
with the following usage rules:
1.
Unlike SCPI command syntax, a space (or spaces) may not
be placed between HS commands and their parameters. For
example, the HS command
0100A1
is valid. The HS command
0100A 1
is incorrect and will generate an error.
2.
If more than 1 parameter is associated with a command, use
a comma (or commas) to separate parameters. Once again,
commas and parameters may not be offset by spaces. For
example, the HS command:
0300C1e6,5,0
is valid. The HS command:
0300C 1e6, 5, 0
is incorrect and will generate an error.
3.
As with SCPI, multiple HS commands may be sent together
if they are separated a semicolon (or semicolons). Once
again:
0100A1;0200A1
is valid and
0100A1; 0200A1
is incorrect and will generate an error.
4.
As with SCPI, “set” type HS commands may be terminated
with a question mark (?) instead of parameters to query or
“get” a setting from the instrument. For example, you can
query the frequency, amplitude and offset settings of the
3152A by sending the query:
0300C?
5.
Astronics Test Systems
At the end of an HS command string, terminate the string
with the \a character (0xA).
SCPI and HS Command Reference 4-7
3152A User Manual
SCPI and HS
Command
Summary
Publication No. 980867 Rev. A
Table 4-1 summarizes the complete SCPI command tree along
with the alternative HS command set available for programming
of the synthesizer. Refer to earlier sections in this manual for
more complete details on each command. Default HS command
parameters are indicated in bold where applicable.
SCPI and HS Command Reference 4-8
Astronics Test Systems
Publication No. 980867 Rev. A
3152A User Manual
Table 4-1, VXIbus 3152A SCPI Command Summary
Keyword
Parameter Format
(Default,min,max)
:FORMat
SCPI
1993.0
HS Commands
bincmd<param(s)>
Confirmed
:BORDer
NORMal | SWAPped
Confirmed
0100A<0|1>
:WAVE
NORMal | USER
Not
confirmed
0101A<0|1>
:INSTrument
Confirmed
NORMal | FAST
:MODE
Not
confirmed
0150A<0|1>
OFF | ON
Confirmed
0200A<1|0>
[:STATe]
OFF | ON
Confirmed
0200A<1|0>
:SHUNt
OFF | ON
Confirmed
0250A<0|1>
:OUTPut
:FILTer
Confirmed
[:LPASs]
Confirmed
20MHz | 25MHz | 50MHz
Confirmed
0201A<1|2|3>
[:STATe]
OFF | ON
Confirmed
0202A<0|1>
:ECLTrg<n>
OFF | ON
Confirmed
0210B<0|1>
[:STATe]
OFF | ON
Confirmed
0210B<0|1>
:FREQuency
:TRIGger
:SOURce
Not
confirmed
BIT | LCOMplete | INTernal | EXTernal
Not
confirmed
0220A<1|2|3|4>
(0;0;7)
Confirmed
0230B<0|1|2|3|4|5|6|7,0|1>
OFF | ON
Confirmed
0230B<0|1|2|3|4|5|6|7,0|1>
:TTLTrg<n>
[:STATe]
:SYNC
Not
confirmed
:SOURce
BIT | LCOMplete | SSYNc | HCLock
Not
confirmed
0240A<1|2|3|4>
[:STATe]
OFF | ON
Not
confirmed
0241A<0|1>
:POSition
(N-6;2;523288) (even #)
Not
Confirmed
0242A<long>
(N-6;2;523288) (even #)
Not
Confirmed
0242A<long>
(2;500;2)
Not
Confirmed
0243A<integer>
[:POINt]
:WIDTh
[:SOURce]
Confirmed
:APPLy
FREQ,AMPL,OFFS
Not
confirmed
0300C<float,float,float>
:SINusoid
FREQ,AMPL,OFFS,PHAS,POW
Not
confirmed
0301E<float,float,float,float,integer
>
:TRIangle
FREQ,AMPL,OFFS,PHAS,POW
Not
confirmed
0302E<float,float,float,float,integer
>
:SQUare
FREQ,AMPL,OFFS,DCYC
Not
confirmed
0303D<float,float,float,float>
Astronics Test Systems
SCPI and HS Command Reference 4-9
3152A User Manual
Keyword
Publication No. 980867 Rev. A
Parameter Format
(Default,min,max)
SCPI
1993.0
HS Commands
bincmd<param(s)>
:RAMP
FREQ,AMPL,OFFS,DEL,WIDT,LEAD,TR
A
FREQ,AMPL,OFFS,DEL,LEAD,TRA
:SINC
FREQ,AMPL,OFFS,NCYC
0304G<float,float,float,float,float,fl
oat, float>
0305F<float,float,float,float,float,fl
oat>
0310D<float,float,float,integer>
:GAUSsian
FREQ,AMPL,OFFS,EXP
:EXPonential
FREQ,AMPL,OFFS,EXP
:DC
DC_AMPL
:USER
SEG<n>,SCLK,AMPL,OFFS
Not
confirmed
Not
confirmed
Not
confirmed
Not
confirmed
Not
confirmed
Not
confirmed
Not
confirmed
Confirmed
Confirmed
0400A<float>
Not
confirmed
Not
Confirmed
Not
confirmed
Confirmed
Confirmed
Confirmed
Confirmed
0410A<float>
Confirmed
Confirmed
Confirmed
Confirmed
0501A<float>
:PULSe
:FREQuency
[:CW]
:RASTer
:SOURce
(1E6;100E-6;50E6) | MINimum |
MAXimum
(1E6;100E-6;50E6) | MINimum |
MAXimum
(1E6;100E-3;100E6) | MINimum |
MAXimum
INT | EXT | ECLtrg0
:EXTernal?
:VOLTage
[:LEVel]
[:IMMediate]
(5.000;10E-3;16.00)
(5.000;10E-3;16.00)
[:AMPLitude]
:OFFSet
:FUNCtion
:MODE
:SHAPe
(0;-7.190;+7.190)
FIXed | USER | SEQuence |SWEep
SIN | TRI | SQU | PULS | RAMP | SINC |
GAUS | EXP | DC
:SINusoid
:PHASe
(0;0;360)
:POWer
(1;1;9)
:TRIangle
:PHASe
(0;0;360)
:POWer
(1;1;9)
:SQUare
:DCYCle
(50;1;99.9)
:PULSe
SCPI and HS Command Reference 4-10
Not
Confirmed
Not
Confirmed
Not
Confirmed
Not
Confirmed
Not
Confirmed
Not
Confirmed
Not
Confirmed
Not
Confirmed
Confirmed
0306D<float,float,float,integer>
0307D<float,float,float,integer>
0308A<float>
0309D<integer,float,float,float>
0400A<float>
0411A 3|4|16
[email protected]?
0500A<float>
0500A<float>
0610A<0|1|2|3>
0600A<0|1|2|3|4|5|6|7|8|9>
0700A<float>
0701A<integer>
0710A<float>
0711A<integer>
0720A<float>
Astronics Test Systems
Publication No. 980867 Rev. A
Keyword
3152A User Manual
Parameter Format
(Default,min,max)
SCPI
1993.0
HS Commands
bincmd<param(s)>
:DELay
(10;0;99.9)
Confirmed
0730A<float>
:WIDTh
(10;0;99.9)
Confirmed
0731A<float>
(10;0;99.9)
Confirmed
0732A<float>
[:LEADing]
(10;0;99.9)
Confirmed
0732A<float>
:TRAiling
(10;0;99.9)
Confirmed
0733A<float>
:TRANsition
:RAMP
Not
Confirmed
:DELay
(10;0;99.9)
Not
Confirmed
0740A<float>
:TRANsition
(10;0;99.9)
Not
Confirmed
0741A<float>
[:LEADing]
(10;0;99.9)
Not
Confirmed
0741A<float>
:TRAiling
(10;0;99.9)
Not
Confirmed
0742A<float>
:SINC
:NCYCle
Not
Confirmed
(10;4;100)
:GAUSsian
:EXPonent
:DC
(10;1;200)
Not
Confirmed
0760A<float>
(100;-100;100)
Not
Confirmed
0770A<float>
Not
Confirmed
Not
Confirmed
(100;-100;100)
Not
Confirmed
0770A<float>
(50;1;200)
Confirmed
0780A<integer>
(50;1;200)
Confirmed
0780A<integer>
[:AMPLitude]
:INTernal
:FREQuency
0750A<float>
(-10;-200;200)
[:IMMediate]
[:DEPTh]
Not
Confirmed
Not
Confirmed
[:VOLTage]
:AM
0790A<integer>
Not
Confirmed
:EXPonential
:EXPonent
Not
Confirmed
Confirmed
(100;10;500)
:EXECute
:PHASe
Confirmed
0781A<integer>
Not
confirmed
07820
Confirmed
:LOCK
OFF | ON
Not
confirmed
0820A<0|1>
[:STATe]
OFF | ON
Not
confirmed
0820A<0|1>
Astronics Test Systems
SCPI and HS Command Reference 4-11
3152A User Manual
Keyword
Publication No. 980867 Rev. A
Parameter Format
(Default,min,max)
:NULL
SCPI
1993.0
HS Commands
bincmd<param(s)>
Not
confirmed
08500
:ADJust
(0;0;360)
Confirmed
0810A<float>
:SOURCe
MASTer | SLAVe
Confirmed
0800<1|2>
:PLL
Confirmed
:LOCK
OFF | ON
Not
confirmed
0920A<0|1>
[:STATe]
OFF | ON
Not
confirmed
0920A<0|1>
:ADJust
(0;-180;+180)
Confirmed
0900A<float>
:FINE
(0;-36;+36)
Not
Confirmed
0910A<float>
:SEQuence
Not
Confirmed
:ADVance
AUTOmatic | TRIGgered
Not
Confirmed
1300A<0|1>
:DATA
#string
Not
Confirmed
13401#<string>
:DEFine
(1;1;4096),(1;1;4096),(1;1;1E6)
Not
Confirmed
13103<integer,integer,long>
Not
Confirmed
13201
Not
Confirmed
13201
Not
Confirmed
13210
:DELete
[:NAME]
(1;1;4096)
:ALL
:SWEep
Confirmed
:TIME
Confirmed
1600A<float>
Confirmed
1601A<0|1>
:DIRection
UP | DOWN
:SPACing
LINEar | LOGarithmic
:STEP
Confirmed
1602A<0|1>
Confirmed
1603A
Confirmed
1604A<0|1|2>
:FREQuency
Confirmed
1610A<float>
[:STARt]
Confirmed
1610A <float>
:FUNCtion
SINusoidal | TRIangle | SQUare
:STOP
Confirmed
1611A<float>
:RASTer
Confirmed
1612A<float>
:MARKer
Confirmed
1613A<float>
Confirmed
14200
:RESet
:SYSTem
Confirmed
:ERRor?
Confirmed
[email protected]?
:VERSion?
Confirmed
[email protected]?
SCPI and HS Command Reference 4-12
Astronics Test Systems
Publication No. 980867 Rev. A
Keyword
3152A User Manual
Parameter Format
(Default,min,max)
:TRACe
[:DATA]
SCPI
1993.0
HS Commands
bincmd<param(s)>
Confirmed
10001#<string>
Confirmed
10001#<string>
:DEFine
(1;1;4096),(10;10;523288) (even #)
Confirmed
10102<integer,long>
:DELete
(1;1;4096)
Confirmed
09201<integer>
(1;1;4096)
Confirmed
09201<integer>
[:NAME]
:ALL
(1;1;4096)
:SELect
Confirmed
10210
Confirmed
1030A<integer>
:SEGMent
Not
Confirmed
:DATA
Not
Confirmed
:INITiate
Confirmed
OFF | ON
:CONTinuous
:TRIGger
Confirmed
10501#<string>
1110A<0|1>
Confirmed
OFF | ON
Not
Confirmed
1120A<0|1>
OFF | ON
Not
Confirmed
1120A<0|1>
:COUNt
(1;1;1E6)
Confirmed
1121A<long>
:DELay
(0;10;2E6) (even #, 0 or ≥10)
Confirmed
1131A<long>
:LEVel
(0;-10.00;+10.00)
Confirmed
1180A<float>
:BURSt
[:STATe]
:SOURce
Not
Confirmed
EXTernal | INTernal | TTLTrg<n>
Not
Confirmed
1140A<4|3|8|9|10|11|12|13|14|15>
Not
Confirmed
1150A<0|1>
OFF | ON | 0 | 1
Not
Confirmed
1150A<0|1>
:SLOPe
POSitive | NEGative
Confirmed
1160A<0|1>
:TIMer
(100e-6;15e-6;1000)
Confirmed
1170A<float>
Confirmed
11000
Not
Confirmed
1210A<0|1>
:ADVance
:GATE
[:STATe]
[:IMMediate]
:SMEMory
:MODE
READ | WRITe
Not
Confirmed
1200A<0|1>
[:STATe]
OFF | ON
Not
Confirmed
1210A<0|1>
Confirmed
[email protected]?
