HP (Hewlett-Packard) 53A, E1351A User Manual

Download

Contents

HP E1351A/53A FET Multiplexer User’s Manual

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

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

Safety Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Reader Comment Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Chapter 1.Getting Star te d wit h the HP E1351 A/53 A . . . . . . . . . . . . . . . . . . . . . 11

Using This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

FET Multiplexer Modul e Descr ip ti on . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Multimeter Connection Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Analog Bus C onnector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Tree Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Direct Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Switchbox and Scanning Voltmeter Configurat i ons . . . . . . . . . . . . . . . . . . . 14

Switchbox . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Scannin g Voltmeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Digital Bus and Triggering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Programming Language . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Initial Opera ti on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Chapter 2.Configuring the HP E13 51A/ 53A FET Multi ple xer Modules . . . . . . . . . . 17

Using This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Warnings and Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Multiplexer Ca rd Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Setting the Address Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Selecting the Interrupt Line Number . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Setting the Card ID Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Connecting User Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Adding Signal Conditioning Compon ents/Current Shunts . . . . . . . . . . . . . . . . 23

Connecting Field Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Wiring Guideli nes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Wiring a Terminal Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Connecting Multimeters and Signal Gen er ators . . . . . . . . . . . . . . . . . . . . . 26

Analog Bus and Digital Bus Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Chapter 3.Using the HP E13 51A/ 53A FET Mu ltiple xe r Modules . . . . . . . . . . . . . . 29

Using This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Selecting Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Multiplexer Comm a nd s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Connecting Switchbox Channels to Direct Terminals . . . . . . . . . . . . . . . . . . 32

Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Connecting Switchbox Channels to Tree Term i nals for Making Mea sure m ents . . . . . 34

Scannin g a Ra nge of Switch box Chann el s . . . . . . . . . . . . . . . . . . . . . . . . 36

Downloading a Scan List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Scanning a Switchbox without a Downloaded Scan Li st . . . . . . . . . . . . . . . . . 40

Scanning a Switchbox with a D own l oaded Sc an List . . . . . . . . . . . . . . . . . . . 41

Scanning Voltmeter Configuration w it h HP E1326B . . . . . . . . . . . . . . . . . . . 42

HP E1351A/53A FET Multiplex er User’s Manual Contents 1

Measuring Temperatu re Using Thermoc ouples

(HP E1353A Modul e on ly) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Setup for Measuring Ther m o couple Temperature using an Ex terna l Mu ltim eter . . 43

Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Chapter 4.Understandi ng the HP E1351A/ 53A FET M ulti ple xer Modules . . . . . . . . . 45

Using This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Commands for Scanning Switchbox Channels . . . . . . . . . . . . . . . . . . . . . . 45

Using S canning Trigger Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Scannin g w it h External I nstrumen ts . . . . . . . . . . . . . . . . . . . . . . . . . 45

Using the Scan Complete Bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Chapter 5.HP E1351A/53A 16-Cha nnel FET Multiple xer Command Refere nc e . . . . . . 53

Using This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Command Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Common Command Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

SCPI Command F ormat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Linking Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

SCPI Command Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

ABORt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

ARM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

:COUNt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

:COUNt? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

DISPlay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

:MONitor:C ARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

:MONitor[:STATe] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

INITiate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

:CONTinuous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

:CONTinuous? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

[:IMMediate] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

OUTPut . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

[:STATe] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

[:STATe] ? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

[ROUTe:] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

CLOSe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

CLOSe? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

OPEN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

OPEN? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

SCAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

SCAN:MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

SCAN:MODE? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

SCAN:PORT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

SCAN:PORT? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

SETTling[:TIME] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

SETTling[:TIME]? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

STATus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

:OPERati on:E N ABle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

:OPERati on[:E VENt]? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

SYSTem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

:CDEScript i on? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

2 HP E1351A/53A FET Multiplexer User’s Manual Contents

:CPON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

:CTYPe? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

:ERRor? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

TRIGger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

[:IMMediate] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

:SOURce . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

:SOURce? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

IEEE 488.2 Common Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Command Quick Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Appendix A.HP E1351A/53A FET Multiplexe r Spec ificat i ons . . . . . . . . . . . . . . . . 79

Appendix B.HP E1351A/53A Re gi ster-Based Progra mming . . . . . . . . . . . . . . . . . 81

About This Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

The Base Addres s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

A16 Address Space Outside the Comma nd Module or Ma infra me . . . . . . . . . 83

A16 Address Space Inside the Command Module or Mainframe . . . . . . . . . . 83

WRITE Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

READ Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Manufacturer ID Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Device Type Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Status/C ont rol Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

Scan Cont rol Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Scan Channel Delay Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Scan Cha nnel Configuration Register . . . . . . . . . . . . . . . . . . . . . . . . 89

Direct Channel Configuration Register . . . . . . . . . . . . . . . . . . . . . . . . 89

Direct Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Executing Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Multimeter Command and Parameter Opcodes . . . . . . . . . . . . . . . . . . . 96

Multimeter Regist er - Based Program min g Error Codes . . . . . . . . . . . . . . . 98

Appendix C.HP E1351A/53A FET Multiplexe r Error M essage s . . . . . . . . . . . . . . . 99

HP E1351A/53A FET Multiplex er User’s Manual Contents 3

Notes

4 HP E1351A/53A FET Multiplexer User’s Manual Contents

Certification

Hewlett-P ackar d Company c ertif ies that this produ ct m et its published sp ec ifica tion s at the time of shipment from the fact ory. H ewlettPackard further certifies that its calibration measurements are traceable to the United Stat es Nation al Instit ute of Stand ard s and Technology (for m erl y Nat ional Bur ea u of Standar ds ), to the ex tent allo wed by that orga ni zati on’ s cal ib rat ion f ac ili t y, and t o th e calibrat i o n facilities of other International Standards Organization m emb er s.

Warranty

This Hewlet t-Pa ck ar d product is warr ante d agai nst de fect s in mate rials and w orkmansh ip for a period of three yea rs from date of shipment. Duration and conditi ons of warranty for this product may be superse ded when the product is integrate d in to ( becomes a part of) other HP products. During the warr anty period, Hewlett-Packar d Company will, at its option, either rep air or re pl ace products whi ch prove to be defective.

For warrant y se r vice or repair, this product must be returned to a service faci l it y designated by Hewlett-Packar d (HP). Buyer sha l l prepay shippin g charges to HP and HP sh al l p ay shipping charges t o re tu rn t he product to Buyer. However, Buyer shall pay all shipping charges, dutie s, an d taxe s for products ret urned to HP from an other cou ntry.

HP warrants tha t its softwar e and fir mwar e designa t ed b y HP for use with a product will exe cu te its pr ogrammin g instru cti ons wh en properly installe d on that product . HP does not warrant that t he operat ion of the product, or software, or firmware wi ll be uninterrupted or er ro r f r ee.

Limitation Of Warranty

The foreg oin g warranty shall not appl y t o defects resul ting from i mproper or inadequate mainte nance by Buyer, Buyer-supplied products or interfacing, unauthori ze d m odificati on or misus e, opera tion outside of the environmental specificat ions for the product, or improper site prep arat i on or maint ena nce.

The design an d imp le mentation of any circuit on this product is the sole responsibility of th e Buyer. HP does not warra nt th e Buyer’s circuitr y or malfunction s of HP products that result from the Bu yer’s circuit r y. In addition, HP does not warrant an y damage tha t occurs as a result o f the Buyer’s circuit or an y defects that re sult from Buyer-supplied product s.

NO OTHER WARRANTY IS EXPRESSED OR IMPLIED. HP SPECIFICALLY DISCLAIMS THE IMPLIED WARR ANT IES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

Exclusive Remedie s

THE REMED IES PROVIDED HEREIN ARE BUYER’S SOLE AND EXCLUSIVE REMEDIES. HP SHALL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WHETHER B ASED ON CONTRACT, TORT, OR ANY OTHER LEGAL THEORY.

Notice

The information contained in this document is subject to change without notice. HEWLETT-PACKARD (HP) MAKES NO WARRANTY OF ANY KIND W ITH REGARD TO THIS MATERIAL, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. HP shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance or use of this material. This document c ontai ns proprietary informati on which is protected by copyri ght. All rights ar e reserved. N o par t o f thi s document may be photocopied, reproduced, or tran slate d to anothe r langua ge wit h out the prior written c onsent of Hewlett -P ackar d Company. HP assumes no responsibility for the use or reliability of its software on equipment that is not furnished by HP.

Restricted Rights Legen d

Use, dupli ca tion or discl osu re by the U. S. Go vernme nt is subje ct to rest rict i ons as set fort h in subparagraph (c)(1) (ii ) of the Rights in Technical Data and C omput er Softwa re claus e in DF ARS 252. 227-701 3.

Hewlett-Packar d Company 3000 Hanover Street Palo Alto, Cali f ornia 943 04 U.S. A.

Rights for non-DOD U.S. Government Departments and Agen ci es are as set f orth in F AR 52.227 -19 (c) (1,2).

HP E1351A, E1353A 16-Chann el FET Mul tip lexe r Modul e s User’s Man ual

Edition 4

HP E1351A, E1353A 16-Channel FET Multiplexer Modules User’s Manual 5

Documentatio n History

All Editions and Updates of this manual and their creation date are listed below. The first Edition of the manual is Edition 1. The Edition number increment s by 1 whenever the manua l is revised . Updates , which are issued betw een Edi ti ons, c ontain repla ce ment pa ges to correct or add additional information to the current Edi tion of the manua l. Whene ver a new Edition is creat ed, it will c ontain all of the Update information for the pre vious Edit ion. Each new Ed ition or Update also include s a revised c op y of this documentation hi story page.

Edition 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . August 1990

Edition 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . September 1993

Edition 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . August 1994

Edition 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . July 1995

Safety Symbols

Instruction manual symbol affixed to product. Indicat es that the user must re fe r t o the manual for specific WARNING or CAUTION information to avoid personal injury or damage to the product.

Indicates the field wiring terminal that must be connected to earth ground before operating the equipment—protects against electrical shock in case of fault.

Frame or chassis ground termi nal — t ypi-

cally connects to the equipment’s metal frame.

WARNING

CAUTION

Alternating current (AC).

Direct curren t (DC).

Indicate s ha za rdous voltages.

Calls at te nt i on t o a pr ocedure, practi ce, or condition that could cause bodily injury or death.

Calls at te nt i on t o a pr ocedure, practi ce, or condition that could possibly cause damage to equipme nt or perma nen t los s of data.

WARNINGS

The following ge ner al safet y prec aut ions mu s t be observed du ri ng al l phas es of oper ation, service, and re pai r of this product. Failure to comply with these prec aut ions or with specific war nings elsewhe re in this manual violates safety stand ard s of design , manufacture, and intended use of the product. H ewl et t-Pac kard Company assumes n o liabilit y f or the cus t o mer’s fai lu re to comply with these requirements.

Ground the equipment: For Safety Cl as s 1 equipmen t (equ ipment ha vin g a protective ea rth ter mi nal) , an unint erru ptib le sa fety earth

ground must be provide d from the ma in s power sour ce to the produ ct input wi rin g termi nals or suppli ed power cable .

DO NOT operate the produc t in an explosive at mospher e or in the presen ce of flammable gases or fumes.

For continued protect ion a gainst fire, repl ace the li ne fuse(s) only with fuse(s) of the same voltage and current rating and type . DO NOT use repaired fuses or short-circui ted fuse holders.

Keep away from live circuits: Operatin g 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, danger ous voltages may exist even with the equipment switched off. To avoid dangerous ele ctrical shock , DO NOT perf orm procedures involving cover or shield removal unless you are qualified to do so.

