HP E1563A, E1564A User Manual

Table of Contents

HP E1563A and HP E1564A Digitizer

HEWLETT-PACKARD WARRANTY STATEMENT ..............................................3

Safety Symbols ...........................................................................................................4

WARNINGS.................................................................................................................4

Declaration of Conformity............................................................................................5

WARNINGS.................................................................................................................6

Reader Comment Sheet ................................................................................................7

Chapter 1

Digitizer Module Set-up ................................................................................................9

Using This Chapter.............................................................................. .........................9

Installing the Digitizer in a Mainframe.......................................................................15

Cable Connector Assembly Instructions.....................................................................20

Chapter 2

Digitizer Application Information ..............................................................................25

Using this Chapter ......................................................................................................25

Digitizer Block Diagrams...........................................................................................25

Power-on and Reset State...........................................................................................27

Triggering the Digitizer..............................................................................................29

Input Overload Condition...........................................................................................34

HP E1563A and E1564A Digitizer Application Examples........................................35

Chapter 3

Digitizer Command Reference ...................................................................................39

ABORt........................................................................................................................42

CALCulate..................................................................................................................43

CALibration................................................................................................................47

DIAGnostic.................................................................................................................55

FORMat......................................................................................................................63

INITiate.......................................................................................................................64

INPut...........................................................................................................................66

OUTPut.......................................................................................................................68

[SENSe:].....................................................................................................................70

SAMPle.......................................................................................................................78

STATus.......................................................................................................................83

SYSTem......................................................................................................................87

TEST...........................................................................................................................88

TRIGger......................................................................................................................94

IEEE 488.2 Common Command Quick Reference..................................................100

Contents 1

Appendix A

HP E1563A and E1564A Digitizer

Specifications ..............................................................................................................111

Appendix B

HP E1563A and E1564A

About This Appendix................................................................................................113

Program Timing and Execution................................................................................130

Appendix C

HP E1563A and E1564A Digitizer

Error Messages ..........................................................................................................139

Execution Errors.......................................................................................................139

Self-Test Errors.........................................................................................................144

Calibration Errors .....................................................................................................144

Appendix D

HP E1563A and E1564A

Verification Tests .......................................................................................................145

Introduction...............................................................................................................145

Verification Tests......................................................................................................146

Performance Verification Test Programs .................................................................146

Functional Test .........................................................................................................147

Performance Verification.......................................... ......... .......................................148

Performance Test Record................................. ......... ................................................152

Appendix E

HP E1563A and E1564A

Adjustments ................................................................................................................157

Introduction...............................................................................................................157

Adjustment Procedures.............................................................................................158

2 Contents

HEWLETT-PACKARD WARRANTY STATEMENT

HP PRODUCT: HP E1563A 2-Channel/E1564A 4-Channel Digitizer DURATION OF WARRANTY: 3 years

1. HP warrants HP hardware, accessori es and supplies against defects in materials and workmanship for the period specified above. If HP receives notice o f such defects during the warranty peri od, HP will, at its option, either repair or replace products which prove to be defective. Replacement products may be either new or like-new.

2. HP warrants that HP software will not fail to execut e its programming instructions, for the period specified above, due to defects in material and workmanship when properly installed and used. If HP receives notice of such defe cts during the warranty period, HP will replace software media which does not execute its programming instructions due to such defects.

3. HP does not warrant that the operation of HP products will be interrupted or error free. If HP is unable, within a reasonable time, to repair or replace any product to a condition as warranted, customer will be entitled to a refund of the purchase price upon prompt return of the product.

4. HP products may con tain remanufactured parts equivalent to new in performance or may have been subject to incidental use.

5. The warranty period begins on the date of delivery or on the date of installation if installed by HP. If customer schedules or dela ys HP installation more than 30 days after delivery, warranty begins on the 31st day from delivery.

6. Warranty does not apply to defects resulting from (a) improper or inadequate maintenance or calibration, (b) software, interfacing, parts or supplies not supplied by HP, (c) unauthorized modification or misuse, (d) operation outside of the published environmental specifications for the product, or (e) improper site preparation or maintenance.

