HP E1429A/B 2-Channel Digitizer Servcie Manual

HP E1429A/B 2-Channel Digitizer Servcie Manual
Contents
HP E1429A/B 2-Channel Digitizer Service Manual
Edition 1
Click here to Return to HP TS-5400 Systems On-Line Manuals Main Contents
Chapter 1. General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Introduction . . . . . . . . . . . . .
Safety Information . . . . . . . . . .
Warnings . . . . . . . . . . . . .
Cautions . . . . . . . . . . . . .
Product Information . . . . . . . . .
Description . . . . . . . . . . . .
Specifications . . . . . . . . . . .
Serial Numbers . . . . . . . . . .
Options . . . . . . . . . . . . . .
Operating/Storage Environments
Service Programs Disk . . . . . .
Recommended Test Equipment . . .
Inspection / Shipping . . . . . . . .
Initial Inspection . . . . . . . . .
Shipping Guidelines . . . . . . .
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7
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Chapter 2. Setting Calibration Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Introduction . . . . . . . . . . . . . .
Before You Recalibrate... . . . . .
Calibration Information Table . . .
Calibration Security . . . . . . . . . .
Setting Calibration Security Code .
Defeating Calibration Security . . .
Calibration Constants . . . . . . . . .
Reading Calibration Constants . . .
Setting New Calibration Constants .
Protected User Data . . . . . . . . . .
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15
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Chapter 3. Verification Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Introduction . . . . . . . . . .
Test Conditions / Procedures
PerformanceTest Record . .
Verification Test Examples
Functional Verification Tests .
Operation Verification Test . .
Performance Verification Test .
Performance Test Record . . .
Digitizer Test Limits . . . .
Measurement Uncertainty .
Test Accuracy Ratio (TAR)
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HP E1429A/B 2-Channel Digitizer Service Manual
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23
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33
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40
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Contents
1
Chapter 4. Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Introduction . . . . . . . . . . . . . . . . . . . . .
Adjustments Guidelines . . . . . . . . . . . . .
Adjustments Environment . . . . . . . . . . . .
Making Electronic Adjustments . . . . . . . . . . .
Description . . . . . . . . . . . . . . . . . . . .
Equipment Setup . . . . . . . . . . . . . . . . .
Adjustment Procedure . . . . . . . . . . . .
Example Program . . . . . . . . . . . . . . . .
Typical Result . . . . . . . . . . . . . . . . . .
Making Mechanical Adjustments . . . . . . . . . .
AC Common Mode Rejection Ratio Adjustments
Flatness Adjustments . . . . . . . . . . . . . . .
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47
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55
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59
Chapter 5. Replaceable Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Introduction . . . . . .
Exchange Modules . . .
Replaceable Parts Lists
Component Locators . .
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63
63
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65
Chapter 6. Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Introduction . . . . . . . . . . . . .
Equipment Required . . . . . . .
Service Aids . . . . . . . . . . .
Recommended Repair Strategy . . .
TroubleshootingGuidelines . . . . .
Identifying the Problem . . . . .
Making Visual Checks . . . . . .
Testing the Module . . . . . . . .
Disassembly . . . . . . . . . . . . .
Repair / Maintenance Guidelines . .
ESD
Precautions . . . . . . . . . . .
Soldering Printed Circuit Boards .
Post-Repair Safety Checks . . . .
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69
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. . . . . . . . . . . . . . . . . . . . . . . . . . . 74
. . . . . . . . . . . . . . . . . . . . . . . . . . . 74
. . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Appendix A. CALibration Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Command Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Appendix B. Calculating Digitizer Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Introduction . . . . . . . . . . . . . . . . . .
Digitizer Accuracy Calculations . . . . . . . .
DC Voltage Accuracy Equations . . . . . .
Measurement Uncertainty Calculations . . . .
Calculate DCV Measurement Uncertainty
Test Accuracy Ratio (TAR) Calculations . . .
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93
94
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95
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Appendix C. Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Digitizer Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
2
Contents
HP E1429A/B 2-Channel Digitizer Service Manual
What’s in this Manual
Manual Overview
This manual shows how to service the HP E1429A/B 20 MSa/s Digitizers. See the HP E1429A/B User’s
Manual for additional information on installing, configuring, and operating the instrument. Consult the
appropriate mainframe manual for information on configuring and operating the mainframe.
Manual Content
Chap
Title
Content
1
General
Information
Lists basic instrument descriptions, tools and test equipment required for
service, and procedures to inspect and ship the instruments.
2
Setting Calibration
Values
Shows how to read/enter calibration constants and protected user data, and
how to enter a new calibration security code.
3
Verification
Tests
Describes self-tests and functional verification tests for the instruments.
4
Adjustments
Shows how to perform adjustments for the instruments.
5
Replaceable
Parts
Lists part numbers of replaceable parts for the instruments. Also includes
information to order spare parts and to exchange/replace instruments.
6
Service
Procedures to aid in fault isolation and repair of the instruments.
A
CALibration
Commands
Summarizes the CALibration subsystem commands for the instruments.
B
Calculating
Digitizer Accuracy
Shows how to calculate digitizer accuracy, source measurement uncertainty,
and test accuracy ratio (TAR) for the digitizers.
C
Error Messages
Lists error messages associated with performance verification tests and
adjustments.
What’s in this Manual
3
HP 75000 Series C Service Documentation
Suggested Sequence to Use Manuals
Manual Descriptions
Title
Description
Series C Installation and
Getting Started Guide
Step-by-step instructions for all aspects of plug-in module, mainframe, and command
module installation. Also contains programming information and examples.
Mainframe User’s Manual
Information to prepare the mainframe and to install plug-in modules.
Command Module User’s
Manual
Programming information for the command module and general programming
information for instruments installed in the mainframe.
Command Module Service
Manual
Command module service information. Includes information and procedures for
functional verification, operation verification, performance verification,
troubleshooting, and repair.
Plug-In Module User’s
Manuals
Plug-in module programming and configuration information. Contains programming
examples and SCPI command reference for the module.
Plug-In Module Service
Manuals
Plug-in module service information. Depending on the module, includes information
and procedures for functional verification, operation verification, performance
verification, adjustment, troubleshooting, and repair.
Suggested Sequence to Use Manuals
4
Manual Comment Sheet
HP E1429A/B 2-Channel 20 MSa/s Digitizers Service Manual
Manual Part Number E1429-90010
Edition 1 (September 1993)
You can help us improve our manuals by sharing your comments and suggestions. Please complete this
questionnaire after becoming familiar with the manual and then return it to us. In appreciation of your time,
we will enter your name in a quarterly drawing for a Hewlett-Packard calculator.
Please describe the system configuration, programming language, and plug-in modules you are using
with this product.
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
Please pencil-in one circle for each statement below as it applies to this documentation:
Disagree
The manual is well organized
Instructions are easy to understand
The manual is clearly written
Examples are clear and useful
Manual contains enough examples
Illustrations are clear and helpful
Manual meets my expectations
O
O
O
O
O
O
O
Agree
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
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Chapter 1
General Information
Introduction
NOTE
This service manual contains information to test, troubleshoot, and repair
the HP E1429A/B 2-Channel 20 MSa/s Digitizers (digitizers). The HP
E1429A/B digitizers are identical, except that the HP E1429B adds a Local
Bus capability not available in the HP E1429A. Figure 1-1 shows a typical
HP E1429A/B digitizer.
See "Inspection/Shipping" if you need to perform incoming (initial)
inspection of your digitizer. Before you use the digitizer, see Chapter 2 Setting Calibration Values for guidelines to record initial calibration data
values.
Figure 1-1. HP E1429A/B Digitizers
Chapter 1
General Information
7
Safety
Information
The HP E1429A/B digitizers are Safety Class I instruments that are
provided with a protective earth terminal when installed in the mainframe.
Check the mainframe and all related documentation for safety markings and
instructions before operating or servicing a digitizer.
See the WARNINGS page (page iii) for a summary of safety information.
Safety information to test and service the HP E1429A/B digitizers follows
and is also found throughout this manual.
Warnings
WARNING
Follow the WARNINGS listed to avoid possible injury to yourself or others
when operating, repairing, or servicing a digitizer.
SERVICE-TRAINED PERSONNEL ONLY. The information in this
manual is for service-trained personnel who are familiar with
electronic circuitry and are aware of the hazards involved. To
avoid personal injury or damage to the instrument, do not
perform procedures in this manual or do any servicing unless
you are qualified to do so.
CHECK MAINFRAME POWER SETTINGS. Before applying
power, verify that the mainframe setting matches the line
voltage and the correct fuse is installed. An uninterruptible
safety earth ground must be provided from the main power
source to the supplied power cord set.
GROUNDING REQUIREMENTS. Interruption of the protective
(grounding) conductor (inside or outside the mainframe) or
disconnecting the protective earth terminal will cause a
potential shock hazard that could result in personal injury.
(Grounding one conductor of a two-conductor outlet is not
sufficient protection.)
IMPAIRED PROTECTION. Whenever it is likely that instrument
protection has been impaired, the mainframe must be made
inoperative and be secured against any unintended operation.
REMOVE POWER IF POSSIBLE. Some procedures in this
manual may be performed with power supplied to the
mainframe while protective covers are removed. Energy
available at many points may, if contacted, result in personal
injury. (If service can be performed without power applied,
remove the power.)
8
General Information
Chapter 1
WARNING
USING AUTOTRANSFORMERS. If the mainframe is to be
energized via an autotransformer (for voltage reduction) make
sure the common terminal is connected to neutral (that is, the
grounded side of the main’s supply).
USE PROPER FUSES. For continued protection against fire
hazard, replace the line fuse(s) only with fuses of the same
current rating and type (such as normal blow, time delay, etc.).
Do not use repaired fuses or short-circuited fuseholders.
Cautions
CAUTION
Follow the CAUTIONS listed to avoid possible damage to the equipment
when performing instrument operation, service, or repair.
MAXIMUM INPUT VOLTAGE/CURRENT. To avoid possible
damage to the instrument, maximum input voltage (terminal to
terminal and terminal to chassis) is ± 42 V peak.
STATIC ELECTRICITY. Static electricity is a major cause of
component failure. To prevent damage to the electrical components
in the digitizers, observe anti-static techniques when removing a
digitizer from the mainframe or when handling a digitizer. Also, be
sure to tighten the front panel screws when installing an HP E1429A/B
in a mainframe slot.
Product
Information
This section summarizes information for the HP E1429A/B digitizers in the
following areas:
•
•
•
•
•
•
Description
Chapter 1
digitizer description
digitizer specifications
digitizer serial number information
digitizer options
digitizer environmental limits
service programs disk
The HP E1429A/B digitizers are VXIbus C-Size, message-based servant
and register-based (A24) slaves, with A16/A24, D8/D16, and D32 read
capability. The digitizers can operate in a C-Size VXIbus mainframe using
an HP E1406A Command Module and Standard Commands for
Programmable Instruments (SCPI). The digitizers also support
register-based programming.
General Information
9
The digitizers can sample input transient waveforms at sample rates of
0.05 to 20 MSa/s in 1-2-5 sequence. Each of the two channels includes a
differential and single-ended input. The single-ended inputs can be
programmed for 50 Ω or 75 Ω. Battery-backed memory allows 512 K
readings per channel. Arm and trigger signals can be generated internally or
received from a variety of sources on the VXI backplane or the faceplate
BNCs. Self-tests (power-on and *TST?) are available to verify digitizer
operation.
Specifications
Serial Numbers
See Appendix A - Specifications in the HP E1429A/B User’s Manual for HP
E1429A/B digitizer specifications. These specifications are the performance
standards or limits against which the instrument may be tested.
Figure 1-2 shows Hewlett-Packard serial number structure. HP E1429A/B
digitizers covered by this manual are identified by the serial number
prefixes listed on the title page.
Figure 1-2. Hewlett-Packard Serial Numbers
Options
10
General Information
There are no options for the HP E1429A/B digitizers. However, the HP
E1429B digitizer includes a Local Bus that is not available in the HP
E1429A digitizer.
Chapter 1
Operating/Storage
Environments
The HP E1429A/B digitizers should be stored in a clean, dry environment.
The following table shows recommended operating/shipping environments
for the digitizers.
Operating/Shipping Environments
Temperature
Service Programs
Disk
Relative Humidity
Operating Environment
0oC to +55oC
<65% (0oC to +40oC)
Storage/Shipment
-40oC to +75oC
<65% (0oC to +40oC)
An HP E1429A/B Service Programs disk is shipped with this manual. The
programs on the disk are in LIF format, with the program filename shown
in line 10 of each program. To run a program, load the disk in the disk
drive, select the disk drive as the primary drive, type LOAD "filename" and
press RUN. For example, to run the HP E1429A/B Self-Test (Test F-1 in
Chapter 3), load the disk and type LOAD "SELFTEST". Then, press RUN
to run the program. The following table summarizes Service Programs disk
contents.
HP E1429A/B Service Programs
Chap
2
3
4
Category
filename
Description
Calibration Security
CAL_CODE
Allows user to set new calibration code.
Calibration Constants
READ_CAL
Reads the existing calibration count and constants.
LOAD_CAL
Allows user to enter new calibration constants.
Protected User Data
PRO_DATA
Allows user to enter data into protected user data memory.
Functional Verification
Tests
SELFTEST
Performs a digitizer self-test.
DC_CMRR
Checks DC common mode rejection ratio for 10 Vdc input.
AC_CMRR
Checks AC common mode rejection ratio for 20 Vac input.
Performance
Verification Test
PERFTEST
Measures DCV inputs for all channels, and checks inputs
against specification limits.
Electronic Adjustments
ADJUST
Performs A/D converter delay constant adjustment, zero offset
adjustment, and channel gain adjustments for chan 1 and 2.
Mechanical Adjustments
AC_ADJS
Allows user to minimize the differential channel voltage offset
by adjusting the AC CMRR to maximum.
FLATNESS
Allows user to adjust each channel for maximum flat
frequency response (maximum flatness).
Chapter 1
General Information
11
Recommended
Test Equipment
See Table 1-1 for test equipment recommended to test and service the HP
E1429A/B digitizers. Essential requirements for each piece of test
equipment are listed in the Requirements column. You may substitute other
equipment if it meets the requirements in Table 1-1.
Table 1-1. Recommended Test Equipment
Instrument
Requirements
Recommended
Model
Use*
Controller,
HP-IB
HP-IB compatibility as defined by IEEE
Standard 488-1987 and the identical
ANSI Standard MC1.1: SH1, AH1, T2,
TE0, L2, LE0, SR0, RL0, PP0, DC0,
DT0, and C1, 2, 3, 4, 5
HP 9000 Series 300
F,P
Mainframe
Compatible with HP E1405B or
HP E1406A
HP E1400B, HP E1400T,
or HP E1401A (each
mainframe requires HP
E1405B or E1406A
Command Module)
F,P
DC Source
Voltage range: ± 100 Vdc
Datron 4708, Option 10
F,P,A
Tools
Alignment Tool
Adjustment Tool
HP P/N 8710-0630 (Supplied)
HP P/N 8710-2106 (Supplied)
A
*A = Adjustments, F = Functional Verification Tests, P = Performance Verification Tests,
T = Troubleshooting
Inspection /
Shipping
12
This section shows initial (incoming) inspection and shipping guidelines for
the HP E1429A/B digitizers.
Initial Inspection
Use the steps in Figure 1-3 as guidelines to perform initial (incoming)
inspection of the HP E1429A/B digitizers. After the digitizer passes its
initial inspection, see Chapter 2 - Setting Calibration Values to set a new
calibration security code and record initial calibration constants.
WARNING
To avoid possible hazardous electrical shock, do not perform
electrical tests if there are signs of shipping damage to the
shipping container or to the instrument.
General Information
Chapter 1
Figure 1-3. Initial (Incoming) Inspection Guidelines
Chapter 1
General Information
13
Shipping Guidelines
Follow the steps in Figure 1-4 to return an HP E1429A/B digitizer to a
Hewlett-Packard Sales and Support Office or to a Service Center.
1
Prepare the module
• Remove user wiring from module
• Attach tag to module that identifies:
- Owner/ Model Number/Serial Number
- Service Required
• Place tagged module in anti-static bag
2
Package the module
• Place packaged module in shipping carton*
• Place 75 to 100 mm (3 to 4 inches) of shockabsorbing material around the module
• Seal the shipping carton securely
• Mark the shipping carton FRAGILE
3
Ship the module to Hewlett-Packard**
• Place address label on shipping carton
• Send carton to Hewlett-Packard
Figure 1-4. Recommended Shipping Guidelines
14
General Information
Chapter 1
Chapter 2
Setting Calibration Values
Introduction
This chapter shows how to read existing calibration values for your digitizer
and how to change these values as required. It includes:
• setting/defeating calibration security
• reading/setting calibration constants
• reading/setting protected user data
Before You
Recalibrate...
Calibration
Information Table
Chapter 2
Before you recalibrate your digitizer, you may want to set a new calibration
security code and record the initial calibration count and calibration
constants. See "Setting Calibration Security Code" to set a new calibration
security code. See "Reading Calibration Constants" to read the initial
calibration count and constants.
Table 2-1, HP E1429A/B Digitizers Calibration Information, on the
following page, is a form you can copy and use to record the current value
of the calibration count, calibration constants for each channel, and your
current calibration security code. We recommend that you use this form
to record the initial values before you use the digitizer, and whenever you
change values.
Setting Calibration Values
15
Table 2-1. HP E1429A/B Digitizers Calibration Information Table
General Information
Digitizer Serial
Number:_________________________
Calibration Security Code:
________________________
Date/Time:
__________________________________
Calibration Count:
______________________________
Calibration Constants Values
Index
0
Contents
offset for 1.0230V range
Ch1
Ch2
Index
____
____
31
Contents
Ch1
Ch2
gain lsb: s/e .5115V range
____
____
offset: diff .10230V range
____
____
1
A to D chip internal setting
____
____
32
2
A to D chip internal setting
____
____
33
gain msb: diff .10230V range
____
____
3
A to D chip internal setting
____
____
34
gain lsb: diff .10230V range
____
____
4
A to D chip internal setting
____
____
35
offset: diff .2046V range
____
____
5
A to D chip internal setting
____
____
36
gain msb: diff .2046V range
____
____
6
linearity bit 5 right
____
____
37
gain lsb: diff .2046V range
____
____
7
linearity bit 5 left
____
____
38
offset: diff .51175V range
____
____
8
linearity bit 6 right
____
____
39
gain msb: diff .5115V range
____
____
9
linearity bit 6 left
____
____
40
gain lsb: diff .5115V range
____
____
41
offset: diff 1.0230V range
____
____
10
linearity bit 7 right
____
____
11
linearity bit 7 left
____
____
42
gain msb: diff 1.0230V range
____
____
12
linearity bit 8 right
____
____
43
gain lsb: diff 1.0230V range
____
____
13
linearity bit 8 leftt
____
____
44
offset: diff 2.046V range
____
____
14
linearity bit 9 right
____
____
45
gain msb: diff 2.046V range
____
____
15
linearity bit 9 left
____
____
46
gain lsb: diff 2.046V range
____
____
16
linearity bit 10 right
____
____
47
offset: diff 5.115V range
____
____
17
linearity bit 10 left
____
____
48
gain msb: diff 5.115V range
____
____
18
gain msb
____
____
49
gain lsb: diff 5.115V range
____
____
offset: diff 10.230V range
____
____
19
gain lsb
____
____
50
20
conversion delay adjust
____
____
51
gain msb: diff 10.230V range
____
____
21
trigger level negative
____
____
52
gain lsb: diff 10.230V range
____
____
22
trigger level positive
____
____
53
offset: diff 20.46V range
____
____
23
offset: s/e .10230V range
____
____
54
gain msb: diff 20.46V range
____
____
24
gain msb: s/e .10230V range
____
____
55
gain lsb: diff 20.46V range
____
____
25
gain lsb: s/e .10230V range
____
____
56
offset: diff 51.15V range
____
____
26
offset: s/e .2046V range
____
____
57
gain msb: diff 51.15V range
____
____
27
gain msb: s/e .2046V range
____
____
58
gain lsb: diff 51.15V range
____
____
____
____
28
gain lsb: s/e .2046V range
____
____
59
offset: diff 102.30V range
29
offset: s/e .5115V range
____
____
60
gain msb: diff 102.30V range
____
____
30
gain msb: s/e .5115V range
____
____
61
gain lsb: diff 102.30V range
____
____
s/e = single-ended input (Ports 1 and 2), diff = differential ports (Ports 3 and 4)
16
Setting Calibration Values
Chapter 2
Calibration
Security
Setting Calibration
Security Code
NOTE
This section shows how to set a calibration security code for your digitizer
and how to defeat calibration security, if required.