DO NOT operate damaged equipment: Whenever it is possible that the safety protection feat ur es bui l t i nt o t hi s pr oduct have been im paired, either t hr ough physical dama ge, exces si ve moisture, or any other re as on, 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 -Packar d Sa les and Se r vice Office for service and repair to ensure that safety features are maintaine d.

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

DO NOT substitute par ts or modify equipment: Because of the danger of introducing additional hazar ds, do not install substitute parts or perform any unauth orized modifica tion to the product. Ret urn the produ ct to a Hewlett -Packar d Sa les and Ser vice O ffice for service and repair to ensure that sa fe ty features are ma i nt ai ned.

6 HP E1351A, E1353A 16-Channel FET Multiplexer Modules User’s Manual

Declaration of Conformity

according to ISO/IEC Guide 22 and EN 45014

Manufacturer’s Name: Hewlett-Pa ckar d C ompany

Loveland Manufacturing Center

Manufact ure r’s Addre s s: 815 14th Street S.W.

Loveland, Colorado 80537

declares, that the product:

Product Name: 16-Channel FET Mult iplexer M odule s

Model Number : E1351A, E1353A

Produc t Opt ion s: All

conforms to the following Pr od uct Spe cifi cati ons :

Safety: IEC 1010-1 (1990) Incl . Amend 1 (1992) /E N610 10-1 (1993)

CSA C22.2 #1010.1 (1 992) UL 1244

EMC: CISPR 11:1990/EN55011 (1991): Group1 Class A

IEC 801-2:1991/ E N5008 2-1 (1 992) : 4kVCD, 8k VA D IEC 801-3:1984/ E N5008 2-1 (1 992) : 3 V/m IEC 801-4:1988/ E N5008 2-1 (1 992) : 1kV P ower Lin e .

Supplementary Information: The product herewi th c omplies w it h th e requirements of the Low Voltage Directive 73/23/EEC and the EMC Directive 89/336/ EEC and carri es the CE-mark ing acc ordingly.

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

July 20, 1995 Jim White , QA Manager

European conta ct: Your loca l He wlett-Pa cka rd Sales a nd Servi ce O ffic e or Hewlett- Packa rd GmbH, Departm ent HQ-TRE, Herr enberger Str aß e 130, D-71034 Böbl in gen, Germany (FAX + 49-7031-14-3143).

HP E1351A, E1353A 16-Channel FET Multiplexer Modules User’s Manual 7

Notes

8 HP E1351A, E1353A 16-Channel FET Multiplexer Modules User’s Manual

Please fold and tape for mailing

Reader Comment Sheet

HP E1351A/53A 16-Channel FET Multiplexer Module User’s Manual

Editio n 4

You can help us improve our manual s b y sharing your commen ts and sug gesti ons. In apprec iat i on of your time, we will enter yo u in a quarterly drawing for a Hewle tt -Pac kar d Palmt op Per s onal C omputer (U.S. government employees

cannot participate in the drawing).

Your Name

C ompany Nam e

Job Title

Address

City, State/Province

Country

Zip/Postal Code

Telephone Number with Area Code

Please list the syste m contr ol ler , oper ati ng syste m, pr ogr a m ming la ng uage, and pl ug-in modules you are using.

fold here

BUSINESS REPLY MAIL

FIRST CLASS PERMIT NO. 37 LOVELAND,CO

HEWLETT-PACKARD COMPANY

cut along this line

Measurement Systems Division

Learning Products Department P.O. Box 301 Loveland, CO 80539-9984

NO POSTAGE

NECESSARY

IF MAILED

IN THE

UNITED STATES

fold here

Please penci l-in one circl e for each statement below: Disagree Agree

• The documentation is well organized. OOOOO

• I nstructions are easy to understand. OOOOO

• The documentation is clearly written. OOOOO

• Examples are clear and useful. OOOOO

• Illustrations are clear and helpful. OOOOO

• The documentation meets my overall expectations. OOOOO

Please write any c omments or suggestions be low--be specific.

10 HP E1351A/53A 16-Channel FET Multiplexer Module User’s Manual

Getting Started with the HP E1351A/53A

Using This Chapter

This chapter descr ibes the HP E1351A 16-Cha nne l FET and the HP E1353A 16-Channe l The r mocouple FET Multip le xer Modules, and shows how to program the modules using SCPI (Standard Co mman ds for Programmable Instruments) commands. This chapter contains the following sections:

• FET Multiplexer Module Description . . . . . . . . . . . . . . . . . . Page 11

• Multimet er Connectio n Points. . . . . . . . . . . . . . . . . . . . . . . . Page 12

• Switchbox & Scanning Voltmeter Configurations . . . . . . . . Page 14

• Digital Bus and Triggering . . . . . . . . . . . . . . . . . . . . . . . . . . Page 15

• Programming Language. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 16

• Initial Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 16

FET Multiplexer Module Description

Chapter 1

The FET multiplexer module provides high-speed switching (multiplexing) for up to 16 channels. The module can be used as a scanning multiplexer for a scanning voltmeter configurat ion, or a s a st and-alone multiplexer in a switchbox c onf igurat ion. The c hannels are numbered 00 to 15. Each channel provides connections for High (H), Low (L) and Gua rd (G), although only High and Low are switched. The FET multiplexer module can switch up to 100,000 connections per second (100 K switches/sec).

The FET multip le xer module consists of a co mpo nent a s sembly and a terminal module. There are three different terminal modules, one for each of the following applications: HP E1351A 16-Chann el FET Multiplexer Module, HP E1353A 16-Channel Thermocouple FET Multiplexer Module, and HP E1352A 32-Cha nne l Single-Ended FET Mu ltip lexer Module. Th e component assembly is the same for all three applications. For information on the 32-Channel Single-Ended FET Multiplexer Module, see the HP E1352A User’s Manual.

The component assembly contains the VXIbus interface, the FET switches, the analog bus connector and the digital bus. The terminal modules prov ide connection points for the individual channels, as well as monitoring points for the tree terminals and the direct terminals. The FET multiplexer module can be externally triggered from the VXIbus backplane or through the digital bus handshake lines on the front of the component assembly.

Chapter 1 Gettin g Started with the HP E1351A/53A 11

For high-speed operation (100 K switches/sec.) the scanning list is automatically downloaded into RAM on the multiplexer module. Triggering for c hannel adva nce is from the two handshake lines on the digital bus. The scanning operation does not require any intervention from the mainframe CPU. This only applies for switchboxes or scanning voltmeter configurations that have all FET multiplexer modules. For a downloaded sca n list in switchboxes, the trigger source must be

TRIG:SOUR DBUS or TRIG :S OUR IM M.

Multimeter Connection Points

There are three places where signals on a closed channel can be measured: analog bus connector, tree terminals and direct terminals. Each of these pro v ide s a d ifferen t c a pab i li ty for con figuri ng the modu le .

Analog Bus

Connector

The analog bus connector provides a direct connection between multiple multiplexer modules and also b etween a mult iplexer module and HP E1326/E1411 Multimeters. A ribbon cable is used to daisy-chain multiple multiplexer modules together, and to connect a multimeter to the multiplexer modules for a scanning volt meter. The command automatically closes the appropriate tree isolation switches to route closed channels to the analog bus. This command must be executed in a switchbox configuration. A scanning voltmeter automatically configures the multiplexer for the analog bus connector.

SCAN:PORT ABUS

Tree Terminals Tree terminals provide an external connection point through the terminal

modules for the signals which are on the analog bus lines. Tree terminals are the recommended connection points for connect ing stand-alone multimet ers and externa l curr ent sources for 4-wire resistance measurements.

Direct Terminals The 16 channels are s epara ted into two banks, Bank 0 and Bank 1. When a

channel is closed, that channel is connec ted to a Bank Common. Channels 00 to 07 are on Bank 0 Common and channels 08 to 15 are on Bank 1 Common. The terminal module has connection point s for t he direct terminals, where you can measure signals on the respective Bank Commons. The ban ks can be isolat ed from each other, from the analog bus connector, and from the tree terminals with the A and B tree isolation switches.

12 Getting Started with the HP E1351A/53A Chapter 1

Figure 1-1. FET Multiplexer Module Block Diag r am

Chapter 1 Gettin g Started with the HP E1351A/53A 13

Switchbox and Scanning Voltmeter Configurations

A VXIbus instru ment is a modu le or group of modules which p erform a specified fu nct ion. For the HP E1300/01 m a inframe, the first module in an instrument must have a logical address which is evenly divisible by 8 (16, 24, 112), and the rest of the module s in t he ins tr ument are nu mbered consecutively. The instrument’s secondary address is the whole number equal to the logical address divided by 8 (for a logical address of 16, 17, 18,…23, the secon dary add r ess is 02). For instru ment definition in o ther mainframes, s ee the mainfra me manual. If an instrument c onsists of onl y multiplexer modules, it is a switchbox configuration. If a multiplexer module(s) is comb ined with a mult imeter to form an instrument, that is a scannin g voltme ter configurat ion.

Switchbox A switchbox is a multiplexer module or group of multiplexer modules

which form a single instrument. A switchbox can be connected to a mu ltimeter whi ch i s a d iff erent V XIbu s in str umen t , t o a n HP-I B multimeter, or to a stand-alone multimeter. The switchbox and the multimeter have different secondary addresses. Separate configuration commands m ust be sent to the switc hbox and to the multimet er. The follo wing progra m illustrates the differe nt a ddre sses and the configuration commands requ ired. The HP-IB interface select code is 7, and the mainframe address is 09. The multiplexer has an instrument address of 24, so its secondary address is 03. The multimeter is HP-IB controlled, and has a primary ad dress of 22.

controlled

10 OUTPUT 722;"T RIG EXT;DC 10" !Sets multimeter to external trigger

and to measure DC volts

20 OUTPUT 70903;"OUTP ON" !E nab les "Trig Out" port 30 OUTPUT 70903;"TRIG:S OUR BUS" !Sets switch box to recei v e B u s

40 OUTPUT 70903;"SCAN:MO DE VO LT "!Set up switchbox for voltage

50 OUTPUT 70903;"SCAN:PO RT ABUS"!C lose s th e appropri at e tree

60 OUTPUT 70903;"ARM:COUN 2" !Set for two cycles through the

70 OUTPUT 70903;"SCAN (@100;115)"! Se le c ts th e c hannel list. 100

80 OUTPUT 70903;"INI T " !Close first c hannel to start

90 FOR I = 0 TO 15 !Start count loop 100 ENTER 722;A !Enter re adi ng i nto vari abl e A 110 PRINT A !Print reading in variable A

trigger s

measurements

isolat io n switche s while scanning, automatical ly makes conne ction to the analog bus and tree termi nal s.

scan list

selects fi rst chan ne l on card 1; 115 selects last cha nne l on card 1

scanning c ycl e

1 HP-IB is Hewlett-Packard ’s implem entat ion of IEEE Std 48 8.1-1 978

14 Getting Started with the HP E1351A/53A Chapter 1

120 TRIGGER 70903 !Trigger the s witchbox to advance

the channel list

130 NEXT I !Inc r ement count 140 END

Scanning Voltmeter When the mu ltiplexer(s) is combined with a multimeter to for m a single

instru ment, they become a virtual instrument, a scanni ng volt meter. The multiplexer(s) and the multimeter have the same secondary a ddress. Th e multimeter automatically configures the multiplexer, so the

SCAN:PORT and TRIG:SOUR commands are not required. Channel

advanc e is from the digita l bus ha ndshake lines, s o the count loop is not required. The

ARM:COUN command does not apply to do wnloaded scan

lists, so you cannot specify the number of cycles through the scan list. You can, howev er, specify

INIT:CO NT ON for continuous scanning through the

scan list.