7. TO THE EXTENT ALLOWED BY LOCAL LAW, THE ABOVE WARRANTIES ARE EXCLUSIVE AND NO OTHER WARRANTY OR CONDITION, WHETHER WRITTEN OR ORAL, IS EXPRESSED OR IMPLIED AND HP SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OR CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, AND FITNESS FOR A PARTICULAR PURPOSE.

8. HP will be liable for damage to tangible property per incident up to the greater of $300,000 or the actual amount paid for the product that is the subject of the claim, an d for damages for bodily injury or death, to the extent that all su ch damages are determined by a court of competent jurisdiction to have been directly ca used by a defective HP product.

9. TO THE EXTENT ALLOWED BY LOCAL LAW, THE REMEDIES IN THIS WARRANTY STATEMENT ARE CUSTOMER’S SOLE AND EXLUSIVE REMEDIES. EXCEPT AS INDICATED ABOVE, IN NO EVENT WILL HP OR ITS SUPPLIERS BE LIABLE FOR LOSS OF DATA OR FOR DIRECT, SP ECIAL, INCIDENTAL, CONSEQUENTIAL (INCLUDING LOST PROFIT OR DATA), OR OTHER DAMAGE, WHETHER BASED IN CONTRACT, TORT, OR OTHERWISE.

FOR CONSUMER TRANSACTIONS IN AUSTRALIA AND NEW ZEALAND: THE WARRANTY TERMS CONTAINED IN THIS STATEMENT, EXCEPT TO THE EXTENT LAW FULLY PERM ITTED, DO NOT EXCLUDE, RESTRICT OR MODIFY AND AR E IN ADDITION TO THE MANDATORY STATUTORY RIGHTS APPLICABLE TO THE SALE OF THIS PRODUCT TO YOU.

U.S. Government Restricted Rights

The Software and Documentation have been developed entirely at private expense. They are delivered and licensed as "commercial computer software" as defined in DFARS 252.227- 7013 (Oct 1988), DFARS 252.211-7015 (May 1991) or DFARS 252.227-7014 (Jun

1995), as a "commercial item" as defined in FAR 2.101(a), or as "Restricted computer soft ware" as defined in FAR 52.227-19 (Jun

1987)(or any equivalent agency regulation or contract clause), whichever is applicable. You have only those rights provided for such Software and Documentation by t he applicable FAR or DFARS clause or the HP standard software agreement for the product involved.

HP E1563A 2-Channel/E1564A 4-Channel Digitizer User's SCPI Programming Manual

Copyright © 1998 Hewlett-Packard Company. All Rights Reserved.

Edition 2

Documentation History

All Editions and Updates of t his manu al and th eir creati on da te are list ed belo w. The first Edition of the m anual is Ed ition 1. The Edition number increments by 1 whenever the manual is revised. Updates, which are issued between Editions, contain replacement pages to correct or add additional information to the current Edition of the manual. Whenever a new Edition is created, it will contain all of the Update information for the previous E dition. Each new Edition or Update also inc ludes a revised c opy of this do cumentation history page.

Edition 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .October 1997

Edition 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . April 1998

Safety Symbols

Instruction manual symbol affixed to

Instruction manual symbol affixed to product. Indicates that the user must refer to

product. Indicates that the user must refer to the manual for specific WARNING or

the manual for specific WARNING or CAUTION information to av oid personal

CAUTION information to av oid personal injury or damage to the product.

injury or damage to the product.

Indicates the field wiring te rminal that must be connected to earth ground be fore

operating the equipmentÅprotects against electrical shock in case of fault.

WARNING

Alternating current (AC)

Direct current (DC).

Indicates hazardous voltages.

Calls attention to a procedure, practice, or condition that could cause bodily injury or death.

Frame or chassis ground terminal —typically connects to the equipment' s metal frame.

CAUTION

Calls attention to a procedure, practice, or condition that coul d possibly cause damage to equipment or perman ent loss of data.