When the HP E1429A/B digitizer was shipped from the factory, the
calibration security code was set to E1429. Before using the digitizer and,
as necessary, we recommend you change the calibration security code to
prevent unauthorized or accidental calibration. Record the new security
code (on Table 2-1, if desired) and store the result in a secure place.
If you do not know the current calibration code but want to disable
calibration security, you must disassemble the instrument and reset
jumpers. See "Defeating Calibration Security" for procedures if this is
required.
Example: Setting New Calibration Security Code
An example program follows to allow you to set a new calibration security
code. Note that the new calibration security code applies to both channel 1
and channel 2. If the existing calibration security code is not E1429, change
line 40 to reflect the new code. For example, if the desired new code is
"NEW_CODE", change line 40 to: 40 OUTPUT @Dig;"CAL:SEC:STAT
OFF,NEW_CODE".
10!
RE-STORE "CAL_CODE"
20
!
30
ASSIGN @Dig TO 70905
40
OUTPUT @Dig;"CAL:SEC:STAT OFF,E1429"
!Assign @Dig to 70905
!Disable cal security on both channels,
assuming factory-set security code
50 Retry: !
60
CLEAR SCREEN
70
INPUT " Enter new calibration security code ",New_code$
80
PRINT "New calibration code = ";New_code$
90
INPUT " Is this code correct (Y/N)? ",Ans$
!User enters new security code
!Display new code
!User verification of new code
100 IF Ans$="Y" OR Ans$="y" THEN
110
GOTO Correct
120 ELSE
130
GOTO Retry
!Reenter security code if incorrect
140 END IF
150 Correct: !
160
OUTPUT @Dig;"CAL:SEC:CODE ";New_code$
170
OUTPUT @Dig;"CAL:SEC:STAT ON"
!New security code stored
!Reenable cal security on both channels
180 END
Chapter 2
Setting Calibration Values
17
Defeating
Calibration Security
If you do not know the current calibration security code, you can defeat the
calibration security feature by disassembling the digitizer and moving the
jumper on connector J201 (see Figure 2-1) to the unsecured position
(left-most pins). See Chapter 6 - Service for disassembly instructions.
To prevent accidental or unauthorized calibration, move the jumper back to
the secured position (right-most pins) as soon as the security code has been
set to the desired value. To do this, you will need to move the jumper to the
unsecured position, reassemble the instrument, enter the new <code> value,
disassemble the instrument again, set the jumper back to the secured
position, and reassemble the instrument.
Figure 2-1. Defeating Calibration Security
18
Setting Calibration Values
Chapter 2
Calibration
Constants
Reading Calibration
Constants
This section shows how to read existing calibration constants and
calibration count, and how to enter new calibration constants as required.
Before using the digitizer, we suggest you record the initial calibration
count and calibration constants on Table 2-1 and store the results in a secure
place. Note that the calibration count applies to both channels 1 and 2, so a
single count is returned for the digitizer. The calibration constants, however,
are unique to each channel.
Example: Reading Calibration Count and Constants
An example program follows to read the existing calibration count and
calibration constants for channels 1 and 2.
10
!RE-STORE "READ_CAL"
20
ASSIGN @Dig TO 70905
30
!
40
! ----------------------- Read calibration count -------------------
50
!
60
OUTPUT @Dig;"CAL:COUN?"
70
ENTER @Dig;Cal_count
80
!
90
! ---------- Read channel 1 calibration constants ------------
!Assign @Dig to 70905
!Query calibration count
!Enter calibration count
100 !
110 DIM Ndig$[1],Count$[9]
120 ASSIGN @Digu TO 70905;FORMAT OFF
130 OUTPUT @Dig;"FORM PACK"
140 OUTPUT @Dig;"CAL1:DATA?"
150 ENTER @Digu USING "#,X,K,K";Ndig$;Count$[1;VAL(Ndig$)]
160 ALLOCATE INTEGER Cal1_data(1:VAL(Count$)/2)
170 ENTER @Digu;Cal1_data(*)
180 ENTER @Dig USING "B";Line_feed
!Dimension parameters for header
!Turn FORMAT OFF for array data
!Set PACKed format
!Query calibration data
!Strip off header preceeding data
!Allocate array to hold channel 1 data
!Read channel 1 calibration constants
!Strip off leftover line feed
190 !
200 ! ------ Read channel 2 calibration constants ------------210 !
220 OUTPUT @Dig;"CAL2:DATA?"
230 ENTER @Digu USING "#,X,K,K";Ndig$;Count$[1;VAL(Ndig$)]
240 ALLOCATE INTEGER Cal2_data(1:VAL(Count$)/2)
250 ENTER @Digu;Cal2_data(*)
260 ENTER @Dig USING "B";Line_feed
!Query calibration data
!Strip off header preceeding data
!Allocate array to hold channel 2 data
!Read channel 2 calibration constants
!Strip off leftover line feed
(continued on next page)
Chapter 2
Setting Calibration Values
19
270 !
280 ! ------- Display calibration count/constants ---------290 !
300 CLEAR SCREEN
310 PRINT "HP E1429A/B Digitizer Calibration Count/Constants"
320 PRINT
330 PRINT "Date:";DATE$(TIMEDATE)
340 PRINT "Time:";TIME$(TIMEDATE)
350 PRINT "Calibration Count:";Cal_count
360 PRINT
370 PRINT "Channel 1 Calibration Constants"
380 PRINT
390 PRINT Cal1_data(*)
400 PRINT
410 PRINT "Channel 2 Calibration Constants"
420 PRINT
430 PRINT Cal2_data(*)
440 END
A typical result follows, where channel 1 index 0 in Table 2-1 = -147, index
1 = 939,..., index 61 = -307,
and channel 2 index 0 = -248, index 1 = 939,..., index 61 = -310.
HP E1429A/B Digitizer Calibration Count/Constants
Date: 24 Sep 1993
Time: 10:15:23
Calibration Count: 3
Channel 1 Calibration Constants
-147
-30
-42
397
-343
-306
397
-281
939
58
43
-300
385
-277
-300
395
533
21
387
-306
-312
390
-281
-302
336
88
-310
407
-310
-307
391
-281
-819
-15
117
-290
387
-279
-306
390
-450
57
2047
-290
-310
393
-280
-307
-21
21
-2048
413
-293
-304
392
59
99
-328
-284
391
-279
-305
533
21
387
-306
-312
390
-281
-302
336
88
-310
407
-310
-307
391
-281
-819
-15
117
-290
387
-279
-306
390
-450
57
2047
-290
-310
393
-280
-310
-21
21
-2048
413
-293
-304
392
59
99
-328
-284
391
-279
-305
Channel 2 Calibration Constants
-248
-30
-42
397
-343
-306
397
-281
20
939
58
43
-300
385
-277
-300
395
Setting Calibration Values
Chapter 2
Setting New
Calibration
Constants
If you need to set new calibration constants (or reset existing calibration
constants), you can use the following program. The new calibration
constants take effect immediately, but are not saved to nonvolatile
calibration memory unless the CAL:STOR command is executed.
Example: Setting New Calibration Constants
The following program loads 62 calibration constants into the digitizer, and
then stores the new constants to nonvolatile calibration RAM. If you want
to verify that the new constants are stored, you can run the "READ_CAL"
program in "Reading Calibration Constants". Substitute the values of your
calibration constants for the example values listed in lines 120 - 160.
10
!RE-STORE "LOAD_CAL"
20
!
30
! ----------------------- Initial Setup -----------------------
40
!
50
ASSIGN @Dig TO 70905
60
ASSIGN @Digu TO 70905;FORMAT OFF
70
INTEGER Array(0:61)
80
INPUT " Enter channel number (1 or 2) for constants ",Chan
90
!
!Assign @Dig to 70905
!Turn FORMAT OFF for array data
!Dimension array for cal constants
100 ! --------------- Input new calibration constants -------------110 !
120 DATA -147,939,533,336,-819,-450,-21,59,-30,58,21,88,-15,57,21
130 DATA 99,-42,43,387,-310,117,2047,-2048,-328,397,-300,-306,407
140 DATA -290,-290,413,-284,-343,385,-312,-310,387,-310,-293,391
150 DATA -306,-277,390,-307,-279,393,-304,-279,397,-300,-281,391
160 DATA -306,-280,392,-305,-281,395,-302,-281,390,-307
170 READ Array(*)
!Read new calibration constants
180 !
190 ! --------- Enter/store calibration constants --------------------------200 !
!Set PACKed format
!Turn calibration security OFF,
assuming factory-set code of E1429
OUTPUT @Dig;"CAL"&VAL$(Chan)&":STOR:AUTO OFF"
!Disable storage of cal constants
OUTPUT @Dig USING "#,K";"CAL"&VAL$(Chan)&":DATA #3124" !Specify 124 bytes (62 constants)
OUTPUT @Digu;Array(*),CHR$(10),END
!Send array of calibration constants
OUTPUT @Dig;"CAL"&VAL$(Chan)&":STOR"
!Store new calibration constants
OUTPUT @Dig;"CAL:SEC:STAT ON"
!Turn calibration security ON
210 OUTPUT @Dig;"FORM PACK"
220 OUTPUT @Dig;"CAL"&VAL$(Chan)&":SEC:STAT OFF,E1429"
230
240
250
260
270
280 END
Chapter 2
Setting Calibration Values
21
Protected User
Data
This section shows how to read existing protected user data, and how to
enter new protected user data into memory as required. As desired, you
can enter and read information in "protected user data" memory.
Since calibration security must be OFF to write to this memory area, you
can use *PUD to store sensitive information such as date of last calibration,
the number of the last calibration, etc. *PUD? reads the current protected
user data in IEEE-488.2 definite length block format. *PUD? returns the
information regardless of the state of calibration security.
Example: Reading/Entering Protected User Data
An example program follows to enter data into protected user data memory
and to read the result. In this program, you must enter the proper header and
the header must account for all characters and spaces. For example, in line
90 "Last Calibration: 17 Feb 1994" has 29 spaces and characters, so the
header is #229. Use the current calibration security code in line 80.
10
!RE-STORE "PRO_DATA"
20
!
30
ASSIGN @Dig TO 70905
40
50
DIM Pro_data$[256]
!
60
70
!------------------Enter/read protected user data -------------------!
80
OUTPUT @Dig;"CAL:SEC:STAT OFF,E1429"
90
OUTPUT @Dig;"*PUD #229Last Calibration: 17 Feb 1994"
!Assign @Dig to 70905
100 OUTPUT @Dig;"CAL:SEC:STAT ON"
110 OUTPUT @Dig;"*PUD?"
120 ENTER @Dig;Pro_data$
!Turn calibration security OFF
!Enter desired message/information
!Turn calibration security ON
!Read protected user data
!Enter data (includes header)
130 !
140 !----------------------Display results/-----------------------------------150 !
160 CLEAR SCREEN
170 PRINT "HP E1429A/B Digitizers - Protected User Data"
180 PRINT
190 PRINT Pro_data$[POS(Pro_data$,CHR$(32));LEN(Pro_data$)]
200 END
A typical return follows.
HP E1429A/B Digitizers - Protected User Data
Last Calibration: 17 Feb 1994
22
Setting Calibration Values
Chapter 2
Chapter 3
Verification Tests
Introduction
The three levels of test procedures described in this chapter are used to
verify that the HP E1429A/B digitizers:
• are functional (Functional Verification)
• meet selected testable specifications (Operation Verification)
• meet all testable specifications (Performance Verification)
WARNING
Test Conditions /
Procedures
Do not perform any of the following verification tests unless
you are a qualified, service-trained technician and have read
the WARNINGS and CAUTIONS in Chapter 1.
See Table 1-1 for test equipment requirements. You should complete the
performance verification tests at least once a year. For heavy use or severe
operating environments, perform the tests more often. The temperature
should be between 18oC and 28oC.
The verification tests assume that the person performing the tests
understands how to operate the mainframe, the amplifier, and specified test
equipment. The test procedures do not specify equipment settings for test
equipment, except in general terms. It is assumed that a qualified,
service-trained technician will select and connect the cables, adapters, and
probes required for the test.
PerformanceTest
Record
The results of each performance verification test may be recorded in Table
3-1, HP E1429A/B Digitizers Performance Test Record. This form can be
copied, if desired.
Verification Test
Examples
Each verification test procedure includes an example program that performs
the test. All example programs assume the following:
• Controller is an HP 9000 Series 200/300 computer
• Programming language is HP BASIC
• Digitizer address is 70905 (logical address is 40)
Chapter 3
Verification Tests
23
Functional
Verification
Tests
NOTE
The purpose of the functional verification tests is to verify that the HP
E1429A/B digitizer is functioning properly. The following table lists
functional verification tests for the HP E1429A/B digitizers.
For a quick functional verification test of the HP E1429A/B digitizers,
do only Test F-1: Self-Test.
HP E1429A/B Digitizers Functional Verification Tests
Test
24
Verification Tests
Descripton
Test Passes if:
F-1: Self-Test
Test module functions
using *TST?
*TST? returns "0"
F2: DC Common Mode
Rejection Ratio (DC CMRR)
Check DC CMRR for 10
Vdc input
DC CMRR ≥ 68 dB
F3: AC Common Mode
Rejection Ratio (AC CMRR)
Check AC CMRR for 20
Vac PP input @ 1MHz
AC CMRR ≥ 60 dB
Chapter 3
Test F-1: Self-Test
Description
The self-test provides a high degree of confidence that the HP E1429A/B
digitizer is functional. The test uses *TST? to self-test the digitizer and
takes about 30 seconds to complete. During the test sequence:
• First, all front panel LEDs should turn ON
• Next, the relays should activate
• Then, the 50 Ω LEDs should turn ON
Test Procedure
1. Execute the self-test:
*TST?
Self-test command
2. Read the result. A "0" indicates that the test passed. If a failure
occurs, the instrument returns a "1" and generates an error
message that identifies the cause of the failure.
NOTE
Example Program
If self-test fails, do the Electronic Adjustments in Chapter 4 - Adjustments
and rerun the self-test. If the test still fails, replace the instrument.
This program performs a self-test on the digitizer.
10
!RE-STORE "SELFTEST"
20
DIM Err_msg$[255]
30
ASSIGN @Dig TO 70905
40
OUTPUT @Dig;"*TST?"
50
ENTER @Dig;Result
60
IF Result <>0 THEN
70
PRINT "SELF-TEST FAILED"
80
PRINT
90
REPEAT
100
OUTPUT @Dig;"SYST:ERR?"
110
ENTER @Dig;Code,Err_msg$
120
130
140
150
PRINT Code,Err_msg$
UNTIL Code=0
ELSE
PRINT "SELF-TEST PASSED"
160
END IF
170
END
Chapter 3
!Assign @Dig to digitizer
!Send self-test command
Verification Tests
25
Test F-2: DC CMRR Test
Description
This test checks the DC common mode rejection ratio (DC CMRR) for the
differential inputs of the digitizer. There are two steps to this test.
First, an input of 0.0 Vdc is applied simultaneously to the HI and LO inputs
of (differential) port 3 or port 4, with the digitizer set to the 0.1V range.
The differential input value (difference between the HI and LO port
readings) is measured by the digitizer (we’ll call this value Vos).
Next, an input of 10.0 Vdc is applied simultaneously to the HI and LO
inputs of (differential) port 3 or port 4, with the digitizer set to the 0.1V
range. The differential input value (difference between the HI and LO
port readings) is measured by the digitizer (we’ll call this value Vavg).
The DC CMRR is then computed using the following formula. The result
should be a DC CMRR >68 dB.
10.0
dc_cmrr = 20 log 10
| Vavg − Vos |
NOTE
Equipment Setup
WARNING
26
Verification Tests
If the DC CMRR test fails (CMRR ≤ 68 dB), perform the Electronic
Adjustments in Chapter 4 - Adjustments and rerun the test. If the test
still fails, replace the digitizer.
• Set up the equipment as shown in Figure 3-1
• Set DC source output to 0.0 Vdc
The DC Standard (Datron 4708, Option 10) can produce
dangerous voltages that are present on the terminals. Do not
touch the front (or rear) panel terminals unless you are sure
no dangerous voltage is present.
Chapter 3
Figure 3-1. DC CMRR Test Setup
Test Procedure
1. Make Channel 1 measurements for 0 Vdc input:
Set Datron output to 0.0 Vdc.
MEAS1:ARR:VOLT? (100),0.1,DEF,(@3)
Set digitizer for ch 1 meas,
100 readings, 0.1V range,
input on port 3
ENTER statement;A
Store 100 readings in data
array A
Vos = SUM(A)/100
Compute average value for
0.0 Vdc input (Vos)
2. Make Channel 1 measurements for 10.0 Vdc input:
Set Datron output to 10.0 Vdc.
MEAS1:ARR:VOLT? (100),0.1,DEF,(@3)
Set digitizer for ch 1 meas,
100 readings, 0.1V range,
input on port 3
ENTER statement;B
Store 100 readings in data
array B
Vavg = SUM(B)/100
Compute average value for
10V input (Vavg)
3. Compute DC CMRR
Cmrr = 20*LOG10 (10.0/(| Vavg_Vos |))
Calculate DC CMRR
4. Repeat the test for Channel 2 Vdc input
Make connections to port 4 HI and LO
MEAS2:ARR:VOLT? (100),0.1,DEF,(@4)
Chapter 3
Set digitizer for ch 2 meas,
100 readings, 0.1V range,
input on port 4
Verification Tests
27
Example Program
This program makes 100 readings of the offset voltage on channels 1 and 2
and displays the DC Common Mode Rejection Ratio (DC CMRR) for each
channel.