[:ALL]?
Confirmed
[email protected]?
*CLS
Confirmed
15000
:TEST
Astronics Test Systems
SCPI and HS Command Reference 4-13
3152A User Manual
Publication No. 980867 Rev. A
Keyword
Parameter Format
(Default,min,max)
*ESE
(0;0;255)
SCPI
1993.0
HS Commands
bincmd<param(s)>
Confirmed
1501A<integer>
*OPC
Confirmed
15020
*RST
Confirmed
14200
*TRG
Confirmed
11000
*ESE?
Confirmed
[email protected]?
*ESR?
Confirmed
[email protected]?
*IDN?
Confirmed
[email protected]?
*OPC?
Confirmed
[email protected]?
*SRE?
Confirmed
[email protected]?
*STB?
Confirmed
[email protected]?
*TST?
Confirmed
[email protected]?
Output
Configuration
Command
Summary
Output Configuration commands control the output function,
shape, frequency, amplitude, filter and state. Optional modes
are omitted from these commands. Factory defaults after *RST
are shown in bold typeface. Parameter low and high limits are
given where applicable. Use the Standard Waveform parameters
as described in Using The APPLy Command.
Commands and Parameters
(Low Limit,High Limit,Default)
[SOURce:]
APPLy:SINusoid {<frequency>,[<amplitude>,[<offset>,[<phase>,[<power>]]]]}
APPLy:TRIangle {<frequency>,[<amplitude>,[<offset>,[<phase>,[<power>]]]]}
APPLy:SQUare {<frequency>,[<amplitude>,[<offset>,[<duty_cycle>]]]}
APPLy:PULSe {<frequency>,[<amplitude>,[<offset>,[<delay>,[<high_time>
,[<rise_time>,[<fall_time>]]]]]]}
APPLy:RAMP {<frequency>,[<amplitude>,[<offset>,[<delay>,[<rise_time>
<fall_time>]]]]]}
APPLy:SINC {<frequency>,[<amplitude>,[<offset>,[<number_cycles>]]]}
APPLy:EXPonential {<frequency>,[<amplitude>,[<offset>,[<exponent>]]]}
APPLy:GAUSsian {<frequency>,[<amplitude>,[<offset>,[<exponent>]]]}
APPLy:DC {<percent_amplitude>}
APPLy:USER {<segment_number>,[<sampling_clock>,[<amplitude>, [<offset>]]]}
SCPI and HS Command Reference 4-14
Astronics Test Systems
Publication No. 980867 Rev. A
3152A User Manual
Commands and Parameters
(Low Limit,High Limit,Default)
APPLy:<function_shape>?
APPLy?
FUNCTion:MODE {FIXed | USER | SEQuence | SWEep}
(FIX)
FUNCTion:MODE?
FUNCtion:SHAPe {SINusoid | TRIangle | SQUare | PULSe | RAMP | SINC
EXPonential | GAUSsian | DC }
(SIN)
FUNCtion:SHAPe?
FREQuency {<frequency> | MINimum | MAXimum}
(100E-6,50E6,1E6)
FREQuency?
FREQuency:RASTer {<frequency> | MINimum | MAXimum}
(100E-3,100E6,1E6)
FREQuency:RASTer?
FREQuency:RASter:SOURce {EXT | INT | ECLtrg0}
(INT)
FREQuency:RASTer:SOURce?
FREQuency:EXTernal?
VOLTage {<amplitude>| MINimum | MAXimum}
(10.0E-3,16.0,5.00)
VOLTage?
VOLTage:OFFSet <offset>
(-7.19,7.19,0)
VOLTage:OFFSet?
OUTPut:
FILTer:FREQuency {20MHz | 25MHz | 50MHz}
20MHz
FILTer:FREQuency?
FILTer {OFF | ON}
OFF
FILTer?
[STATe] {OFF | ON}
OFF
[STATe] SOURce?
SYNC:SOURce {BIT | LCOMplete | SSYNc | HCLock}
Astronics Test Systems
BIT
SCPI and HS Command Reference 4-15
3152A User Manual
Publication No. 980867 Rev. A
SYNC:POSition <value>
(0,512K,n-6)
SYNC:SOURce?
SYNC[:STATe] {OFF | ON}
OFF
SYNC[:STATe]?
ECLTrg<n>{OFF | ON}
OFF
TTLTrg<n>{OFF | ON}
OFF
TRIGger:SOURce {BIT | LCOMplete | INTernal | External}
BIT
Standard
Waveform
Command
Summary
The Standard Waveform Commands control the various
parameters of the standard output functions. Optional modes
are omitted from these commands. Factory defaults after *RST
are shown in bold typeface. Parameter low and high limits are
given where applicable. The Standard Waveforms parameters
could be used for the APPLy command.
Command and Parameters
Low Limit
High Limit
Default
0
360
0
1
9
1
0
360
0
1
9
1
1
99
50
0
99.9
10.0
0
99.9
10.0
0
99.9
10.0
[SOURce:]
SINusoid:PHASe <value>
SINusoid:PHASe?
SINusoid:POWer <value>
SINusoid:POWer?
TRIangle:PHASe <value>
TRIangle:PHASe?
TRIangle:POWer <value>
TRIangle:POWer?
SQUare:DCYCle <value>
SQUare:DCYCle?
PULSe:DELay <value>
PULSe:DELay?
PULSe:WIDTh <value>
PULSe:WIDTh?
PULSe:TRANsition <value>
SCPI and HS Command Reference 4-16
Astronics Test Systems
Publication No. 980867 Rev. A
3152A User Manual
PULSe:TRANsition?
PULSe:TRANsition:TRAiling <value>
0
99.9
10.0
0
99.9
10.0
0
99.9
10.0
0
99.9
10.0
4
100
10
1
200
10
-200
200
-10
-100
100
100
PULSe:TRANsition:TRAiling?
RAMP:DELay <value>
RAMP:DELay?
RAMP:TRANsition <value>
RAMP:TRANsition?
RAMP:TRANsition:TRAiling <value>
RAMP:TRANsition:TRAiling?
SINC:NCYCle <value>
SINC:NCYCle?
GAUSsian:EXPonent <value>
GAUSsian:EXPonent?
EXPonential:EXPonent <value>
EXPonential:EXPonent?
DC <%_amplitude>
DC?
Arbitrary
Waveform,
Sequence, and
Shared Memory
Command
Summary
Arbitrary Waveform commands allow the definition of segments
and their corresponding lengths, addition and deletion of
segments, and the loading waveform data. Sequence
commands control which segments are linked and the number of
times each segment is repeated.
The shared memory
commands place the 3152A in a special data transfer mode
where the 3152A's message-based interface is bypassed and
data is loaded directly from the VXIbus. Optional modes are
omitted from these commands. Defaults are shown in bold.
Command and Parameters
TRACe #<binary_block>
TRACe:DEFine {<segment_number>, <length>}
TRACe:DELete <segment_number>
TRACe:DELete:ALL
TRACe:SELect <segment_number>
Astronics Test Systems
SCPI and HS Command Reference 4-17
3152A User Manual
Publication No. 980867 Rev. A
FORMat:BORDer {NORMal | SWAPped}
FORMat:BORDer?
SEQuence:DEFine <step_number>, <segment_number>, <#_repeats>
SEQuence:DATA #<data>
SEQuence:DELete <sequence_number>
SEQuence:DELete:ALL
SEQuence:SELect <sequence_number>
SEGMent:DATA #<data>
SMEMory:MODE {READ | WRITe}
SMEMory {OFF | ON}
Modulation
Command
Summary
The Modulation Commands controls amplitude modulation
parameters. Optional modes are omitted from these commands.
Factory defaults after *RST are shown in bold typeface.
Parameter low and high limits are given where applicable.
Command and Parameters
Low Limit
High Limit
Default
0
200
50
10
500
100
[SOURce:]
AM <value>
AM?
AM:INTernal:FREQuency <value>
AM:INTernal:FREQuency?
AM:EXECute
SCPI and HS Command Reference 4-18
Astronics Test Systems
Publication No. 980867 Rev. A
Trigger Command
Summary
3152A User Manual
The Trigger commands control the trigger modes of the 3152A.
The 3152A can be placed in Triggered, Gated or Burst mode.
Trigger source is selectable from an external source, internal
trigger generator, backplane TTLTrg 0-7, and software trigger.
Optional modes are omitted from these commands. Factory
defaults after *RST are shown in bold typeface. Parameter low
and high limits are given where applicable.
Command and Parameters
Low Limit
High Limit
Default
INITiate:CONTinuous {OFF | ON}
ON
TRIGger:BURSt {OFF | ON}
OFF
TRIGger:COUNt <value>
1
1e6
1
TRIGger:DELay <value>
0/10
2e6
0
TRIGger:DELay:STATe {OFF | ON}
OFF
TRIGger:GATE {OFF | ON}
OFF
TRIGger:LEVel <value>
-10
10
1.6
TRIGger:SLOPe {POSitive | NEGative}
POS
TRIGger:SOURce:ADVance {EXTernal | INTernal | TTLTrg<n>}
EXT
TRIGger:TIMer: <value>
15e-6
1000
100e-6
TRIGger:IMMediate
*TRG
Backplane InterModule Phase
Synchronization
Command
Summary
Astronics Test Systems
Phase Synchronization commands control the phase offset
between two or more modules. There is no limit on how many
modules can be synchronized, as long as one module is
programmed to be master and the rest of the modules are
slaves. The location of the slave modules in relation to the
master module does not affect the accuracy of the phase offset.
The commands are presented exactly as they should be typed in
your program. Optional nodes were omitted from these
commands. Factory defaults after *RST or front panel reset are
shown in bold typeface. Parameter low and high limits are given
where applicable.
SCPI and HS Command Reference 4-19
3152A User Manual
Publication No. 980867 Rev. A
Command and Parameters
Low Limit
High Limit
PHASe:LOCK {OFF | ON}
Default
OFF
PHASe:ADJust <value>
0
360 (*)
PHASe:SOURce {MASTer | SLAVe}
0
SLAV
PHASe:NULL
(*) High phase offset limit is not always 360o. It depends on
the number of points that were assigned to the active memory
segment. Phase offset limits are specified in Appendix A.
Front-Panel PLL
Command
Summary
Front-panel PLL commands control the PLL mode and the
phase offsets with respect to an external reference. If the
3152A is placed in PLL mode, it can be used as a slave only.
After lock, the synthesizer’s output frequency is exactly equal
to the frequency of the reference signal.
The commands are presented exactly as they should be typed
in your program. Optional nodes were omitted from these
commands. Factory defaults after *RST or front panel reset are
shown in bold typeface. Parameter low and high limits are
given where applicable.
Command and Parameters
Limit
Low
High
Default
Limit
PLL:LOCK {OFF | ON}
PLL:ADJust <value>
PLL:FINE <value>
OFF
-180
-36.00
180
0
36.00
0
The PLL:FINE adjustment is always relative to the PLL:ADJ
setting.
For instance, programming PLL:ADJ 120 and
PLL:FINE –1.55 will generate a phase offset of 118.45
degrees. Note that the PLL lock range depends on the
number of waveform samples, sampling frequency and
external reference frequency. The relationship between these
parameters is show in Appendix A.
SCPI and HS Command Reference 4-20
Astronics Test Systems
Publication No. 980867 Rev. A
System-Related
Command
Summary
3152A User Manual
The system-related commands are not related directly to
waveform generation but are an important part of operating the
3152A. These commands can reset or test the instrument, or
query the instrument for system information.
Command and Parameters
SYSTem:ERRor?
SYSTem:VERSion?
RESet
*RST
TEST?
*TST?
*IDN?
*OPT?
IEEE-STD-488.2
Common
Commands and
Queries
Since most instruments and devices in an ATE system use
similar commands which perform similar functions, the IEEESTD-488.2 document has specified a common set of
commands and queries which all compatible devices must use.
This avoids situations where devices from various
manufacturers use different sets of commands to enable
functions and report status. The IEEE-STD-488.2 treats
common commands and queries as device dependent
commands. For example, *TRG is sent over the bus to trigger
the instrument. Some common commands and queries are
optional, but most of them are mandatory.
The following is a complete listing of all common commands
and queries which are used in the 3152A.
*CLS - Clear the Status Byte summary register and all event
registers.
*ESE <enable_value> - Enable bits in the Standard Event
enable register. The selected bits are then reported to the
status byte.