WARNINGS

The following general safety precautions must be observed during all phases of operatio n, service, and repair of this product. Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design, manufacture, and intended use of the product. Hewlett-Packard Com pany assumes no liability for the customer's failure to comply with these requirements.

Ground the equipment: For Safety Class 1 equipment (equipment having a protective earth terminal), an uninterruptible safety earth ground must be provided from the mains power source to the product input wiring terminals or supplied power cable.

DO NOT operate the product in an explosive atmosphere or in the presence of flammable gases or fumes. For continued protection against fire, replace the line fuse(s) only with fuse(s) of the same voltage and current rating and type. DO NOT

use repaired fuses or short-circuited fuse holders. Keep away from live circuits: Operating personnel must not remove equipment covers or shields. Procedures involving the removal of

covers or shields are for use by service-trained personnel only. Under certain conditions, dangerous voltages may exist even with the equipment sw itche d off. To av oid danger ous ele ctric al sh ock, DO NOT perfor m pro cedure s inv olving cover or shi eld remova l unles s you are qualified to do so.

DO NOT operate damaged equipmen t: Whenever it is possible that the safety protection features built into this product have been impaired, either through physical damage, excessive mois ture, or any other reason, REMOVE POWER and do not use the product until safe operation can be verified by service-trained personnel. If necessary, return the product to a Hewlett-Packard Sales and Service Office for service and repair to ensure that safety features are maintained.

DO NOT service or adjust alone: Do not attempt internal service or adjustment unless another person, capable of rendering first aid and resuscitation, is present.

DO NOT substitute parts or modify equipment: Becaus e of th e dang er of introd ucing addition al haz ards, do not i nstall subst itute pa rts or perform any unauthorized modification to the product. Return the product to a Hewlett-Packard Sales and Service Office for service and repair to ensure that safety features are maintained.

Declaration of Conformity

according to ISO/IEC Guide 22 and EN 45014

Manufacturer’s Name: Hewlett-Packard Company

Loveland Manufacturing Center

Manufacturer’s Address: 815 14th street S.W.

Loveland, Colorado 80537

declares, that the product:

Product Name: 2-Channel and 4-Channel Digitizer Model Number: HP E1563A and HP E1564A Product Options: All

conforms to the following Product Specifications: Safety: IEC 61010-1 (1990) Incl. Amend 2 (1996)/EN61010-1 (1993)

CSA C22.2 #1010.1 (1992) UL 3111-1 (1994)

EMC: CISPR 11:1990/EN55011 (1991): Group 1, Class A

EN61000-3-2:1995 Class A EN61000-3-3:1995 EN50082-1:1992

IEC 1000-4-2:1995 4kV CD, 8kV AD IEC 1000-4-3:1995 3 V/m IEC 1000-4-4:1995 1kV Power Line, 0.5kV Signal Lines ENV50141:1993/prEN50082-1 (1995): 3 Vrms EN61000-4-5:1995 1kV CM, 0.5kV DM EN61000-4-8: 1993/prEN50082-1 (1995): 3 A/m EN61000-4-11:1994/prEN50082-1 (1995): 30%,10ms 60%,100ms

Supplementary Information: The product herewith complies with the requirements of the Low Voltage Directive 73/23/EEC and the EMC Directive 89/336/EEC (inclusive 93/68/EEC) and carries the "CE" mark accordingly.

Tested in a typical configuration in an HP C-Size VXI mainframe.

November 15, 1997

European contact: Your local Hewlett-Packard Sales and Service Office or Hewlett-Packard GmbH, Depart-

ment HQ-TRE, Herrenberger Straße 130, D-71034 Böblingen, Germany (FAX +49-7031-14-3143)

Jim White, QA Manager

WARNINGS

The HP E1563A and E156 4A Digitizers are capable of measuring voltages up to 256V maximum. Voltage levels above the levels specified for accessible connectors or cable ends could cause bodily injury or death to an operator. Special precautions must be adhered to (discussed below) when applying voltages in excess of 60 Vdc, 30 Vac rms or 42.4 Vac peak for a cont inuous, complex waveform.