10 DIM Rdgs(1:16) !Dimension an array for 16

readings

20 OUTPUT 70903;"*RST" !Reset instrument 30 OUTPUT 70903;"MEAS:VOLT :DC? (@100: 115)"

40 ENTER 70903;Rdgs(*) !Enter readings into array 50 PRINT Rdgs(*) !Print results 60 END

!Configure instrument

SCAN:MODE,

Digital Bus and Triggering

The HP E1351A/E1353 A can be trig gered f or channel advance from the VXIbus backplane or through the digital bus handshake cable on the front of the component assembly. Backplane triggering can come from HP-IB comput er commands over the HP-IB Bus or from th e HP E1300/1301 Mainframe "Event In" port. Digital bus triggering uses two handshake lines; channel advance and channel closed. Channel advance (input to multiplexer) triggers an advanc e, and channel closed ( output from multiple xer) signif ies a dva nce completed.

The HP E1326B Mu ltimeter has a digital bus port on t he face plate, and connects to the multiplexer with th e digital bus cable (see Figures 2-10 and 2-11). To connect other multimeters for digital bus trigg ering, you must prepare a custom cable. Use a connector like the one on the digital bus cable (HP part nu mber E1300-61611 ). C onnect the measureme nt complete port from the multimeter to the channel advance pin, and the external trigger to the channel closed pin. Conn ect the grounds for both signals to the digital bus ground (second pin from right). You can use this cable to connect an external multimeter to a switchbox, and then use

(digital bus triggering). You can also order a custom cable with

DBUS

BNC to digital bus c onnectors, HP part number E1411-80001. See Figure 2-11 for more information on multiplexer-to-multiplexer and multiplexer-to-multimeter connections.

TRlG:SOUR

Chapter 1 Gettin g Started with the HP E1351A/53A 15

Figure 1-2. Custo m Cable fo r Dig ital Bus Trig geri n g

Programming Language

The examples in this manual use the Standard Commands for Programma b le I nstruments (SCPI) commands, H ewlett-Packard BASIC and an HP 9000 Series 200/ 300 c omputer over the HP-IB. Chapter 5 contains information on SCP I c ommand f orm at . Appendix B contains details o n the registers f or regis t er-based programming.

Initial Operation

Use the following program to verify initial multiplexer operation by closing a channel and querying channel closure. The computer interfaces to the mainframe with the Hewlett-Packard Interface Bus (HP-IB). The HP-IB interface select code is 7, and the mainframe address is 09. The multiplexer has an instrume nt addre ss of 24, s o its seco ndar y ad dress is 03.

This example first resets the switchbox and then closes channel 02 of a single multiplexer module (card number 1) in the switchbox. The program next queries the channel closure state. A returned "1" shows that the channel is closed, a returned "0" designates an open channel.

10 OUTPUT 70903;"*RST" !Opens all channe ls 20 OUTPUT 70903;"CLOS (@102)" !Close channel 02 on c ard 1 30 OUTPUT 70903;"CLOS? (@102)" !Query ch annel 02 state 40 ENTER 70903;Value !Enter re sul ts in to vari abl e cal le d

Value

50 PRlNT Value !Display resul t 60 END

16 Getting Started with the HP E1351A/53A Chapter 1

Configuring the HP E1351A/53A FET

Using This Chapter

This chapter shows how to configure the 16-Channe l F ET Multiplexer Modules, how to connect external wiring and how to connect multimeters. This chapter contains the followi ng s ections:

Chapter 2

Multiplexer Modules

• Warnin gs and C aut ions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pag e 17

• Multiplexer Card Nu mber s . . . . . . . . . . . . . . . . . . . . . . . . . . Page 18

• Selecting the Interrupt Line Number . . . . . . . . . . . . . . . . . . . Page 20

• Setting the Card ID Switch . . . . . . . . . . . . . . . . . . . . . . . . . . Page 21

• Connecting User Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 22

• Adding Signal C o nditioning Co mponents/Current

Shunts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 23

• Connecting Field Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 24

• Wir ing a Termin al M odu le . . . . . . . . . . . . . . . . . . . . . . . . . . Page 25

• Connecting Multime ters and Signal Generators . . . . . . . . . . Page 26

• Analog Bus and Digital Bus Cables . . . . . . . . . . . . . . . . . . . Page 27

Warnings and Cautions

Warning SHOCK HAZARD. Only service-trained personnel who are

aware of the hazards involved should install, remove, or configure the multiplexer modules. Before you install any module, disconnect AC power from the mainframe and from user wiring.

Caution MAXIMUM VOLTAG E/CU RRENT. The maximum volt age that

may be applied between High (H), Low (L), and Guard (G) terminals is 15 V dc or 10.6 V rms (15 V peak). The maximum current is 1 mA per channel.

STATIC ELECTRICITY. Static electricity is a major cause of component failure. To prevent damage to the electrical components in the multiplexer module, observe anti-static techniques whenever removing a module from the mainframe or whenever working on a module.

Chapter 2 Configuring the HP E1351A/53A FET Multiplexer Modules 17

Multiplexer Card Numbers

HP plug-in modules installed in an HP VXIbus mainframe are treated as independent instruments each having a unique secondary HP-IB address. An instrument may be composed of a single plug-in module or multiple plug-in modu les. The card nu mber identifies the m odule w ithin a switchbox or scanning voltmeter configuration. The multiplexer module with the lowest logical addr ess is al ways card nu mber 01. The multiple x er module with the next successive address is 02, and so on. Figure 2-1 illustrat es the card numbers and logical addresses o f typical single-module switchb ox es. Figure 2-2 illustrates the card numbers and logical address es of a typical multiple-module switchbox. Figure 2-3 illustrates the card numbers and logical addresses of a typical multiple-module scanning voltmeter.

Figure 2-1. Card Numbers for Sing le- Mod ule Switch b oxes

Figure 2-2. Card Numbers for Mu ltip le-Mo d ule Switch box

18 Configuring the HP E1351A/53A FET Multiplexer Modules Chapter 2

Figure 2-3. Card Numbers for Scanning Voltmeter

The logical addres s es no ted in Figures 2-1, 2-2, and 2-3 a pply to modules installed in an HP 75000 Series B M a inframe (HP Model Number E1300A/E130 1 A) or i n a mainframe with an HP E1405/140 6 C omma nd Module. See the HP 75000 Series B Installation an d Getting Start ed Guide or the appropriat e HP Command Module Manual for more information on switchboxes and scanning voltmeter configurations, and logical addressing. For uses i n ot her systems or mainframes, see the appropriate manuals.

Setting the Address

Switch

The logical address switch (LADDR ) factory setting is 112. You may have changed the switch setting during module installation. Valid address values are from 1 to 255. Refer to the HP 75000 Series B System Installation and Getting Started Guide or the appropriate HP Command Module Manual for addre ss in g information. O therwise, refer to Figu re 2 - 4 to reset th e factory se t ting.

Figure 2-4. Setting the Logical Address Switch

Chapter 2 Configuring the HP E1351A/53A FET Multiplexer Modules 19

Selecting the Interrupt Line Number

The multiplexer module generates interrupts at the end of a downloaded scan list. The interrupt li ne number switch determines which backplane IRQ lin e will be us ed. Different mainframes an d resource mana ge r s recog niz e differ en t backplane IRQ lin es. The int errupt line number mu st be set to the line number your system is programmed to recognize. Refer to your mainframe manua l.

Refer to Figure 2-5 t o c hange t he int errupt lines. Valid line numbers are from 1 to 7. Set the interrupt line number to the mainframe interrupt handler numb er.

Figure 2-5. Setting the Interru pt Line Numb er

20 Configuring the HP E1351A/53A FET Multiplexer Modules Chapter 2

Setting the Card ID Switch

The multiplexer module can be an HP E1351A, HP E1352A or HP E1353A depending on which terminal module is installed. With a normal connection, the terminal module will automatically configure the module for the appropriate model. To ide nt i fy a module with out a terminal module, set the Card ID switch as shown in Figure 2-6. The ID numbers are:

Model Value Configuration

HP E1351A 0 all pins open HP E1352A 8 pin 3 closed HP E1353A 2 pin 1 closed

For nor mal connections, leave the switch at the factory settin g which is all pins open.

Figure 2-6. Card ID Switch

Chapter 2 Configuring the HP E1351A/53A FET Multiplexer Modules 21

Connecting User Inputs

The 16-Channel FET consists of a component module and a terminal module. If the terminal module is not desired, F igure 2-7 shows the front panel and the module’s connector pin-out which mates to the terminal module.

Figure 2-7. 16-Channel FET Multiplexer Con nect or Pin-out

22 Configuring the HP E1351A/53A FET Multiplexer Modules Chapter 2

Adding Si gn al Conditioning Compone nt s/ C ur ren t Shunts

The multiplexer module’s terminal module allows you to add components on each channel for the following:

– Low-Pass Filters – Attenuators – Current Shunts (for current measurements using a voltmeter)

Figure 2-8 shows how to install the appropriate components for the above configurations. In the figure, channel 12 shows a low pass filter configuration, channel 07 an attenuator configuration, and channel 04 a current shunt configuration.

Figure 2-8. Signal Conditio ning Compo nents/ Cu rrent Shunt s

Chapter 2 Configuring the HP E1351A/53A FET Multiplexer Modules 23

Connecting Field Wiring

Leads for the individual channels are connected through the channel terminals on the terminal modules. Multimeters and signal generators can be connected to the di rect terminals or tree terminals on the terminal modules. Figure 2-9 shows the terminal module channel terminals for the 16-Channel FET Multiplexer Module (HP E1351A) and the 16-Channel Thermocouple FET Multiplexer Module (HP E1353 A).

Wiring Guidelines • If possible, use shielded cables with the shields connected to the Guard

(G) terminals and to the low connection near the measurement point.

• Be sure the wires ma ke good connectio ns on t he screw terminals.

• For thermocouples, connect the Guard terminal to the

thermocouple’s shield lead and the low connection near the measurement poi nt.

Figure 2-9. FET Multiplexer Modules T ermin al Modu le

24 Configuring the HP E1351A/53A FET Multiplexer Modules Chapter 2

Wiring a Terminal Module

The following illustra tions show how to connect field wiring to the terminal module.

Chapter 2 Configuring the HP E1351A/53A FET Multiplexer Modules 25

Connecting Multimeters and Signal Generators

Figure 2-10 shows h ow to connect t he ana log bu s connector and the digital bus handshake cable between multiple multiplexer modules and the HP E1326B Multi meter. Use the cables shipped with the multiplexer modules to make the connections.

Stand-alone multimeters and signal generators can also be connected to the tree terminals or the direct terminals. Connections to the tree terminals and the direct terminals are made on the terminal modules. If the multimeter has "V olt meter Compl ete" and "Externa l Trigger" po rts that u se an open collector TTL pulse, you can use a custom cab le t o c onnect it to the digital bus for triggering (see “Digital Bus and Triggering” in Chapter 1).

Figure 2-10. Anal o g Bus and Digital Bus Conn ectio n s

26 Configuring the HP E1351A/53A FET Multiplexer Modules Chapter 2

Analog Bus and Digital Bus Cables

Figure 2-11 shows analog bus and digital bus cables for multiplexer-to-multiplexer and multiplexer-to-multimeter connections.