*ESE? - Query the Standard Event enable register. The
synthesizer returns a decimal value which corresponds to the
binary-weighted sum of all bits set in the register.
*ESR? - Query the Standard Event register. The synthesizer
returns a decimal value which corresponds to the binaryweighted sum of all bits set in the register.
Astronics Test Systems
SCPI and HS Command Reference 4-21
3152A User Manual
Publication No. 980867 Rev. A
*IDN? - Query the synthesizer’s identity. The returned data is
organized into four fields, separated by commas. The
synthesizer responds with its manufacturer and model number
in the first two fields, and may also report its serial number and
options in fields three and four. If the latter information is not
available, the device must return an ASCII 0 for each. For
example, 3152A’s response to *IDN? is:
RACAL INSTRUMENTS,3152A,0,x.x.
Where x.x is the current firmware revision
*OPC - Set the "operation complete" bit (bit 0) in the Standard
Event register after the previous commands have been
executed.
*OPC? - Returns "1" to the output buffer after all the previous
commands have been executed. *OPC? is used for
synchronization between a controller and the instrument using
the MAV bit in the Status Byte or a read of the Output Queue.
The *OPC? query does not affect the OPC Event bit in the
Standard Event Status Register (ESR). Reading the response
to the *OPC? query has the advantage of removing the
complication of dealing with service requests and multiple polls
to the instrument. However, both the system bus and the
controller handshake are in a temporary hold-off state while
the controller is waiting to read the *OPC? query response.
*OPT? - Returns “1” if the Model has 512k of memory
installed.
*RST - Resets the synthesizer to its default state. Default
values are listed in Table 4-1.
*SRE <enable_value> - Enables bits in the Status Byte enable
register.
*SRE? - Query the Status Byte enable register. The
synthesizer returns a decimal value in the range of 0 to 63 or
128 to 191 since bit 6 (RSQ) cannot be set. The binaryweighted sum of the number represents the value of the bits of
the Service Request enable register.
*STB? - Query the Status Byte summary register. The *STB?
command is similar to a serial poll but is processed like any
other instrument command. The *STB? command returns the
same result as a serial poll, but the "request service" bit (bit 6)
is not cleared if a serial poll has occurred.
*TRG - Triggers the synthesizer from the remote interface. This
command effects the synthesizer if it is first placed in the
Trigger or Burst mode of operation and the trigger source is set
to "BUS".
SCPI and HS Command Reference 4-22
Astronics Test Systems
Publication No. 980867 Rev. A
3152A User Manual
*TST? - Implements an internal self-test and returns a value as
described below.
Approximately 90% of the 3152A
functionality is tested.
0-
Self-test passed
1-
DAC, DAC control, output amplifier or amplitude control
failure.
2-
Offset amplifier or offset control failure
4-
CPU to peripheral communication failure
8-
Trigger circuit or internal trigger failure
16 -
Sequence or burst generator failure
32 -
Clock generator failure
More than one failure can be reported at one time. For
example, the returned value “17" indicates both a DAC/Output
Amplifier problem and a sequence/burst generator problem
exist.
*WAI - Wait for all pending operations to complete before
executing any additional commands over the interface.
The SCPI Status
Registers
The 3152A uses the Status Byte register group and the
Standard Event register group to record various instrument
conditions. Figure 4-1 shows the SCPI status system.
An Event Register is a read-only register that reports defined
conditions within the synthesizer. Bits in an event register are
latched. When an event bit is set, subsequent state changes
are ignored. Bits in an event register are automatically cleared
by a query of that register or by sending the *CLS command.
The *RST command or device clear does not clear bits in an
event register. Querying an event register returns a decimal
value that corresponds to the binary-weighted sum of all bits
set in the register.
An Event Register defines which bits in the corresponding
event register are logically ORed together to form a single
summary bit. The user can read from and write to an Enable
Register. Querying an Enable Register will not clear it. The
*CLS command does not clear Enable Registers but it does
clear bits in the event registers. To enable bits in an enable
register, write a decimal value that corresponds to the binaryweighted sum of the bits required to enable in the register.
Astronics Test Systems
SCPI and HS Command Reference 4-23
3
2
1
Operation Complete
Request Control
Query Error
5
4
Device Dependent Error
Execution Error
6
Publication No. 980867 Rev. A
Command Error
7
User Request
Power On
3152A User Manual
0
Standard
Event Status Register
*ESR?
Logical OR
&
&
7
6
&
5
&
4
&
&
3
2
&
1
Queue
&
0
Not-Empty
Standard Event
Status Register
*ESE <value>
*ESE?
Output Queue
read by Serial Port
RQS
Service
Request
Generation
7
6
ESBMAV
3
2
1
0
Status Byte Register
MSS
Logical OR
read by *STB?
&
7
&
6
5
&
4
&
3
&
2
&
1
&
0
Service Request
Enable Register
*SRE <value>
*SRE?
Figure 4-1, SCPI Status Registers
SCPI and HS Command Reference 4-2
Astronics Test Systems
Publication No. 980867 Rev. A
The Status Byte
Register (STB)
3152A User Manual
The Status Byte summary register contains conditions from the
other registers. Query data waiting in the synthesizer's output
buffer is immediately reported through the Message Available
bit (bit 4). Bits in the summary register are not latched. Clearing
an event register will clear the corresponding bits in the Status
Byte summary register. Description of the various bits within the
Status Byte summary register is given in the following:
Bit 0 - Decimal value 1. Not used, always set to 0.
Bit 1 - Decimal value 2. Not used, always set to 0.
Bit 2 - Decimal value 4. Not used, always set to 0.
Bit 3 - Decimal value 8. Not used, always set to 0.
Bit 4 - Decimal value 16. Message Available Queue Summary
Message (MAV). The state of this bit indicates whether or not
the output queue is empty. The MAV summary message is true
when the output queue is not empty. This message is used to
synchronize information exchange with the controller. The
controller can, for example, send a query command to the
device and then wait for MAV to become true. If an application
program begins a read operation of the output queue without
first checking for MAV, all system bus activity is held up until the
device responds.
Bit 5 - Decimal value 32. Standard Event Status Bit (ESB)
Summary Message. This bit indicates whether or not one or
more of the enabled ESB events have occurred since the last
reading or clearing of the Standard Event Status Register.
Bit 6 - Decimal value 64. Master Summary Status
(MSS)/Request Service (RQS) Bit. This bit indicates if the
device has at least one condition to request service. The MSS
bit is not part of the IEEE-STD-488.1 status byte and will not be
sent in response to a serial poll. However, the RQS bit, if set,
will be sent in response to a serial poll.
Bit 7 - Decimal value 128. Not used, always set to 0.
Reading the
Status Byte
Register
Astronics Test Systems
The Status Byte summary register can be read with the *STB?
common query. The *STB? common query causes the
synthesizer to send the contents of the Status Byte register and
the MSS (Master Summary Status) summary message as a
single <NR1 Numeric Response Message> element. The
response represents the sum of the binary-weighted values of
the Status Byte Register. The *STB? common query does not
alter the status byte.
SCPI and HS Command Reference 4-3
3152A User Manual
Publication No. 980867 Rev. A
Clearing the
Status Byte
Register
The entire Status Byte register can be cleared by removing the
reasons for service from Auxiliary Status registers. Sending the
*CLS command to the device after a SCPI command terminator
and before a Query clears the Standard Event Status Register
and clears the output queue of any unread messages. With the
output queue empty, the MAV summary message is set to
FALSE. Methods of clearing other auxiliary status registers are
discussed in the following paragraphs.
Service Request
Enable Register
(SRE)
The Service Request enable register is an 8-bit register that
enables corresponding summary messages in the Status Byte
Register. Thus, the application programmer can select reasons
for the synthesizer to issue a service request by altering the
contents of the Service Request Enable Register.
The Service Request Enable Register is read with the *SRE?
common query. The response to this query is a number that
represents the sum of the binary-weighted value of the Service
Request Enable Register. The value of the unused bit 6 is
always zero.
The Service Request Enable Register is written using the *SRE
command followed by a decimal value representing the bit
values of the Register. A bit value of 1 indicates an enabled
condition. Consequently, a bit value of zero indicates a disabled
condition. The Service Request Enable Register is cleared by
sending *SRE0. The synthesizer always ignores the value of bit
6. Summary of *SRE commands is given in the following.
*SRE0 - Clears all bits in the register.
*SRE1 - Not used.
*SRE2 - Not used.
*SRE4 - Not used.
*SRE8 - Not used.
*SRE16 - Service request on MAV.
*SRE32 - Service request on ESB summary bit.
*SRE128 - Not used.
SCPI and HS Command Reference 4-4
Astronics Test Systems
Publication No. 980867 Rev. A
Standard Event
Status Register
(ESR)
3152A User Manual
The Standard Event Status Register reports status for special
applications. The 8 bits of the ESR have been defined by the
IEEE-STD-488.2 as specific conditions which can be monitored
and reported back to the user upon request. The Standard
Event Status Register is destructively read with the *ESR?
common query. The Standard Event Status Register is cleared
with a *CLS common command, with a power-on and when
read by *ESR?.
The arrangement of the various bits within the register is firm
and is required by all GPIB instruments that implement the
IEEE-STD-488.2. Description of the various bits is given in the
following:
Bit 0 - Operation Complete. Generated in response to the *OPC
command. It indicates that the device has completed all
selected and pending operations and is ready for a new
command.
Bit 1 - Request Control. This bit operation is disabled on the
3152A.
Bit 2 - Query Error. This bit indicates that an attempt is being
made to read data from the output queue when no output is
either present or pending.
Bit 3 - Device Dependent Error. This bit is set when an error in
a device function occurs. For example, the following command
will cause a DDE error:
VOLTage 7.25;:VOLTage:OFFSet 4.1
Both of the above parameters are legal and within the specified
limits, however, the synthesizer is unable to generate such an
amplitude and offset combination.
Bit 4 - Execution Error. This bit is generated if the parameter
following the command is outside of the legal input range of the
synthesizer.
Bit 5 - Command Error. This bit indicates the synthesizer
received a command that was a syntax error or a command that
the device does not implement.
Bit 6 - User Request. This event bit indicates that one of a set
of local controls had been activated. This event bit occurs
regardless of the remote or local state of the device.
Bit 7 - Power On. This bit indicates that the device's power
source was cycled since the last time the register was read.
Astronics Test Systems
SCPI and HS Command Reference 4-5
3152A User Manual
Standard Event
Status Enable
Register (ESE)
Publication No. 980867 Rev. A
The Standard Event Status Enable Register allows one or more
events in the Standard Event Status Register to be reflected in
the ESB summary message bit. The Standard Event Status
Enable Register is an 8-bit register that enables corresponding
summary messages in the Standard Event Status Register.
Thus, the application programmer can select reasons for the
synthesizer to issue an ESB summary message bit by altering
the contents of the ESE Register.
The Standard Event Status Enable Register is read with the
*ESE? common query. The response to this query is a number
that represents the sum of the binary-weighted value of the
Standard Event Status Enable Register.
The Standard Event Status Enable Register is written using the
*ESE command followed by a decimal value representing the
bit values of the Register. A bit value one indicates an enabled
condition. Consequently, a bit value of zero indicates a disabled
condition. The Standard Event Status Enable Register is
cleared by setting *ESE0. Summary of *ESE messages is given
in the following.
*ESE0 - No mask. Clears all bits in the register.
*ESE1 - ESB on Operation Complete.
*ESE2 - ESB on Request Control.
*ESE4 - ESB on Query Error.
*ESE8 - ESB on Device Dependent Error.
*ESE16 - ESB on Execution Error.
*ESE32 - ESB on Command Error.
*ESE64 - ESB on User Request.
*ESE128 - ESB Power on.
Error Messages
In general, whenever the 3152A receives an invalid SCPI
command, it automatically generates an error. Errors are stored
in a special error queue and may be retrieved from this buffer
one at a time. Errors are retrieved in first-in-first-out (FIFO)
order. The first error returned is the first error that was stored.
When you have read all errors from the queue, the synthesizer
responds with a 0,"No error" message.
If more than 30 errors have occurred, the last error stored in the
SCPI and HS Command Reference 4-6
Astronics Test Systems
Publication No. 980867 Rev. A
3152A User Manual
queue is replaced with -350, “Too many errors". No additional
errors are stored until you remove errors from the queue. If no
errors have occurred when you read the error queue, the
synthesizer responds with 0,"No error".
The error queue is cleared when power has been shut off or
after a *CLS command has been executed. The *RST
command does not clear the error queue. Use the following
command to read the error queue:
SYSTem:ERRor?
Errors have the following format (the error string may contain up
to 80 characters):
-102,"Syntax error"
A complete listing of the errors that can be detected by the
synthesizer is given below.