Module connectors and test sign al cables connected to them cannot be operator accessibl e. Cables and connectors are considered inaccessible if a tool (e.g., screwdriver, wrench, socket, etc.) or a key (equipment in a locked cabinet) is required to gain access to them. Additionally, the operator cannot have access to a conductive surface connected to any cable conductor (High, Low or Guard).

applying) to assure the operator will NOT come into contact with any energized conductor even if one of the protective means fails to work as intended. For example, the inner side of a case, cabinet, door, cover or panel can be covered with an insulating material as well

as routing the test cables to the module’s front panel connectors through non-conductive, flexible conduit such as that used in electrical power distribution.

Please fold and ta pe for mailing

Reader Comment Sheet

HP E1563A 2-Channel and HP E1564A 4-Channel Digitizer User’s and SCPI Programming Manual

Edition 2

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Please pencil-in one circle for each statement below: Disagree Agree

• The documentation is well organized. OOOOO

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Note Your Digitizer may have experienced temperature extremes during ship-

Using This Chapter

Chapter 1

Digitizer Module Set-up

ment that can affect it’s calibration. It is recommened you perform a zero offset calibration upon receipt using the command for each channel to realize the accuracy specifications in Appendix A. See Appendix E for the zero adjustment procedure.

This chapter pro vid es one page of general modul e information followed by the tasks you must perform to set up your module and verify your installation was successful. Chapter contents are:

CAL:ZERO<

•Adding DRAM (PC Memory SIMM) to the Module

•Setting the Module Address Switch

•Interrupt Line

•Input Terminals and Front Panel Indicators

•3-Wire and 2-Wi re Input Cabling Considerations

•Initial Operation

channel

>:ALL?

General Information The HP E1563A (2-channel) and HP E1564A (4-channel) are 800

kSample/second (14-bit resolution) digitizers capable of handling both continuous and transient voltages up to 256V. They are ideal for measurements in electomechanical design characterization, particularily in environments with high levels of electrical noise. They are also ideal for characterizing el ectronic and mechanic al trans ient wavef orms. You cannot upgrade an E1563A 2-Channel to an E1564A 4-Channel Digitizer.

Both digitizers are designed to use PC SIMM memory. Memory sizes that are supported are 4, 8, 16, 32, 64 and 128 Mbytes. The large memory can easily capture tr ansients or act a s FIFO to allo w continuou s digiti zing while unloading data with block mode transfers.

All channels sample simultaneously. The sample can be from an internal clock derived from the internal time base or it can come from an external source. Triggering ca n be set up for several sourc es with progra mmable pre and post trigger reading counts. External time base, trigger and sample

inputs are provided on the front panel “D” subminiature connector. Both the E1563A and E1564A digi tizers are re gister-based ins truments that

can be programmed at the regis ter le vel (regi ster programmin g infor mation is covered in Appendix C) or at a higher level using SCPI or Plug&Play drivers.

Digitizer Module Set-up 9

Continuous voltages in a test set-up where the user has access to module connectors and test signal cable ends are restricted to:

•60 Vdc

•30 Vac-rms

•42.4 Vac peak of a continuous, complex waveform

Continuous voltages in tes t set-ups where the module connector s and the test signal cables connected to them are made non-accessible are:

•256 Vdc, 240 Vdc floating

•256 Vac peak

Transient voltages:

•Transient voltages are permitted providing the maximum amount of

charge transferred into a human body that contacts the voltage under normal conditions, does not exceed 45 uCoulombs (45 uA-s).

Overload voltages (opens channel input relay):

Range V oltage Input Condition Vmax

62 mV to 4V High or Low to Guard >20V

4-channel and 2-channel

Module Differences

16V to 256V Low to Guard >40V

•The E1564A 4-Channel Digitizer has four selectable input filters per

channel (1.5 kHz, 6 kHz, 25 kHz and 100 kHz) that can be enabled.

•The E1563A 2-Channel Digitizer has a fixed 25 kHz input filter per

channel th at can be enabled.