10!
RE-STORE "DC_CMRR"
20
!
30
! --------------------- Initial Setup ---------------------
40
!
50
ASSIGN @Dig TO 70905
60
DIM A(1:100), B(1:100)
70
FOR Chan=1 TO 2
!Assign @Dig to digitizer address
!Dimension arrays for measured values
!Loop for channels 1 and 2
80
PRINT "Channel";Chan;"DC Common Mode Rejection Ratio Test"
90
PRINT
100
PRINT "1. Connect DC source to Port";Chan+2;"HI and LO"
110
PRINT "2. Set DC source output to 10.0 Vdc"
120
DISP " Press Continue when ready "
130
PAUSE
140
CLEAR SCREEN
150
!
160
! -------------------- Compute Avg Value for 0V Input (Vos) -----------------
170
!
180 OUTPUT @Dig;"MEAS"&VAL$(Chan)&":ARR:VOLT? (100),
0.1,DEF,(@"&VAL$(Chan+2)&")"
190
ENTER @Dig;A(*)
200
Vos=ABS(SUM(A)/100)
210
!Measure differential input on channel
1 or 2
!Enter results
!Find avg value of 100 (0V) inputs
PRINT "Set DC source output to 10.0 Vdc"
220
DISP " Press Continue when ready "
230
PAUSE
240
CLEAR SCREEN
250
!
260
! -------------------- Compute Avg Value for 10V Input (Vavg) -----------------
270
!
280 OUTPUT @Dig;"MEAS"&VAL$(Chan)&":ARR:VOLT? (100),
0.1,DEF,(@"&VAL$(Chan+2)&")"
!Measure differential input on channel
1 or 2
!Enter results
!Find avg value of 100 (10V) inputs
290
ENTER @Dig;B(*)
300
Vavg=ABS(SUM(B)/100)
310
!
320
! -------------------------- Compute DC CMRR ------------------------------------
330
!
340
Cmrr=20*LGT(10.0/(ABS(Vavg-Vos)))
350
IF Chan=1 THEN Cmrr1=Cmrr
360
IF Chan=2 THEN Cmrr2=Cmrr
!Compute CMRR, based on 10 Vdc and
0Vdc inputs
!Store channel 1 results
!Store channel 2 results
370 NEXT Chan
380 !
(continued on next page)
28
Verification Tests
Chapter 3
390 !---------------- Display Results -----------------------400 !
410 PRINT "DC Common Mode Rejection Ratio (CMRR) Test"
420 PRINT
!Display channel 1 results
!Display channel 2 results
430 PRINT "Channel 1 DC CMRR:";DROUND(Cmrr1,3);" dB"
440 PRINT "Channel 2 DC CMRR:";DROUND(Cmrr2,3);" dB"
450 END
A typical result is:
DC Common Mode Rejection Ratio (CMRR) Test
Channel 1 DC CMRR: 84.8 dB
Channel 2 DC CMRR: 82.9 dB
Test F-3: AC CMRR Test
This test checks the AC common mode rejection ratio (AC CMRR) for the
differential inputs of the digitizer. An input of 20.0 Vac PP @ 1 MHz is
applied simultaneously to the HI and LO inputs of (differential) port 3 or
port 4, with the digitizer set to the 0.1V range. The differential input value
(difference between the HI and LO port readings) is then measured by the
digitizer.
NOTE
Do not run the AC CMMR test before doing the DC CMRR test (Test F-2).
If the DC CMRR test fails, do NOT run the AC CMRR test. If the DC CMRR
test passes, but the AC CMRR test fails, perform the electronic adjustments
(A/D converter delay constant, zero offset, and gain) shown in Chapter 4 Adjustments and rerun the test. If the test still fails, replace the digitizer.
To calculate the AC CMRR, we will compare the rms value of the input
(20 Vac PP = 10 Vac Pk = 7.0714356 Vrms) with the measured rms
voltage. The rms value is the standard deviation of the measured voltage,
as calculated from the following formula, with n = 1000 readings and
vi = measured voltages.
n
n
n ∑ (v i) − (∑ v i ) 2
2
std_dev =
Chapter 3
i=1
⁄2
1
i=1
n(n−1)
Verification Tests
29
From this, the AC CMRR is calculated from the following formula. The
result should be an AC CMRR >60 dB.
ac_cmrr = 20 log10
Equipment Setup
WARNING
7.0714356
Vrms input
= 20 log10
std_dev
Vrms detected
• Set up the equipment as shown in Figure 3-2
• Set DC source output to 20.0 Vac PP @ 999990 Hz
The DC Standard (Datron 4708, Option 20) can produce
dangerous voltages that are present on the terminals. Do not
touch the front (or rear) panel terminals unless you are sure
no dangerous voltage is present.
Figure 3-2. AC CMRR Test Setup
30
Verification Tests
Chapter 3
Test Procedure
1. Make Channel 1 measurements:
MEAS1:ARR:VOLT? (1000),0.1,DEF,(@3) Set digitizer for ch 1 meas,
1000 readings, 0.1V range,
input on port 3
ENTER statement;A
Store readings in array A
2. Compute AC CMRR
Std_dev = see formula on page 3-8
Calculate standard
deviation of measurements
Cmrr = 20*LGT(7.0714356/std_dev)
Calculate AC CMRR for
20.0 Vac PP @ 1 MHz
3. Repeat the test for Channel 2 input
Make connections to port 4 HI and LO
MEAS2:ARR:VOLT? (1000),0.1,DEF,(@4) Set digitizer for ch 2 meas,
1000 readings, 0.1V range,
input on port 4
Repeat steps 1 through 3 for channel 2
Example Program
This program takes 1000 readings of the voltage on channels 1 and 2 and
displays the AC Common Mode Rejection Ratio (AC CMRR).
10
! RE-STORE "AC_CMRR"
20
!
30
! ---------------------------- Initial Setup --------------------------------
40
!
!Factory-set address
50
Addr=70905
60
INPUT " Enter digitizer Logical Address (default = 70905) ",Addr !User selects Logical Address
70
ASSIGN @Dig TO Addr
80
DIM A(1:1000)
90
FOR Chan=1 TO 2
100
CLEAR SCREEN
110
PRINT "Channel";Chan;"AC Common Mode Rejection Ratio Test"
120
PRINT
130
PRINT "1. Connect AC source to Port";Chan+2;"HI and LO"
140
PRINT "2. Set AC source output to 20.0 Vac PP @ 999990 Hz"
150
DISP " Press Continue when ready to start "
!Assign @Dig to digitizer address
!Dimension array to hold readings
!Loop for both channels
160
PAUSE
170
CLEAR SCREEN
180
!
190
! -------------------- Make measurements ---------------------------
(continued on next page)
Chapter 3
Verification Tests
31
200
!
210 OUTPUT @Dig;"MEAS"&VAL$(Chan)&":ARR:VOLT? (1000),
0.1,DEF,(@"&VAL$(Chan+2)&")"
220
ENTER @Dig;Value(*)
230
!
240
! ---------------- Compute AC CMRR -------------------------
250
!
260
FOR I=1 TO 1000
270
280
A(I)=Value(I)^2
NEXT I
290
Std_dev=SQR(((1000.0*SUM(A)-SUM(Value)^2))/9.9999E+5)
300
Cmrr=20.0*LGT(7.0714356/Std_dev)
310
IF Chan=1 THEN Cmrr1=Cmrr
320
IF Chan=2 THEN Cmrr2=Cmrr
!Take 1000 readings on specified port
with digitizer set to 0.1V range
!Enter 1000 readings
!Compute standard deviation
!Compute AC CMRR
330 NEXT Chan
340 !
350 !----------------------- Display Results -------------------------360 !
370 PRINT "AC Common Mode Rejection Ratio (CMRR) Test"
380 PRINT
390 PRINT "Channel 1 AC CMMR = ";DROUND(Cmrr1,3);" dB"
400 PRINT "Channel 2 AC CMMR = ";DROUND(Cmrr2,3);" dB"
410 END
Typical Result
A typical result follows.
AC Common Mode Rejection Ratio (CMRR) Test
Channel 1 AC CMMR = 84.1 dB
Channel 2 AC CMMR = 82.4 dB
32
Verification Tests
Chapter 3
Operation
Verification
Test
The operation verification test for the HP E1429A/B digitizers is the same
as the performance verification test, except that only one measurement per
range for each port is made, as listed in the following table.
HP E1429A/B Digitizers - Operation Verification Test Values
Ports
Performance
Verification
Test
Range (Vdc)
Input (Vdc)
1 and 2
-0.10225V
-0.2045V
-0.51125V
-1.0225V
to
to
to
to
0.10230V
0.2046V
0.5115V
1.0230V
0.07
0.15
0.35
0.70
3 and 4
-0.10225V
-0.2045V
-0.51125V
-1.0225V
-2.045V
-5.1125V
-10.225V
-20.45V
-51.125V
-102.25V
to
to
to
to
to
to
to
to
to
to
0.10230V
0.2046V
0.5115V
1.0230V
2.046V
5.115V
10.230V
20.46V
51.15V
102.30V
0.07
0.15
0.35
0.70
1.40
3.50
7.00
14.0
35.0
70.0
Performance verification tests are used to test the HP E1429A/B digitizer’s
electrical performance using the specifications in Appendix A Specifications of the HP E1429A/B User’s Manual as the performance
standards. These tests are suitable for incoming inspection and
troubleshooting.
The results of the performance verification tests should be recorded in Table
3-1, HP E1429A/B Digitizers Performance Test Record, at the end of this
chapter. HP E1429A/B performance verification includes the following test.
HP E1429A/B Digitizers - Performance Verification Test
Test #
3-1
Chapter 3
Test Name
DC Voltage
Accuracy
Measures:
DC voltage accuracy for
single-ended ports 1 and 2 and
for differential ports 3 and 4
Verification Tests
33
Test 3-1: DC Voltage Accuracy
Description
NOTE
Equipment Setup
WARNING
The purpose of this test is to verify that the HP E1429A/B digitizer meets
its specifications for DC Voltage Accuracy on all ports.
If the digitizer fails the DC voltage accuracy test, perform the electronic
adjustments in Chapter 4 - Adjustments and rerun the test. If the test then
fails, do the mechanical adjustments in Chapter 4 and rerun the test. If the
test still fails, replace the instrument.
• Set up the equipment as shown in Figure 3-3
• Set the source output for -0.07 Vdc
The DC Standard (Datron 4708, Option 10) can produce
dangerous voltages that are present on the terminals. Do not
touch the front (or rear) panel terminals unless you are sure
no dangerous voltage is present.
Figure 3-3. DCV Accuracy Test Setup
34
Verification Tests
Chapter 3
Test Procedure
1. Set Port 1 to measure DCV input:
MEAS1:ARR:VOLT? (100), .1,DEF,(@1)
Set digitizer for 100
readings on port 1
2. Input specified voltage from Datron 4708:
Use values in following table
3. Read measurement and record the reading in Table 3-1:
ENTER statement
Returns reading
Perform steps 1 - 3 for each port, range and input in the following table:
DC Voltage Accuracy Test Ranges/Inputs (Vdc)
Range
.1023V
.2046V
.5115V
1.023V
Port 1
Inputs
-0.07
-0.03
0.03
0.07
-0.15
-0.06
0.06
0.15
-0.35
-0.15
0.15
0.35
-0.7
-0.3
0.3
0.7
Port 2
Inputs
-0.07
-0.03
0.03
0.07
-0.15
-0.06
0.06
0.15
-0.35
-0.15
0.15
0.35
-0.7
-0.3
0.3
0.7
Port 3
Inputs
-0.07
-0.03
0.03
0.07
-0.15
-0.06
0.06
0.15
-0.35
-0.15
0.15
0.35
Port 4
Inputs
-0.07
-0.03
0.03
0.07
-0.15
-0.06
0.06
0.15
-0.35
-0.15
0.15
0.35
Chapter 3
2.046V
5.115V
10.23V
20.46V
51.15V
102.3V
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
-0.7
-0.3
0.3
0.7
-1.4
-0.6
0.6
1.4
-3.5
-1.5
1.5
3.5
-7
-3
3
7
-14
-6
6
14
-35
-15
15
35
-70
-30
30
70
-0.7
-0.3
0.3
0.7
-1.4
-0.6
0.6
1.4
-3.5
-1.5
1.5
3.5
-7
-3
3
7
-14
-6
6
14
-35
-15
15
35
-70
-30
30
70
Verification Tests
35
Example Program
This program measures the DC input voltage for each value in the
preceeding table and displays the results.
10!
RE-STORE "PERFTEST"
20
!
30
!------------------ Enter input values and digitizer ranges --------------------
40
!
50
Addr=70905
60
INPUT " Enter digitizer logical address (default = 70905) ",Addr
70
ASSIGN @Dig TO Addr
80
DISP CHR$(129)
90
DIM Input(1:40),Range(1:10),Reading(1:100),Result(1:4,1:10,1:112)
100 DIM Lower(1:4,1:10,1:112),Delta(1:4,1:10,1:112)
110 DIM Upper(1:4,1:10,1:112),Flag$(1:4,1:10,1:112)[4]
120 DATA .1023,.2046,.5115,1.023,2.046
130 DATA 5.115,10.23,20.46,51.15,102.3
140 READ Range(*)
150 DATA -.07,-.03,.03,.07,-.15,-.06,.06,.15,-.35,-.15,.15,.35
160 DATA -.7,-.3,.3,.7,-1.4,-.6,.6,1.4,-3.5,-1.5,1.5,3.5
170 DATA -7,-3,3,7,-14,-6,6,14,-35,-15,15,35,-70,-30,30,70
180 READ Input(*)
190 !
200 ! ------------ Make DCV measurements for ports 1 - 4 ----------------210 !
220 FOR I=1 TO 4
!ports
230
IF I=1 OR I=3 THEN Chan=1
240
IF I=2 OR I=4 THEN Chan=2
250
IF I=1 OR I=2 THEN Nbr=4
260
IF I=3 OR I=4 THEN Nbr=10
270
FOR J=1 TO Nbr
280
!ranges
FOR K=4*J-3 TO 4*J
290 Retry:
!inputs
!
300
CLEAR SCREEN
310
PRINT "DC Voltage Accuracy Measurements"
320
PRINT
330
PRINT " Port:
";I
340
PRINT " Range (Vdc): ";Range(J)
350
PRINT " Input (Vdc): ";Input(K)
360
PRINT
370
PRINT "1. Connect DC source output to Port";I
380
PRINT "2. Set DC source output to ";Input(K);"Vdc"
(continued on next page)
36
Verification Tests
Chapter 3
390
IF ABS(Input(K))=70 THEN
400
BEEP
410
PRINT
420
PRINT "WARNING: HIGH VOLTAGE OUTPUT FROM SOURCE"
430
END IF
440
DISP " Press Continue when voltage is input "
450
PAUSE
460
OUTPUT @Dig;"MEAS"&VAL$(Chan)&":ARR:VOLT?
(100),"&VAL$(Range(J))&",DEF,(@"&VAL$(I)&")"
470
ENTER @Dig;Reading(*)
480
Result(I,J,K)=SUM(Reading)/100
490
IF I=1 OR I=2 THEN
500
510
Delta(I,J,K)=ABS(.004*Input(K))+.005*Range(J)
ELSE
520
Delta(I,J,K)=ABS(.005*Input(K))+.02*Range(J)
530
END IF
540
Upper(I,J,K)=Input(K)+Delta(I,J,K)
550
Lower(I,J,K)=Input(K)-Delta(I,J,K)
560
IF Result(I,J,K)< (I,J,K) OR Result(I,J,K)>Upper(I,J,K) THEN
570
Flag$(I,J,K)="FAIL"
580
GOTO Test_fail
590
END IF
600 Next_meas:
610
620
!
NEXT K
NEXT J
630 NEXT I
640 !
650 !------------------------------ Print Results ----------------------------------------660 !
670 Print_res: !
680 CLEAR SCREEN
690 INPUT " Do you want to print (P) or display (D) the results? ",Ans$
700 IF Ans$="P" OR Ans$="p" THEN
710
Ptr_addr=701
720
INPUT " Enter printer address (701 is default) ",Ptr_addr
730
PRINTER IS Ptr_addr
740 ELSE
750
PRINTER IS 1
760 END IF
770 PRINT "HP E1429A/B Digitizers - DCV Accuracy Test"
780 PRINT
(continued on next page)
Chapter 3
Verification Tests
37
790 PRINT "Date: ";DATE$(TIMEDATE)
800 PRINT "Time: ";TIME$(TIMEDATE)
810 PRINT
820 PRINT "Port Range
830 PRINT "
(Vdc)
Input
(Vdc)
Minimum
(Vdc)
Measured
(Vdc)
Maximum
Pass/Fail"
(Vdc)"
840 PRINT
850 Fmt:IMAGE D,3X,3D.5D,3X,S3D.2D,3X,S3D.5D,3X,S3D.5D,3X,S3D.5D,4X,4A
860 FOR I=1 TO 4
870
IF I=1 OR I=2 THEN Nbr_print=4
880
IF I=3 OR I=4 THEN Nbr_print=10
890
FOR J=1 TO Nbr_print
900
FOR K=4*J-3 TO 4*J
910
PRINT USING Fmt;I,Range(J),Input(K),Lower(I,J,K),Result(I,J,K),Upper(I,J,K),Flag$(I,J,K)
920
IF Next$(K)="E" OR Next$(K)="e" THEN End_print
930
940
NEXT K
NEXT J
950 NEXT I
960 End_print: !
970 GOTO End_prog
980 !
990 !--------------------------- Test Failure Indication ---------------------------------1000 !
1010 Test_fail: !
1020 CLEAR SCREEN
1030 Flag$(I,J,K)="FAIL"
1040 BEEP
1050 PRINT "
NOTE"
1060 PRINT
1070 PRINT "The measurement test FAILED for the ";Input(K);"V input"
1080 PRINT "on the ";Range(J);"V range"
1090 PRINT
1100 PRINT "Measured voltage = ";DROUND(Result(I,J,K),4);"V"
1110 PRINT "Expected voltage = ";DROUND(Input(K),4);"V"
1120 PRINT "Maximum Limit
= ";DROUND(Upper(I,J,K),4)
1130 PRINT "Minimum Limit
= ";DROUND(Lower(I,J,K),4)
1140 PRINT
1150 PRINT "Be sure the DC Standard OUTPUT is set to ";Input(K);"V"
1160 PRINT "and the DC Standard OUTPUT switch is set to ON"
1170 PRINT
1180 Reenter:
!
1190 INPUT " End this test (E), retry this measurement (R), or do next measurement (N)? ",Next$(K)
(continued on next page)
38
Verification Tests
Chapter 3
1200 CLEAR SCREEN
1210 IF Next$(K)="E" OR Next$(K)="e" THEN GOTO Print_res
1220 IF Next$(K)="R" OR Next$(K)="r" THEN
1230
Flag$(I,J,K)=""
1240
GOTO Retry
1250 END IF
1260 IF Next$(K)="N" OR Next$(K)="n" THEN
1270
GOTO Next_meas
1280 ELSE
1290
DISP " You entered an incorrect letter. Please reenter desired action. "
1300
GOTO Reenter
1310 END IF
1320 !