-100,"Command error". When the synthesizer cannot detect
more specific errors, this is the generic syntax error used.
-101,"Invalid Character". A syntactic element contains a
character which is invalid for that type.
-102,"Syntax error". Invalid syntax found in the command string.
-103,"Invalid separator". An invalid separator was found in the
command string. A comma may have been used instead of a
colon or a semicolon. In some cases where the synthesizer
cannot detect a specific separator, it may return error -100
instead of this error.
-104,"Data type error". The parser recognized a data element
different than allowed.
-108,"Parameter not allowed". More parameters were received
than expected for the header.
-109,"Missing parameter". Too few parameters were received
for the command. One or more parameters that were required
for the command were omitted.
-128."Numeric data not allowed". A legal numeric data element
was received, but the instrument does not accept one in this
position.
-131,"Invalid suffix". A suffix was incorrectly specified for a
numeric parameter. The suffix may have been misspelled.
-148,"Character data not allowed". A character data element
was encountered where prohibited by the instrument.
-200,"Execution error". This is the generic syntax error for the
instrument when it cannot detect more specific errors.
Astronics Test Systems
SCPI and HS Command Reference 4-7
3152A User Manual
Publication No. 980867 Rev. A
Execution error as defined in IEEE-488.2 has occurred.
-221,"Setting conflict". Two conflicting parameters were
received which cannot be executed without generating an error.
An offset value which is outside the amplitude level window may
have been sent.
-222,"Data out of range". Parameter data which followed a
specific header could not be used because its value is outside
the valid range defined by the synthesizer.
224,"Illegal parameter value". A discrete parameter was
received which was not a valid choice for the command. An
invalid parameter choice may have been used.
-300,"Device-specific-error". This is the generic devicedependent error for the instrument when it cannot detect more
specific errors. A device- specific error as defined in IEEE488.2 has occurred.
-311,"Memory error". Indicates that an error was detected in the
instrument’s memory.
-350,"Too many errors". The error queue is full because more
than 30 errors have occurred. No additional errors are stored
until the errors from the queue are removed. The error queue is
cleared when power has been shut off, or after a *CLS
command has been executed.
-410,"Query INTERRUPTED". A command was received which
sends data to the output buffer, but the output buffer contained
data from a previous command (the previous data is not
overwritten). The output buffer is cleared when power is shut off
or after a device clear has been executed.
Device-Specific
Commands
The 3152A conforms to the 1993.0 version of the SCPI
standard. Some of the commands used are not included in the
1993.0 version. However, these commands are designed with
the SCPI standard in mind and they follow all of the command
syntax rules defined by the standard. Table 4-1 lists all devicespecific commands that were designed specifically for the
3152A as not confirmed SCPI 1993.0 commands.
SCPI and HS Command Reference 4-8
Astronics Test Systems
Publication No. 980867 Rev A
3152A User Manual
Chapter 5
MAINTENANCE AND PERFORMANCE CHECKS
Maintenance
Overview
This chapter provides maintenance, service information,
performance tests, and the information necessary to adjust and
troubleshoot the 3152A Waveform Synthesizer.
WARNING:
The procedures described in this section are for use only
by qualified service personnel. Many of the steps covered
in this section may expose the individual to potentially
lethal voltages that could result in personal injury or death
if normal safety precautions are not observed.
CAUTION:
ALWAYS PERFORM DISASSEMBLY, REPAIR
CLEANING AT A STATIC SAFE WORKSTATION.
Disassembly
Instructions
AND
If it is necessary to troubleshoot the instrument or replace a
component, use the following procedure to remove the side
panels
Using a Phillips head screw driver, remove the two screws on
each side of the instrument, and one screw at the rear of the
instrument that secures the side panels.
Grasp one side panel and carefully slide and lift it off the
instrument. Use the same procedure to remove the other side
panel. After removing the side panels from the instrument,
access the component side for calibration and checks, and the
solder side when replacing components.
When replacing the side panels, reverse the above procedure.
Astronics Test Systems
Maintenance and Performance Checks 5-1
3152A User Manual
Special Handling
of Static Sensitive
Devices
Publication No. 980867 Rev. A
MOS devices are designed to operate at very high impedance
levels for low power consumption. As a result, any normal static
charge that builds up on your person or clothing may be
sufficient to destroy these devices if they are not handled
properly. When handling such devices, use precaution to avoid
damaging them as described below:
MOS IC=s should be transported and handled only in
containers specially designed to prevent static build-up.
Typically, these parts are received in static-protected containers
of plastic or foam. Keep these devices in their original
containers until ready for installation.
Ground yourself with a suitable wrist strap. Remove the
devices from the protective containers only at a properly
grounded work station.
Remove a device by grasping the body; do not touch the pins
Any printed circuit board into which the device is to be inserted
must also be grounded to the bench or table.
Use only anti-static type solder suckers.
Use only grounded soldering irons.
Once the device is installed on the PC board, the device is
adequately protected and normal handling may resume.
Cleaning
The 3152A should be cleaned as often as operating conditions
require. To clean the instrument, use the following procedure:
Thoroughly clean the inside and outside of the instrument.
When cleaning inaccessible areas, remove dust with low
pressure compressed air or a vacuum cleaner.
Use alcohol applied with a cleaning brush to remove
accumulation of dirt or grease from connector contacts and
component terminals.
Clean the exterior of the instrument and the front panel with a
mild detergent mixed with water, applying the solution with a
soft, lint-free cloth.
Maintenance And Performance Checks 5-2
Astronics Test Systems
Publication No. 980867 Rev A
Repair and
Replacement
3152A User Manual
Repair and replacement of electrical and mechanical parts must
be accomplished with great care and caution. Printed circuit
boards can become warped, cracked or burnt from excessive
heat or mechanical stress. The following repair techniques are
suggested to avoid inadvertent destruction or degradation of
parts and assemblies:
Use a 60/40 solder and temperature-controlled 35 - 40 watt
pencil-type soldering iron on the circuit board. The tip of the iron
should be clean and properly tinned for best heat transfer to the
solder joint. A higher wattage soldering iron may separate the
circuit from the base material.
Keep the soldering iron in contact with the PC board for a
minimum time to avoid damage to the components or printed
conductors.
To desolder components, use a commercial "solder sucker" or a
solder-removing SOLDER - WICK, size 3.
Always replace a component with an exact duplicate as
specified in the parts list.
Performance
Checks
The following performance checks verify proper operation of the
instrument and should normally be used:
As a part of the incoming inspection of the instrument
specifications;
As part of the troubleshooting procedure;
After any repair or adjustment before returning the instrument to
regular service.
Environmental
Conditions
Astronics Test Systems
Tests should be performed under laboratory conditions having
an ambient temperature of 25oC ±5oC and at relative humidity of
less than 80%. If the instrument has been subjected to
conditions outside these ranges, allow at least one additional
hour for the instrument to stabilize before beginning the
adjustment procedure. Always perform a self-test sequence
before commencing with the performance checks. The self-test,
if executed without any failure, ensures proper operation of the
synthesizer. If self-test failures have been encountered, the
instrument first needs to be serviced and the source of failure
removed. Instructions on how to perform self-test is given later
in this chapter in the Self-Test section.
Maintenance and Performance Checks 5-3
3152A User Manual
Publication No. 980867 Rev. A
Warm-Up Period
Most equipment is subject to a small amount of drift when it is
first turned on. To ensure accuracy, turn on the power to the
3152A and allow it to warm-up for at least 30 minutes before
beginning the performance test procedure.
Initial Instrument
Setting
To avoid confusion as to which initial setting is to be used for
each test, it is required that the instrument be reset to factory
default values prior to each test. To reset the 3152A to factory
defaults, send either of the following commands:
RESet, or *RST.
Recommended
Test Equipment
Recommended test equipment for troubleshooting, calibration
and performance checking is listed below. Test instruments
other than those listed may be used only if their specifications
equal or exceed the required characteristics.
Test Instrument & Accessories
Minimum Specification
Universal Counter
100MHz, 10ppm accuracy
DMM
ACV, 0.2%; DCV, 0.1% accuracy
Distortion Analyzer
10 Hz to 100KHz
Spectrum Analyzer
1GHz bandwidth, 1KHz resolution
Pulse/Function Generator
20 MHz, 10ns pulsewidth
Oscilloscope
2 channels, 400MHz analog bandwidth
Feedthrough termination
50Ω, 1%
BNC Cables
1 meter long, 50Ω impedance
20dB feedthrough attenuator
50Ω, 1%
“T” BNC Connector
50Ω, 1%
Maintenance And Performance Checks 5-4
Astronics Test Systems
Publication No. 980867 Rev A
3152A User Manual
Performance
Check Procedures
Use the following procedures to check the 3152A against the
specifications. A complete set of specifications is listed in
Appendix A. The following paragraphs show how to set up the
instrument for the test, what the specifications for the tested
function are, and what acceptable limits for the test are. If the
instrument fails to perform within the specified limits, the
instrument has to be calibrated or tested to find the source of
the problem.
Frequency
Accuracy
Accuracy Specifications: 0.01% of reading to 50.00 MHz
Equipment: Counter
1.
Configure the 3152A as follows:
Function:
Square
Frequency:
10 Hz
Amplitude:
1V
Remote Commands: :RES
:OUTP ON
:FUNC:SHAP SQU
:FREQ 10
:VOLT 1
Astronics Test Systems
2.
Set the counter to frequency measurement.
3.
Connect the 3152A output to the counter=s input.
Change the frequency setting as required for the test
and verify the reading on the counter display as follows:
3152A SETTING
COUNTER READING
10.00000 Hz
9.999000 Hz - 10.00100 Hz
100.0000 Hz
99.99000 Hz - 100.0100 Hz
1.000000 KHz
999.9000 Hz - 1.000100 KHz
10.00000 KHz
9.999000 KHz - 10.00100 KHz
100.0000 KHz
99.99000 KHz - 100.0100 KHz
1.000000 KHz
999.9000 KHz - 1.000100 KHz
10.00000 MHz
9.999000 MHz - 10.00100 MHz
50.00000 MHz
49.99500 MHz - 50.00500 MHz
Maintenance and Performance Checks 5-5
3152A User Manual
Amplitude
Accuracy
Publication No. 980867 Rev. A
Accuracy Specifications (1 KHz):
± (1% of reading +200 μV), to 160 mV
± (1% of reading +2 mV), to 1.6 V
± (1% of reading +20 mV), to 16 V
Equipment: DMM, 50Ω feedthrough termination
1.
Configure the 3152A as follows:
Function:
Sine
Frequency:
1.000 KHz
Amplitude:
15 V
Remote Commands: :RES
:OUTP ON
:FUNC:SHAP SIN
:FREQ 1000
:VOLT 15
DC Offset
Characteristics
2.
Set the DMM to ACV measurements (RMS).
3.
Connect the 3152A output to DMM input. Terminate the
output with a 50Ω feedthrough termination. Set the
amplitude and verify DMM reading as follows:
3152A SETTING
DMM READING
15.00 V
5.373 V - 5.230 V
1.500 V
537.3 mV - 523.0 mV
150.0 mV
53.73 mV - 52.30 mV
Accuracy Specifications:
± (1% of reading +1% of amplitude +200 μV), ∀80 mV window
± (1% of reading +1% of amplitude +2 mV), ∀800 mV window
± (1% of reading +1% of amplitude +20 mV) ∀8 V window
Equipment: DMM, 50Ω feedthrough termination
1.
Configure the 3152A as follows:
Maintenance And Performance Checks 5-6
Astronics Test Systems
Publication No. 980867 Rev A
3152A User Manual
Function:
Sine
Frequency:
1.000 MHz
Amplitude:
1.61 V
Remote Commands: :RES
:OUTP ON
:FUNC SIN
:FREQ 1e6
:VOLT 1.61
:VOLT:OFFS 5
2.
Set the DMM to DCV measurements
3.
Connect the 3152A output to the DMM input. Terminate
the output with a 50Ω feedthrough termination. Set the
3152A offset and verify the DMM reading as follows:
4.
5.
Astronics Test Systems
OFFS SETTING
DMM READING
±5.000 V
±5.070 V to ±4.930 V
Change the 3152A AMPL setting to 161 mV. Set
VOLT:OFFS and verify the DMM reading as follows:
OFFS SETTING
DMM READING
±500.0 mV
±507.0 mV to ±493.0 mV
Change the 3152A AMPL setting to 16.1 mV. Set
VOLT:OFFS and verify the DMM reading as follows:
OFFS SETTING
DMM READING
±50.00 mV
±50.70 mV to ±49.30 mV
Maintenance and Performance Checks 5-7
3152A User Manual
Squarewave
Characteristics
Publication No. 980867 Rev. A
Specified Transition Time: 5ns typical (10% to 90% of
amplitude)
Specified Aberration: <5% of amplitude
Equipment: Oscilloscope, 20dB attenuator
1.