•The E1564A 4-Channel Digitizer has a calibration bus output

(High, Low and Guard) and a programmable short.

•The E1563A 2-Channel Digitizer does not have a calibration bus

output however, a programmable short is provided for each channel. An external calibration source must be provided for calibration.

The HP E1563A and E1564A Digitizers are c apable of measuring voltages up to 256V maximum. Voltage levels above the levels specified for accessible connectors or cable ends could cause bodily injury or death to an oper ato r. Special precautions must be adhered to (discussed below) when applying voltages in excess of 60 Vdc, 30 Vac rms or 42.4 Vac peak for a continuous, complex waveform.

Module connectors, and test signal cables connected to them, must be made NON-accessible to an oper ator who has not bee n

told to access them: It is a supervisor’s res ponsibility t o advise an operator that dangerous voltages exist when the operator is instructed to access connectors and cables carrying these

10 Digitizer Module Set-up

WARNING voltages. Making cables and connectors that carry hazardous

voltages inaccessible is a protective measure keeping an operator from inadvertent or unknowing contact with these harmful voltages. Cables and connectors are consi dered inaccessible if a tool (e.g., screwdri ver, wrench, socket, etc.) or a key (equipment in a locked cabinet) is required to gain access to them. Additionally, the operator cannot have access to a conductive surface connected to any cable conductor (High, Low or Guard).

Assure the equipment under test has adequate insulation between the cable connections and any operator-accessible parts (doors, covers, panels, shields, cases, cabinets, etc.): Verify there are multiple and sufficient protective means (rated for the voltages you are applying) t o assure the operator will NOT come into contact with any energized conductor even if one of the protective means fails to work as intended. For example, the inner side of a case, cabinet, door, cover or panel can be covered with an insulating material as well as routing

the test cables to the module’s front panel connectors through non-conductive, flexible conduit such as that used in electrical power distribution.

WARNING Tighten the faceplate mounting screws after installing the

module in the mainframe to prevent electric shock in the case of equipment or field wiring failure.

Caution To prevent equipment damage, do not connect this equipment

to mains or to any signal directly derived from mains. Short-term temporary overvoltages must be limited to 500V or less.

Caution To prevent equipment damage in the case of an overvoltage

condition, do not connect this equipment to any vol t age source which can deliver greater than 2A at 500V in t he case of a fa ult. If such a fault condition is possible, insert a 2A fuse in the input line.

CLEANING THE FRONT PANEL AND TOP/BOTTOM SHIELDS: Clean the outside surfaces of this module with a cloth slightly dampened with water . Do not attempt t o clean the interior of th is module.

Digitizer Module Set-up 11

Adding RAM to the

Module

Note Although most commercially available PC SIMM RAM will work with

You can increase the size of RAM on your Digitize r mod ule by purchasing PC SIMM memory and installing it on the module after you remove the standard 4 Mbyte SIMM shipped with your digiti zer. Bot h FPM (Fast Page Mode) and EDO (Extended Data Out) are supported.

your Digitizer, there are some that are physically too large and will make contact with the top shield when installed. A standard 72 SIMM specifies the length (L) or keying but does not spec if y the dept h (D). Cert ai n dept hs are too large and not compatible. The E1563/E1564 has about 17.6 mm of space from the bottom of the SIMM RAM inserted in the socket to the top module shield (see diagram below). You must verify that the SIMM RAM you purchase for replacement on the module has a depth (D) that will clear the top module shield. You can use the 4 Mbyte SIMM RAM you remove as a guide, as well as the dimensions in the diagram be low, when purchasing your upgrade RAM .

RAM Install Procedure 1. Disconnect any field wiring from the module and remove power

from the mainframe before proceeding.

2. Remove the module from the mainframe and remove the top shield from the module.

3. Remove the 4 Mbyte SIMM from t he PC boar d by f irst spr eadin g the tabs at the ends of the SIMM connector. Store this SIMM in an anti-static bag and save this part.