Figure 2-11. Analog Bus an d Digi tal Bus Cab les

Chapter 2 Configuring the HP E1351A/53A FET Multiplexer Modules 27

Notes

28 Configuring the HP E1351A/53A FET Multiplexer Modules Chapter 2

Chapter 3

Using the HP E1351A/53A FET Multiplexer

Modules

Using This Chapter

This chapter uses some typical examples to show how to use the 16-Channel FET and 16-Channel Thermo couple FET Multiplexer Modules. Refer to Chapter 4, “Understanding the HP E1351A/53A FET Multiplexers” for further information. This chap t er c ontains the following sections:

• Selecting Channels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 29

• Multiplexer Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 31

• Connecting Switchbox Channels to Direct

Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 32

• Connecting Switchbox Channels to Tree Terminals for

Making M e asurement s. . . . . . . . . . . . . . . . . . . . . . . . . . Page 34

• Scanning a Range of Switchbox Channels . . . . . . . . . . . . . . Page 36

• Dow nl oadin g a Sc an List. . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 39

• Scanning a Switchbox without a Downloaded

Scan List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 40

• Scanning a Switchbox with a Downloaded

Scan List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 41

• Scanning Voltme ter Configuration with

HP E1326B. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 42

• Measur i ng T e mp erature Usi ng Thermocou ples

(HP E1353A Module only) . . . . . . . . . . . . . . . . . . . . . . Page 43

Selecting Channels

Individual channels within a module or multiple-module instrument are selected with the

channel_list> commands. OPEN and CLOSe <channel_list> immedia tely

opens/clos es the specified channel. The creates a scann ing list which can be downloaded into RAM on each module.

INITiate command clos es the first channel on th e scan lis t, and th e

The selected trigger mode advances the rest of t he c hannels.

The FET Mul tiplexer M odule uses brea k-bef ore-make logic so th at a c losed channel is open ed before the next channel is closed. O nly one channel can be closed at any given time on the FET multiplexer. The only exception is

SCAN:MODE FRES (4-wire resistance measurements). You can,

in however, have a channel closed on two different modules in the same instrument.

Chapter 3 Using the HP E1351A/53A FET Multiplexer Modules 29

SCAN <channel_list> or OPEN and CLOSe

SCAN <channel_list> command

To address specific channels within a multiplexer module in a switchbox or scannin g voltme ter configuration, you mus t send the appropriate SCPI command string with a specified card number (cc) and channel number (nn). The card number refers to the multiplexer module within a switchbox or scanning voltmeter configuration. The multiplexer module with the lowest logical address in a VXIbus instrument is card number 01, and the next consecutively numbered multiplexer module is card number 02. If you have more than one switchbox or scanning voltmeter configuration, the card numbering s equence starts at 01 for eac h c onf igurat ion. A channel address is, therefore, a four digit number (ccnn). For channel 07 on card 02 the address is 0207. You can delete leading zeros, so 207 is also a valid channel address. The channel address

<channel_list> is in the form:

• (@ccnn) for a single channel;

• (@ccnn,ccnn) for multiple channels;

• (@ccnn:ccnn) for sequential channels;

• (@ccnn:ccnn,ccnn:ccnn) for groups of sequential channels.

OPEN and CLOSe commands should only be used with th e

The single-channel format and for one unique application of the multiple-channel format. You can close a channel on tw o different cards in the same instrument (e.g., 102 a nd 208) at the same time. You cannot close two channels on the same card at the same time (102 and 108). Closing a channel automatically opens all other channels on that card.

CLOSe (@102,208,309) Closes 02 on card 1, 08 on card 2

and 09 on card 3.

CLOSe (@103,204) Opens 102 and 208, clo ses 10 3 and

204; 309 left closed.

30 Using the HP E1351A/53A FET Multiplexer Modules Chapter 3

Multiplexer Commands

The following commands are c overed in Chapter 3. For a complete list and description of commands see Chapter 5, “Command Reference”.

Table 3-1. Matrix Command s Used in Chapter 3

Command Descriptio n

ARM:COUNt <

INITiate[:IMMediate] INITiate: CO NTi nu ous <

mode> = 1 | 0 | ON | OFF

< [ROUT e : ] CLOS e < [ROUT e: ]C L O Se? < [ROUTe:]OPEN < [ROUTe:]SCAN <

[ROUTe:]SCAN: MO DE FRES Closes paired channel relays (fo r examp le, ch annels 01 and 09)

[ROUTe:]SCAN:PO RT ABUS Automatically closes the tree isolation switches. TRIGger[:IM Mediat e] TRIGger:SOURce <

source> = EXT | BUS | DBUS | IMM

number> Selects number of scan ning cyc les fo r a switchbo x only. Does not

apply to download ed scan li sts. Channel advance for TRIGger:SOURce BUS | HOLD.

mode>

channel_l ist >

chan ne l_l ist > channe l_list> channe l_list>

source>

NOTE: The comm ands with brackets ([ ]) are implied and are not sho wn in this chapt er .

Enables/dis abl es cont inuous scann ing cycl es .

Closes specified chan n els. Queries mainframe for channel clos ure. Opens specified channels. Closes all channels in chann el list one at a time. Previous channel

opens before n ext chan n el closes.

during 4-wir e ohms measu r emen ts .

Channel advance for TRIGger:SOURce BUS | HOLD. Selects the trigger source as EXTernal, HP-IB BUS, Digital BUS,

or IMMed i ate.

Chapter 3 Using the HP E1351A/53A FET Multiplexer Modules 31

Connecting Switchbox Channels to Direct Terminals

The direct terminals pr ovide direct acc ess to c losed c hannels. There is a direct terminal f or eac h bank, Bank 0 and Bank 1. Closing any channel in Bank 0 (c hannels 00 to 07) connects the channel to the Bank 0 dir e c t terminal. Closing any channel in Bank 1 (channels 08 to 15) connects the channel to the Bank 1 direct terminal. You can isolate the two banks from each other, and from the analog bus connector and tree terminals, with the

SCAN:PORT NONE command. This command op ens the A and B tree

isolation switc hes. Figu re 3-1 shows how to connect channels 02 an d 09 of a single modul e to their respectiv e direct terminals. Only one channel can be c losed a t a time.

SCAN:PORT NONE Opens Tree Isolation S witches. CLOSe (@102) Closes channel 02 on card 01. CLOSe (@109) Opens 02 the n close s 09.

Figure 3-1. Connecti n g Channel s 02 and 09 to their Respect ive

Direct Terminals

32 Using the HP E1351A/53A FET Multiplexer Modules Chapter 3

Comments Isolation. The direct terminals pr o vide a more accur at e measurement than

the tree terminals or the analog bus connector as the signal does not have to travel through the extra FET switches. The opens the tree isolation switches and isolates the direct terminals from the tree terminals and the analog bus connector.

SCAN:PORT NONE command

The default valu e of have not specified a different

SCAN:PORT is NO N E for reset and power-on. If you

SCAN:PORT since reset or power-on, you do

not need to execute this command. You can also use the direct terminals

SCAN:PORT ABUS. The signal for a given closed c hannel will t he n

with be available at the direct terminal for that bank, the A tree terminal and the analog bus co nnect or.

Closing Channels. The FET multiplexer module only allows one channel per card to be closed at a time, except for

SCAN:MODE FRES (4-wi re

resistance measurements) where two channels are closed. You can close a channel on two different cards in the same instrument at the same time.

SCAN <channel_list> comma nd a llow s you to specify a list of channels

The to be closed s equen tially. The FET multiple xer module uses a break-before-make procedure, so closed channels are opened before the next one on the list is closed. The channels are advanc ed acc ording to the

TRIGge r mode selected.

Query Open/Closed Channels. Th e

channel_list> c ommands determine if the channel(s) in the channel list are

CLOSe? <channel_list> and OPEN?

open or closed, res pectively. (The query c ommand does not determine if, in the event of a hardware failure, the channel remains open/closed.) For example, to determine if channel 109 is closed, execute:

CLOS? (@109)

A response of "1" indicates th e channel is c lo sed, and a "0" ind icat es the channel is open. The reverse is true for the

OPEN? <channel_list >

command. Th e response for the OPEN? and CLOSe? comman ds are:

CLOS? 1 = Closed

0 = Open

OPEN? 1 = Open

0 = Closed

To find out which c hannel on a card is closed, use a channel list for the card.

CLOS? (@100:115)

and enter the response into a string variable. If channel 09 is closed, the response will be:

0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0

NOTE: You must read the response after sending a query command or the switchbox will generate an error.

Chapter 3 Using the HP E1351A/53A FET Multiplexer Modules 33

Connecting Switchbox Channels to Tree Terminals for Making Measurements

Connect external multimeters to the A tree terminal. The SCAN:PORT

command closes the appropriat e FETs on the A and B tree isolation

ABUS

switches, so that the channels that are closed are connected to both the analog bus connector and the tree terminals. The A tree terminal is connect ed to the H, L, and G lin es, and t he B tree terminal is con nected t o the I +, I- and G lines. Figure 3-2 shows how to connect multime t ers to measure channel 02 and channel 09.

SCAN:PORT ABUS Enables tree i sola tion switches. CLOS (@102) Close channel 02 on card 01. CLOS (@109) Open 02, close 09.

Figure 3-2. Closing Channels 02 and 09 for a Voltage Measurement

34 Using the HP E1351A/53A FET Multiplexer Modules Chapter 3

Example: Connect

Channels 02 and 10 to

Tree Terminals for

4-Wire Ohms

Measurement

The SCAN:MODE FRE S command separates Bank 0 and Bank 1 for 4-wire resistance measurements or other stimulus/response testing. Current or signals are connected to the B tree terminal and go out through a channel on one bank. The voltage signal response comes in through a channel on the other bank and goes to the A tree terminal and the analog bus connector. The current source and voltage response must be on channels that are eight numbers apart (f or examp le, 02 an d 10, 15 and 07). You only need to specify the channel that the voltage reading is on as the FET multiplexer automatically closes the corresponding channel eight numbers away. Figure 3-3 shows a current source on channel 10 and the voltage reading on channel 02.

SCAN:MODE FRES Isolates B ank 0 fro m Ban k 1. CLOSe (@102) Closes channels 02 and 10. 02 is

routed to A tree termina l and 10 is routed to B tree termina l.

Figure 3-3. Connecting Channels 02 and 10 for 4-Wire Ohms Measurement

Chapter 3 Using the HP E1351A/53A FET Multiplexer Modules 35

Scanning a Range of Switchbox Channels

You can scan a ran ge of channels o f a s witchbox consisting of single or multiple multiplexer modules. Scanning involves sequentially closing each channel on a range of specified channels. The selected determines when the channel closure will advance. During scanning, the FET which was previously closed opens before the next FET closes.

TRIGge r m ode

Example: Maki ng

Voltage Measurements

by Scanning

You can use any of th e

TRIGger:SOURce EXTernal requires an external trigger source to be connected

TRIGger mo des to advance the channel list.

to the HP E1300/1301 Mainframe "Event In" port. For computer controlled or HP-IB triggering (

OUTput ON command enables the mainframe’s "Trig Out" port to synchronize

multimeters when not in the

For the fastest scan rat e (up to 100 K switc hes/sec.) use

. Use a custom cable (see “Digital Bus and Triggering” on page 15)

DBUS

TRIGger or *TRG) use TRIGger:SOU Rce BUS. The

TRIGger:SOURce DBUS | IMM modes.

TRIGger:SOURc e

to connect the multimeter handshake lines (Voltmeter Complete and External Trigger) to the multiplexer digital bus.

Figures 3-4 and 3-5, and the following commands, show how to make voltage measurem e nts by p erforming a singl e scanning cycle of all channels on two multiplexer modules in a single switchbox. In the example, the:

• A Tree Terminals of each terminal module connect to each other and

to the multimeter in Figure 3-5. To connect the A tree terminals to each other, use either the analog bus cables (shown in Figures 2-10 and 2-11) or wire the terminals together between the terminal modules.

• HP-IB Bus trigger co mmand advances the switchbox channel list.

• HP E1300A/E1301 A Main frame’s "Trig Out" pulse synchron izes the

switchbox with the multimeter.

• Multimeter HP-IB select code is 7 and primary address is 22.

• Switchbox HP-IB select code is 7, the HP-IB primary address is 09,

and the HP-IB secondary address is 14.