Configure the 3152A as follows:
Function:
Square wave
Frequency:
1.000 MHz
Amplitude:
10 V
Remote Commands: :RES
:OUTP ON
:FUNC:SHAP SQU
:FREQ 10e6
:VOLT 10
Connect the 3152A output to the oscilloscope input. Use the 20
dB attenuator and set the oscilloscope input impedance to 50Ω.
Set the oscilloscope and verify that the rise and fall times are
less than 6 ns. Verify that overshoot and ringing are less than
5% of amplitude.
Sine
Characteristics
Specified Total Harmonic Distortion: <0.1% from 10.00Hz to
100.0KHz (with a 4000 point waveform).
Specified Harmonic Signals:
<5MHz, <10Vp-p, -50dBc
<5MHz, <16Vp-p, -45dBc
<10MHz, <10Vp-p, -40dBc
<10MHz, <16Vp-p, -35dBc
<50MHz, <10Vp-p, -28dBc
<50MHz, <16Vp-p, -23dBc
Maintenance And Performance Checks 5-8
Astronics Test Systems
Publication No. 980867 Rev A
3152A User Manual
Equipment:
Krohn-Hite 6900 (or equivalent) Distortion
Analyzer, RF Spectrum Analyzer, 50Ω feedthrough termination
(or 20dB 50Ω attenuator if required).
1.
Connect the 3151 output to distortion analyzer input.
2.
Set the distortion analyzer to distortion measurements,
set the 3151 frequency setting, and verify the distortion
reading as below.
3.
Configure the 3151 as follows:
Function:
USER Waveform
Frequency:
10.00Hz
Amplitude:
5V
Remote Commands ::RES
:OUTP ON
:FUNC:MODE USER
:TRAC:DEF 4000
:TRAC:SEL 1
:FREQ:RAST 40e3
:VOLT5
Using WaveCAD, change the axis (Setup | Axis) to have 4000
points (0 to 3999) for the first 4 steps below and 1000 points (0
to 999) for step 5 below. Download a 1k or 4k sine waveform
(Wave | Sine | OK) into segment 1.
FREQ:RAST # of Points
Frequency
Distortion Reading
40e3
4000
10Hz
< 0.1%
40e4
4000
100Hz
< 0.1%
40e5
4000
1kHz
< 0.1%
40e6
4000
10kHz
< 0.1%
100e6
1000
100kHz
< 0.1%
Tune the spectrum analyzer to the carrier frequency and adjust
the gain so the fundamental corresponds to 0 dB.
Connect the 3152A output to spectrum analyzer input through a
20dB feedthrough attenuator.
Astronics Test Systems
Maintenance and Performance Checks 5-9
3152A User Manual
Publication No. 980867 Rev. A
Set the 3152A FREQ setting and verify the harmonic distortions
levels as follows:
FREQ SETTING
Sine Flatness
HARMONICS LEVEL
5.000 MHz
<48 dB
50.00 MHz
<28 dB
Level Flatness: ±1% to 1.000 MHz; ±5% to 10.00 MHz; ±15%
to 50.00 MHz
Equipment: Oscilloscope
1.
Configure the 3152A as follows:
Function:
Sine wave
Frequency:
1.000 KHz
Amplitude:
6V
Remote Commands: :RES
:OUTP ON
:FREQ 10e3
:VOLT 6
2.
Connect the 3152A OUTPUT to the oscilloscope, set the
oscilloscope input impedance to 50Ω, and set the
oscilloscope to display the sinewave within exactly 6
vertical divisions.
3.
Change the 3152A FREQ setting to 1.000 MHz. Verify
that peak-to-peak of the displayed sinewave is within 5.9
to 6.1 divisions.
4.
Change the 3152A FREQ setting to 10.00 MHz. Verify
that peak-to-peak of the displayed sinewave is within 5.7
to 6.3 divisions.
5.
Change the 3152A FREQ setting to 50.00 MHz. Verify
that peak-to-peak of the displayed sinewave is within 5.1
to 6.9 divisions.
Maintenance And Performance Checks 5-10
Astronics Test Systems
Publication No. 980867 Rev A
Trig, Gate and
Burst
Characteristics
3152A User Manual
Triggered - Each transition at the front panel TRIG IN connector
stimulates the 3152A to generate one complete output
waveform.
Gated - External signal at the TRIG IN connector enables the
3152A output. The last cycle of the output waveform is always
completed.
Burst - Each transition at the front panel TRIG IN connector
stimulates the 3152A to generate a burst of pre-selected
number of cycles.
Equipment: Pulse/function generator (8021), oscilloscope.
Trigger
1.
Configure the 3152A as follows:
Function:
Sine wave
Frequency:
1.000 MHz
Operating Mode:
Triggered
Remote Commands: :RES
:OUTP ON
:FREQ 1e6
:INIT:CONT OFF
2.
Set the external pulse/function generator frequency to
10 KHz and connect its SYNC connector. Set the
oscilloscope and verify on the oscilloscope that the
The 3152A outputs a triggered signal. Leave the external
pulse generator connected to the 3152A for the next test.
Gate
1.
Configure the 3152A as follows:
Function:
Sine wave
Frequency:
1.000 KHz
Operating Mode:
Gated
Remote Commands: :RES
:OUTP ON
:FREQ 1e3
Astronics Test Systems
Maintenance and Performance Checks 5-11
3152A User Manual
Publication No. 980867 Rev. A
:INIT:CONT OFF
:GATE:STAT ON
Set the oscilloscope and verify that the 3152A outputs a gated
signal. Leave the external pulse generator connected to the
3152A for the next test.
Burst
1.
Configure the 3152A as follows:
Function:
Sine wave
Frequency:
1.000 KHz
Operating Mode:
Burst
Remote Commands: :RES
:OUTP ON
:FREQ 10e3
:INIT:CONT OFF
:BURST:STAT ON
:TRIG:COUN 10
2.
Set the oscilloscope and verify that the 3152A outputs a
burst of 10 complete output waveforms. Remove the
external pulse generator connection from the 3152A for
the next test.
Maintenance And Performance Checks 5-12
Astronics Test Systems
Publication No. 980867 Rev A
PLL
Characteristics
3152A User Manual
Accuracy: 5.4 x frequency (in MHz) + resolution / 2 ±5°
Equipment: Oscilloscope, Counter, Pulse/Function Generator,
Feedthrough Terminator, 3 BNC Cables, 50Ω Tee Connector
1.
Configure the 3152A as follows:
Function:
Square wave
Mode:
Front Panel PLL
Frequency:
1.000 KHz
Amplitude:
2V
Trigger Level:
0V
Remote Commands: :RES
:OUTP ON
:FUNC:SHAP SQU
:PHAS2:LOCK ON
:TRIG:LEV 0
:VOLT 2
2.
Make the following connections:
a. Connect function generator output to the input of
the 50Ω Tee Connector.
b. Connect one end of the 50Ω Tee Connector to the
3152A TRIG IN and the other end to the counter
Channel A input.
c. Connect 3152A OUT to the counter Channel B
input.
Astronics Test Systems
3.
Set counter to phase measurements. Terminate counter
inputs with 50Ω.
4.
Set Pulse/Function generator to output 2 Vp-p square
waveforms. Change 3152A and Pulse/Function generator
frequency and verify counter phase readings as shown
below.
Maintenance and Performance Checks 5-13
3152A User Manual
Publication No. 980867 Rev. A
3152A FREQ. PULSE GENERATOR
SETTING
FREQ. SETTING
COUNTER READING
10.00 MHz
10.00 MHz
0° ±77°
1.000 MHz
1.000 MHz
0° ±12.2°
100.0 KHz
100.0 KHz
0° ±5.72°
10.00 KHz
10.00 KHz
0° ±5°
5.
Change the 3152A PHAS2:ADJ setting to 180°. Change
3152A and Pulse/Function generator frequency and verify
counter phase readings as shown below.
3152A FREQ. PULSE GENERATOR
SETTING
FREQ. SETTING
COUNTER READING
10.00 KHz
10.00 KHz
180° ±5°
6.
Change the 3152A PHAS2:ADJ setting to -180°. Change
3152A and Pulse/Function generator frequency and verify
counter phase readings as shown below.
3152A FREQ. PULSE GENERATOR
SETTING
10.00 KHz
7.
FREQ. SETTING
COUNTER READING
-180° ±5°
10.00 KHz
Change the 3152A PHAS2:ADJ setting to 0°. Change
3152A and Pulse/Function generator frequency and verify
counter phase readings as shown below. Note the exact
phase reading.
3152A FREQ. PULSE GENERATOR
SETTING
FREQ. SETTING
10.00 KHz
10.00 KHz
8.
COUNTER READING
0° ±5° (Note and record
the exact reading)
Change the 3152A PHAS2:ADJ setting to 0° and
Verify counter phase
PHAS2:FINE setting to 36°.
readings as shown below. Note the exact phase reading.
3152A FREQ. PULSE GENERATOR
SETTING
FREQ. SETTING
10.00 KHz
10.00 KHz
Maintenance And Performance Checks 5-14
COUNTER READING
Recorded result from step 7
+36° ±3.6°
Astronics Test Systems
Publication No. 980867 Rev A
3152A User Manual
Adjustments
Environmental
Conditions
Adjustments should be performed under laboratory conditions
having an ambient temperature of 25oC ±5oC and relative
humidity of less than 80%. If the instrument has been outside
this range, allow at least one additional hour for the instrument
to stabilize before beginning the adjustment procedure.
Between adjustments, always leave the top cover on the unit to
keep the internal temperature as stable as possible.
Warm-Up Period
Most equipment is subject to a small amount of drift when first
turned on. To ensure long term calibration accuracy, turn on the
power to the 3152A and allow it to warm-up for at least 30
minutes before beginning the adjustment procedure.
Recommended
Test Equipment
Recommended test equipment for calibration is listed at the
beginning of this chapter in the section entitled Recommended
Test Equipment. Test instruments other than those listed may
be used only if their specifications equal or exceed the required
characteristics.
Adjustment
Procedures
All adjustments are performed with the POWER ON. The side
covers should be removed to allow access to test points and
adjustments.
WARNING:
Special care should be taken to prevent contact with live
circuits or the power line area. This could cause an
electrical shock resulting in serious injury or death. Use an
isolated tool when making adjustments.
When necessary, refer to the component layouts for
determining adjustment points. Follow the procedure in the
sequence indicated as some adjustments are interrelated
and dependent on the proceeding steps.
Verify that the waveform generator
according to the performance checks.
results are within or close to the range
specifications; otherwise, refer to the
procedures given later in this section.
is functioning
Ensure that all
of the required
troubleshooting
Perform the following adjustment procedure. If an
adjustment cannot be made to obtain a specific result, refer
to the troubleshooting procedures.
Astronics Test Systems
Maintenance and Performance Checks 5-15
3152A User Manual
Publication No. 980867 Rev. A
NOTE:
If not otherwise specified, configure the instrument to
factory defaults before each adjustment by sending the
*RST command. Always connect the output BNC connector
through a 50Ω feed through termination.
Pulse Response
Adjustment
Equipment: Oscilloscope (2465B), 20dB Attenuator
1.
Configure the 3152A as follows:
Function:
Square
Frequency:
1 MHz
Amplitude:
10 V
Remote Commands:
:RES
:OUTP ON
:FUNC:SHAP SQU
:FREQ 1e6
:VOLT 10
2.
Connect the 3152A output through 20dB attenuator to
the oscilloscope input.
3.
Set the oscilloscope input impedance to 50Ω.
4.
Set the oscilloscope vertical gain and time base, and
adjust R36 and C19 for the best pulse response.
5.
Change the 3152A frequency setting to 10.00 KHz.
6.
Set the oscilloscope vertical gain and time base, and
adjust R22 for best pulse flatness.
7.
Change the 3152A frequency setting to 1.000 KHz and
retouch R22 for best flatness in this range. Repeat
Steps 5 and 6 until the best result is obtained in both
steps.
Maintenance And Performance Checks 5-16
Astronics Test Systems
Publication No. 980867 Rev A
Amplitude
Adjustment
3152A User Manual
Equipment: DMM, 50Ω feedthrough termination
1.
Configure the 3152A as follows:
Function:
Sine
Frequency:
1 KHz
Amplitude:
16 V
Remote Commands:
:RES
:OUTP ON
:FREQ 1E3
:VOLT 16
Offset Adjustment
2.