Note It is important that you retain the 4 Mbyte SIMM you remove from the

Digitizer. If you return your Digitizer to Hewlett-Packard for repair or exchange, you must return it in the same configuration as it was shipped to you. You must remove your large memory SIMM and replace it with the standard 4 Mbyte SIMM shipped with the product.

4. Add your replacement SIMM to the module’s RAM socket.

5. Reinstall the module’s top shield.

6. Note the new memory configuration by checking the appropriate

12 Digitizer Module Set-up

box on the module’s top shield.

7. Set both the “CALIBRATION CONSTANTS” switch and the “FLASH” switch to the “Write Enable” position.

8. Install the module in your mainframe and apply power.

9. Set the new RAM memory size by sending the command:

DIAGnostic:MEMory:SIZE <

10. Query the memory size to verify the setting by sending:

DIAGnostic:MEMory:SIZE?

11. Remove mainframe power, remove the module and set the “CALIBRATION CONSTANTS” and “FLASH” switches back to the “Read Only” position.

12. Reinstall your module in your mainframe.

size

WARNING Tighten the faceplate mounting screws to prevent electric

shock in the case of equipment or field wiring failure.

Digitizer Module Set-up 13

Setting the Module

Address Switch

Note When using an HP E1405A/B or E1406A as th e VXIb us r es ourc e man ager

The logical address switc h factory setting i s 40. Valid address are fro m 1 to 254 for static configuration (the address you set on the switch) and address 255 for dynamic configuration. The HP E1563A and HP E1564A do not support dynamic configuration of the address.

If you install more than one digitizer, each module must have a different logical address. If you use a VXIbu s command module, the l ogical addr ess must be a multiple of eight (e.g., 32, 40, 48, 56, etc.). Each instrument must have a unique secondary address which is the logical address divided by eight. The Digitizer is shipped from the factory with logical address 40.

with SCPI commands, the digitizer’s address switch value must be a multiple of 8.

Interrupt Line The HP E1563A and E1564A Digitizers are VXIbus interrupter s. You can

14 Digitizer Module Set-up

specify which interrupt line (1 through 7) the interrupt is transmitted. The interrupt line is specified using the DIAGnost ic:INTerrupt:LINE comman d. You can query the active interrupt line using the DIAGnostic:INTerrupt :LINE? command. The default is no interrupt line enabled at power-up. You specify “0” if y ou do not wa nt an inte rrupt . Res etting the module does change the interrupt line setting and you must reset your interrupt setting.

Installing the Digitizer in a Mainframe

The HP E1563A or E1564A can be installed in any slot (except slot 0) in a C-size VXIbus mainframe. Refer to following diagram for the procedure to install the Digitizer in a mainframe.

1. Set the extraction levers out.

2. Slide the HP E1563/E1564 into any

slot (except slot 0) until the backplane connectors touch.

Extraction Levers

4. Tighten the top and bottom screws to secure the digitizer

module to the mainframe.

NOTE: The extraction levers will not seat the backplane connectors on older VXIbus mainframes. You must manually seat the connectors by pushing in the module until

the module’s front panel is flush with the front of the mainframe. The extraction levers may be used t o guide or remove the digitizer.

Reverse the procedure to remove the digitizer from the mainframe.

3. Seat the digitizer into the mainframe by pushing in the

extraction levers.

Digitizer Module Set-up 15

HP E1563A Front Panel Indicators

The “Failed” LED illuminates momentarily dur ing the digitizer’s power-on boot.

The “Access” LED illuminates only when the backplane is communicating with the digitizer.

The “Errors” LED illuminates only when an error is present in the digitizer’s driver error queue. The error can result from improperly executing a command or the digitizer being unable to pass self -test or calibration. Use the SYST:ERR? comma nd repeatedly to read and clear the error queue (or use *CLS to clear the error queue without reading errors). A response of +0,”No error” indicates the error queue is empty. See Appendix B, HP E15 63A and E1564A Digi tizer Error Messages, for a list of all errors.

The “Sample” LED illuminates while t he digitizer samples the input for a measurement. The “Sample” indicator typically will blink for slow sample rates and is on steady-state for high sample rates .