• Computer is an HP Serie s 200/300 Comput er w ith HP BASIC using

HP-IB.

Enter and Execute:

10 OUTPUT 722;"T RIG EXT;DC 10" !Sets mu ltime te r to exte rna l

triggers and to measure dc volts

20 OUTPUT 70914;"OUTP ON" !E nab les "Trig Out" port 30 OUTPUT 70914;"TRIG:S OUR BUS" !Sets switch box to receiv e bu s

trigger s

40 OUTPUT 70914;"SCAN:MO DE VO LT "!Se t up switchbox to measure

voltage

50 OUTPUT 70914;"SCAN:PO RT ABUS"!C lose s th e appropri at e tree

isolat io n switche s whil e scan ning; automatical ly makes conne ction to the analog bus and tree termi nal s.

36 Using the HP E1351A/53A FET Multiplexer Modules Chapter 3

60 OUTPUT 70914;"SCAN (@100:215)"! Sele cts th e channe l list; 100

selects th e first channe l of module #1 and 215 selec ts t he last channel of module #2.

70 OUTPUT 70914;"INI T " !Close first c hann el to start t he

scanning c ycl e

80 FOR I = 1 TO 32 !Start count loop 90 ENTER 722;A !Ent er reading into vari abl e A 100 PRINT A !Print reading in variable A 110 TRIGGER 70914 !Trigger the s witchbox to advance

120 NEXT I !Inc r ement count 130 END

the scan l ist

Figure 3-4. Scanning Chan nels 100 to 215 of a Two- Mod ule Switch b ox

Chapter 3 Using the HP E1351A/53A FET Multiplexer Modules 37

Figure 3-5. Mainframe to Multimeter Connection for Synchronization

Example: Maki ng

2-Wire Ohms

Measurements by

Scanning

Example: Maki ng

4-Wire Ohms

Measurements by

Scanning

Use the same setup shown in the first progra m example in t his section, except the current source from the multimeter must be c onne cted to the B tree terminal. Change the commands in lines 10 and 40 to the following:

10 OUTPUT 722;"TRIG EXT;OHM" !Set multimeter to 2-wire ohms 40 OUTPUT 70914;"SCAN:MO DE RES"!Closes the appropriate tree

isolat ion s witches

This command, when used with SCAN:PORT ABUS and SCAN <channel_list> commands, automatically closes the chann els defined in the channel list, along with the appropriate tree isolation switches. The current source is superimposed on the channel being measured.

This type of measurement requires a paired channel closure (fo r example, channels 02 and 10). Us e the

SCAN:MODE FRES command to

automatically close the paired channels to the selected channels defined in

SCAN <channel_list > c ommand. C onnect High and Low to a Bank 0

the channel and High and Low to the paired channel eight numbers away. Use only one of the channels of the chann el pairs i n the channel_list. Change the commands in lines 10, 40 and 60 to t he following:

10 OUTPUT 722;"TRIG EXT;O HM" !Set mu ltime te r to 4-wire ohms 40 OUTPUT 70914;"SCAN:MO DE F RES"! Clo ses t he appropriat e tree

isolat ion s witches

60 OUTPUT 70914;"SCAN (@100:107,200: 207)"

38 Using the HP E1351A/53A FET Multiplexer Modules Chapter 3

Example: Maki ng

Multiple Scans

The ARM:CO UNt <number> command selects multiple scanning cycles for switchbox es with non-downloaded scans. It d oes not apply when the

TRIGger:SOURce is DBUS or IMMedi ate.

Example: Maki ng

Continuous Scans

Comments Scanning consists of six steps:

Add the command bef ore the example in this section. When the last channel in a channel list is closed, the pointer is reset back to the beginning of the channel list. The next trigger opens the last channel and closes the first one. This continues for the specified number of cycles.

59 OUTPUT 70914;"ARM:COUN 10" !Enable s 10 sc anni ng c y cle s 60 OUTPUT 70914;"SCAN (@100:215)"!Sets scan list 80 FOR I = 1 TO 320

The INITiate:CONTinuous ON command selects continuous scanning cycles

INIT:CO NT OFF disables continuous scanning cycles). Add the command

( to the first program example in this section, as follows:

59 OUTPUT 70914;"INI T :CONT ON" !Enables continuous sca nni ng

60 OUTPUT 70914;"SCAN (@100:215)"! Se ts scan list 80 FOR I = 1 TO X !Set the number of measurements

SCAN <channel_list> in the first program

cycles

desired

• Connecting the multimeter to the switchbox

• Selecting the SCAN:MODE

• Selecting the SCAN:PORT

• Selecting the TRIGger:SOURce

• Specifying the SCAN <channel_list>

• Starting the scan (INIT or TRIG[:I MMediate])

Downloading a Scan List

The FET Multiple xer Module is primarily designed to be used as a high-speed scanning switchbox or scanning voltmeter. To enable it to make 100,000 c onnect io ns per secon d, the downloaded into R AM on the module. This download takes place automatically when you use

. For a multiple-module switchbox, the entire scanning list is

IMM

downloaded to each module. The channels are advanced to the next channel in the channel list wit hout any direct intervention by t h e mainframe CPU during the scan.

The scan list is not downloaded for a switchbox or scanning voltmeter that combines both FET and relay multiplexer modules, or for

TRIGger:SOURce BUS | EXT | HOLD. The channel closings are controlled

by the mainframe CPU. Also, the not apply to downloaded scan lists. You can use for continuous scanning with downloaded scan lists.

TRIGger:SOURce DBUS or TRIGger:SOURce

Chapter 3 Using the HP E1351A/53A FET Multiplexer Modules 39

SCAN <channel_list> scanning list is

ARM:COUNt <number> command does

INITiate:CONTinuous O N

Scanning a Switchbox without a Downloaded Scan List

This example shows a FET switchbox connected to a multimeter with the analog bus cable. The switchbox and multimeter are separate VXIbus instrume n ts. The multimeter has a secon d a ry add r ess of 03, an d the switchbox has a secondary address of 04. The multiplexer is triggered by

*TRG command. OUTPut ON is enabled, and the multimeter is

the triggered by the fol lowing prog r am illustrates the pr o cedures:

10 DIM Rdgs(1:16) !Dimension array to store readi ngs 20 OUTPUT 70903;"*RST;*OPC?" !Clear the multimeter; *OPC?

30 ENTER 70903;A 40 OUTPUT 70903;"*CLS" 50 OUTPUT 70904;"*RST" !Reset multiplexer 60 OUTPUT 70904;"*CLS" 70 OUTPUT 70903;"CONF:V OLT: DC 58. 1"!Co nfi gure the multime ter 80 OUTPUT 70903;"TRI G:SO UR EXT " !External trigge r source 90 OUTPUT 70903;"TRI G:CO UN 16" !Set for 16 triggers 100 OUTPUT 70903;"INIT" !Initialize multimeter wait for

110 OUTPUT 70904;"TRIG:SOUR BUS" !Trigger on *TRG command 120 OUTPUT 70904;"SCAN:MODE VOLT" !Configure for voltage 130 OUTPUT 70904;"SCAN:PORT ABUS"!Enables analog bus 140 OUTPUT 70904;"SCAN (@100:115)"!Ent er sc an l ist 150 OUTPUT 70904;"OUTP ON" !Enable main frame trig out port 160 OUTPUT 70904;"INIT" !Close first c hannel 170 FOR I = 1 TO 16 !16 channels 180 OUTPUT 70904;"*TRG" !Tri gge r for c han nel adv an ce 190 WAIT .25 !Allo w time for measurement

200 NEXT I !Increment counter 210 OUTPUT 70903;"FETC?" !Multime t er re tri e ve s re adi ng s

220 ENTER 70903;Rdgs(*) !Put readings in array 230 PRINT Rdgs(*) !Print 240 END

OUTPut ON trigger to its "External Trigger" port. The

ensures reset is comple t ed before program continues

trigger

before next advance

from mainframe memory when scan complete s

40 Using the HP E1351A/53A FET Multiplexer Modules Chapter 3

Scanning a Switchbox with a Downloaded Scan List

This example shows a FET switchbox connected to multimeter with the analog bus cable and the digital bus cable. The switchbox and multimeter are separate VXIbus instruments. The multimeter has a secondary address of 03, and the switchbox has a secondary address of 04. The triggering is through the digital bus handshake lines, so the scan list is downloaded. The fol lowing prog r am illustrates the pr o cedures:

10 DIM Rdgs(1:16) !Dimension array to store readi ngs 20 OUTPUT 70903,"*RST,*OPC?" !Clear the multimeter; *OPC?

ensures reset is comple t ed before program continues

110 OUTPUT 70904;"STAT:OPER:ENAB 256"

120 OUTPUT 70904;"TRIG:SOUR DBUS"!Di gi tal bus trigger s 130 OUTPUT 70904;"SCAN:MODE VOLT"!Configure for voltage 140 OUTPUT 70904;"SCAN:PORT ABUS"!Enables analog bus 150 OUTPUT 70904;"SETT:TIME MAX,(@100)"

160 OUTPUT 70904;"SCAN (@100:131)"!Ent er sc an l ist 170 OUTPUT 70904;"INIT" !Close first c hannel 180 OUTPUT 70903;"FETC?" !Multime t er re tri e ve s re adi ng s

190 ENTER 70903;Rdgs(*) !Put readings in array 200 PRINT Rdgs(*) !Print 210 END

trigger

!Enable ope ration complete bi t

!Delay for signal to set tle before multiplexer enables channel closed pulse

from mainframe memory when scan complete s

Chapter 3 Using the HP E1351A/53A FET Multiplexer Modules 41

Scanning Voltmeter Configuration with HP E1326B

This example shows an HP E1326B Multimeter and an HP E1351A/ E1353A Multiplexer combined into a single VXIbus instrument, a scanning voltmeter. The secondary address for the scanning volt meter is 03. Both the analog bus connector and the digital bus connector are used. Once the scanning starts, there is no intervention from the mainframe CPU. The scan list is in RAM on the multiplexer, and the two handshake lines on the digital bus control the triggering.

The following program illustrates th e proc edures :

10 DIM Rdgs(1:16) !Dimension array to store readi ngs 20 OUTPUT 70903;"*RST;*OPC?" !Clear the multi met e r; O PC?

ensures reset is comple t ed before program continues

30 OUTPUT 70903;"*CLS" 40 OUTPUT 70903;"CONF:V OLT: DC (@100:115)"

!Configures mul ti met er; also automatically configures multiplexer for SCAN:MODE, SCAN:PORT and TRIG:SOUR

50 OUTPUT 70903:"INIT" !Close first channel, start scan 60 OUTPUT 70903;"FETC?" !Retri ev e rea din gs from mai nf rame 70 ENTER 70903;Rdgs(*) 80 PRINT Rdgs(*) 90 END

Figure 3-6. Connect in g the Anal o g Bus and Digital Bus Cable s

42 Using the HP E1351A/53A FET Multiplexer Modules Chapter 3

Measuring Temperature Using Thermocouples (HP E1353A Module only)

The thermocouple terminal module automatically configures the HP E1353A FET Multiplexer Module for thermocoup le r eadings. The multimet er measu r es th e resistance of a th ermistor on the term inal module to provide a reference t emperat ure. This re feren ce temperatu re is used to compensate for the change in temperature between the thermocouple (desired measurement) and the terminal temperature (see “Comments” later in this section).

Setup for

Measuring

Thermocouple

Temperature using

an Extern al

Multimeter

Figure 3-7 shows how to set up channel 01 of a single module switchbox to measure temperature using a thermocouple and an external multimeter.