Connect the 3152A output to the DMM input through
the 50Ω feedthrough termination. Set the DMM to AC
Volt measurements and 2 V range.
3.
Adjust R44 until the DMM reading is 5.657 V ±20 mV.
4.
Change the 3152A amplitude setting to 2.0 V.
5.
Adjust R44 until the DMM reading is 0.707V ±6 mV.
6.
Repeat Steps 4 and 5 until the best result is obtained in
both steps.
Equipment: DMM, 50Ω feedthrough termination
1.
Configure the 3152A as follows:
Function:
Sine
Frequency:
1 MHz
Amplitude:
1.61 V
Offset:
+7.19V
Remote Commands:
:RES
:OUTP ON
:FREQ 1e6
:VOLT 1.61
:VOLT:OFFS 7.19
Astronics Test Systems
Maintenance and Performance Checks 5-17
3152A User Manual
VCO Adjustment
Publication No. 980867 Rev. A
2.
Connect the 3152A output to the DMM input through
the 50Ω feedthrough termination. Set the DMM to DCV
measurements and 10 V range. Record this reading.
3.
Change the offset setting to -7.19 V and adjust R85 to
have the exact reading as was recorded in the previous
step (with reversed polarity).
4.
Adjust R62 until the DMM reading is -7.190 V ±30 mV.
5.
Repeat Steps 3 and 4 until the best result is obtained in
both steps.
Equipment: DMM
1.
PLL Adjustment
Configure the 3152A as follows:
Function:
Sinewave
Output:
On
Remote Commands:
:RES
2.
Connect the DMM “V” input to U515 pin 1 and the DMM
“common” nput to case ground. Set the DMM to DCV
measurements.
3.
Adjust R536 until the DMM reading is 0 V ±500 mV.
Equipment: Oscilloscope, Counter, Pulse/Function Generator,
Feedthrough Terminator, 3 each BNC Cables, 50Ω Tee
Connector
1.
Configure the 3152A as follows:
Function:
Square wave
Mode:
Front Panel PLL
Frequency:
10.00 KHz
Mode:
PLL
Phase Offset
45°
Amplitude:
2V
Trigger Level:
0V
Remote Commands:
:RES
:OUTP ON
Maintenance And Performance Checks 5-18
Astronics Test Systems
Publication No. 980867 Rev A
3152A User Manual
:FUNC:SHAP SQU
:FREQ 10.00E3
:PHAS2:LOCK ON
:PHAS2:ADJ 45
:TRIG:LEV 0
:VOLT 2
2.
Make the following connections:
a. Connect function generator output to the input of
the 50Ω "T" Connector.
b. Connect one end of the 50Ω "T" Connector to the
3152A TRIG IN and the other end to the counter
Channel A input.
c. Connect the 3152A OUT to the counter Channel
B input.
Troubleshooting
Astronics Test Systems
3.
Set counter to phase measurement. Terminate counter
inputs with 50Ω.
4.
Set Pulse/Function generator to output a 2 Vp-p, 10KHz
square waveform.
5.
Adjust R535 for a counter reading of 45°, ±3° Note and
record the exact counter reading for the next
adjustment.
6.
Set 3152A PHAS2:FINE to 36. Adjust R537 until
reading falls within the following reading:
7.
Value recorded in step 5 + 36°, ±2°.
The troubleshooting instructions contained in this section are
intended for qualified personnel having basic understanding of
analog and digital circuitry. The individual should also be
experienced at using typical test equipment as well as ordinary
troubleshooting procedures. The information presented here
has been written to assist in isolating a defective circuit or circuit
section. Isolation to a specific component is left to the
technician.
Maintenance and Performance Checks 5-19
3152A User Manual
Publication No. 980867 Rev. A
Recommended
Test Equipment
Recommended test equipment for troubleshooting and
adjustment of the 3152A are listed in the section entitled
Recommended Test Equipment in the beginning of this
chapter. Other equipment such as a logic analyzer, an in-circuit
emulator, etc., could also be helpful in a difficult situation.
Power-Up Tests
Upon power-up, the 3152A performs a set of tests. If the
instrument locks up after power on, proceed with the
troubleshooting procedure given in the following paragraphs.
Self-Test
An advanced feature of the 3152A is its self-test capability. This
feature helps in reducing troubleshooting time of faulty circuits
to the minimum. If the instrument fails its self-test procedure, it
will generate an error bit.
*TST? initiates the self-test
procedure. If the instrument executes its self-test without
errors, 0 is placed at the output queue. Non-zero indicates selftest failure.
The self-test procedure is intended to verify general operation of
the 3152A. It does not test for accuracy. Therefore, it should
be used as an indication that the 3152A operates, in general.
The self-test procedure checks about 90% of the 3152A
hardware. If the self-test procedure fails to respond correctly,
troubleshooting the 3152A is suggested using the procedure
given below.
The troubleshooting procedure should also be initiated
whenever the synthesizer fails to perform either completely or
partially. It is also required to troubleshoot the 3152A whenever
the instrument fails to fully comply with its published
specifications. The information given in the following does not
intend to replace full scale troubleshooting, but merely to direct
the Service Technician to the area were the source of the
trouble is located.
Main Board Circuit
Checkout
The 3152A is made of two boards. The large board (Part
Number 7100-2370) is the main board. There is a smaller
board mounted on the main board with three connectors (Part
Number 7100-2360). This smaller board is called the “engine
board.” The following checks are made on the main board. To
gain access to components below the engine board, it may be
necessary to remove this board entirely. To do so, remove the
three screws that tie the engine board to the main board, grasp
the engine board from both sides and pull away from the main
board.
Maintenance And Performance Checks 5-20
Astronics Test Systems
Publication No. 980867 Rev A
Power Supply
Checkout
3152A User Manual
It is suggested that the first step in troubleshooting the 3152A
would be to check the power supply rails. If the various supply
voltages within the instrument are not within the required limits,
troubleshooting the remaining circuits can be very difficult.
The supply voltages are supplied to the 3152A through the
backplane. In case of a "dead short" between one of the
supplies to the common ground, disconnect the entire supply
section from the remaining circuitry, and then determine
whether the problem is in the power supply or in the remaining
circuits.
A few preliminary checks could help here. First remove the
3152A from the VXIbus chassis. Turn on the VXIbus chassis
and verify that the supply voltages are available directly on the
backplane sockets. Check the following supplies: +24V, -24V,
+12V, -12V, +5V, and -5.2V. Check the ripple on these lines
using an oscilloscope.
Plug an extension card into one of the slots and plug the 3152A
into the extension card. Turn the chassis power on and repeat
the supply voltage tests as above. If one of the voltages is
missing or not within the specified range, it is possible that one
of the supply lines is shorted inside the 3152A. Remove the
filter chokes L12 and L13 if there are problems on the +24V or
-24V lines; remove L8 or L9 if there are problems on the +5V or
-5.2V lines, or remove L10 or L11 if there are problems on the
+12V or -12V lines.
CPU and VXI ASIC
Checkout
The most important section to be verified after power supply
checkout is the CPU and the VXI ASIC section with its various
clocks, address, data lines, and chip select serial data
communication components. Problems with the digital part
could cause erratic operation or erroneous response to word
serial commands.
Problems in the CPU and the digital circuit may cause a
complete malfunction of the entire instrument. The CPU would
not start generating control signals. This makes it impossible to
troubleshoot the remaining circuits. Check the various
components associated with the CPU circuitry, its clocks, and
the components associated with the VXI ASIC using the
information given in Table 5-1.
Astronics Test Systems
Maintenance and Performance Checks 5-21
3152A User Manual
Publication No. 980867 Rev. A
Table 5-1, CPU and VXI Interface Checkout Procedure
Step
Test Point
Expected Result
1
CPU Clock - U87 pin 19
16 MHz TTL level clock
2
VXI Clock - U109 pin 159
16 MHz TTL level clock
3
ALE - U85 pin 11
Positive going pulses; period 375 ns,
pulse width 120 ns
4
PSEN - U74a and U74b
2.67 MHz TTL level pulses
5
Load a 10000-point wave and
perform the following tests during
load time
6
RD - U87 pin 16
Negative going 400 ns width pulses
7
WR - U87 pin 17
Negative going 400 ns width pulses
8
LDACK - U87 pin 5
Negative going 6.5 μs width pulses
9
ASIC LCS - U104 pin 11
Negative going 6.5 μs width pulses
10
LR/W - U93 pin 19
Negative going 60 μs width pulses
Output Amplifier
and Amplitude
Control Checkout
Problems with the output amplifier and amplitude control circuits
can be detected if the 3152A accepts word serial commands
and responds correctly to word serial queries, but fails to output
the correct waveform with correct amplitude and offset levels. If
there is a problem with the output amplifier or with the amplitude
control circuit, proceed with the checkout procedure given in
Table 5-2.
Before starting the following procedure, reset the 3152A to the
factory defaults using the *RST command. Then send the
command OUTPUT ON.
Maintenance And Performance Checks 5-22
Astronics Test Systems
Publication No. 980867 Rev A
3152A User Manual
Table 5-2, Output Amplifier and Amplitude Control Checkout Procedure
Step
Test Point
Expected Result
1
Junction of R57 and R58
750 mVp-p sinewave, 1 MHz
2
Junction of R18 and R19
10 Vp-p sinewave, 1 MHz
3
Voltage across R37, R41, R46, and
R49
Approximately 1.6 V
4
CE voltage on Q9
Approximately 2.8 V
5
U7, pin 1
Approximately -1.1 V
6
U7, pin 7
Approximately 400 mV
7
Change amplitude setting to 1.61V and offset setting to 7V
8
U8, pin 1
Approximately -320 mV
9
U8, pin 7
Approximately -2 V
Clock Synthesizer
Checkout
Problems with the clock synthesizer circuits can be detected if
the 3152A accepts word serial commands and responds
correctly to word serial queries, but fails to output the correct
waveform frequency. If there is a problem with the clock
synthesizer circuit, proceed with the checkout procedure given
in Table 5-3.
Before you start with the following procedure, reset the 3152A
to the factory default using the *RST command and change
frequency setting to 1 MHz.
Astronics Test Systems
Maintenance and Performance Checks 5-23
3152A User Manual
Publication No. 980867 Rev. A
Table 5-3, Clock Synthesizer Checkout Procedure
Step
Test Point
Expected Result
1
U510 pin 7
100 MHz ECL level clock
2
U16 pin 15
50 MHz ECL level clock
3
U16 pin 2
25 MHz ECL level clock
4
U505 pin 21
1.5625 MHz TTL level clock
5
U506 pin 6
1.5625 MHz ECL level clock
6
U506 pin 2
1.5625 MHz square waves 2 Vp-p
7
U503 pin 1
1.5625 MHz ECL level clock
8
U503 pin 2
1.5625 MHz ECL level clock
9
Q502, Q503 collector
1.5625 pulses 3 Vp-p on 5 V offset
10
U516 pin 6
Approximately 12 VDC
11
U17 pin 15
100 MHz ECL level clock
Sequence
Generator
Checkout
Problems with the sequence generator circuits can be detected
if the 3152A accepts word serial commands and responds
correctly to word serial queries, but fails to output sequences or
bursts. If there is a problem with the sequence generator
circuits, proceed with the checkout procedure given in Table 54.
Before starting the following procedure, reset the 3152A to the
factory default using the *RST command. Configure the 3152A
to sequenced output mode and load three different waveforms 100 points long, to segments 1, 2, and 3, respectively. Program
each step to repeat once. Use the following commands after
loading the waveforms.
Remote Commands:
:FUNC:MODE SEQ
:SEQ:DEF 1,1
:SEQ:DEF 2,1
:SEQ:DEF 3,1
:OUTP ON
Maintenance And Performance Checks 5-24
Astronics Test Systems
Publication No. 980867 Rev A
3152A User Manual
Table 5-4, Sequence Generator Checkout Procedure
Step
Test Point
Expected Result
1
U45 pin 1, U42 pin 11
Negative going pulses; 2 ns width, 100 μs period
2
U46 pin 1, and 3
Same as above
3
U42 pin 12
Negative going pulses; 100 μs width, 200 μs period
4
U42 pin 8, U43 pin 14
Negative going pulses; 2 μs width, 100 μs period
5
U44 pin 14, U47 pin 14
Same as above
6
U47 pin 5
Negative going pulses; 2 μs width, alternating 100 μs
and 200 μs periods
7
U47 pin 2, and 3
Positive going pulses; 100 μs width, 200 μs period
The next checkout is done on the 3152A configured to operate
in burst mode with 5 bursts. Use the following command to
configure the 3152A:
Remote Commands:
:FUNC:MODE USER
:TRAC:SEL 1
:INIT:CONT OFF
:TRIG:BURS: ON
:TRIG:COUN 5
:OUTP ON
Connect an external trigger source to the front panel TRIG IN
connector. Set external trigger frequency to 1 KHz. Proceed
with the checkout procedure given in Table 5-5.