HP E1563A Input Terminals

The HP E1563A Digitizer’s front panel contains two Switchcraft® EN3™ Mini Weathertight Connectors (female) . Mating Switc hcraft® Cord Connectors (male) are supplied with the module and the user must provide the cable and ass emble the connector to the cable end. Shielded twisted pair cab le is recommended with some reco mmendations shown in the following table that have an outside dimension compatible with the cord connector.

Wire gauge Belden® cable P/N Alpha® cable P/N

20 AWG (7x28) 8762 none 22 AWG (7x30) 9462 5481C 24 AWG (7x32) 8641 5491C

HP E1563A D-subminiature Connector Pins

The front panel contains a 9-pin D-subminiature connector with the following pin-out and associat ed SCPI commands (do not make any connections to the top two pins):

SAMPle:SOURce EXT

TRIGger:SOURce EXT

ROSCillator:SOURce EXT

16 Digitizer Module Set-up

HP E1564A Front Panel Indicators

The “Failed” LED illuminates momentarily dur ing the digitizer’s power-on boot.

The “Access” LED illuminates only when the backplane is communicating with the digitizer.

HP E1564A Input Terminals

The HP E1564A Digitizer’s front panel contains four Switchcraft® EN3™ Mini Weathertight Connectors (female) . Mating Switc hcraft® Cord Connectors (male) are supplied with the module and the user must provide the cable and ass emble the connector to the cable end. Shielded twisted pair cable is recommended with some recommendations shown in the following table that have an outside dimension compatible with the cord connector.

Wire gauge Belden® cable P/N Alpha® cable P/N

20 AWG (7x28) 8762 none 22 AWG (7x30) 9462 5481C 24 AWG (7x32) 8641 5491C

HP E1564A D-subminiature Connector Pins

The front panel contains a 9-pin D-subminiature connector with the following pin-out and associated SCPI commands:

CAL:SOURce INT

SAMPle:SOURce EXT

CAL:SOURce INT

TRIGger:SOURce EXT

ROSCillator:SOURce EXT

Digitizer Module Set-up 17

3-Wire and 2-Wire

Input Cabling

Considerations

The HP E1563A and E1564A Digitizers provide a three-terminal input system (High, Low and Gu ard). An unavoidab le and u ndesirable current i s injected from chassi s grou nd to t he Guard term inal. Dependen t on whet her you measure on a low-voltage range or a high-voltage range, the way you connect the Guard terminal may or may not i ntr oduce a measurement error due to this current. This section describes some considerations you must take to use the Guard terminal properly to minimize measurement error.

Digitizer Input Model The input model for the digitizer is shown below. Maximum voltage

between Low and Guard is 5V.

Note Maximum voltage between Low and Guard is 5V. Exceeding this

limitation will not damage your digitizer but will generate invalid data for any measurement taken.

Three-Wire Connection This section shows two examples of connecting the i nput using a three-wi re

connection. Both example s can be const ructed using shi elded twis ted pair. The first example shows making connections for a bridge measurement where the L-to-G voltage is ≤ 5V and where the L-to-G voltage ex ceeds 5V.

A “Wagner ground” is used to satisfy the L-to-G restriction of ≤ 5V and to make a Guard connec tion point that min imizes measuremen t error due to th e digitizer’s injected current. A capacitor is added to the Wagner ground to provide a signal path to ground to minimize common mode voltages. The second example shows measuri ng the voltage across a smal l current sensing resistor where the input to the digitizer is switched through a multiplexer switch module.

3-Wire Cable Connection Example 1

18 Digitizer Module Set-up

3-Wire Cable Connection Example 2

Two-Wire Connection When Low and Guard are simply connected together at the di gitizer ’s input

on a low-voltage range (4V and below), the injected current is directed to flow through the source impedance (in a floating source) and the resultant voltage drop will introduce a me asurement error . The result ant voltage d rop through the source impedance can be a significant error on low-voltage ranges where the volt ag e of inter est is small . It is n ot as s ignif icant a n err or on high-voltage ranges simply because the error introduced is not a significant part of a larger voltage; the percent of error is less signifi cant.