1330 ! ------------------------------ Error Messages -----------------------------------------1340 !
1350 Err_msg: !
1360 CLEAR SCREEN
1370 BEEP
1380 PRINT "Error messages"
1390 PRINT "Correct errors listed and then rerun this program"
1400 PRINT
1410 REPEAT
1420
OUTPUT @Dig;"SYST:ERR?"
1430
ENTER @Dig;Err_msg$
1440
PRINT Err_msg$
1450 UNTIL Err_msg$="+0,""No error"""
1460 STOP
1470 End_prog: !
1480 END
Typical Result
HP E1429A/B Digitizers DC Accuracy Test
Date: 11 Feb 1994
Time: 14:30:01
Port
1
.
.
4
Range
(Vdc)
Input
(Vdc)
Minimum
(Vdc)
Measurement
(Vdc)
Maximum
(Vdc)
.10230
.
.
102.30000
-.07
.
.
+70.00
-.07079
.
.
+67.60400
-.07001
.
.
+69.91
-.06921
.
.
+72.39600
Chapter 3
Pass/Fail
Verification Tests
39
Performance
Test Record
Table 3-1, HP E1429A/B Digitizers Performance Test Record, is a form
you can copy and use to record performance verification test results for
the digitizers. This table shows digitizer instrument accuracy, Datron 4708
(source) measurement uncertainty, and test accuracy ratio (TAR) values.
See Appendix B - Calculating Digitizer Accuracy for information on
accuracy, measurement uncertainty, and TAR calculations.
Digitizer Test
Limits
Test limits are defined using the 1-year specifications in Appendix ASpecifications of the HP E1429A/B User’s Manual. See Appendix B Calculating Digitizer Accuracy in this manual for sample calculations
of digitizer test limits.
Measurement
Uncertainty
For the performance verification tests in this manual, the measurement
uncertainties are based on the 90-day accuracy specifications for the
Datron 4708 Source. See Appendix B - Calculating Digitizer Accuracy
in this manual for sample calculations of measurement uncertainty.
Test Accuracy
Ratio (TAR)
Test Accuracy Ratio (TAR) for the HP E1429A/B digitizers is defined as
Digitizer Accuracy divided by Measurement Uncertainty, where accuracy
= maximum allowable value - expected reading (input). That is:
TAR =
Maximum − Input
MeasurementUncertainty
For TARs that exceed 10:1, the entry is ">10:1".
40
Performance Tests
Chapter 3
Table 3-1. HP E1429A/B Digitizers Performance Test Record (Page 1 of 5)
Test Facility:
Name __________________________________
Report No. ______________________________
Address _________________________________
Date ___________________________________
City/State ________________________________
Customer _______________________________
Phone __________________________________
Tested by _______________________________
Model
_________________________________
Ambient temperature _____________________oC
Serial No. ________________________________
Relative humidity _________________________%
Options
Line frequency __________________ Hz (nominal)
________________________________
Firmware Rev. ___________________________
Special Notes:
______________________________________________________________________________________________
______________________________________________________________________________________________
______________________________________________________________________________________________
______________________________________________________________________________________________
______________________________________________________________________________________________
______________________________________________________________________________________________
______________________________________________________________________________________________
______________________________________________________________________________________________
______________________________________________________________________________________________
______________________________________________________________________________________________
______________________________________________________________________________________________
______________________________________________________________________________________________
______________________________________________________________________________________________
______________________________________________________________________________________________
Chapter 3
Performance Tests
41
Table 3-1. HP E1429A/B Digitizers Performance Test Record (Page 2 of 5)
Model ___________________________ Report No. _____________________ Date ____________
Test Equipment Used:
Description
Model No.
Trace No.
Cal Due Date
1. ___________________________
______________
______________
______________
2. ___________________________
______________
______________
______________
3. ___________________________
______________
______________
______________
4. ___________________________
______________
______________
______________
5. ___________________________
______________
______________
______________
6. ___________________________
______________
______________
______________
7. ___________________________
______________
______________
______________
8. ___________________________
______________
______________
______________
9. ___________________________
______________
______________
______________
10. ___________________________
______________
______________
______________
11. ___________________________
______________
______________
______________
12. ___________________________
______________
______________
______________
13. ___________________________
______________
______________
______________
14. ___________________________
______________
______________
______________
15. ___________________________
______________
______________
______________
16. ___________________________
______________
______________
______________
17. ___________________________
______________
______________
______________
18. ___________________________
______________
______________
______________
19. ___________________________
______________
______________
______________
20. ___________________________
______________
______________
______________
42
Performance Tests
Chapter 3
Table 3-1. HP E1429A/B Digitizers Performance Test Record (Page 3 of 5)
Test 3-1: DC Voltage Measurement Accuracy - Port 1 Measurements (All values in Vdc)
Range
Input
Minimum
Measured
Maximum
M.U.*
TAR**
-0.10225
to
+0.10230
-0.07
-0.03
+0.03
+0.07
-0.0708
-0.0306
+0.0294
+0.0692
__________
__________
__________
__________
-0.0692
-0.0294
+0.0306
+0.0708
1.1E-6
9.2E-7
9.2E-7
1.1E-6
>10:1
>10:1
>10:1
>10:1
-0.2045
to
+0.2046
-0.15
-0.06
+0.06
+0.15
-0.1516
-0.0613
+0.0587
+0.1484
__________
__________
__________
__________
-0.1484
-0.0587
+0.0613
+0.1516
1.4E-6
1.0E-6
1.0E-6
1.4E-6
>10:1
>10:1
>10:1
>10:1
-0.51125
to
+0.5115
-0.35
-0.15
+0.15
+0.35
-0.3540
-0.1532
+0.1468
+0.3460
__________
__________
__________
__________
-0.3460
-0.1468
+0.1532
+0.3540
2.2E-6
1.4E-6
1.4E-6
2.2E-6
>10:1
>10:1
>10:1
>10:1
-1.0225
to
+1.0230
-0.7
-0.3
+0.3
+0.7
-0.7079
-0.3063
+0.2937
+0.6921
__________
__________
__________
__________
-0.6921
-0.2937
+0.3063
+0.7079
4.8E-6
3.8E-6
3.8E-6
4.8E-6
>10:1
>10:1
>10:1
>10:1
Test 3-1: DC Voltage Measurement Accuracy - Port 2 Measurements (All values in Vdc)
Range
Input
Minimum
Measured
Maximum
M.U.*
TAR**
-0.10225
to
+0.10230
-0.07
-0.03
+0.03
+0.07
-0.0708
-0.0306
+0.0294
+0.0692
__________
__________
__________
__________
-0.0692
-0.0294
+0.0306
+0.0708
1.1E-6
9.2E-7
9.2E-7
1.1E-6
>10:1
>10:1
>10:1
>10:1
-0.2045
to
+0.2046
-0.15
-0.06
+0.06
+0.15
-0.1516
-0.0613
+0.0587
+0.1484
__________
__________
__________
__________
-0.1484
-0.0587
+0.0613
+0.1516
1.4E-6
1.0E-6
1.0E-6
1.4E-6
>10:1
>10:1
>10:1
>10:1
-0.51125
to
+0.5115
-0.35
-0.15
+0.15
+0.35
-0.3540
-0.1532
+0.1468
+0.3460
__________
__________
__________
__________
-0.3460
-0.1468
+0.1532
+0.3540
2.2E-6
1.4E-6
1.4E-6
2.2E-6
>10:1
>10:1
>10:1
>10:1
-1.0225
to
+1.0230
-0.7
-0.3
+0.3
+0.7
-0.7079
-0.3063
+0.2937
+0.6921
__________
__________
__________
__________
-0.6921
-0.2937
+0.3063
+0.7079
4.8E-6
3.8E-6
3.8E-6
4.8E-6
>10:1
>10:1
>10:1
>10:1
* M.U. = 90-day accuracy of the Datron 4708 @ 230C ±10C
** TAR = Test Accuracy Ratio = Digitizer Accuracy/Source M.U., shown
Chapter 3
Performance Tests
43
Table 3-1. HP E1429A/B Digitizers Performance Test Record (Page 4 of 5)
Test 3-1: DC Voltage Measurement Accuracy - Port 3 Measurements (All values in Vdc)
Range
Input
Minimum
Measured
Maximum
M.U.
TAR
-0.10225
to
+0.10230
-0.07
-0.03
+0.03
+0.07
-0.0724
-0.0322
+0.0278
+0.0676
__________
__________
__________
__________
-0.0676
-0.0278
+0.0322
+0.0724
1.1E-6
9.2E-7
9.2E-7
1.1E-6
>10:1
>10:1
>10:1
>10:1
-0.2045
to
+0.2046
-0.15
-0.06
+0.06
+0.15
-0.1548
-0.0644
+0.0556
+0.1452
__________
__________
__________
__________
-0.1452
-0.0556
+0.0644
+0.1548
1.4E-6
1.0E-6
1.0E-6
1.4E-6
>10:1
>10:1
>10:1
>10:1
-0.51125
to
+0.5115
-0.35
-0.15
+0.15
+0.35
-0.362
-0.161
+0.139
+0.338
__________
__________
__________
__________
-0.338
-0.139
+0.161
+0.362
2.2E-6
1.4E-6
1.4E-6
2.2E-6
>10:1
>10:1
>10:1
>10:1
-1.0225
to
+1.0230
-0.7
-0.3
+0.3
+0.7
-0.724
-0.322
+0.278
+0.676
__________
__________
__________
__________
-0.676
-0.278
+0.322
+0.724
4.8E-6
3.8E-6
3.8E-6
4.8E-6
>10:1
>10:1
>10:1
>10:1
-2.045
to
+2.046
-1.4
-0.6
+0.6
+1.4
-1.448
-0.644
+0.556
+1.352
__________
__________
__________
__________
-1.352
-0.556
+0.644
+1.352
6.5E-6
4.5E-6
4.5E-6
6.5E-6
>10:1
>10:1
>10:1
>10:1
-5.1125
to
+5.115
-3.5
-1.5
+1.5
+3.5
-3.62
-1.61
+1.39
+3.38
__________
__________
__________
__________
-3.38
-1.39
+1.61
+3.62
1.2E-5
6.8E-6
6.8E-6
1.2E-5
>10:1
>10:1
>10:1
>10:1
-10.225
to
+10.230
-7
-3
+3
+7
-7.24
-3.22
+2.78
+6.76
__________
__________
__________
__________
-6.76
-2.78
+3.22
+7.24
7.8E-5
6.2E-5
6.2E-5
7.8E-5
>10:1
>10:1
>10:1
>10:1
-20.45
to
+20.46
-14
-6
+6
+14
-14.48
-6.44
+5.56
+13.52
__________
__________
__________
__________
-13.32
-5.56
+6.44
+14.48
1.1E-4
7.4E-5
7.4E-5
1.1E-4
>10:1
>10:1
>10:1
>10:1
-51.125
to
+51.15
-35
-15
+15
+35
-36.2
-16.1
+13.9
+33.8
__________
__________
__________
__________
-33.8
-13.9
+16.1
+36.2
1.9E-4
1.1E-4
1.1E-4
1.9E-4
>10:1
>10:1
>10:1
>10:1
-102.25
to
102.30
-70
-30
+30
+70
-72.4
-32.2
+27.8
+67.6
__________
__________
__________
__________
-67.6
-27.8
+32.2
+72.4
3.3E-4
1.7E-4
1.7E-5
3.3E-4
>10:1
>10:1
>10:1
>10:1
44
Performance Tests
Chapter 3
Table 3-1. HP E1429A/B Digitizers Performance Test Record (Page 5 of 5)
Test 3-1: DC Voltage Measurement Accuracy - Port 4 Measurements (All values in Vdc)
Range
Input
Minimum
Measured
Maximum
M.U.*
TAR**
-0.10225
to
+0.10230
-0.07
-0.03
+0.03
+0.07
-0.0724
-0.0322
+0.0278
+0.0676
__________
__________
__________
__________
-0.0676
-0.0278
+0.0322
+0.0724
1.1E-6
9.2E-7
9.2E-7
1.1E-6
>10:1
>10:1
>10:1
>10:1
-0.2045
to
+0.2046
-0.15
-0.06
+0.06
+0.15
-0.1548
-0.0644
+0.0556
+0.1452
__________
__________
__________
__________
-0.1452
-0.0556
+0.0644
+0.1548
1.4E-6
1.0E-6
1.0E-6
1.4E-6
>10:1
>10:1
>10:1
>10:1
-0.51125
to
+0.5115
-0.35
-0.15
+0.15
+0.35
-0.362
-0.161
+0.139
+0.338
__________
__________
__________
__________
-0.338
-0.139
+0.161
+0.362
2.2E-6
1.4E-6
1.4E-6
2.2E-6
>10:1
>10:1
>10:1
>10:1
-1.0225
to
+1.0230
-0.7
-0.3
+0.3
+0.7
-0.724
-0.322
+0.278
+0.676
__________
__________
__________
__________
-0.676
-0.278
+0.322
+0.724
4.8E-6
3.8E-6
3.8E-6
4.8E-6
>10:1
>10:1
>10:1
>10:1
-2.045
to
+2.046
-1.4
-0.6
+0.6
+1.4
-1.448
-0.644
+0.556
+1.352
__________
__________
__________
__________
-1.352
-0.556
+0.644
+1.352
6.5E-6
4.5E-6
4.5E-6
6.5E-6
>10:1
>10:1
>10:1
>10:1
-5.1125
to
+5.115
-3.5
-1.5
+1.5
+3.5
-3.62
-1.61
+1.39
+3.38
__________
__________
__________
__________
-3.38
-1.39
+1.61
+3.62
1.2E-5
6.8E-6
6.8E-6
1.2E-5
>10:1
>10:1
>10:1
>10:1
-10.225
to
+10.230
-7
-3
+3
+7
-7.24
-3.22
+2.78
+6.76
__________
__________
__________
__________
-6.76
-2.78
+3.22
+7.24
7.8E-5
6.2E-5
6.2E-5
7.8E-5
>10:1
>10:1
>10:1
>10:1
-20.45
to
+20.46
-14
-6
+6
+14
-14.48
-6.44
+5.56
+13.52
__________
__________
__________
__________
-13.32
-5.56
+6.44
+14.48
1.1E-4
7.4E-5
7.4E-5
1.1E-4
>10:1
>10:1
>10:1
>10:1
-51.125
to
+51.15
-35
-15
+15
+35
-36.2
-16.1
+13.9
+33.8
__________
__________
__________
__________
-33.8
-13.9
+16.1
+36.2
1.9E-4
1.1E-4
1.1E-4
1.9E-4
>10:1
>10:1
>10:1
>10:1
-102.25
to
102.30
-70
-30
+30
+70
-72.4
-32.2
+27.8
+67.6
__________
__________
__________
__________
-67.6
-27.8
+32.2
+72.4
3.3E-4
1.7E-4
1.7E-5
3.3E-4
>10:1
>10:1
>10:1
>10:1
Chapter 3
Performance Tests
45
Notes
46
Performance Tests
Chapter 3
Chapter 4
Adjustments
Introduction
The procedures in this chapter show how to perform electronic and
mechanical adjustments for the HP E1429A/B digitizers, including:
• Electronic Adjustments
- A/D converter delay constant
- zero offset adjustments
- channel gain adjustments
• Mechanical Adjustments
- AC common mode rejection ratio (AC CMRR)
- Flatness adjustments
Adjustments
Guidelines
Table 4-1 summarizes suggested adjustments procedures for the HP
E1429A/B digitizers. Note that the adjustments MUST be done in the
order listed above (electronic adjustments followed by mechanical
adjustments).
Table 4-1. HP E1429A/B Digitizers Adjustment Guidelines
If this test fails:
Do these adjustments:
After you do the adjustments:
Test F-1: Self-Test
Electronic Adjustments
Rerun the self-test. If the test still fails, replace
the instrument.
Test F-2: DC CMRR
Electronic Adjustments
Rerun the DC CMRR test. If the test still fails, replace the
instrument.
Test F-3: AC CMRR
Electronic Adjustments
Rerun the AC CMRR test. If the test still fails, replace the
instrument.
Test 3-1: DC Accuracy
Electronic Adjustments
followed by
Mechanical Adjustments
After doing the Electronic Adjustments, rerun the DC
Accuracy Test. If the test then fails, do the Mechanical
Adjustments and rerun the test. If the test still fails, replace
the instrument.
Adjustments
Environment
Chapter 4
See Table 1-1 in Chapter 1 - General Information for test equipment
required for the procedures described in this chapter. Before performing
adjustments, allow the HP E1429A/B digitizer to warm up for at least one
hour. The temperature should be within ±5oC of the temperature of the
most recent adjustments and between 18oC and 28oC.
Adjustments
47
Making
Electronic
Adjustments
NOTE
Description
Equipment Setup
WARNING
This section shows how to make electronic adjustments for the HP
E1429A/B digitizers, including adjustments for:
• A/D converter delay constant
• Zero offset
• Channel gain
Perform electronic adjustments if the self-test, DC CMRR, AC CMRR,
or DC Accuracy test in Chapter 3 - Verification Tests fails. Electronic
adjustments must be done in the order shown above.
This procedure adjusts each range for ports 1 through 4 on the digitizer.
This procedure uses default settings for the zero offset and gain
adjustments. See Appendix A - CALibration Commands to change settings
as required.
• Connect the equipment as shown in Figure 4-1
• Set the DC source output to 1.0 Vdc
The DC Standard (Datron 4708, Option 10) can produce
dangerous voltages that are present on the terminals. Do not
touch the front (or rear) panel terminals unless you are sure no
dangerous voltage is present.
Figure 4-1. Electronic Adjustments Setup
48
Adjustments
Chapter 4
Adjustment
Procedure
1. Reset the digitizer:
*RST;*CLS
Reset digitizer
2. Read starting number of calibrations:
CAL:COUN?
Query calibration count
3. Adjust A/D converter delay constant:
CAL:STOR:AUTO OFF
Do not store cal constants
CAL:SEC:STAT OFF,E1429
Turn cal security OFF
CAL:DEL
Calibrate delay constant
for A/D converter
4. Make zero offset adjustments for channels 1 and 2:
CAL1:ZERO DEF,DEF,ALL
Zero offset cal on channel 1
CAL2:ZERO DEF,DEF,ALL
Zero offset cal on channel 2
5. Make gain adjustments for all ranges on ports 1-4:
CONF <chan>:ARR:VOLT (1000),<input>,DEF,<port>
Configure each channel
for 1000 readings for the
input and port specified
CAL <chan>:VAL <input>
Specify voltage level to be
applied to port
Repeat Step 5 for all ranges and ports in the order shown in the following table:
Ports
1/2
Range
(Vdc)
1.0230
0.1023
0.2046
0.5115
Input
(Vdc)
1.0
0.1
0.2
0.5
Ports
Range
(Vdc)
Input
(Vdc)
1.0230
0.1023
0.2046
0.5115
2.046
5.1125
10.23
20.46
51.15
102.30
1.0
0.1
0.2
0.5
2.0
5.0
10.0
20.0
50.0
50.0*
3/4
*Do NOT exceed 50 Vdc for the 102 Vdc range
6. Store cal constants/read ending cal number:
CAL1:STOR
Store chan 1 cal const
CAL2: STOR
Store chan 2 cal const
CAL:COUN?