Figure 3-7. Temperature Measuremen t Using a Thermocoup le

Chapter 3 Using the HP E1351A/53A FET Multiplexer Modules 43

Comments Measuring Temperature with the HP El326B/El411B Multimeters. The

HP E1326B/E1411B Multimeters can directly measure channels of single or multiple multiplexer modules. The multimeter automatically calculates the correct temperature for the specific thermistor or thermocouple type used. For more information, se e the HP E1326B/E1411B Multimeter User’s Manual.

Thermocouple Compensated Measurements. The HP E1353A FET Multiplexer makes thermocouple compensated measurements. Thermocouple compensation accounts for the temperature inside the multiplexer terminal module, which can affect the thermocouple reading. Thermocouple compensated measurements are made with the HP E1326B/E1411B. More information on th ese types of measu rements can be found in He wl ett-Packard Application Note 290, Practical Temperature Measurements.

High-Speed Temperature Measurements. High-speed temperature measurements can be made by measuring the thermocouple voltage, compensating the reading, a nd then converting th e voltage to a temperature. The instrument configuration us ed f or thes e types of measurements may include an E1326B/E1411B Multimeter and a FET multiplexer switchbox, or an external voltmeter used with the FET switchbox. The procedure for these types of measurements is:

1. Measure t he r esistance of the thermistor (channel 93) on the multiple xer terminal mod ule (

2. Measure the thermocouple voltage on the multiplexer channel.

3. Convert the thermistor resistance to a temperatur e using the follo wing equation:

t = 1.0 / ( A + B t = t - 273.15 convert K elvin to Centigrade

where:

A = 0.00128463 B = 0.00023625 C = 9.2697E-8 lnr = natural log o f t he measured th ermistor r e sistance

A, B, and C are the curve-fitting constants for the multiplexer’s 5K thermistor.

4. Convert the thermistor t emp eratur e (step 3) to a voltage using the reference table for the type of thermocouple used.

lnr + C * (lnr)3)calculate temperature

CLOSe(@cc93)).

5. Subtract the voltage (step 4) from the thermocouple voltage measured in step 2. Convert the difference between the voltages to a temperature, again using the reference table for the type of thermocouple used.

6. Add the temperature (step 5) to the thermistor temperature computed in step 3 to obtain t he result of t he the rmocouple measur em e nt.

44 Using the HP E1351A/53A FET Multiplexer Modules Chapter 3

Understanding the HP E1351A/53A FET

Multiplexer Modules

Using This Chapter

This chapter explains techniques to scan the channels of 16-Channel FET and 16-Channel The r mocouple FET Mult ip le xer Modules. This chapt er contains the following sections:

• Commands for Scanning Switchbox Channels . . . . . . . . . . . Page 45

• Using S c ann in g Tri gger S ources. . . . . . . . . . . . . . . . . . . . . . Page 45

• Using the Scan Complete Bi t. . . . . . . . . . . . . . . . . . . . . . . . . Pag e 52

Commands for Scanning Switchbox Channels

Scanning multiplexer channels consists of closing a set of channels, one at a time. The multiplexer has single, multiple, or continuous scanning modes. See Figure 4-1 for the dif ferent commands us ed in scanning.

Chapter 4

Using Scanning Trigger Sources

The TRIGger:S OURce command specifies the source to advance the channel list. Figure 4-2 shows the different trigger sources.

uses the digital bus handshake lines. You can use th e TRIG[:IMM]

DBUS

command t o imme diately advance the channel list whil e in the TRIG:SOUR

or TRIG:S OUR HO LD mode. (Note that TRIG:SOUR IMM is not the

BUS

TRIG[:IMM].) To enable the HP E1300/E130 1 Mainframe "Trig

OUTP ON c omma nd. The "Event In" mainfra me trigger

TRIG:SO U R E XT command. "Tri g Out" and

• HP-IB select code of 7

• HP-IB primary address of 09 for the HP E1300/E1301 Mainframe

Scanning with

External

Instruments

same as Out" port, use the source is reserved with the "Event In" are mainframe resourc es, and can only be allocated to o ne instrume nt at a time .

The examples in this c hapt er s how diff erent ways t o scan channels of a switchb ox in an HP E1 300/E1301 Mainframe. The operation is similar to other HP VXIbus mainframes with HP command modules that have "Trig Out" and "Event In" ports. The computer used in the examples is an HP Series 200/300 used with HP B ASIC as t he program language. The computer interfaces with the mainframe over HP-IB. Assumed is an:

TRIG:SOUR

• HP-IB primary address of 22 for the HP 3457A Multimeter

• HP-IB secondary address of 14 for the multiplexer module

Chapter 4 Understanding the HP E1351A/53A FET Multiplexer Modules 45

Figure 4-1. Scanning Commands

46 Understanding the HP E1351A/53A FET Multiplexer Modules Chapter 4

Imme di ate Tri ggering (TRI G :SO UR I MM)

Sets immediate internal triggering. The scan list is automatica lly advanc ed t hrough t h e scan list. Due to the high speed of the FET multiple xer, this mode should b e used with consid erat ion f or th e capabi li ty of th e multimeter. This is the default trigger mode.

Trigger Hold (TRIG:SO UR HO LD)

Handshake Tr igger ing (T RIG:SO UR BUS)

Uses digital bus on faceplate of multiplexer module. Channel Advance and Chan n el Closed contin u ousl y handsh a k e with Voltmeter Ready and Voltmet er Com plet e unti l scanning list has completed specified numb er of cycles.

Advancing Scan (TRIG[:IMM]

This command advan c es the scan lis t when in TRIG:SOUR HOL D or TRIG:SOUR BUS. Advanc es the scan list one channel per command.

Prevents execution of triggers until trigger source is chang ed. Can us e TRIG[:IMM] command to trigg er a switchbox set to TRIG:SOUR HOLD.

External Trig g eri ng (TRIG:SOUR EXT)

Trigger source is a user supplied input to the Event In BNC. Use a +5V negative-going pulse to trigger. TRIG:SOUR EXT r eserves th e Event In resource so it i s not available f or a ny other ins trumen t in the mainframe.

Bus Triggering (TRIG:SOUR BUS)

Defines Trigger sou rce as *TRG or HP-I B GET command exec uted over the HP-IB. The scan list is advan ced one channel for each *TRG or GET command received.

En a blin g Trig Out Po r t (OUTP ON)

Generates a +5V negativ e-going pulse each time a channel advances. OUTP ON reserves the Trig O ut Port so it is no t av ai labl e for any other instrument in the mainframe.

As an alternative to OUTP ON, the Channel Closed on th e digital bus also puls es for each channel clos ure.

Figure 4-2. Trigger Sources

Chapter 4 Understanding the HP E1351A/53A FET Multiplexer Modules 47

Example: Scanning

with External

Instruments

This example uses the mainframe "Trig Out" port to synchronize the multiplexers to an HP 3457A Digital Mu lt imeter. See the following figure for typical c onnect ions. For this example, use the trigger output pulse of the mainframe "Trig Out" port to trigger the multimeter from its "External Trigger" port.

The sequence of operation is:

INIT (line 70) closes channel number 100.

2. The channel closure causes a trigger output from the "Trig Out" port.

3. The trigger causes the multimeter to make a measurement.

4. Measurement result is sent to the computer ( lines 80 to 100).

TRIGGER command (line 110) a dva nces the channel list to the next

5. channel.

6. Steps 2-5 are repeated for channels 101 through 115.

10 OUTPUT 722;"TRI G E XT;DCV" !Sets multimeter to external trigger

and to measure dc volts

20 OUTPUT 70914;"O UT P ON" !Enables "Trig Out" port 30 OUTPUT 70914;"TRI G:SO UR BUS" !Sets switchbox to receive bu s

40 OUTPUT 70914;"SCAN:MO DE VOLT "! Sets switchbox to measure

50 OUTPUT 70914;"SCAN:PORT ABUS" !Closes the tree isolation switches 60 OUTPUT 70914;"SCAN (@100:115)"!Selec ts the channel list for

70 OUTPUT 70914;"INIT" !Starts scanning cycle 80 FOR I = 1 TO 16 !Start count loop 90 ENTER 722;A !Ent er reading into vari abl e A 100 PRINT A !Print reading in variable A 110 TRIGGER 70914 !Trigger the s witchbox to advance

120 NEXT I !Inc r ement count 130 END

trigger s

voltage

scanning

the channel list

48 Understanding the HP E1351A/53A FET Multiplexer Modules Chapter 4

Example: Scanning

Using "Trig Out" and

"Event In" Ports

This example uses the mainframe "Trig Out" and "Event In" ports to synchronize the multiplexers to an HP 3457A Digital Multimeter. See the follo wing figure for typical connections.

For this example, use the trigger output pulse of the mainframe’s "Trig Out" port to trigger the multimeter from its "External Trigger" port. Note that the pulse output from the multimeter’s "Voltmeter Complete" port triggers th e switchbox to advance the channel list. Use the multimeter’s rea ding st o ra ge capability to store readings.

The sequence of operation is:

INIT (line 50) closes channel number 100.

2. The channel closure causes a trigger output from the "Trig Out" port.

3. The trigger causes the multimeter to make a measurement.

4. Measurement result is stored into multimeter memory.

5. Trigger is out put fr om multimeter’s " Voltme ter Complete" port.

6. Trigger to "Event In" port advances the channel list to the next channel.

7. Steps 2-6 are repeated for channels 101 through 115.

10 OUTPUT 722;"T RI G E XT: DCV:M EM FIFO"

!Sets multimeter to external trigger to measu re dc volts and store readings

20 OUTPUT 70914;"O UT P ON" !Enables "Trig Out" port 30 OUTPUT 70914;"TRI G:SO UR EXT " !Sets switchbox to recei ve ex te rnal

trigger s

40 OUTPUT 70914;"SCAN (@100:115)"!Selec ts the channel list (c hannels

100 to 115)

50 OUTPUT 70914;"INIT" !Start s scan nin g cyc le 60 END

Chapter 4 Understanding the HP E1351A/53A FET Multiplexer Modules 49

Example: Scanning

Using Stand-Alone

Multimeter and Digital

Bus Triggering

This example is similar to the previous one except that the multimeter’s "External Trigger" and "Voltmeter Complete" ports are connected to the "Channel Closed" and "Channel Advance" on th e FET Multiplexer digital bus. See Chapter 1 for information on making custo m digital bus cab les. Once the scanning procedure has been initiated ( by the handshake lines. The

INIT co mmand closes the first channel, and when

INIT), the channel closure is advanced

the channel is closed, the " Channel Closed" pulses. This is connected to th e "External Trigger" on the multimeter, which triggers a reading. When the reading is complete, the "Voltmeter Complete" triggers, which pulses the "Channel Advance". This procedure continues until the end of the scan list.

The sequence of operation is:

TRIG:SOUR DBUS selects digital bus triggering .

INIT (line 50) closes channel number 100.

3. The channel closure causes a trigger output from t he "Chann el Closed" port.

4. The trigger causes the multimeter to make a measurement.

5. Measurement result is stored into multimeter memory.

6. Trigger is out put fr om multimeter’s " Voltme ter Complete" port.

7. Trigger to "Advance Channel" port advances the channel list to the next channel.

8. Steps 3-7 are repeated for channels 101 through 115.

10 OUTPUT 722;"T RI G E XT; DCV;M EM FIFO"

!Sets multimeter to external trigger to measu re dc volts and store readings

20 OUTPUT 70914;"SCAN:PORT ABUS" !R out es c h an ne ls to analog bus

connecto r and A tre e termi nal

30 OUTPUT 70914;"TRIG:SO UR DB US"!S ets switchbox to rec eiv e exte rnal

trigger s

40 OUTPUT 70914;"SCAN (@100:115)"!Selec ts the channel list (c hannels

100 to 115)

50 OUTPUT 70914;"INIT" !Starts scanning cycle 60 END

50 Understanding the HP E1351A/53A FET Multiplexer Modules Chapter 4

Example: Scanning

Using Scanning

Voltmeter

Configuration and

Digital Bus Triggering

In this example the HP E1326B Mult imeter is combined with a FET multiplexer to form a scannin g voltmeter VXIbus instrument. The multime t er is addr ess 24, and th e mu ltip lex er is addre ss 25, s o th e instrument secondary address is 03. The analog bus connector and the digital bus connector are connected between the modules. The

TRIG:SOURce is set for DBUS. This configuration provides the fastest

speed. Consult the HP E1326B/E1411B Multimeter User’s Manual for further i nformat ion o n multimeter s et tings. Note that the

ARM:COUNt

command does not apply to downloaded scan lists.