Measurement error can increase significantly when you connect Low to Guard at the digitizer’s input AND use switches to switch input signals to the digitizer. Some switches hav e input prote ction resist ors (usuall y 100Ω) in series with the switch. The digitizer’s injected current now generates a voltage drop across this resistor in addition to the voltage drop generated across the source impedan ce. Even with a grounded source, an error volt age is generated across the switches current limiting resistor .

2-Wire Cable Connection Example

Digitizer Module Set-up 19

Cable Connector Assembly Instructions

Step 1. Strip cable as shown and feed the end of the cable throu gh the boot, cabl e clamp housing , and coupling

ring in the order and position shown. NOTE: The coupling ring can also be inserted onto the cable connector from the front.

Step 2. Orient the HI, LO and Guard conductors with the corresponding pins.

Step 3. Solder conductors to pins. CAUTION - Excessive heat on the connector terminals can cause

damage to the connector.

20 Digitizer Module Set-up

Step 4. Assemble the connector.

A. Align coupling ring’s tabs with cable connector’s side notches and push the coupling ring onto the cable

connector.

B. Push the cable clamp housing forward until it locks into the connector body and snap the two clamps into

their compartments to secure the cable.

C. Push the boot all the way forward to seat tightly onto the cable clamp housing.

Cable

Connector

oupling

Ring

Cable Clamp

Housing

Boot

To mate the cable connector to the instrument’s front panel connector...

1. Hold the cable connector by the rubber boot a nd align the no tched key slot with the key on t he left si de of the

instrument’s front pa nel conne ctor. Inse rt the c able con nector just en ough to enc ounter inserti on resi stance and stay in plac e.

2. Grasp the coupling ring and slowl y rotate it clockwise, while you gently push the connector to ward the panel mount, until the notches on the coupling ring drop into the front panel connector detents.

3. Continue rotating unti l y ou feel the coupling ring ride over the locking “bump” which secures t he c onnector to the instrument’s front panel connector.

Digitizer Module Set-up 21

Initial Operation To program the Digitizer using SCPI, you must select t he i nterface address

and SCPI commands to be used. General information about using SCPI commands is presented at the beginning of Chapter 3. See the HP 75000 Series C Installation and Getting Started Guide for interface addressing.

Note This discussion applies only to SCPI (Standard Commands for

Programmable Instruments) programming. The program is written using VISA (Virtual Instrument S oftware Architecture) function calls. VISA allows you to execute on VXI Plug&Play s ystem fr ameworks t hat ha ve the

VISA I/O laye r installed (visa.h “in clude” file).

Programming the

Digitizer

Example: Query the Digitizer for its ID and for system errors.

Programming the digitizer using Standard Commands for Programmable Instruments (SCPI) requir es tha t you selec t the contr oller lang uage (e .g., C, C++, Basic, Visual Basi c, etc.), i nterface a ddress and SCPI commands to be used. See the “C-Size Installation and Getting Started Guide” (or equivalent) for interfacing, addressing and controller information.

The following C program verifies communication between the controller, mainframe and digitizer. It resets the module (*RST), queries the identity of the module (*IDN?) and queries the module for system errors.

#include <stdio.h> #include <visa.h>

/*** FUNCTION PROTOTYPE ***/ void err_handler (ViSession vi, ViStatus x);

void main(void) {

char buf[512] = {0}; #if defined(_BORLANDC_) && !defined(_WIN32_)

_InitEasyWin(); #endif

22 Digitizer Module Set-up

ViStatus err; ViSession defaultRM; ViSession digitizer;

/* Open resource manager and digitizer sessions */

viOpenDefaultRM (&defaultRM);

viOpen(defaultRM, “

/* Set the timeout value to 10 seconds. */

viSetAttribute (digitizer, VI_ATTR_TMO_VALUE, 10000);

/* Reset the module. */

err = viPrintf(digitizer, “*RST\n”);