Query calibration number
7. Turn calibration security ON:
CAL:SEC:STAT ON
Chapter 4
Turn calibration security
ON for both channels
Adjustments
49
Example Program
An example program follows to perform an A/D converter delay constant
adjustment, zero offset adjustment, and channel gain adjustments for
channels 1 and 2. This program performs all adjustments using default
settings. If you do not want to use the default settings, see Appendix A CALibration Commands for guidelines to set changes.
10! RE-STORE "ADJUST"
20
!
30
! --------------- Initial Setup -----------------------
40
!
50
CLEAR SCREEN
60
Addr=70905
70
INPUT " Enter digitizer logical address (default = 70905) ",Addr
80
ASSIGN @Dig TO Addr
90
OUTPUT @Dig;"*RST;*CLS"
!Factory-set logical address
!Assign @Dig to digitizer address
!Reset instrument
100 !
110 ! -------- Read starting calibration count -----------120 !
130 OUTPUT @Dig;"CAL:COUN?"
140 ENTER @Dig;Cal_ct_orig
!Query calibration count (shared by
both channels)
!Enter calibration count
150 !
160 !--------- Adjust A/D converter delay constant -----------170 !
180 OUTPUT @Dig;"CAL:SEC:STAT OFF,E1429"
190 OUTPUT @Dig;"CAL:STOR:AUTO OFF"
200 OUTPUT @Dig;"CAL:DEL"
!Turn cal security OFF (both channels)
!Turn off storage of cal constants
!Adjust A/D converter delay constant
(both channels)
210 !
220 !------ Zero offset adjustments for Channels 1 and 2 -----230 !
240 OUTPUT @Dig;"CAL1:ZERO DEF,DEF,ALL"
250 OUTPUT @Dig;"CAL2:ZERO DEF,DEF,ALL"
!Zero offset adjustment for channel 1
!Zero offset adjustment for channel 2
260 !
270 !---- Gain adjustments for all ranges on ports 1-4 ------280 !
290 DIM Input(1:10),Range(1:10)
300 DATA 1.0,0.1,0.2,0.5,2.0,5.0,10.0,20.0,50.0,50.0
!Enter voltage source input values
310 READ Input(*)
320 DATA 1.0,0.1,0.2,0.5,2.0,5.0,10.0,20.0,50.0,100.0
!Enter digitizer voltage ranges
!Gain adjustments for all four ports
330 READ Range(*)
340 FOR Port=1 TO 4
350
IF Port=1 OR Port=3 THEN Chan=1
(continued on next page)
50
Adjustments
Chapter 4
360
IF Port=2 OR Port=4 THEN Chan=2
370
IF Port=1 OR Port=2 THEN Nbr=4
380
IF Port=3 OR Port=4 THEN Nbr=10
390
FOR I=1 TO Nbr
400 Retry:
!
410
CLEAR SCREEN
420
PRINT "HP E1429A/B Digitizer Gain Adjustments"
430
PRINT
440
PRINT "Port:";Port;" Range:";Range(I);"Vdc"
450
PRINT
460
IF Port=1 OR Port=2 THEN
470
PRINT "1. Connect DC source output to Port";Port
480
PRINT "2. Set DC source output to ";Input(I);"Vdc"
490
ELSE
500
PRINT "1. Connect DC source output to Port";Port;"HI"
510
PRINT "2. Set DC source output to ";Input(I);"Vdc"
520
END IF
530
IF I=10 THEN
540
PRINT
550
PRINT "
560
PRINT
WARNING"
570
PRINT "The input for the 100V range is 50 Vdc, NOT"
580
PRINT "100 Vdc. To avoid possible shock hazard, do NOT"
590
PRINT "input more than 50 Vdc for this adjustment. "
600
END IF
610
DISP " Press Continue when voltage is input "
620
PAUSE
630
OUTPUT @Dig;"CONF"&VAL$(Chan)&":ARR:VOLT (1000),
"&VAL$(Input(I))&",DEF,(@"&VAL$(Port)&")"
640
OUTPUT @Dig;"CAL"&VAL$(Chan)&":VAL ";Input(I)
650
OUTPUT @Dig;"CAL"&VAL$(Chan)&":GAIN DEF,DEF"
660
DIM Err_msg$[256]
670
OUTPUT 70905;"SYST:ERR?"
680
ENTER 70905;Code,Err_msg$
690
700
IF Code<>0 THEN GOTO Err_chk
NEXT I
710 NEXT Port
!CONFigure digitizer to known state
!Specify input voltage
!Perform channel gain on specified port
!Check for gain adjustment errors
!Call error routine on error
!Next adjustment
!Next port
720 !
730 ! ------- Read new calibration constants ------------740 !
750 DIM Ndig$[1],Count$[9]
760 ASSIGN @Digu TO Addr;FORMAT OFF
770 OUTPUT @Dig;"FORM PACK"
!Dimension header parameters
!Turn FORMAT OFF for array data
!Set PACKed format
(continued on next page)
Chapter 4
Adjustments
51
780 FOR J=1 TO 2
790
OUTPUT @Dig;"CAL"&VAL$(J)&":DATA?"
800
ENTER @Digu USING "#,X,K,K";Ndig$;Count$[1;VAL(Ndig$)]
810
IF J=1 THEN
820
ALLOCATE INTEGER Cal1_data(1:VAL(Count$)/2)
830
ENTER @Digu;Cal1_data(*)
840
850
ENTER @Dig USING "B";Line_feed
!Query channel calibration constants
!Strip off header
!Allocate array for channel 1 data
!Enter channel 1 data
!Strip off leftover line feed
ELSE
860
ALLOCATE INTEGER Cal2_data(1:VAL(Count$)/2)
870
ENTER @Digu;Cal2_data(*)
880
ENTER @Dig USING "B";Line_feed
890
END IF
900
NEXT J
910
!
920
!------------ Store cal constants/read cal count ------
930
!
940
OUTPUT @Dig;"CAL1:STOR"
950
OUTPUT @Dig;"CAL2:STOR"
960
OUTPUT @Dig;"CAL:COUN?"
970
ENTER @Dig;Cal_count
980
!
990
!------------ Display results ---------------------
!Allocate array for channel 2 data
!Enter channel 2 data
!Strip off leftover line feed
1000 !
1010 CLEAR SCREEN
1020 PRINT "HP E1429A/B Digitizer Calibration Constants"
1030 PRINT
1040 PRINT "Date: ";DATE$(TIMEDATE)
1050 PRINT "Time: ";TIME$(TIMEDATE)
1060 PRINT "Starting calibration count =";Cal_ct_orig
1070 PRINT "Ending calibration count =";Cal_count
1080 PRINT
1090 PRINT "Channel 1 Calibration Constants"
1100 PRINT
1110 PRINT Cal1_data(*)
1120 PRINT
1130 PRINT "Channel 2 Calibration Constants"
1140 PRINT
1150 PRINT Cal2_data(*)
1160 GOTO No_err
1170 !
1180 !---------------On error, display error message --------------1190 !
(continued on next page)
52
Adjustments
Chapter 4
1200 Err_chk:!
1210 CLEAR SCREEN
1220 PRINT
1230 PRINT "Gain Adjustment Error"
1240 PRINT
1250 PRINT "Port:
";Port
1260 PRINT "Range: ";Range(I);"Vdc"
1270 PRINT "Input: ";Value(I);"Vdc"
1280 BEEP
1290 PRINT
1300 PRINT Code,Err_msg$
!Display error message
1310 PRINT
1320 PRINT "1. Check input value/port connections"
1330 PRINT "2. Correct as necessary and rerun this adjustment"
1340 DISP " Press Continue to rerun this adjustment "
1350 PAUSE
1360 GOTO Retry
1370 No_err: !
1380 OUTPUT @Dig;"CAL:SEC:STAT ON"
!Turn cal security ON (both channels)
1390 END
Typical Result
A typical result follows. In the following display for channel 1, index 0 in
Table 2-1 = -147, index 1 = 939,..., index 61 = -307. For channel 2, index 0
= -150, index 1 = 939,..., index 61 = -310.
Since this program generates 30 adjustments (2 for zero offset adjustments,
8 for channel gain adjustments on Ports 1 and 2, and 20 for channel gain
adjustments on Ports 3 and 4), the difference between the starting and
ending calibration count should be 30 counts.
Chapter 4
Adjustments
53
HP E1429A/B Digitizer Calibration Constants
Date: 17 Feb 1994
Time: 10:15:23
Starting calibration count = 189
Ending calibration count = 219
Channel 1 Calibration Constants
-147
-30
-42
397
-343
-306
397
-281
939
58
43
-300
385
-277
-300
395
533
21
387
-306
-312
390
-281
-302
336
88
-310
407
-310
-307
391
-281
-819
-15
117
-290
387
-279
-306
390
-450
57
2047
-290
-310
393
-280
-307
-21
21
-2048
413
-293
-304
392
59
99
-328
-284
391
-279
-305
533
21
387
-306
-312
390
-281
-302
336
88
-310
407
-310
-307
391
-281
-819
-15
117
-290
387
-279
-306
390
-450
57
2047
-290
-310
393
-280
-310
-21
21
-2048
413
-293
-304
392
59
99
-328
-284
391
-279
-305
Channel 2 Calibration Constants
-150
-30
-42
397
-343
-306
397
-281
54
939
58
43
-300
385
-277
-300
395
Adjustments
Chapter 4
Making
Mechanical
Adjustments
NOTE
AC Common Mode
Rejection Ratio
Adjustments
Description
This section shows how to make mechanical adjustments for the HP
E1429A/B digitizers, including:
• AC Common Mode Rejection Ratio (AC CMRR) Adjustments
• Flat Frequency Response (Flatness) Adjustments
The electronic adjustments shown in "Making Electronic Adjustments"
MUST be done before doing any of the mechanical adjustments. Also, the
AC CMRR adjustment must be done before the Flatness adjustment.
This procedure allows the user to minimize the differential voltage by
adjusting AC CMRR to maximum.
This procedure adjusts the digitizer so that AC Common Mode Rejection
Ratio (AC CMRR) for the differential input ports is maximized. This, in
turn, minimizes the differential voltage for the digitizer.
As shown in Figure 4-2, to perform AC CMRR adjustments an input of
20.0 Vac PP @ 999990 Hz is applied simultaneously to the HI and LO
inputs of (differential) port 3 or port 4, with the digitizer set to the 0.1V
range. Capacitor C306 (for channel 1) or C406 (for channel 2) is then
adjusted until the differential voltage is minimized.
Figure 4-2. AC CMRR Adjustments
Chapter 4
Adjustments
55
Equipment Setup
WARNING
• Set up the equipment as shown in Figure 4-3
• Set DC source output to 20.0 Vac PP @ 999990 Hz
The DC Standard (Datron 4708, Option 20) can produce
dangerous voltages that are present on the terminals. Do not
touch the front (or rear) panel terminals unless you are sure
no dangerous voltage is present.
Figure 4-3. AC CMRR Adjustments Setup
Test Procedure
1. Make Channel 1 measurements:
MEAS1:ARR:VOLT? (1000),0.1,DEF,(@3) Set digitizer for ch 1 meas,
1000 readings, 0.1V range,
input on port 3
ENTER statement;Values
Store 1000 readings in
data array A
2. Compute AC CMRR
Cmrr=20*LGT(7.0714356/Std_dev)
(Calculate AC CMRR for
20.0 Vac input (see Test
F-3 in Chap 3)
3. Repeat the test for Channel 2 input
Make connections to port 4 HI and LO
MEAS2:ARR:VOLT? (1000),0.1,DEF,(@4) Set digitizer for ch 2 meas,
1000 readings, 0.1V range,
input on port 4
56
Adjustments
Chapter 4
Example Program
This program allows you to adjust C306 (channel 1) or C406 (channel 2) for
maximum AC CMRR. The display is similar to the following. Adjust C306
or C406 until the AC CMRR value is maximized.
AC Common Mode Rejection Ratio = 84.3 dB
70 dB
75 dB
80 dB
85 dB
90 dB
10
20
! RE-STORE "AC_ADJS"
!
30
! ---------------------------- Initial Setup --------------------------------
40
!
50
!Factory-set address
INPUT " Enter digitizer logical address (default = 70905) ",Addr !Enter digitizer address
ASSIGN @Dig TO Addr
!Assign @Dig to digitizer address
DIM A(1:1000),Value(1:1000)
!Dimension arrays for values
FOR Chan=1 TO 2
!Loop for both channels
60
70
80
90
Addr=70905
100
CLEAR SCREEN
110
PRINT "AC Common Mode Rejection Ratio Adjustments - Channel";Chan
120
PRINT
130
PRINT "1. Connect AC source to Port";Chan+2;"HI and LO"
140
PRINT "2. Set AC source output to 20.0 Vac PP @ 1 MHz"
150
DISP " Press Continue when ready to start adjustments "
160
PAUSE
170
CLEAR SCREEN
180
!
190
! -------------------- Make measurements ---------------------------
200
!
210 Read: !
220 OUTPUT @Dig;"MEAS"&VAL$(Chan)&":ARR:VOLT? (1000),
0.1,DEF,(@"&VAL$(Chan+2)&")"
230
ENTER @Dig;Value(*)
240
!
250
! ---------------- Compute AC CMRR ---------------------------------
260
270
!
FOR I=1 TO 1000
280
A(I)=Value(I)^2
!Take 1000 readings on specified port
with digitizer set to 0.1V range
!Enter 1000 readings
!Loop to calculate error values
!Calculate error values
290
NEXT I
300
Std_dev=SQR(((1000.0*SUN(A)-SUM(Value)^2))/9.9999E+5)
310
Cmrr=20.0*LGT(7.0714356/Std_dev)
320
!
!Calculate std deviation of errors
!Compute AC CMRR
(continued on next page)
Chapter 4
Adjustments
57
330
!------------------------ Display CMRR values --------------------------
340
!
350
PRINT TABXY(1,1),"AC CMRR Adjustments for Channel";Chan
360
IF Chan=1 THEN
!Channel 1 user adjustments
370
PRINT TABXY(1,4),"1. Adjust C306 for maximum CMRR value"
380
PRINT TABXY(1,5),"2. Press Return key for Channel 2 adjustments"
390
END IF
400
IF Chan=2 THEN
410
PRINT TABXY(1,4),"1. Adjust C406 for maximum CMRR value" !Channel 2 user adjustments
420
PRINT TABXY(1,5),"2. Press Return key to end this program"
430
END IF
440
PRINT TABXY(1,8),"AC Common Mode Rejection Ratio =";DROUND(Cmrr,3);"dB
450
PRINT TABXY(1.5*(Cmrr-65),10),CHR$(252),CHR$(32)
460
PRINT TABXY(1,11),"70 dB 75 dB
470
ON KBD GOTO Compl
480
GOTO Read
80 dB
85 dB
"
90 dB"
!Go to next channel or end program
when user presses keyboard key
!Loop until user presses keyboard key
490 Compl: !
500 NEXT Chan
510 CLEAR SCREEN
520 END
Typical Result
A typical result for Channel 1 follows.
AC CMMR Adjustments for Channel 1
1. Adjust C306 for maximum CMRR value
2. Press Return key for Channel 2 adjustments
AC Common Mode Rejection Ratio = 84.3 dB
70 dB
58
Adjustments
75 dB
80 dB
85 dB
90 dB
Chapter 4
Flatness
Adjustments
This adjustment measures the voltage at 1 kHz (reference value) and the
voltage at 100 kHz, and allows the user to adjust the digitizer so that the
two values are as nearly as possible equal (flat frequency response).
NOTE
Do NOT perform flatness adjustments unless the electronic adjustments
(A/D converter delay constant, zero offset, and gain) for channels 1 and 2
have been performed, the digitizer has passed the DC CMRR test, and the
AC CMRR adjustments have been performed.
Description
As shown in Figure 4-4, for flatness adjustments a 16.0 Vac PP signal @
990 Hz is input to Port 3 HI and is measured to form a reference value.
The input is then changed to 99990 Hz and the value is again measured.
The user adjusts the front-panel Port 3 HI "Svc Only" adjustment until
the value at 100 kHz matches the 1 kHz reference value. This procedure
is repeated for Port 3 LO, Port 4 HI, and Port 4 LO.
Figure 4-4. Flatness Adjustments
Equipment Setup
Chapter 4
• Set up the equipment as shown in Figure 4-5
• Set DC source output to 16.0 Vac @ 990 Hz
Adjustments
59
WARNING
The DC Standard (Datron 4708, Option 20) can produce
dangerous voltages that are present on the terminals. Do not
touch the front (or rear) panel terminals unless you are sure no
dangerous voltage is present.
Figure 4-5. Flatness Adjustments Setup
Test Procedure
1. Make Port 3 HI measurements:
MEAS1:ARR:VOLT? (1000),10.0,DEF,(@3) Set digitizer for ch 1 meas,
1000 readings, 10.0V
range, input on port 3 HI
ENTER statement;A
Store 1000 readings in A
2. Compute CMRR
Rms1 = ABS(MAX(A(*)))/SQRT(2)
RMS value at 1 kHz
Rms2 = ABS(MAX(A(*)))/SQRT(2)
RMS value at 100 kHz
Db=20*LGT(Rms2/Rms1)
Calculate relative gain
3. Repeat test for Port 3 LO
Make connections to port 3 LO
Repeat steps 1 through 3 for channel 2 (port 4 HI and LO)
60
Adjustments
Chapter 4
Example Program
This program allows you to adjust each channel for maximum flatness. The
display is similar to the following. Adjust the appropriate front-panel "Svc
Only" capacitor until the difference between the measured values at 1 kHz
and 100 kHz (relative gain) is minimized (ideally 0 dB).
Relative Gain = 1.3 dB
10! RE-STORE "FLATNESS"
20
!
30
! --------------------- Initial Setup -------------------------------
40
!
50
CLEAR SCREEN
!Factory-set address
70
DIM A(1:1000)
!Dimension array to store 1000 readings
80
INPUT " Enter digitizer logical address (default = 70905) ",Addr !User enters digitizer address
90 ASSIGN @Dig TO Addr
!Assign @Dig to digitizer address
100 FOR Chan=1 TO 2
!Loop for channels 1 and 2
110 FOR Input=1 TO 2
!Loop for 1 kHz and 100 kHz inputs
60
Addr=70905
120
CLEAR SCREEN
130
IF Input=1 THEN
140
PRINT "Flatness Adjustments - Port";Chan+2;"HI"
150
PRINT
160
PRINT "1. Connect AC source to Port";Chan+2;"HI"
170
PRINT "2. Connect BNC shorting cap to Port";Chan+2;"LO"
180
190
PRINT "3. Set AC source output to 16.0 Vac PP"
ELSE
200
PRINT "Flatness Adjustments - Port";Chan+2;"LO"
210
PRINT
220
PRINT "1. Connect AC source to Port";Chan+2;"LO"
230
PRINT "2. Connect BNC shorting cap to Port";Chan+2;"HI"
240
PRINT "3. Set AC source output to 16.0 Vac PP"
250
END IF
260
DISP " Press Continue when ready "
270
PAUSE
280 Retry:
!