Astronics Test Systems
Maintenance and Performance Checks 5-25
3152A User Manual
Publication No. 980867 Rev. A
Table 5-5, Burst Generator Checks
Step
Test Point
Expected Result
1
U56 through U60 pin 2
Five negative going pulses; 2 ns width, 100 μs
period, repeated every 1 ms
2
U56 through U60 pin 9
Positive going pulses; 200 μs width, 1 ms period
3
U49 pin 2
Positive going pulses; 400 μs width, 1 ms period
4
U49 pin 5
Positive going pulses; 300 μs width, 1 ms period
Problems with the phase lock loop circuits can be detected if
the 3152A accepts word serial commands and responds
correctly to word serial queries, but fails to lock to a valid
external signal. If there is a problem with the PLL circuits,
proceed with the checkout procedure given in Table 5-6.
PLL Checkout
Before starting the following procedure, reset the 3152A to the
factory default using the *RST command. Configure the 3152A
to PLL mode, 10 MHz frequency and square waveform. Use
the following commands after loading the waveforms.
Remote Commands:
:RES
:OUTP ON
:FREQ 10E6
:PHAS2:LOCK ON
:TRIG:LEV 0
Connect an external 10 KHz, 2 Vp-p square waveform to the
TRIG IN BNC. Proceed with the checkout procedure given in
Table 5-6.
Table 5-6, PLL Checkout Procedure
Step
Test Point
Expected Result
1
U513 pin 6
0 KHz square waveform, ECL logic level
2
U513 pin 11
20 μs width positive going pulses; 100 μs period,
ECL
3
Q502, Q503 collectors
3 Vp-p narrow pulses on 5 V offset
Maintenance And Performance Checks 5-26
Astronics Test Systems
Publication No. 980867 Rev A
3152A User Manual
Engine Board Circuit
Checkout
As described in the paragraph Main Board Circuit
Checkout, the 3152A is made of two boards. If the engine
board is removed from the main board, reinstall it before
continuing with the following checks. The following circuit
checks are performed on the engine board only.
Engine Board
Checkout
The "engine board" is the analog heart of the 3152A. It
contains the waveform memory circuit, high frequency
clock drives, and circuitry that drives the D/A converter.
The output of the D/A converter is routed directly from the
engine board to the output amplifier located on the main
board.
Problems with the engine board circuits can be detected if
the 3152A accepts word serial commands and responds
correctly to word serial queries, however, fails to generate
waveforms. If there is a problem with the engine board
circuits, proceed with the checks given in Table 5-7a.
Before starting the following procedure, reset the 3152A to
the factory default using the *RST command.
Astronics Test Systems
Maintenance and Performance Checks 5-27
3152A User Manual
Publication No. 980867 Rev. A
Table 5-7a, Engine Board Checkout Procedure - #1
Step
Test Point
Expected Result
1
U27 pin 2
±2.5 V squarewave, 1 MHz
2
U41 pins 1 to 11, pin
28
-0.8 V to -1.8 V ECL level squarewave, 1 MHz
3
U41 pin 26
ECL Level Negative going pulses; 2 ns width, 1 MHz
4
U29, U46, U51 pin 1
TTL Level, 50 MHz
5
U17-U20 pins 13-21
TTL Level, 1 MHz
6
U31,U32,U35,U36 pins
17 through 20
TTL Level, 1 MHz
7
U53-U57 pins 13-21
TTL Level, 1 MHz
8
U31-U32 pins 13-15
TTL Level, Positive going pulses; 20 ns width, 1 MHz
9
U35-U36 pins 13-15
TTL Level, Positive going pulses; 20 ns width, 1 MHz
10
U37,U38,U58,U60 pin
9
TTL Level, Negative going pulses; 20 ns width, 1
MHz
11
U39 pin 5
TTL Level, Positive going pulses; 20 ns width
12
U18 pin 4
ECL Level 100 MHz
13
U18 pin 2
ECL Level 100 MHz
14
U15 pin 2, U16 pins
2,3,14,15, U19 pins
2,3,9 14, U20 pin 14,
U21 pin 6, 11, U22 pin
6
ECL Level 100 MHz
Change the 3152A setting to triggered. Use an external
pulse generator to apply a TTL level, 200 KHz signal to
the TRIG IN connector. Proceed with the checks given in
Table 5-7b.
Maintenance And Performance Checks 5-28
Astronics Test Systems
Publication No. 980867 Rev A
3152A User Manual
Table 5-7b, Engine Board Checkout Procedure - #2
Step
Test Point
Expected Result
1
U13 pin 16
TTL Level, 200 KHz
2
U13 pins 8
TTL Level Positive going pulses; 10 ns width, 200 KHz
3
U39 pin 13
TTL Level Negative going pulses; 10 ns width, 200
KHz
4
U39 pin 8
TTL Level Positive going pulses; 1 µs width, 200 KHz
5
U26 pin 11
TTL Level Negative going pulses; 1 µs width, 200 KHz
6
U24 pin 1
ECL Level Negative going pulses; 1 µs width, 200 KHz
Change the 3152A setting to delayed trigger and change delay
to 100. Use an external pulse generator to apply a TTL level
and 200 KHz signal to the TRIG IN connector. Proceed with the
checks given in Table 5-7c.
Table 5-7c, Engine Board Checkout Procedure - #3
Step
Test Point
Expected Result
1
U14 to U8 pin 9
TTL Level Positive going pulses; 1 µs width, 200 KHz
2
U10 pin 1, U39 pin
13
TTL Level Negative going pulses; 10 ns width, 200 KHz
Astronics Test Systems
Maintenance and Performance Checks 5-29
3152A User Manual
Publication No. 980867 Rev. A
This page was left intentionally blank.
Maintenance and Performance Checks 5-30
Astronics Test Systems
Publication No. 980867 Rev. A
3152A User Manual
Appendix A
3152A SPECIFICATIONS
VXIbus General
Information
Module Form
Single slot VXIbus C-size
module
Connectors
P1, P2
Protocol
A16/A24/A32/D16 Slave,
Message-Based
VXIbus Revision
1.4
SCPI Revision
1993.0
Optional Command
3152, 3152S1619,
Tektronix VX4750 (all
optional)
Emulation Modes
Alternate Command Set
High speed numerical
commands
Logical Address Settings
1 - 255, configured via DIP
switches
Interrupt Level Settings
1 - 7, configured
dynamically (no DIP
switch)
Shared Memory
A24 or A32, D16, 512K
points. Note: 1 point = 2
bytes, shared memory is
the same as waveform
memory.
Astronics Test Systems
3152A Specifications A-1
3152A User Manual
Synthesizer
Reference
Sources/Sample
Clock
Publication No. 980867 Rev. A
Reference Sources
External Reference Input from:
VXIbus CLK10
Optional Internal Reference:
PCB layout provides for
optional internal
10 MHz TCXO with 1 ppm
accuracy
Sample Clock
External Clock Input from:
(1)
Front Panel BNC, Frequency to 100 MHz, ECL
compatible
(2)
ECLTRG0, Synchronous Protocol, ECLTRG trigger
acceptor requirements with regard to pulse width and
frequency are waived.
External Clock Output to:
ECLTRG0, Synchronous Protocol, VXIbus ECLTRG trigger
source requirements with regard to pulse width and frequency
are waived.
Triggering
Characteristics
3152A Specifications A-2
Trigger Input
Impedance
1 kΩ, ±5%
Level
±10 V
Resolution
10 mV
Sensitivity
100 mV rms
Accuracy
±(5% of level + 150 mV)
Maximum Input Voltage
30 V rms
Minimum Pulse Width
20 ns
Slope
Positive or negative going
edges, programmable
Astronics Test Systems
Publication No. 980867 Rev. A
3152A User Manual
Modes
Normal
Continuous waveform is
generated
Triggered
Each input cycle generates a
single output cycle
Internal Trigger
An internal timer repeatedly
generates a single output cycle
Gated
External signal enables generator.
First output cycle synchronous
with the active slope of the
triggering signal.Last cycle of
output waveform is always
completed.
External Burst
Preset number of up to 1 million
cycles are stimulated by an
internal, external, or manual
trigger.
Internal Burst
An internal timer or software
command generates one or more
bursts of up to 1 million counted
output cycles.
Delayed Trigger
0 to 2 million clock cycles
Trigger Frequency
External
To 5 MHz or VXIbus trigger
Internal
From 15 μs to 1000 s
Accuracy
±4%, 15 μs to 59 μs;
±2%, 60 μs to 0.99 ms;
±0.1%, 1 ms to 99.9 ms;
±0.01%, 100 ms to 1000 s
Astronics Test Systems
3152A Specifications A-3
3152A User Manual
Publication No. 980867 Rev. A
Trigger Sources
Trigger functionality is optionally to:
(1)
cause one complete cycle of the selected waveform to
be output.
(2)
gate the waveform output while the trigger signal is
asserted.
Software
IEEE-STD-488.2 *TRG, VXI Word
Serial trigger
Internal
Internal programmable rate
generator
System Delay
From External Trigger input to
Waveform Output
Standard Waveforms
120ns + 2 sample clock periods ± 1
sample clock period
Arbitrary Waveforms
150ns + 2 sample clock periods ± 1
sample clock period
External Input from:
1)
Front panel BNC, TTL compatible, positive slope
2)
TTLTRG0-7, Synchronous Protocol, negative
VXIbus TTLTRG trigger acceptor requirements:
slope,
Minimum pulse width (logic low - asserted) : 20 ns,
Minimum pulse width (logic high - unasserted) : 20 ns,
External Output to:
TTLTRG0-7, Synchronous Protocol, negative slope,
VXIbus TTLTRG trigger source requirements:
Minimum pulse width (logic low - asserted) : 30 ns
Minimum pulse width (logic high - unasserted) : 80ns
Maximum Clock Frequency : 50 MHz
Note: For the external trigger output, the trigger source is
the programmable Synchronous Signal.
3152A Specifications A-4
Astronics Test Systems
Publication No. 980867 Rev. A
3152A User Manual
For trigger operation when synchronized, the trigger circuit in
the master module has control of the sample clock for all
modules. Therefore, the master module must be triggered
before any slave can output it's waveform.
Backplane MultiModule
Synchronization
Multiple 3152A modules may be synchronized. A master 3152A
module provides the necessary signals to slave 3152A modules
to achieve synchronization. The signals required are sample
clock (distributed on ECLTRG0) and another signal (distributed
on TTLTRG1). Phase offset is settable (in degrees) for each
slave module with respect to the master module output.
Phase Offset Resolution (P.O.R.)
360°/ Number of Points
(min. # points = 10)
Phase Offset Range
0° to 360° - 2880/n, where
n = number of points
Phase Accuracy
±[( 20 nS x 360°/PERIOD)
+ P.O.R.]