The sequence of operation is:

1. The multimeter automatically configures the multiplexer for

SCAN:MODE, SCAN:PORT and TRIGger:SOURce DBUS. INIT closes first channel.

3. The channel closure causes a trigger output from t he "Chann el Closed" port.

4. The trigger causes the multimeter to make a measurement.

5. Measurement result is stored into multimeter memory.

6. Trigger is out put fr om multimeter’s " Voltme ter Complete" port.

7. Trigger to "Advance Channel" port advances the channel list to the next channel.

8. Steps 3-7 are repeated for channels 101 through 115.

10 DIM Rdgs(1:16) !Dimension array for readings 20 OUTPUT 70903;"*RST" !Reset scanning voltmeter 30 OUTPUT 70903;"CONF:V OLT DC (@ 100: 115)"

!Sets multimeter to measure dc volts

40 OUTPUT 70903;"INIT" !Starts scanning cycle 50 OUTPUT 70903;"FETC?" !Get the readings 60 ENTER 70903;Rdgs(*) !Place values in array 70 PRINT Rdgs(*) !Print values 80 END

Chapter 4 Understanding the HP E1351A/53A FET Multiplexer Modules 51

Using the Scan Complete Bit

You can use the Scan Complete Bit (bit 8) in the SCPI Operation Status Register to determine when a scanning cycle completes (no other bits in the register apply to the switchbox). Bit 8 has a decimal value of 256 and you can read it direc t ly with t he

STATus:OPERation[:EVENt]? command in Chapter 5 for an example).

Note that this is not the same register as the multiplexer Status/Control Register.

STAT:OPER? command (refer to the

Example: Scan

Complete Monitor

When enabled by the

STAT:OPER:E NAB 2 5 6 comma nd, the Scan Complete

Bit will b e reported as bit 7 of the Status Register. Us e the HP -IB Serial Poll or the IEEE 488.2 Common Command Register. When bit 7 of the status Register is enabled by the

*STB? to read the Status

*SRE 128

Common Co mman d to assert an HP-IB Service Request (SRQ), you can interrupt the controller when the Scan Complete Bit is set, after a scanning cycle completes. This allows the controller to do other operations while the scannin g cycle is in progress.

The following example monitors bit 7 in the Status Register to determine when the scanning cycle completes. The computer used in the example is an HP Series 200/300 us ed wit h HP BASIC as the program language. The computer interfaces with the mainframe over HP-IB. The HP-IB select code is 7, the HP-IB primary address is 09, and the HP-IB secondary address is 14.

10 OUTPUT 70914;"*CLS" !Clear all switchbox status

structure

20 OUTPUT 70914;"STAT:OPER:ENAB 256"

!Enable Scan Comp le te Bit to set bit 7 in Stat us R eg ist e r

30 OUTPUT 70914;"*SRE 128" !Enable bit 7 of Status Register to

40 OUTPUT 70914;"TRI G:SO UR EXT " !Set to external trigger mode 50 OUTPUT 70914;"SCAN (@100:115)"!Selec t cha nne ls t o be scan ne d 60 OUTPUT 70914;"INIT" !Start scanning cycle 70 WHILE NOT BIT (SPOLL(70914),7) !Waiting for scan complete 80 PRINT "DO OTHER OPE RATION HERE"

90 END WHILE 100 PRINT "INTERRUPT GENERATED" !Program goes to this line after

110 END

assert SRQ

!Enter program line s for compu te r to do other operations

interrupt is generat ed by a complete d scanni ng c yc le

52 Understanding the HP E1351A/53A FET Multiplexer Modules Chapter 4

HP E1351A/53A 16-Channel FET

Multiplexer Command Reference

Using This Chapter

This chapter describes Standard Commands for Programmable Instruments (SCPI) commands and summarizes IEEE 488.2 Common (*) Commands applicable to the 16-Channel FET and 16-Channel Thermocouple FET Multiplexer Modules. This chapter contains the following sections:

Command Types

Chapter 5

• Command Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 53

• SCPI Command Reference . . . . . . . . . . . . . . . . . . . . . . . . . . Page 55

• IEEE 488.2 Common Commands . . . . . . . . . . . . . . . . . . . . . Page 76

• Command Quick Reference. . . . . . . . . . . . . . . . . . . . . . . . . . Page 77

Common

Command Format

SCPI Command

Format

Comman ds are s eparat ed i nto two types: IEEE 488.2 Common C ommands and SCPI Co mmands.

The IEEE 488.2 standard defines the Co mmon Co mmands that perform functions lik e reset, self-t est , status byt e query, etc. Common Comman ds are three or four characters in length, always begin with the asterisk character (*), and may include one or mor e pa r a me ters. The comm a nd keyword is separated from the first parameter by a space character. Some examples of Common Commands are shown below:

*RST *ESR 32 *STB?

The S CPI commands perf`orm functions like closing switches, making measurements, q u erying instrument states or retrieving data. A subsystem command structure is a hierarchica l structure that usually consists of a top-lev el (or root) command, one or more l ower level commands, and their parameters. The following example shows part of a typical subsystem:

[ROUTe:]

CLOSe < SCAN <

channel_list>

:MODE VOLT

[ROUTe:] is the root command, CLOSe and SCAN are second-level

commands with <channel_list> as a parameter, and command with the parameter

Chapter 5 HP E1351A/53A 16-Channel FET Multiplexer Command Reference 53

VOLT.

MODE is a third-level

Command Separator A colon (:) al ways separates one command fr om the next lower level

command as shown below:

ROUTe:SCAN: MODE VO LT

Colons separate the root command from the second-level command

ROUTe:SCAN) and the second-level from the third-level (SCAN:MODE

(

). The parameters of a c omma nd a re separated from the command by

VOLT

a blank space.

Abbreviated

Commands

The command syntax shows most commands as a mixture of upper and lower cas e letters. The upp er case letters indicat e the ab br eviated spelli ng for the command. For shorter program lines, send the abbre v ia ted form. For better progra m r e adability, you may send the entire command. The instrument will accept either the abbreviated form or the entire command.

For example, if the c ommand s yntax shows

MEASURE are both acceptable forms. Other forms of MEASure, such as MEASU or MEASU R w ill ge ne r a te an error. You may use upper or lower

case letters. The refore ,

MEASURE, measure, and MeAsUrE are all

MEASure, then MEAS and

acceptable.

Comman d keywords can be entered in th eir full form , as shown above, or can be entered in their short form. In this manual, the entry required in short form commands is alwa ys capita lized. The short form is generally used for examples in this manual.

Implied Commands I mplied co mmands are those which appear in square brack ets ([ ]) in the

command syntax. (Note that the brackets are not part of the command and are not sent to the instrument.) Suppose you send a second level command but do not send the preceding implied command. In this case, the instru ment assu mes you intend to us e the implied c ommand and it res pon ds as if you had sent it. Examine this ex c erpt from the shown below:

[ROUTe:] subsystem

[ROUTe:]

SCAN <

channel_list>

:MODE < :MODE? :PORT <

mode>

port>

Both the root command [ ROUTe:] is an implied command. To set the instru ment’s scanning list, you can s end either of t he f ollowing command statements:

ROUTe:SCAN (@100:115) or SCAN (@100:115)

Note You must include a space between the keywords and any parameters.

54 HP E1351A/53A 16-Channel FET Multiplexer Command Reference Chapter 5

Parameters Parameter Types. The following table contains explanations and examples

of parameter t ypes you mi ght s ee lat er in this chapt er.

Parameter T ype Explanatio ns and Ex am pl es

Numeric Accepts all commonly used decimal representations of

numbers including opt ional signs, decimal poi nts, a nd scientific notation.

123, 123E2, -123, -1.23E2, .123, 1.23E-2, 1.23000E-01. Special cases include MIN, MAX, and DEF. MIN selects minimum value avai labl e, MA X selects m axi mum valu e available, and DEF select s default or reset value.

Boolean Represents a single binary condition that is either true or false.

1 or ON; 0 or OF F.

Discrete Selects from a finite num ber of val u es. Th e se paramet e r s

use mnemonics to represent each valid setting. An example is the TRIG ger:S OURc e <

source can be BUS, DBUS, EXT, HOLD, or IM M.

where

source> command

Optional Parameters. Parameters shown within square brackets ([ ]) are optional parameters. (Note that the brackets are not part of the command and are not sent to the instr ument.) If you do not specify a value for an optional parameter, the instrument chooses a default value. For example, consider the com man d wi thou t s pec ifyi ng a p arameter, th e present returned. If you send the minimum count available. If you send the

ARM:COUNt? [<MIN | MAX>] command. If you send the

ARM:COUNt valu e is

MIN parameter, the command returns the

MAX parameter, the command

returns the maximum count available. Be sure to place a space between the command and t he par ameter.

Linking Commands Linking IEEE 488.2 Common Commands with SCPI Commands.

Use a semic olon b etw een the commands. For e xa mple:

*RST;OUTP ON or TRIG:SOUR BUS;*T RG

Linking Mul tip le S CPI C ommands . Use both a s em icolon and a colon between the commands. For example:

ARM:COUN 1;:TRI G:SO UR EXT

SCPI Command Reference

This section describes the Standard Commands for Programmable Instru ments (SCPI) commands for the multip lex er modu les. Commands are listed alphabetically by subsyst em and also within each sub system.

Chapter 5 HP E1351A/53A 16-Channel FET Multiplexer Command Reference 55

ABORt

Subsystem Syntax ABORt

The ABORt su b system stops a scan in progress when the scan is enabled via the interface, and the trigger modes are

TRIGger:SOURce HOLD.

TRIGger:SOURce BUS or

Comments • ABORt Operation. Resets the trigger system and places triggers in

idle. The scan is st opped wit hout r es etting the scan conditions. The scan conditions stay in the curr ent c on figuration.

• Stopping Scans Enabled from Interface. When a scan is enabled

from the interface, use an interface E1301 front panel "Reset Instr" or "Clear Instr" key to stop the scan.

When the scan is enabled from the interface and the trigger source is

TRIGger:SOURce BUS or TRIGger:SOURce HOLD, u se ABORt or

the HP E1301 front panel "Reset Instr "or "Clear Instr "keys t o stop the scan.

CLEAR command or the HP

• Stopping Scans Enabled from Front Panel. When a scan is

enabled from the HP E1301 front panel execute interface or use the front panel "Reset Instr " or "Clear Instr" keys to stop the scan.

*RST over the

• Related Commands. ARM, INITiate:CONTinuous, [ROUTe:]SCAN,

TRIGger

Example Stopping a Scan with ABORt

TRIG:SOUR BUS Bus is trigger source . INIT:CONT ON Set contin uous sc ann ing . SCAN (@100:115) Sets channel list. INIT Starts scann ing cycle . . . . ABOR Aborts scan in progress.

56 HP E1351A/53A 16-Channel FET Multiplexer Command Reference Chapter 5

ARM

Subsystem Syntax ARM

The ARM subsystem selects the numb er of scanning cycles (1 - 32767) for

INIT command. This command does not app ly t o downloaded scan

each lists. For downloaded scan lists, use

:COUNt < :COUNt? [MIN | MAX]

number> MIN | MAX

INIT:CONT ON for multiple sca ns.