290
CLEAR SCREEN
300
FOR Freq=1 TO 2
310
IF Freq=1 THEN PRINT "Set AC source output to 990 Hz"
320
IF Freq=2 THEN PRINT "Set AC source output to 99990 Hz"
330
DISP " Press Continue when ready "
340
PAUSE
350
CLEAR SCREEN
360 !
370 ! -------------------- Make measurements --------------------------------380 !
Chapter 4
Adjustments
61
390
OUTPUT @Dig;"MEAS"&VAL$(Chan)&":ARR:VOLT? (1000), !Make 1000 measurements on the
10.0,DEF,(@"&VAL$(Chan+2)&")"
specified port with the digitizer set to
400
ENTER @Dig;A(*)
410
IF Freq=1 THEN Rms1=ABS(MAX(A(*)))/SQRT(2)
420
IF Freq=2 THEN Rms2=ABS(MAX(A(*)))/SQRT(2)
430
NEXT Freq
440
IF Rms2=Rms1 THEN GOTO Compl
450
Db=20*LGT(Rms2/Rms1)
10.0V range
!Store 1000 readings
!Compute rms value at 1 kHz
!Compute rms value at 100 kHz
!Avoid potential divide by zero error
!Compute relative gain (in dB)
460 !
470 !------------------- Display difference value ----------------------480 !
490
IF Db<.1 THEN GOTO Compl
500
IF Input=1 THEN
510
PRINT "Flatness Adjustments for Port";Chan+2;"HI"
520
PRINT
530
PRINT "Relative Gain (dB) = ";DROUND(Db,3);"dB"
540
PRINT
550
PRINT "1. Adjust port";Chan+2;"HI ""Svc Only"" capacitor"
560
ELSE
570
PRINT "Flatness Adjustments for Port";Chan+2;"LO"
580
PRINT
590
PRINT "Relative Gain (dB) = ";DROUND(Db,3);"dB"
600
PRINT
610
PRINT "1. Adjust port";Chan+2;"LO ""Svc Only"" capacitor"
620
END IF
630
PRINT "2. Press Continue to check new value"
640
ON KBD GOTO Compl
650
PAUSE
660
GOTO Retry
670 Compl:
!User presses keyboard key to go to next
channel or to end program
!
680
IF Input=1 THEN PRINT "Relative Gain for Port";Chan+2;"HI = 0 dB"
690
IF Input=2 THEN PRINT "Relative Gain for Port";Chan+2;"LO = 0 dB"
700
IF Chan=2 AND Input=2 THEN
710
720
730
740
750
760
GOTO End_of_test
ELSE
PRINT "Press Continue for next adjustment"
END IF
PAUSE
NEXT Input
770 NEXT Chan
780 End_of_test:
!
790 PRINT "Flatness Adjustments Completed"
800 END
62
Adjustments
Chapter 4
Chapter 5
Replaceable Parts
Introduction
This chapter contains information to order replaceable parts and/or
exchange modules for the HP E1429A/B digitizers. To order a part or
exchange assembly listed in this chapter, specify the Hewlett-Packard part
number and the quantity required. Send the order to your nearest
Hewlett-Packard Sales and Support Office.
Exchange
Modules
Table 5-1 lists modules that may be replaced on an exchange basis
(Exchange Modules). Exchange modules are available only on a trade-in
basis. Defective modules must be returned for credit. Order modules for
spare parts stock by the new module part number.
Table 5-1. HP E1429A/B Digitizers - Exchange/New Modules
Model
HP E1429A
HP E1429B
NOTE
Replaceable
Parts Lists
Chapter 5
Description
2-Channel 20 MSa/s Digitizer w/Memory
2-Channel 20 MSa/s Digitizer w/Memory
and Local Bus
Exchange Part
Number
New Part
Number
E1429-69201
E1429-69202
E1429-66201
E1429-66202
If an HP E1429A/B digitizer defect can be traced to a fuse or replaceable
mechanical part, replace the fuse and/or part and retest the module. If the
defect cannot be traced to a fuse or replaceable mechanical part, replace
the entire module. Individual printed circuit assemblies (PCA A1 through
A4) cannot be returned for replacement or exchange.
Table 5-2 lists replaceable parts for the HP E1429A/B digitizers. See
"Component Locators" (Figures 5-1 and 5-2) for locations of parts in
Table 5-2. Table 5-3 shows reference designators for parts in Table 5-2,
and Table 5-4 shows the manufacturer code list for the parts.
Replaceable Parts
63
Table 5-2. HP E1429A/B Digitizers Replaceable Parts
Reference
Designator
HP Part
Number
Qty
Description
Mfr
Code
Mfr Part Number
HP E1429A/B HARDWARE PARTS (FIG 5-1)
HDL1
HDL2
HDW11-HDW14
HDW15-HDW18
PNL1
PNL1
E1400-84105
E1400-84106
2950-0054
3050-0604
E1429-00201
E1429-00211
1
1
4
4
1
1
EXT HANDLE KIT-BOTTOM
EXT HANDLE KIT-TOP
NUT-HEX-DBL-CHAM 1/2-28-THD .125-IN-THK
WASHER-FL 7/16 IN .5-IN-ID .75-IN-OD
FRONT COVER (E1429A)
FRONT COVER (E1429B)
28480
28480
28480
86928
28480
28480
E1400-84105
E1400-84106
2950-0054
5710-94-16
E1429-00201
E1429-00211
SCR1-SCR8
SCR9
SCR10
SCR11-SCR12
SCR13-SCR14
SCR15-SCR16
0515-1135
0515-0430
0515-1135
0515-1968
0515-0368
0515-1375
9
1
2
2
2
SCREW M3 X 0.5 25MM-LG FLAT-HD
SCREW M3 X 0.5 6MM-LG PAN-HD
SCREW M3 X 0.5 25MM-LG FLAT-HD
SCREW M2.5 X 0.45 11MM-LG PAN-HD
SCREW M2.5 X 0.45 12MM-LG PAN-HD
SCREW M2.5 X 0.45 6MM-LG FLAT-HD
28480
28480
28480
28480
28480
83486
0515-1135
0515-0430
0515-1135
0515-1968
0515-0368
343-300-02506
SHD1
SHD1
SHD2
SHD3
SHD4
E1429-00601
E1429-00604
E1429-00602
E1429-00603
E1429-00605
1
1
1
1
1
TOP SHIELD (E1429A)
TOP SHIELD (E1429B)
BOTTOM SHIELD
SHIELD
SHIELD RFI/BNC (E1429B)
28480
28480
28480
28480
28480
E1429-00601
E1429-00604
E1429-00602
E1429-00603
E1429-00605
06776
00779
00779
00779
P50L-120S-RR1-TG3022
27676-1
2227676-1
104549-2
75915
18873
18873
18873
06776
00779
06776
81073
R251005T1
67996-612
89602-603
89602-603
DIN-96CPC-SRI-TR
104549-9
P50L-120P-RR1-TG3076
YY22318ST
00779
24931
24931
104550-2
28JR342-1
28JR342-1
00779
104550-8
A1 PCA REPLACEABLE PARTS (FIG 5-2)
A1J101
A1J201- J202
A1J601- J602
A1P101,P201,P301
1252-4857
1250-2012
1250-2012
1252-5406
1
4
3
CONN-POST TYPE 120-CONTACT
CONN-RF BNC RCPT 50-OHM
CONN-RF BNC RCPT 50-OHM
CONN-POST TYPE 20-CONTACT
A2 PCA REPLACEABLE PARTS (FIG 5-2)
A2 F401-F407
A2 J2 - J3
A2 J101- J103
A2 J201- J202
A2 P1-P2
A2 P110-P111
A2 P112
A2 SP601-SP602
2110-0699
1251-5150
1252-4568
1252-4568
1252-1596
1252-4481
1252-4859
3101-2243
7
2
5
2
2
1
2
FUSE-SUBMINIATURE 5A 125V NTD
CONN-POST TYPE 12-CONTACT
CONN-POST TYPE 3-CONTACT
CONN-POST TYPE 3-CONTACT
CONN-POST TYPE 96-CONTACT
CONN-POST TYPE 80-CONTACT
CONN-POST TYPE 120-CONTACT
SWITCH-DIP ROCKER 8-1A 0.05A 30VDC
A3 PCA REPLACEABLE PARTS (FIG 5-2)
A3J101,J201,J301
A3 J302,J305
A3 J402,J405
1252-5404
1250-1846
1250-1846
3
4
CONN-POST TYPE 20-CONTACT
CONN-RF BNC RCPT 50-OHM
CONN-RF BNC RCPT 50-OHM
A4 PCA REPLACEABLE PARTS (FIG 5-2)
A4 J110-J111
64
1252-4572
Replaceable Parts
2
CONN-POST TYPE 80-CONTACT
Chapter 5
Table 5-3. HP E1429A/B Digitizers Reference Designators
Reference Designators
A ................................. assembly
F .......................................... fuse
HD .................................. handle
J .........electrical connector (jack)
MP ..................... misc mech part
P ............... electrical conn (plug)
PNL .................................... panel
SCR .................................. screw
SHD .................................. shield
SP .............. switch (push-button)
Table 5-4. HP E1429A/B Digitizers Code List of Manufacturers
Mfr
Code
00779
06776
18873
Manufacturer Name
Manufacturer Address
AMP INC
ROBINSON NUGENT INC
DUPONT E I DE NEMOURS & CO
SPECIALTY CONNECTOR CO
HEWLETT-PACKARD CO CORPORATE
HARRISBURG
NEW ALBANY
WILMINGTON
FRANKLIN
PA
IN
DE
IN
PALO ALTO
CA
LITTELFUSE INC
GRAYHILL INC
ELCO INDUSTRIES INC
SEASTROM MFG INC
DES PLAINES
LA GRANGE
ROCKFORD
GLENDALE
24931
28480
IL
IL
IL
CA
Zip
Code
US
US
US
US
US
17111
47150
19801
46131
94304
US
US
US
US
60016
60525
61125
91201
75915
81073
83486
86928
Component
Locators
Chapter 5
Figures 5-1 and 5-2 show locations of selected replaceable parts for the
HP E1429A/B digitizers.
Replaceable Parts
65
Figure 5-1. Replaceable Mechanical Parts
66
Replaceable Parts
Chapter 5
Figure 5-2. A1 - A4 PCAs Replaceable Parts
Chapter 5
Replaceable Parts
67
Notes
68
Replaceable Parts
Chapter 5
Chapter 6
Service
Introduction
This chapter contains information to service the HP E1429A/B digitizers,
including recommended repair strategy, troubleshooting guidelines, and
disassembly/repair guidelines.
WARNING
Do not perform any of the service procedures shown unless
you are a qualified, service-trained person, and have read the
WARNINGS and CAUTIONS in Chapter 1.
Equipment
Required
Service Aids
Recommended
Repair Strategy
Equipment required for HP E1429A/B digitizers troubleshooting and repair
is listed in Table 1-1, Recommended Test Equipment. To avoid damage to
the screw head slots, use T8 and T10 Torx drivers as described in the
"Disassembly" section in this chapter.
See Chapter 5 - Replaceable Parts for descriptions and locations of HP
E1429A/B replaceable parts. Service notes and service literature for the
digitizers may be available through Hewlett-Packard. For information,
contact your nearest Hewlett-Packard Sales and Support Office.
The recommended repair strategy for the HP E1429A/B digitizers is module
replacement.
• Before replacing an HP E1429A/B digitizer, check fuses F401
through F407 on the A2 Printed Circuit Assembly (PCA) and check
other replaceable parts listed in Table 5-2.
• If the fault can be traced to a part listed in Table 5-2, repair the fault
and retest the instrument. If not, exchange or replace the entire HP
E1429A/B. (Individual PCAs cannot be exchanged or replaced).
• See "Shipping Guidelines" in Chapter 1 - General Information to
return an HP E1429A/B digitizer to Hewlett-Packard.
Chapter 6
Service
69
Troubleshooting
Guidelines
NOTE
Identifying the
Problem
To troubleshoot an HP E1429A/B digitizer problem, you should first
identify the problem, and then isolate the cause to a replaceable part. See
Chapter 5 - Replaceable Parts for digitizer replaceable parts
If the problem cannot be isolated to a replaceable part listed in Table 5-2,
exchange or replace the entire instrument. Individual PCAs cannot be
exchanged or replaced. See Table 5-1 for exchange part numbers.
Table 6-1 lists some common problems for the HP E1429A/B digitizers,
along with symptoms and possible solutions. If a problem cannot be
identified using these steps, replace or exchange the entire module.
Table 6-1. HP E1429A/B Digitizers Typical Problems
Symptom
Making Visual
Checks
Recommended Action
Non-zero error code in
response to SYST:ERR?
See Appendix C - Error
Messages
Module not responding to
commands.
See "Making Visual Checks"
Module fails verification test
(Chapter 3 - Verification Tests)
See "Testing the Module"
Visual checks for the digitizers include the following. See Table 6-2 for
typical checks.
• Check for heat damage
• Check fuses/switches/jumpers
• Check connector contacts
NOTE
70
Service
See the HP E1429A/B User’s Manual for information on logical address
and IRQ settings. If there are no apparent problems following the visual
checks, run the verification tests in Chapter 3 to see if the module is
defective.
Chapter 6
Table 6-2. HP E1429A/B Digitizers Visual Checks
Test/Check
Reference Designator
Check:
Action/Notes
Heat Damage
--------
Discolored PC board
Damaged insulation
Evidence of arcing
If there is damage, do not
operate the module until you
have corrected the problem.
Fuses/Jumpers/
Switches (A2 PCA)
A2F401 - F407
A2J2
A2J201
A2SP601
A2SP602
Fuse continuity
Jumper position
Jumper position
Logical address setting
Servant area switch
Replace fuses(s) as required
Factory set at IRQ Level 3
Factory set to SECURITY
Factory set to 40
Factory set to 255
Replaceable Parts
See Table 5-2 for
replaceable parts
Bent, damaged connectors
Repair/replace as required
Testing the Module
Disassembly
You can use the tests and checks in Chapter 3 - Verification Tests to
identify a problem with the instrument. See Chapter 5 - Replaceable Parts
for locations of mechanical parts.
To perform digitizer disassembly, you will need a:
• 5/8" (15.875 mm) nut driver
• T-8 TORX driver
• T-10 TORX driver
See the following figures for steps to disassemble a digitizer. Reverse the
steps to reassemble the digitizer.
CAUTION
Chapter 6
Do not handle or disassemble the digitizer module unless you are
familiar with the precautions listed in the "Repair/Maintenance
Guidelines" section of this chapter.
Service
71
1
2
72
Remove Top Shield
Remove Front Panel
Service
Chapter 6
3
4
Remove A3/A4 PCAs
Remove A1/A2 PCAs
Chapter 6
Service
73
Repair /
Maintenance
Guidelines
CAUTION
ESD
Precautions
Guidelines to repair and maintain an HP E1429A/B digitizer follow,
including:
• ESD precautions
• Soldering printed circuit boards
• Post-repair safety checks
Do not touch the digitizer edge connector pins at any time unless you
are actively using a static-free workstation.
Electrostatic discharge (ESD) may damage CMOS and other static-sensitive
devices in the digitizers such as ROM or RAM ICs. This damage can range
from slight parameter degradation to catastrophic failure. When handling
digitizer modules, follow these guidelines to avoid damaging components:
• Always use a static-free work station with a pad of conductive
rubber or similar material when handling module components.
• After you remove a module from the frame, place the module on a
conductive surface to guard against ESD damage.
• Do not use pliers to remove a CMOS device from a high-grip
socket. Instead, use a small screwdriver to pry the device up from
one end. Slowly lift the device up, one pair of pins at a time.
• After you remove a CMOS device from a module, place the device
onto a pad of conductive foam or other suitable holding material.
• If a device requires soldering, be sure the device is placed on a pad
of conductive material. Also, be sure you, the pad, and the soldering
iron tip are grounded to the device. Apply as little heat as possible
when soldering.
Soldering Printed
Circuit Boards
74
Service
The etched circuit boards on digitizer module printed circuit assemblies
(PCAs) have plated-through holes that allow a solder path to both sides of
the insulating material. Soldering can be done from either side of the board
with equally good results. When soldering to any circuit board, keep in
mind the following guidelines:
Chapter 6
CAUTION
Do not use a sharp metal object such as an awl or twist drill, since
sharp objects may damage the plated-through conductor.
• Avoid unnecessary component unsoldering and soldering. Excessive
replacement can result in damage to the circuit board and/or
adjacent components.
• Do not use a high power soldering iron on etched circuit boards, as
excessive heat may lift a conductor or damage the board.
• Use a suction device or wooden toothpick to remove solder from
component mounting holes. When using a suction device, be sure
the equipment is properly grounded to prevent electrostatic
discharge from damaging CMOS devices.
Post-Repair Safety
Checks
NOTE
Chapter 6
After making repairs to digitizer components, inspect the device for any
signs of abnormal internally generated heat, such as discolored printed
circuit boards or components, damaged insulation, or evidence of arcing.
Determine and correct the cause of the condition. Then, run the power-on
self-test to verify that the digitizer module is operational.
As desired, you may want to run the functional and/or performance
verification tests in Chapter 3 - Verification Tests.
Service
75
Notes
76
Service
Chapter 6
Appendix A
CALibration Commands
Command
Summary
This appendix describes the CALibration subsystem commands used for the
HP E1429A/B digitizers. Table A-1 summarizes CALibration commands
for the digitizers.
Table A-1. HP E1429A/B Digitizers CALibration Commands
Command
Description
Page
CALibration [< chan >]:COUNt?
Returns the number of times the digitizer has been
calibrated.
A-2
CALibration [< chan > ]:DATA < block data >
Use to set or query current calibration constants
A-3
CALibration [< chan > ]:DELay
Adjusts delay constant for the A/D converter.
A-5
CALibration [< chan > ]:GAIN [ < readings >
[,< period > [,flag ]]]
Performs gain adjustment using specified number
of readings and sample rate.
A-6
CALibration [< chan >] :SECure:CODE
< code >
Sets code to disable calibration security. Factory
set to E1429.
A-9
CALibration [< chan >] :SECure:STATe
< mode > ,[ < code >]
Enables or disables calibration security.
A-10
CALibration [< chan > ]:STORe
Stores current calibration constants into nonvolatile
RAM.
A-11
CALibration [ < chan > ]:STORe:AUTO
[ < mode > ]
Selects whether calibration constants will be
automatically stored when commands such as
CAL:GAIN and CAL:ZERO complete.
A-12
CALibration [ < chan > ]:VALue < number >
Specifies voltage level to be supplied at input.