P.O.R. = phase offset
resolution
PERIOD = 1/(output signal
frequency)
Accuracy specified after
PHAS:LOCK:NULL
command
Jitter
None
Front Panel Indicator LED’s
Astronics Test Systems
Fail
Red - Power-up self-test failure
Access
Amber - Module addressed on
VXIbus
PLL On
Amber - 3152A is locked to
external signal
Output On
Green - Output On/Off
3152A Specifications A-5
3152A User Manual
Publication No. 980867 Rev. A
Front Panel Input/Output Connectors
Main Output
Signal Output (BNC)
Marker/Sync Output
Marker/Sync Output (BNC)
Trigger Input
External
(BNC)
Sample Frequency Input
Sample Frequency Input (BNC)
PM Input
Phase control Input (BNC)
Trigger
Source
Input
Power
VXIbus Rail
Peak
Current
Dynamic
Current
+24 V
< 250 mA
< 250 mA
+12 V
< 100 mA
< 100 mA
+5 V
<3A
< 150 mA
-5.2 V
<2A
< 150 mA
-12V
< 100 mA
< 100 mA
-24V
< 250 mA
< 150 mA
-2V
n/a
n/a
Maximum Total Module Power
< 45 W
Self-Test Fault Coverage
Fault Coverage (%)
90%
EMC
3152A Specifications A-6
Radiated Emissions (Close Field)
VXIbus B.8.6.3, Rev 1.4
Radiated Susceptibility
VXIbus B.8.6.4, Rev 1.4
Conducted Emissions
VXIbus B.8.7.3, Rev 1.4
Conducted Susceptibility
VXIbus B.8.7.4, Rev 1.4
Astronics Test Systems
Publication No. 980867 Rev. A
3152A User Manual
Mechanical
Dimensions
Per
Astronics
Test
Systems VXIbus corporate
package drawings
Weight
3 lbs. 8 oz. (1.6 kg)
Airflow (for 10oC rise)
3.7 I/S
Pressure (for 10oC rise)
0.5 mm H20
Environmental
Operating Temperature
0o C - 55o C
Storage Temperature
-40oC - +70oC
Humidity (non-condensing)
11o C - 30o C 95% +5%
31o C - 40o C 75% +5%
41o C - 50o C 45% +5%
Altitude
Operating
10000 ft
Storage
15000ft
Vibration
5 - 55 Hz sine (2g at 55
Hz), non-operating
Shock
30g 11 ms half sine pulse,
non-operating
Bench Handling
4”, any face, wooden
surface, non-operating
Safety
Designed to meet IEC
1010-1, UL 3111-1, CSA
22.2 #1010
Workmanship Standards
PCB Assembly
Astronics Test Systems
Conform to IPC-A-610
3152A Specifications A-7
3152A User Manual
Output
Characteristics
Publication No. 980867 Rev. A
Output
Via front panel OUTPUT BNC terminal
Stand-By
Output Normal or Off
Impedance
50Ω ±1%
Protection
Protected against temporary short to case
ground
Glitch Energy
<1 nV-s at 16 Vp-p
Amplitude
20 mV to 32 Vp-p, into open circuit
10 mV to 16 Vp-p, into 50Ω
Resolution
4 digits
Accuracy (1 kHz)
±(1%+20 mV) from 1.610 V to 16.00 V
±(1%+2 mV) from 161.0 mV to 1.600 V
±(1%+200 μV) from 10.00 mV to 160.0 mV
Offset
Dependency
Offset and Amplitude are independently
adjustable within level windows: ±8 V,
±800 mV, and ±80 mV
Range
0 to ±7.190 V within ±8 V window
0 to ±719.0 mV within ±800 mV window
0 to ±71.90 mV within ±80 mV window
Resolution
4 digits
Accuracy
±(1% +1% of amplitude +20 mV) ±8 V
window
±(1% +1% of amplitude +2 mV) ±800 mV
window
±(1% +1% of amplitude +200 μV) ±80mV
window
Filters
50 MHz 7-pole elliptic
25 MHz 7-pole elliptic
20 MHz 7-pole Gaussian
3152A Specifications A-8
Astronics Test Systems
Publication No. 980867 Rev. A
3152A User Manual
Square Wave, Pulse
Standard
Waveforms
Rise/Fall time
7 ns Typical, 10% to 90% of amplitude
Aberration
<5%
SYNC Output
Via front panel SYNC OUT BNC terminal
Level
TTL
Protection
Protected against temporary short-tocase-ground
Frequency Range
Waveform dependent
Source
Internal Synthesizer
Resolution
7 digits
Accuracy
Same as frequency standard
Stability
Same as frequency standard
Sine
Frequency Range
100 μHz to 50 MHz
Distortion
<0.1%, below 100 kHz (2000
points minimum)
Harmonics
<5 MHz, ≤10 Vp-p, -48 dBc
<5 MHz, ≤16 Vp-p, -40 dBc
<10 MHz, ≤10 Vp-p, -40 dBc
<10 MHz, ≤16 Vp-p, -35 dBc
<50 MHz, ≤10 Vp-p, -28 dBc
<50 MHz, ≤16 Vp-p, -20 dBc
Band Flatness
1%, to 1 MHz; 5% to 10 MHz;
15%, to 50 MHz
Programmable Parameters
Astronics Test Systems
Start Phase
0 to 360°
Power (sinex)
1 to 9
3152A Specifications A-9
3152A User Manual
Publication No. 980867 Rev. A
Triangle
Frequency Range
100 μHz to 1 MHz, usable to 10 MHz
Adjustable Parameters
Start Phase
0 to 360°
Power
1 to 9
Square
Frequency Range
100 μHz to 50 MHz
Adjustable Parameters
Duty Cycle
1% to 99.9%
Pulse/Ramp
Frequency Range
100 μHz to 1 MHz
Adjustable Parameters
Delay
0% to 99.9% of period
Rise Time
0% to 99.9% of period
High Time
0% to 99.9% of period
Fall Time
0% to 99.9% of period
Sinc (Sine(x)/x)
Frequency Range
100 μHz to 1 MHz
Adjustable Parameters
Cycles
3152A Specifications A-10
4 to 100 cycles
Astronics Test Systems
Publication No. 980867 Rev. A
3152A User Manual
Gaussian Pulse
Frequency Range
100 μHz to 1 MHz
Adjustable Parameters
Time Constant
1 to 200
Exponential Decaying/Rising Pulse
Frequency Range
100 μHz to 1 MHz
Adjustable Parameters
Time Constant
-100 to 100
DC
Arbitrary
Waveforms
Range
1% to 100% of amplitude
Waveform Memory
512K points
Memory Segmentation
Number of Segments
1 to 4096
Min Segment Size
10 points
Vertical Resolution
12 bits (4096 points)
Sampling Clock
Source
Internal synthesizer, external clock,
ECLTRG0
Range
Astronics Test Systems
Internal
100 mHz to 100 MHz
External
To 100 MHz
Internal Reference
10 MHz, fixed internal crystal clock
frequency
Resolution
7 digits
Accuracy
Same as frequency standard
Stability
Same as frequency standard
3152A Specifications A-11
3152A User Manual
Sequenced
Waveforms
Publication No. 980867 Rev. A
Operation
Permits division of the memory bank
into smaller segments. Segments
may be linked and repeated in userselectable fashion to generate
extremely long waveforms
Sequencer steps
From 0 to 4096
Segment loops
From 0 to 1 million.
Segment Duration
Minimum 100 ns for more than one
loop
Sampling Clock
Source
Internal synthesizer, external clock,
ECLTRG0
Range
Swept Waveforms
3152A Specifications A-12
Internal
100 mHz to 100 MHz
External
To 100 MHz
Internal Reference
10 MHz, fixed internal crystal clock
frequency
Resolution
7 digits
Accuracy
Same as frequency standard
Stability
Same as frequency standard
Operation
Utilizes the 3152A’s sequencer and
waveform memory to implement a
frequency sweep from one frequency
to another. Note: Sweep mode is
volatile in that any arbitrary
waveforms or sequences stored in
memory are deleted when sweep is
invoked.
Astronics Test Systems
Publication No. 980867 Rev. A
3152A User Manual
Sweep Parameters
Waveforms
Sine, square or triangle
Sweep Spacing
Linear or log
Sweep Direction
Up or down
Sweep Duration
.01 to 1000s
Sweep Frequency Range
1mHz to 10MHz
Discrete Sweep Steps
10 to 1000
Trigger Modes
Same as for sequenced
mode
Sampling Clock
Source
Internal synthesizer, external
clock, ECLTRG0
Range
PLL Characteristics
Internal
100 mHz to 100 MHz
External
To 100 MHz
Internal Reference
10 MHz, fixed internal crystal
clock frequency
Resolution
7 digits
Accuracy
Same as frequency standard
Stability
Same as frequency standard
Operation
Automatically locks to
external signal
PLL Input Characteristics
Same as TRIG IN
External Lock Frequency Range
Standard Waveforms
500 Hz to 200 kHz; frequency
setting 500 Hz to 200 kHz;
500 Hz to same value as
internal frequency setting,
Astronics Test Systems
3152A Specifications A-13
3152A User Manual
Publication No. 980867 Rev. A
200 kHz to 10 MHz; See
graph below.
Arbitrary Waveforms
3152A Specifications A-14
500 Hz to 100 MHz divided by
number of waveform samples.
See graph below.
Astronics Test Systems
Publication No. 980867 Rev. A
3152A User Manual
Coarse Phase Offset Control
Range
±180°
Resolution
Std. Waveforms
0.72°, frequency setting from
500 Hz to 200 kHz;
360° x frequency (in MHz) /
100, frequency setting from
200 kHz to 10 MHz
Arbitrary Waveforms
Accuracy
360° / waveform samples
5.4 x frequency (in MHz) +
resolution / 2 ±5
Fine Phase Offset Control
Range
±36° around coarse phase
offset setting
Resolution
0.01°
Accuracy
10%, typical
Frequency Counter
Astronics Test Systems
Operation
Made available to the user in
PLL mode only. Frequency
reading is valid only when
PLL ON LED is lit.
Range
Same as External Lock
Frequency Range above
Resolution
4 digits
3152A Specifications A-15
3152A User Manual
PM Characteristics
Publication No. 980867 Rev. A
Operation
External signal offsets phase.
This input is operational in
PLL mode.
Bandwidth
See graph below
PM Input
3152A Specifications A-16
Impedance
100 kΩ, ±5%
Sensitivity
20°/ V, nominal
Accuracy
±30%
Astronics Test Systems
Publication No. 980867 Rev. A
3152A User Manual
Appendix B
TEKTRONIX VX4750 EMULATION
The table below cross-references the Tektronix VX4750 command
set with the 3152A (with TEK option) emulation command set. In
cases where there are limitations or restrictions on the use of the
3152A’s emulation version of a command, these limitations are
listed.
Command
Description
3152A Limitations (if any)
AM
Set external modulation to AM and set the AM modulation index.
Not implemented.
AMPL
Specify the amplitude of the function output.
No restrictions.
AMPL?
Query the amplitude of the function output.
No restrictions.
BRST
Set the burst count.
No restrictions.
BRST?
Query the burst count.
No restrictions.
BUF
Place the module in buffered mode.
No restrictions.
DAT
Load data into the module for use in generating arbitrary waveforms.
No restrictions.
DFREQ
Change the output by the specified amount, phase continously.
No restrictions.
DINT
Disable VXI Interrupt generation.
No restrictions.
DPHAS
Change phase of output by the specified amount, phase continuous.
No restrictions.
ERR?
Query for error conditions.
No restrictions.
FILT
Enable or disable a low pass filter to the output waveform.
VX4750: 12MHz filter selected
3152A: 20MHz filter selected.
FM
Set external modulation to FM and set the FM peak deviation.
Not implemented.
FREQ
Specify the frequency of the output waveform.
No restrictions.
FREQ?
Query the frequency specified in last valid FREQ command.
No restrictions.
FSK
Set external modulation to FSK and set the FSK frequencies.
Not implemented.
FSK?
Query the FSK frequencies.
Not implemented.
IMP
Specify the load impedance connected to the arb.
No restrictions.
Astronics Test Systems
Tektronix VX4750 Emulation B-1
3152A User Manual
Publication No. 980867 Rev. A
INT
Enable VXI event generation from the module.
No restrictions.
IST
Initiate a self-test
3152A error codes are returned.
ISWP
Specify internal linear sweep parameters.
VX4750: 1mHz to 10MHz/7MHz to 25MHz
3152A: 1mHz to 10MHz
LSWP
Specify internal log sweep parameters.
VX4750: 1mHz to 10MHz/7MHz to 25MHz
3152A: 1mHz to 10MHz
NBUF
Place the module in non-buffered mode.
No restrictions.
OFST
Specify the DC offset of the output waveform.
No restrictions.
OFST?
Query the DC offset of the output waveform.
No restrictions.
PHAS
Specify the phase of the output waveform.
No restrictions.
PHAS?
Query the phase of the output waveform.
No restrictions.
PM
Set external modulation to PM and set the max PM phase deviation.
Deviation not settable. Lock signal must be
provided.
PSK
Encode data on the output waveform using PSK modulation.
Not implemented.
PWM
Set external modulation to PWM and set max DC deviation from 50%.
Not implemented.
REFI
Selects a frequency reference source.
No restrictions.
REFO
Selects 10MHz or 33MHz to be output to the REF OUT connector.
Not implemented.
REV?
Return the firmware revision.
Returns the 3152A firmware revision.
RST
Reset the module to its power-up state.
No restrictions.
SPER
Specify the sample period to use to generate arbitrary waveforms.
No restrictions.
SPER?
Query the sample period used to generate arbitrary waveforms.
No restrictions.
SWP OFF
Disable sweep.
No restrictions.
TRGI
Select a trigger input source and polarity of front panel trigger.
No restrictions.
TRGO
Select trigger output and polarity of front panel trigger output.
No restrictions.
TRIG
Trigger the module to output a pre-defined waveform.
No restrictions.
XSWP
Set to external sweep and define start/stop frequencies.
Not implemented.
XSWP?
Query the start/stop frequencies of external sweep.
Not implemented.
WAVE
Specify the type of function generator waveform used.
No restrictions.
Tektronix VX4750 Emulation B-2
Astronics Test Systems
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