Value is then used in subsequent CAL:GAIN or
CAL:ZERO commands.
A-13
CALibration [ < chan > ]:ZERO [ < readings >
[ ,< period > , [ < mode > ]]]
Performs a zero offset adjustment using the
specified number of readings and sample rate.
A-14
*PUD <mask>
Store/retrieve data in nonvolatile protected user
data area.
A-16
Appendix A
CALibration Commands
77
CALibration:COUNt?
Description
CALibration[ < chan > ]:COUNt? returns the number of times the
digitizer has been calibrated. Executing CAL:GAIN, CAL:ZERO, or
CAL:STORe increments the count, so CALibration:COUNt? can be used
to detect accidental or unauthorized HP E1429A/B calibrations.
Executable When Initiated?
yes
Query Command?
query only
Coupled Command?
no
*RST Condition:
unaffected
Parameters
Parameter
Name
Parameter
Type
Range of
Values
Default
Units
chan
numeric
1 or 2
none
• Before using your digitizer, query the calibration count to determine the
Comments
initial value. You may want to record and store the initial count value.
The digitizer stores the calibration count in nonvolatile calibration RAM
that remains even when power if turned OFF. Both channels share the
same counter, so channel 1 and channel 2 return the same result.
• The count increments whenever either channel stores calibration data to
memory. Maximum count value is 2,147,483,647 after which the count
returns to 0.
• Executing CALibration:GAIN or CALibration:ZERO with calibration
security disabled (CALibration:SECure:STATe OFF) and with
CALibration:STORe:AUTO ON increments the calibration count.
• With CALibration:STORe:AUTO ON, a complete calibration of all
input ranges increments the number by several counts. By setting
CALibration:STORe:AUTO to OFF, you can defer storing calibration
constants until CALibration:STORe is sent.
Related Commands
Example
CALibration:GAIN
CALibration:SECure:STATe
CALibration:STORe
CALibration:STORe:AUTO
CALibration:ZERO
Query Calibration Count
CAL:COUN?
78
CALibration Commands
Query calibration count
Appendix A
CALibration:DATA
Description
CALibration[ < chan > ]:DATA <block data > sets/queries calibration
constants. CAL:DATA sends calibration constants to the digitizer in
indefinite or definite length arbitrary block format. CAL:DATA? returns
current calibration constant values in definite length arbitrary block format.
Executable When Initiated?
no
Query Command?
yes
Coupled Command?
no
*RST Condition:
none
Parameters
Comments
Parameter
Name
Parameter
Type
Range of
Values
Default
Units
chan
numeric
1 or 2
none
block data
IEEE 488.2
block data
-2048 to 2047
none
• Sending calibration constants with this command causes the digitizer to
calibrate to the new constants. Error -222; "Data out of range" results if
the constants are not within valid ranges.
• The new calibration constants take effect immediately, but are not saved
to nonvolatile calibration RAM until CALibration:STORe is executed.
• As desired, you can prepare calibration constants tables to be
downloaded whenever the characteristics of the device connected to the
digitizer change. Storage and retrieval from memory of these tables is
then under control of the host controller, external to the digitizer.
• CAL:DATA? returns the current calibration constants for the digitizer.
These may not be the same values stored in nonvolatile calibration
RAM unless CALibration:STORe has previously been executed on
these constants.
• Each channel contains 62 calibration constants, as shown in the
following table. Note that the array index starts with 0.
Appendix A
CALibration Commands
79
HP E1429A/B Digitizers Calibration Constants Definitions
Index
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Contents
Index
offset for 1.0235V range
A to D chip internal setting
A to D chip internal setting
A to D chip internal setting
A to D chip internal setting
A to D chip internal setting
linearity bit 5 left
linearity bit 5 right
linearity bit 6 left
linearity bit 6 right
linearity bit 7 left
linearity bit 7 right
linearity bit 8 left
linearity bit 8 right
linearity bit 9 left
linearity bit 9 right
linearity bit 10 left
linearity bit 10 right
gain msb
gain lsb
conversion delay adjust
trigger level negative
trigger level positive
offset for single-ended .10230 V range
gain msb for single-ended .10230 V range
gain lsb for single-ended .10230 V range
offset for single-ended .2046V range
gain msb for single-ended .2046 V range
gain lsb for single-ended .2046 V range
offset for single-ended .5115 V range
gain msb for single-ended .5115 V range
Related Commands
Example 1
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
Contents
gain lsb for single-ended .5115 V range
offset for differential .10230 V range
gain msb for differential .10230 V range
gain lsb for differential .10230 V range
offset for differential .2046 V range
gain msb for differential .2046 V range
gain lsb for differential .2046 V range
offset for differential .5115 V range
gain msb for differential .5115 V range
gain lsb for differential .5115 V range
offset for differential 1.0230 V range
gain msb for differential 1.0230 V range
gain lsb for differential 1.0230 V range
offset for differential 2.046 V range
gain msb for differential 2.046 V range
gain lsb for differential 2.046 V range
offset for differential 5.115 V range
gain msb for differential 5.115 V range
gain lsb for differential 5.115 V range
offset for differential 10.230 V range
gain msb for differential 10.230 V range
gain lsb for differential 10.230 V range
offset for differential 20.46 V range
gain msb for differential 20.46 V range
gain lsb for differential 20.46 V range
offset for differential 51.15 V range
gain msb for differential 51.15 V range
gain lsb for differential 51.15 V range
offset for differential 102.30 V range
gain msb for differential 102.30 V range
gain lsb for differential 102.30 V range
CALibration:STORe
Sending array of new calibration constants
ASSIGN @Dig TO 70905
!Assign I/O path to 70905
ASSIGN @Digu TO 70905;FORMAT OFF
!Turn FORMAT OFF for
array data
OUTPUT @Dig;"FORM PACK"
!Set PACKed format
CAL1:SEC:STAT OFF,E1429
!Turn calibration security
OFF, assuming factory-set
code of E1429
OUTPUT @Dig USING "#,K";"CAL1:DATA #3124"!Specify 124 bytes
coming (62 constants)
OUTPUT @Digu;Array(*),CHR$(10),END
80
CALibration Commands
!Send array of calibration
constants
Appendix A
Example 2
Query calibration constants on channel 2
DIM Ndig$[1],Count$[9]
!Dimension parameters for
header
ASSIGN @To TO 70905
!I/O path to digitizer
ASSIGN @From TO 70905;FORMAT OFF !I/O Path from digitizer.
Turn FORMAT OFF for
array data
OUTPUT @To;"FORM PACK"
!Set PACKed format
OUTPUT @To;"CAL2:DATA?"
!Query calibration data
ENTER @From USING "#,X,K,K";Ndig$;Count$[1;VAL(Ndig$)]!Strip
the header preceeding data
ALLOCATE INTEGER Cal_data(1:VAL(Count$)/2)!Allocate an array to
hold the data
ENTER @From;Cal_data(*)
!Read the calibration
constants
ENTER @To USING "B";Line_feed
!Strip off leftover line feed
CALibration:DELay
Description
CALibration[ < chan > ]:DELay calibrates the delay constant for both
channels of the A/D converter. Since this calibration determines a nominal
value for 25o C, the CAL:DELay command should be executed at an
ambient temperature as close to 25o C as possible.
Executable When Initiated?
no
Query Command?
no
Coupled Command?
no
*RST Condition:
unaffected
Parameters
Comments
Parameter
Name
Parameter
Type
Range of
Values
Default
Units
chan
numeric
1 or 2
none
• Before executing this command, set both channels to the single-ended
setting and 1.0235 volt range using *RST or CONF1:ARR:VOLT
(1),1.0,(@1) followed by CONF2:ARR:VOLT (1),1.0,(@2).
• This setting was calibrated at the factory. Under normal conditions, it is
not necessary to execute this command again. You may need to do this
calibration is if the fastest sample rate appears to be 10 MHz instead of
20 MHz, especially at higher ambient operating temperatures (such as
50 to 60 degrees C).
• This command calibrates the delay constants for the A/D converters
on both channels of the digitizer.
Appendix A
CALibration Commands
81
• If CALibration:STORe:AUTO is ON the new settings will be stored to
nonvolatile calibration RAM. Calibration security must be OFF
(CAL:SEC:STAT OFF) for the new constants to be permanently stored
in nonvolatile calibration RAM. CALibration:COUNt is incremented
with this command when the values are stored to calibration RAM.
Related Commands
Example:
CALibration:SECure:STATe
CALibration:STORe
CALibration:STORe:AUTO
Adjust calibration delay
CAL:SEC:STAT OFF,E1429
Set calibration security
OFF, assuming factory
code of E1429
CAL:DEL
Adjust calibration delay
for both channels
CALibration:GAIN
Description
CALibration[ < chan > ]:GAIN [ < readings > [, < period > [, < flag > ]]]
performs a gain calibration using a specified number of readings and sample
rate. A linearity calibration is also done on the 1V measurement range with
the single-ended port (port 0 or 2). This linearity calibration may be
disabled by setting the flag parameter to OFF. Omitting the optional flag
parameter will cause linearity calibration to be performed.
Executable When Initiated?
no
Query Command?
no
Coupled Command?
no
*RST Condition:
none
Parameters
Parameter
Name
Parameter
Type
Range of
Values
Default
Units
chan
numeric
1 or 2
none
readings
numeric
100 to 32767 |DEFault (= 1000)
none
period
numeric
reference period to reference
period * 4E8 |DEFault (= 1.0E-4)
seconds
flag
boolean
ON | OFF | defaults to ON
none
Comments
• CALibration:VALue specifies the voltage to be used as the full scale
value for calibration. This voltage must be between 85.0% and 99.5%
of the full scale reading for the current configuration. The 99.5% upper
limit ensures that noise will not cause erroneous full scale (overload)
readings.
82
CALibration Commands
Appendix A
• Before executing CALibration:GAIN do the following steps. If you use
CONFigure, it must be sent first. Otherwise, several settings such as
CALibration:SECure:STATe and CALibration:VALue are reset to their
*RST values.
1. Disable calibration security with CALibration:SECure:STATe
OFF.
2. Use CONFigure or use SENSe:VOLTage:RANGe and
SENSe:FUNCtion to place the digitizer to the desired range
and port.
3. As applicable, set the input filter and impedance to the desired
settings with INPut:FILTer and INPut:IMPedance, respectively.
4. Use CALibration:VALue to set the voltage value to be applied.
This value must be 85% to 99.5% of the full scale input for the
range being calibrated. Since CONFigure resets this setting, do
this after using the CONFigure command.
5. Connect a standard DC voltage input to the port to be
calibrated, with the input value the same as specified with the
CALibration:VALue command.
• MINimum and MAXimum are not allowed with this command.
Optional parameters left blank are filled from left to right. Therefore,
you may need to use the DEFault syntax to note that a parameter has
been defaulted. For example, to default the number of readings and
specify a sample rate, the command would appear as:
CAL:GAIN DEF,.05,one
• CALibration:GAIN forces the internal reference (20 MHz) oscillator to
be used. Sample rates are attained using that reference.
• The default number of readings is 1000, and the default period is 1.0E-4
seconds. These values were selected so that the product of the two is a
period that is an integral multiple of both 50 Hz and 60 Hz line cycles
(.1 second).
• The product of the period and number of readings is checked to see if it
exceeds 10 seconds. If so, Error -221; "Settings conflict; Calibration
time too long" occurs.
• When calibrating gain on differential ports, the error "All readings have
same value in cal_mean routine" could occur. The most likely cause of
this error is that the two differential inputs on the port are not grounded
properly, and a common mode overload is occurring.
Appendix A
CALibration Commands
83
• Normally, new gain values are automatically stored in nonvolatile
calibration RAM. However, if CALibration:STORe:AUTO OFF is set,
the new gain values are stored to calibration RAM only when
CALibration:STORe is executed.
84
Related Commands
CALibration:SECure:STATe
CALibration:STORe
CALibration:STORe:AUTO
CALibration:VALue
Example
Performing gain calibration
CALibration Commands
CONF:ARR:VOLT (100),4.8,DEF,(@1)
Configure for 100 readings
on the 5V range.
CAL:SEC:STAT OFF,E1429
Disable calibration
security, assuming security
code E1429
CAL:STOR:AUTO OFF
Disable automatic storage
of calibration constants
CAL1:VAL 4.8
Set value to > 85% of
positive full scale on 5 V
range
CAL1:GAIN DEF,DEF
Calibrate channel 1 for
gain using default sample
rate and number of points.
Linearity is not done since
this is not the 1V range.
CAL1:STOR
Store new gain settings
into calibration RAM.
Appendix A
CALibration:SECure:CODE
Description
CALibration[ < chan >]:SECure:CODE < code > sets the code
required to disable calibration security. Calibration security must be
previously disabled to use this command.
Executable When Initiated?
yes
Query Command?
no
Coupled Command?
no
*RST Condition:
unaffected
Parameters
Comments
Parameter
Name
Parameter
Type
Range of
Values
Default
Units
chan
numeric
1 or 2
none
code
character data
1 to 12 characters
none
• Valid calibration security codes must begin with a letter and can contain
letters, digits, and underscores. Lower case letters are automatically
converted to upper case.
• The calibration code is shared by both channels. The digitizer stores the
security code in its nonvolatile calibration RAM, and the code remains
in RAM even with power off.
• If calibration security has not been previously disabled (with
CALibration:SECure:STATe OFF), Error 311, "Calibration security on"
is generated. You must know the current security code to disable
calibration security.
• The factory-set calibration security code is E1429. Before using your
digitizer, you should change the code to prevent unauthorized
calibration. Record the new security code and store in a secure place. If
you forget the new code, defeating security requires instrument
disassembly.
Related Commands
Example
Appendix A
CALibration:SECure:STATe
Changing the calibration security code
CAL:SEC:STAT OFF,E1429
Disable security for both
channels
CAL:SEC:CODE NEW_CODE
Set new security code for
both channels
CAL:SEC ON
Reenable security on both
channels
CALibration Commands
85
CALibration:SECure:STATe
Description
CALibration[< chan >]:SECure:STATe < mode >,[< code >] enables or
disables calibration security. Disable calibration security to calibrate the
digitizer, change the security code, or to change protected user data.
Executable When Initiated?
yes
Query Command?
yes
Coupled Command?
no
*RST Condition:
unaffected
Parameters
Parameter
Name
Parameter
Type
Range of
Values
Default
Units
chan
numeric
1 or 2
none
mode
boolean
OFF|0|ON|1
none
code
character data
1 to 12 characters
none
• This command enables/disables calibration security for both channels
Comments
simultaneously. The code parameter must be present to disable the
security, or Error -109,"Missing parameter" is generated.
• The code value must match the currently programmed code or Error
-224,"Illegal parameter value" is generated. A 1 second delay occurs
before the digitizer executes any subsequent commands.
• To enable calibration security, the code parameter is not required, but is
checked if it is present. If an incorrect code is supplied, Error -224,
"Illegal parameter value" is generated.
• Security must be disabled to calibrate the digitizer, or to use the *PUD
command.
Related Commands
Example
CALibration:GAIN
CALibration:SECure:CODE
CALibration:STORe
CALibration:ZERO
*PUD
Disabling calibration security
CAL:SEC:STAT OFF,E1429
86
CALibration Commands
Disable security, assuming
factory-set security code
Appendix A
CALibration:STORe
Description
CALibration[< chan >]:STORe stores current calibration constants into
nonvolatile calibration RAM.
Executable When Initiated?
no
Query Command?
no
Coupled Command?
no
*RST Condition:
none
Parameters
Comments
Parameter
Name
Parameter
Type
Range of
Values
Default
Units
chan
numeric
1 or 2
none
• CALibration:SECure:STATe must be OFF before executing this
command.
Related Commands
Example
CALibration:COUNt?
CALibration:DATA
CALibration:SECure:STATe
CALibration:STORe:AUTO
Sending and storing new calibration constants
ASSIGN @Dig TO 70905
Assign I/O path to 70905
ASSIGN @Digu TO 70905;FORMAT OFF
Turn FORMAT OFF for
array data
OUTPUT @Dig;"FORM PACK"
Set PACKed format
CAL1:SEC:STAT OFF,E1429
Turn calibration security
OFF, assuming factory
code of E1429
OUTPUT @Dig USING "#,K";"CAL1:DATA #3124" Specify 124 bytes
coming (62 constants)
Appendix A
OUTPUT @Digu;Array(*),CHR$(10),END
Send array of calibration
constants
OUTPUT @Dig;"CAL:STOR"
Store calibration constants
in nonvolatile RAM
CALibration Commands
87
CALibration:STORe:AUTO
Description
CALibration[< chan >]:STORe:AUTO <mode> selects whether
calibration constants will be stored when commands such as
CALibration:GAIN and CALibration:ZERO complete.
Executable When Initiated?
yes
Query Command?
yes
Coupled Command?
no
*RST Condition:
mode =
ON
Parameters
Parameter
Name
Parameter
Type
Range of
Values
Default
Units
chan
numeric
1 or 2
none
mode
boolean
ON|1|OFF|0
none
• Enabling CAL:STOR:AUTO for either channel enables storage for both
Comments
channels.
Related Commands
Example
CALibration:GAIN
CALibration:SECure:STATe
CALibration:STORe
CALibration:ZERO
Turn automatic storage of calibration constants OFF
CAL:STOR:AUTO OFF
88
CALibration Commands
Disable automatic storage
of calibration constants
Appendix A
CALibration:VALue
Description
CALibration[< chan >]:VALue < number > specifies the voltage level
to be supplied at the input. This voltage value is then used in subsequent
CALibration:GAIN or CALibration:ZERO commands.
Executable When Initiated?
no
Query Command?
yes
Coupled Command?
no
*RST Condition:
number =
1.0185
Parameters
Comments
Parameter
Name
Parameter
Type
Range of
Values
Default
Units
chan
numeric
1 or 2
none
number
numeric
-101.80 to 101.85
volts
• The following table shows allowable CALibration:VALues closest
to full scale for the specified voltage range.
Appendix A
Maximum Gain
Calibration Values (V)
Voltage Range
(Volts)
Allowable
Ports
-.10180 and .10185
0.1023
1,2,3,4
-.2036 and .2037
0.2046
1,2,3,4
-.5090 and .50925
0.5115
1,2,3,4
-1.0180 and 1.0185
1.023
1,2,3,4
-2.036 and 2.037
2.046
3,4
-5.090 and 5.0925
5.115
3,4
-10.180 and 10.185
10.23
3,4
-20.360 and 20.370
20.46
3,4
-50.900 and 50.925
51.15
3,4
-101.80 and 101.85
102.3
3,4
< -48.925 and > 48.975
102.3
3,4
CALibration Commands
89
• The digitizer cannot distinguish between a value which is exactly full
scale and an overload - both cases generate the same measured value.
Therefore, the voltage specified for CALibration:VALue must be at
least 85% of full scale and cannot be closer than 10 counts from
absolute full scale (approximately 99.5% of full scale)
• Calibration values on the 102.35 volt range have a special low end
allowed, so that voltages much less than full scale may be used to
calibrate gain on this range. Values < -48.975 and > 48.975 are
accepted as legal values for calibrating the 102.35 volt range.
Related Commands
Example
CALibration:GAIN
Setting calibration value
CAL2:VAL 5.00
Specified value to be input
to Channel 2 is 5.00 V
CALibration:ZERO
Description
CALibration[< chan >]:ZERO [< readings >[,< period >,[< mode >]]]
performs a zero offset calibration using a specified number of readings and
sample rate on the specified range(s).
Executable When Initiated?
no
Query Command?
no
Coupled Command?
no
*RST Condition:
none
Parameters
Parameter
Name
Parameter
Type
Range of
Values
Default
Units
chan
numeric
1 or 2
none
readings
numeric
100 to 32767 |DEFault (= 1000)
none
period
numeric
reference period to reference
period * 4E8 |DEFault (= 1.0E-4)
seconds
mode
discrete
ALL |ONE
none
Comments
• When this command completes, the new calibration constants are
automatically stored to nonvolatile calibration RAM unless
CALibration:STORe:AUTO OFF is set.
90
CALibration Commands
Appendix A
• Before executing CALibration:ZERO, do the following steps:
1. If mode is not ALL, use CONFigure or
SENSe:VOLTage:RANGe and SENSe:FUNCtion to place the
digitizer to the desired range and port.
2. Program the input filter and impedance (if applicable) to the
desired settings with INPut:FILTer and INPut:IMPedance,
respectively.
3. To automatically store the new constants in nonvolatile
calibration RAM when CAL:ZERO completes, set
CALibration:STORe:AUTO ON, and turn calibration security
OFF.
4. To store new constants only after a complete calibration, set
CALibration:STORe:AUTO OFF and use CALibration:STORe
to store the constants.
• MINimum and MAXimum are not allowed with this command.
• Optional parameters left blank are filled from left to right. Therefore,
you may need to use the DEFault syntax to show that a parameter has
been defaulted. For example, to default the number of readings and
specify a sample rate, the command would appear as:
CAL:ZERO DEF, .05, ONE
• CALibration:ZERO forces the internal reference (20 MHz) oscillator to
be used. Sample rates are attained using that reference.
• The default number of readings is 1000 and the default period is 1.0E-4
seconds, so that the product of the two is a period is an integral multiple
of both 50 Hz and 60 Hz line cycles (0.1 second).
• The product of the period and number of readings is checked. If it
exceeds 10 seconds, Error -221; "Settings conflict; Calibration time too
long" occurs.
• The default <mode> is ONE, which calibrates using the current settings
of SENSe:VOLTage:RANGe and SENSe:FUNCtion. Specifying
<mode> ALL performs a zero calibration on all voltage range settings
for both ports on the specified channel.
Related Commands
Appendix A
CALibration:GAIN
CALibration:SECure:STATe
CALibration:VALue
CALibration Commands
91
Example
Performing a zero calibration
CAL:SEC:STAT OFF,E1429
Disable security, assuming
factory-set security code
CAL1:ZERO DEF,DEF,ALL
Calibrate channel 1 using
default sample rate and
number of points, and
calibrate all gain ranges
on ports 1 and 3.
*PUD
Description
*PUD < mask > stores specified data in digitizer nonvolatile calibration
RAM. The data must be sent in IEEE-488.2 definite or indefinite block
format. Calibration security must have previously been disabled.
The query form returns the current protected user data in IEEE-488.2
definite block format. The query form can be executed regardless of the
state of calibration security.
NOTE
When shipped from the factory, the protected user data area contains the
date of the digitizer’s last calibration.
Executable When Initiated?
yes
Query Command?
yes
Coupled Command?
no
*RST Condition:
unaffected
Parameters
Parameter
Name
Parameter
Type
Range of
Values
Default
Units
mask
block data or
string
0 through 63
characters
none
• Calibration security must have previously been disabled to send data
Comments
to the protected user data area.
• If there is no data in protected user memory, Error -312,"PUD memory
lost" occurs.
Related Commands
CALibration:SECure:STATe
Example
Sending protected user data
*PUD#229Last Calibration: 27 May 1993
92
CALibration Commands
Send information to
protected user data area
Appendix A
Appendix B
Calculating Digitizer Accuracy
Introduction
This appendix shows how HP E1429A/B digitizer accuracy, source
equipment measurement uncertainty, and test accuracy ratio (TAR) values
are defined and calculated for the performance verification tests for the
digitizers.
See Table 3-1, " HP E1429A/B Digitizers Performance Test Record " for
1-year specification values of digitizer accuracy, 90-day specification
values for the Datron 4708 measurement uncertainty, and test accuracy
ratios (TARs).
NOTE
Digitizer Accuracy
Definition
Measurement
Uncertainty Definition
Test Accuracy Ratio
(TAR) Definition
Digitizer accuracy, measurement uncertainty, and test accuracy ratios in
Table 3-1 are valid ONLY for the specified test conditions and assumptions
described in this manual.
Digitizer accuracy is the expected accuracy of the measurement due
ONLY to the digitizer. The "Minimum" entry in Table 3-1 is the lower
value of digitizer accuracy, while the "Maximum" entry is the upper value
of digitizer accuracy. If a measured reading is between the Minimum and
Maximum values in Table 3-1, the test passes for this input.
Measurement Uncertainty is the expected accuracy of the source used
to input signals to the multimeter. Since the Datron 4708 Autocal
Multifunction Standard is the source used for inputs, the measurement
uncertainty is that of the Datron 4708.
Test Accuracy Ratio (TAR) for the digitizers is defined by:
TAR =
Maximum Value − Input
Measurement Uncer tainty
where Maximum = largest amount of variation from the expected reading
(the input), and measurement uncertainty is that of the test equipment
(Datron Standard). If a TAR exceeds 10:1, the entry in Table 3-1 is
">10:1".
Appendix B
Calculating Digitizer Accuracy
93
Digitizer
Accuracy
Calculations
For the HP E1429A/B digitizers performance verification tests, DC voltage
accuracy is defined using the 1-year specifications in Appendix A Specifications of the HP E1429A/B User’s Manual. The assumed test
conditions are:
• 1 year since the last adjustment
o
o
• Operating temperature 23 C ± 5 C
• At least one hour warmup for the source
DC Voltage
Accuracy Equations
From Appendix A - Specifications of the HP E1429A/B User’s Manual, for
single-ended inputs (ports 1 and 2), DC voltage 1-year accuracy = ± 0.4%
of reading ± 0.25% of peak-to-peak full-scale. For differential inputs (ports
3 and 4), DC voltage 1-year accuracy = ± 0.5% of reading ± 1.0% of peakto-peak full-scale.
NOTE
For single-ended port inputs, DC Accuracy is specified for the average of
100 readings, with CAL:ZERO performed within 24 hours prior to reading
in a stable environment. For differential port inputs, DC Accuracy is
specified for the average of 100 readings with inputs terminated in <1 kΩ,
with CAL:ZERO performed within 24 hours prior to reading in a stable
environment.
Example: Calculate
Single-Ended Port DCV
Accuracy
For this example, assume a 0.5 Vdc input to Port 1 or 2, with the digitizer
set to the -0.51125V to +0.5115V range. From Appendix A - Specifications
of the HP E1429A/B Digitizers User’s Manual, DCV Accuracy = ± 0.4% of
reading ± 0.25% of peak-to-peak full scale.
For a 0.5 Vdc input, DC Accuracy = ± [(0.004 x 0.5) + 0.0025 x (0.5115 (-0.51125)] = ± 0.00456 Vdc. Thus, in Table 3-1 Maximum = 0.5 + 0.00456
= 0.50456 Vdc and Minimum = 0.5 - 0.00456 = 0.49544 Vdc.
Example: Calculate
Differential Port DCV
Accuracy
For this example, assume a 5.0 Vdc input to Port 3 or 4, with the digitizer
set to the -5.1125V to +5.115V range. From Appendix A - Specifications
of the HP E1429A/B Digitizers User’s Manual, DC Accuracy = ± 0.5%
of reading ± 1.0% of peak-to-peak full scale.
For a 5.0 Vdc input, DCV Accuracy = ± [(0.005 x 5.0) + 0.01 x (5.115 (-5.1125)] = ± 0.127 Vdc. Thus, in Table 3-1 Maximum = 5.0 + 0.127 =
5.127 Vdc and Minimum = 5.0 - 0.127 = 4.873 Vdc.
94
Calculating Digitizer Accuracy
Appendix B
Measurement
Uncertainty
Calculations
Measurement uncertainties for the Datron 4708 source are calculated using
the 90-day accuracy specifications in the Datron 4708 User’s Handbook.
Measurement Uncertainty = Datron Accuracy + Calibration Uncertainty,
where Datron Accuracy (ppm) = Accuracy Relative to Calibration
Standards = ± (ppm OUTPUT + ppm FS) and FS = 2 x range for all ranges.
The assumed test conditions are:
o
o
• Temperature of 23 C ± 1 C
• Maximum of 90 days since calibration
Calculate DCV
Measurement
Uncertainty
From Section 6 - Specifications of the Datron 4708 User’s Handbook,
DC Voltage (Option 10) Accuracy follows, where Datron Accuracy =
± (ppm OUTPUT + ppm FS).
Datron Range
(Volts)
1.0000000 V
10.000000 V
100.00000 V
Example: Calculate DC
Voltage Measurement
Uncertainty
Appendix B
Datron
Accuracy
(ppm)
2 + 0.4
1 + 0.15
2 + 0.25
Calibration
Uncertainty
(ppm)
2
1.5
2
Measurement
Uncertainty Equation
(in µ V)
4.0 x Input (in V) + 0.8
2.5 x Input (in V) + 3.0
4.0 x Input (in V) + 50.0
Since Measurement Uncertainty = Datron Accuracy + Calibration
Uncertainty, for a 5.0 Vdc OUTPUT and 10.000000 V range, the
Measurement Uncertainty (µV) = ± [(1.0 x 5.0) + (2 x 0.15 x 10) +
(1.5 x 5.0)] = ± 15.5 µV = ± 1.55 E-5 V.
Calculating Digitizer Accuracy
95
Test Accuracy
Ratio (TAR)
Calculations
For the HP E1429A/B digitizers, Test Accuracy Ratio (TAR) is:
TAR =
Maximum − Input
Measurement Uncertainty
where Maximum, Input and Measurement Uncertainty are in Vdc.
Example: Calculate
Single-Ended Port TAR
For this example, assume a 0.5 Vdc input to Port 1 or 2 with the digitizer
set to the -0.51125V to +0.5115V range. From Table 3-1 Maximum =
0.50546 Vdc. If the Datron is set to the 1.0 Vdc range, Measurement
Uncertainty (µV) = ± [(2.0 x 0.5) + (2 x 0.4 x 1) + (2 x 0.5)] =
± 2.8 µV = ± 2.8E-6 Vdc. Thus:
TAR = (0.50546 - 0.50000)/2.8E-6 = 1950:1
Since this value is >10:1, the entry in Table 3-1 is ">10:1".
Example: Calculate
Differential Port TAR
For this example, assume a 5.0 Vdc input to Port 3 or 4, with the digitizer
set to the -5.1125V to +5.115V range. Then, from Table 3-1 the Maximum
value = 5.127 Vdc. If the Datron is set to the 10.0 Vdc range, Measurement
Uncertainty (µV) = ± [(1.0 x 5.0) + (2 x 0.15 x 10) + (1.5 x 5.0)] =
± 15.5 µV = ± 1.55E-5 Vdc. Thus:
TAR = (5.127 - 5.000)/1.55E-5 = 8193:1
Since this value is >10:1, the entry in Table 3-1 is ">10:1".
96
Calculating Digitizer Accuracy
Appendix B
Appendix C
Error Messages
Introduction
This appendix lists HP E1429A/B digitizers error messages.
Digitizer Error
Messages
Table C-1 lists HP E1429A/B digitizers error messages.
Table C-1. HP E1429A/B Error Messages
Code
Message
Description
-101
Invalid character
Unrecognized character in parameter.
-102
Syntax error
Command missing a space or comma between parameters.
-103
Invalid separator
Parameter is separated by a character other than a comma.
-104
Data type error
The wrong data type (number, character, string, expression) was
used when specifying the parameter.
-105
GET not allowed
An HP-IB Group Execute Trigger was included in a command
string sent to the digitizer.
-108
Parameter not allowed
More parameters were received than expected for the command
header.
-109
Missing parameter
Command requires a parameter or parameters.
-112
Program mnemonic too long
Command keyword >12 characters.
-113
Undefined header
Command header (keyword) was incorrectly specified.
-121
Invalid character in number
A character other than a comma or number is in the middle of
a number.
-123
Exponent too large
Then magnitude of the exponent is larger than 32000.
-124
Too many digits
More than 255 digits were used to specify a number.
-128
Numeric data not allowed
A number was specified when one is not allowed.
-131
Invalid suffix
Parameter suffix was incorrectly specified (e.g., 10 MZ rather
than 10 MHz).
Appendix C
Error Messages
97
Table C-1. HP E1429A/B Error Messages (cont’d)
-138
Suffix not allowed
Parameter suffix is specified when one is not allowed.
-141
Invalid character data
Discrete parameter specified is not a valid choice.
-144
Character data too long
A character data type parameter is >12 characters.
-148
Character data not allowed
Discrete parameter was specified when another type (e.g.,
numeric, boolean) is required.
-151
Invalid string data
The string data specified (such as for the OUTPut:ECLTrg:FEED
<source> command) is not a valid choice.
-158
String data not allowed
A string was specified when another parameter type (i.e., discrete,
numeric, boolean) is required.
-161
Invalid block data
The number of bytes in a definite length data block does not equal
the number of bytes indicated by the block header.
-168
Block data not allowed
Block data was specified when another parameter type
(i.e., discreter, numberic, boolean) is required.
-171
Invalid expression
The expression used to calculate a parameter value is invalid.
-178
Expression data not allowed
An expression cannot be used to calculate a parameter value.
-181
Invalid outside macro def
A macro parameter placeholder ($< number) was encountered
outside of a macro definition.
-183
Invalid inside macro def
A command was encountered that is not allowed inside a macro.
-184
Macro parameter error
A command inside the macro definition had the wrong number
or wrong type of parameters.
-211
Trigger ignored
A trigger was received and the digitizer was not in the
wait-for-trigger state. Or, a trigger was received from a source
other than the specifiied source.
-212
Arm ignored
An arm was received and the digitizer was not in the wait-for-arm
state. Or, an arm was received from a source other than the
specified source.
-213
Init ignored
INITiate:IMMediate received while the digitizer was initiated.
-214
Trigger deadlock
Readings cannot be retrieved using FETCh? or READ? because
TRIGger:STARt:COUNt INFinite is set. Also occurs with READ?
and TRIGger:STARt:SOURce HOLD or TRIGger:STARt:SOURce
BUS set.
-215
Arm deadlock
Readings cannot be retrieved using FETCh? or READ? because
ARM:STARt:COUNt INFinite is set. Also occurs with READ? and
ARM:STARt:SOURce BUS, or ARM:STARt:SOURce OFF set.
98
Error Messages
Appendix C
Table C-1. HP E1429A/B Error Messages (cont’d)
-221
Settings conflict
Refer to the statement appended to the "Settings conflict" message
for a description of the conflict and how it was resolved.
-222
Data out of range
Parameter value is out of range for any digitizer configuration.
-224
Illegal parameter value
An exact value, from a list of possible choices, was expected.
-230
Data corrupt or stale
Attempting to FETch? data from the digitizer following a reset or
other digitizer configuration change.
-231
Data questionable
Reading accuracy is questionable. An example is when the
expected value and resolution parameters of the CONFigure or
MEASure command are specified. If the resolution is too fine for
the expected value, this error occurs.
-240
Hardware error
The command could not be executed due to a hardware failure.
-270
Macro error
*RMC <name> was executed but the name is not defined.
-271
Macro syntax error
A syntax error occurred among the commands within the macro.
-272
Macro execution error
Macro program data sequence could not be executed due to a
syntax error within the macro definition.
-273
Illegal macro label
The macro label defined in the *DMC command was too long,
the same as a common command keyword, or contained invalid
header syntax .
-274
Macro parameter error
The macro definition improperly used a macro parameter
placeholder.
-275
Macro definition too long
The commands within the macro could not be executed because
the string or block contents were too long.
-276
Macro recursion error
A macro program data sequence could not be executed because
the sequence leads to the execution of a macro being defined.
-277
Macro redefinition not
allowed
A macro label in the *DMC command could not be executed
because the macro label was already defined.
-278
Macro header not found
A legal macro label in the *GMC? query could not be executed
because the header was not previously defined.
-312
PUD memory lost
The protected user data saved by the *PUD command has been
lost.
-313
Calibration memory lost
The nonvolatile calibration data used by the *CAL command has
been lost.
-330
Self-test failed
Note the information associated with the message for a description
of the failure.
-350
Queue overflow
The digitizer error queue is full and additional errors have occurred.
Appendix C
Error Messages
99
Table C-1. HP E1429A/B Error Messages (cont’d)
-410
Ouery INTERRUPTED
The digitizer was sent a command before it was finished
responding to a query command.
-420
Query UNTERMINATED
The controller (computer) attempted to read a query response from
the digitizer without having first sent a complete query command.
-430
Query DEADLOCKED
The digitizer’s input and output buffers are full and the digitizer
cannot continue.
-440
Query UNTERMINATED
after indefinite response
Occurs when the *IDN? query is not the last query executed in a
command string.
1002
Cal security enabled
Calibration security must be disabled to calibrate the digitizer, to
read or write calibration data, to change the security code, or to
change protected user data.
1004
Cal write fail
Writing calibration or protected user data (*PUD) to nonvolatile
memory failed.
1005
Error during CAL
An error occurred during calibration. Refer to the statement
appended to this message for a description of the error.
1007
Cal security defeated
A jumper was moved to defeat calibration security.
1008
Error during zero cal
An error occurred during calibration of the zero offset. Refer to the
statement appended to this message for a description of the error.
1009
Error during gain cal
An error occurred during gain calibration. Refer to the statement
appended to this message for a description of the error.
1010
Error during linearity cal
An error occurred during linearity calibration. Refer to the
statement appended to this message for a description of the error.
1015
A/D control reg not resp
The serial interface register was not working properly at power-on.
1016
Illegal during LBUS or VME
memory transfer
The command cannot be executed while a VME bus or Local bus
data transfer is in progress.
1017
Battery too low, data may
be lost
Battery does not have sufficient charge to maintain memory over
an extended period. Error occurs when readings are taken, when
the battery is enabled/disabled, or during the self-test.
1018
Battery-backed data corrupt
Error is due to low battery charge, or if the battery is enabled after
readings are in memory.
1213
Illegal when initiated
Command cannot be initiated while digitizer is INITiated.
2003
Memory addres incorrect
Address specified by DIAG:POKE or DIAG:PEEK? is not valid.
2004
Invalid address for
32-bit access
Attempting a 32-bit read from an odd-numbered address.
2007
Bus error
Error during DIAG:POKE or DIAG:PEEK?
100
Error Messages
Appendix C
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