:COUNt ARM:COUNt <number> MIN | MAX allows scanning cycles to occur a

multiple of ti mes (1 to 32767) with on e

INITiate:CONTinuous OFF | 0 is set. MIN sets 1 scanning cycle and MAX

sets 32,767 sca nning cycles.

Parameters

Parameter Name Parameter Type Range of Values

INITia te command and when

number

Numeric 1 - 32767 | MIN | MAX

Comments • Number of Scans: Use only numeric valu es between 1 to 32767 f or

the number of scanning cycles (default is 1).

• Related Commands: ABORt, INITiate[:IMMediate]

• *RST Co ndition: ARM:COUNt 1

Example Settin g Ten Scann in g Cycles

ARM:COUN 10 Set 10 scanning cycles. SCAN (@100:115) Sets cha n ne l li st. INIT Starts scann ing cycle .

:COUNt? ARM:COUNt? [MIN | MAX] returns th e current numb er of scannin g cycles

ARM:COUNt. ARM:COUN? MIN returns 1 and ARM:COUN? MAX

set by returns 32767.

Parameters

Parameter Name Parameter Type Range of Values

MIN | MAX Numeric MIN = 1, MAX = 32767

Comme nt s • Related Commands: INITiate[:IMMediate]

Example Query Number of Scanning Cycles

ARM:COUN 10 Sets 10 scanning cycles. ARM COUN? Query number of sc ann ing cycle s;

returned value is 10.

Chapter 5 HP E1351A/53A 16-Channel FET Multiplexer Command Reference 57

DISPlay

Subsystem Syntax DISPlay

:MONitor:CARD DISPlay:MONitor:CARD <number | AUTO> selects the module in a

Parameters

The DISPlay subsystem monit ors t he channel state of a selected module (or card). This command can only be used when the FET multiplexer module is used in a switchbox configuration. It operates with mainframes that have a display, such as the HP 75000 Series B Mainframe (HP Model Number E1301). It also operates with terminals connected to the serial interface port.

:MONitor :CARD <

[:STAT e] <

switchbox to be monitored.

Parameter Name Parameter Type Range of Values

number | AUTO>

mode>

number | AUTO

Numeric 1 - 99

Comments • Selecting a Specific Module to be Monitored: Send the card

number in a switchbox with the

DISPlay:MONitor:CARD command.

• Selecting the Present Module to be Monitored: Use the

DISPlay:MONi tor :CARD AUT O command to select the last module

addressed by a switching command (e.g.,

[ROUTe:]CLOSe ).

• *RST Co ndition: DISPlay:MONitor:CARD AUTO

Example Select Module #2 in a Switchbox for Monitoring

DISP:MON:CARD 2 Se le c ts module #2 in a switchbox.

58 HP E1351A/53A 16-Channel FET Multiplexer Command Reference Chapter 5

:MONitor[:STATe ] DISPlay:MONitor[:STATe] <mode> turns the monitor mode on or off.

Parameters

Parameter Name Parameter Type Range of Values

mode

Boolean 0 | 1 | ON | OFF

Comme nt s • Moni toring Switchbo x Chann els : DIS Play: MO Ni tor [:ST AT e] ON

or DISPlay:MONitor[:STATe] 1 turns the monitor mode o n to show the channel state of the selected module.

OFF

or DISPlay:M ONitor[:STATe] 0 turns the monitor mo de o ff.

DISPlay:MO Ni tor[:STATe]

• Selecting the Module to be Monitored: Use the DISPlay

MONitor:CARD <

number> | AUTO command to select the module.

• Monitor Mode on an HP 1301 Mainframe Display: The

following three examples show the types of display you will get:

Chan: _ No channe ls c lose d on this card. Chan: 12 Channel 12 closed. Chan: 9,1 4-wire ohms set-u p with volt age on

channel 9.

• *RST Co ndition: DI SPlay: MO Ni t or[: ST AT e] OFF | 0

Example Enabling the Monitor Mode

DISP:MON:CARD 2 Se le c ts module #2 in a switchbox. DISP:MON 1 Turns the monitor mode on.

Chapter 5 HP E1351A/53A 16-Channel FET Multiplexer Command Reference 59

INITiate

Subsystem Syntax INITiate

:CONTinuous INITiate:CONTinuous <mode> enables or disables continuous scanning

Parameters

The INITiate subsystem selects continuous sca nning cycles and starts the scannin g cycle.

:CONTinuous < :CONTinuous? [:IMMediat e]

cycles for the switchbox or scanning voltmeter.

Parameter Name Parameter Type Range of Values

mode>

mode

Boolean 0 | 1 | ON | OFF

Comme nt s • Continuous Scanning Operation: Continuous scanning is enabled

with the command. Sending the INITiat e[:IMMediat e] command closes the first channel in the channel list. Each trigger from a trigger source specified by the through the channel list. A trigger at th e end of the channel list closes the first channel in the chann el list and the scan cycle repeats. Continuous scan ning can be stoppe d by the non-downloaded scans, and by a system reset or a power off for downloaded sca n list s.

INITiate:CONTinuous ON or INITiate:CONTinuous 1

TRIGger:SOURce command advances the scan

ABORt command for

• Scanning a Set Number of Cycles: The INITiate:CONTinuous OFF

or INITiate:CONTinuous 0 command goes through the scan list the number of times specified by the

INITiate[:IMMediate] command closes the first channel in the

the channel list. Each trigger from a trigger source selected by the

TRIGger:SOURce command advances the scan through the channel

list. A trigger at the end of the channel lis t op ens the last channel in the channel list, and if the number of cycles has not reached the

ARM:COUNt parameter, returns to the beginning of the scan list and

closes the first channel. When the nu mber of cycles equals the

ARM:COUNt parameter, the scanning cycle stops. Note that ARM:COUNt does not apply to downloaded scan lists.

ARM:COUNt command. Sending

• Stopping Continuous Scans: Continuous scanning can be stopped

ABORt command for non-downloaded scans, and by a system

by the reset or a power off for downloaded scan lists.

• Related Commands: ABORt, ARM:COUNt, *RST, TRIGger ,

TRIGger:SOURce

• *RST Co ndit ion: INITiate:CONTinuous OFF

60 HP E1351A/53A 16-Channel FET Multiplexer Command Reference Chapter 5

Example Enabling Continuous Scans

INIT:CONT ON Enables continuous scanning. SCAN (@100:115) Sets cha n ne l li st. INIT Starts scann ing cycle .

:CONTinuous? INITiate:CONT i nu o u s? queries the scanning state. With continuous

scannin g enabled, the c omma nd r e turns 1 (ON). With continuous scanning disabled, the command returns 0 (OFF).

Example Query Co nt in uous Scanning Sta te

INIT:CONT ON Enables continuous scanning. INIT:CONT? Query continuous scanning state.

[:IMMediate] INITiate[:IMMediate] star ts t he sca nning cycle and closes the f irst c hannel

in the channel list. Successive triggers from the source specified by the

TRIGger:SOURce command advances the scan through the channel list.

Comments • Starting the Scanning Cycle: The INITiate[:IMMediate] command

starts scanni ng b y closing the first channel in the cha nnel lis t. Each trigger rec eived adva nces the scan to the next c hannel in the channel list. An invalid channel list generates an error (see the

[ROUTe:]SCAN c ommand).

• Stopping Scanning Cycles: See the ABORt command.

Example Enabling a Single Scan

SCAN (@100:115) Sets cha n ne l li st. INIT Starts scann ing cycle .

Chapter 5 HP E1351A/53A 16-Channel FET Multiplexer Command Reference 61

OUTPut

Subsystem Syntax OUTPut

The OUTPut subsystem enab les or disables the "Trig Out" port of the HP E1300/E1301 Mainframe.

[:STAT e] < [:STATe]?

state>

[:STATe] OUTPut [:STAT e] <state> enables/disables the "Trig Out" port on the rear

OUTPut [: ST AT e] ON | 1 enables

Parameters

panel of the HP E1300/E1301 Mainframe. the port and

Parameter Name Parameter Type Range of Values

OUTPut[:STATe] OFF | 0 disables the po r t.

state

Boolean 0 | 1 | ON | OFF

Comme nt s • Downloaded Scans: The OUTPut subsystem does not work with

downloaded scan lists. The scan list is downloaded automatically if you use only).

TRIG:SOUR DBUS or TRIG:SOUR IMM (FET multiplexers

OUTPut works with all other scanning methods.

• Enabling "Trig Out" Port: When enabled, the "Trig Out" port is

pulsed each time a channel is closed during scanning. When disabled, the "Trig Out" port is not pulsed.

• Output Pulse: The pulse is a +5 V negative-going pulse.

• "Trig Out" Port Reserved by Switchboxes: The "Trig Out"

resource is a system resource, and can only be reserved by one instrume nt at a time .

• Related Commands: [ROUTe:]SCAN, TRIGger:SOURce

• *RST Co ndition: OUTPut[:STATe] OFF (port disabled)

Example Enablin g "T r ig O ut" Po r t

OUTP ON Enables "Trig Out" port f or pul se

output.

[:STATe]? OUTPut[:ST A Te]? queries the present state of th e "Trig Out" port. The

command returns 1 if the port is enabled, or 0 if disabled.

Example Query "Trig Out" Port State

OUTP ON Enables "Trig Out" port f or pul se

output.

OUTP :STAT? Query port enable state.

62 HP E1351A/53A 16-Channel FET Multiplexer Command Reference Chapter 5

[ROUTe:]

Subsystem Syntax [ROUTe:]

The [ROUTe:] subsystem controls switching and scanning operations for the multiplexer modules in a switchbox.

CLOSe < CLOSe? < OPEN < OPEN? < SCAN <

SETTling [:TIME] <

channel_list>

channel list>

channel_list>

:MODE < :MODE? :PORT < :PORT?

mode>

port>

time>, <channel_list>

[:TIME]? [M IN | MAX] <

channel_list>

CLOSe [ROUTe:]CLOSe <channel_list> closes multiplexer channels specified in the

channel list. The chan nel _l ist fo r circumstances, (@ccnn,ccnn), where cc = card number (00-99) and nn = channel number (00-1 5). Be fore u sin g the

SCAN:M O D E and SCAN:PORT, as these commands determine what switches

will be closed for a given channel. You can only have one closed channel on a card at a time. If you want to close a channel on two different cards in the same VXIbus instrument (for example, 102,208) you can use (@ccn n,ccnn).

CLOSe is in the form (@ccnn), or in special

CLOSe command, you must specify the

Parameters

Parameter Name Parameter Type Range of Values

channel_list

Numeric cc00 - cc15

Comme nt s • Specify SCAN:MODE and SCAN:PORT: Before using the CLOSe

command, specify the SCAN:MOD E and SCAN:PORT.

• Closing Channels: To c lose:

– use [ROUTe:]CLOSe (@ ccnn) for a single channel; – use [ROUTe:]CLOSe (@ccnn, ccnn) for single channels on

different cards;

– use [ROUTe:]CLOSe (@ccnn, ccnn) f or multiple channels; – use [ROUTe:]CLOSe (@ccnn: ccnn) for sequential channels; – use [ROUTe:]CLOSe (@ccnn: ccnn, ccnn: ccnn) for a group of

sequ ential channels;

– or any combination.

Closure order for multiple channels with a single command is not guaranteed.

• Related Commands: [ROUTe:]OPEN, [ROUTe:]CLOS e?,

[ROUTe:]SCAN:MODE, [ROUTe:]SCAN:PORT

• *RST Co ndition: All multiplexer channels are open.

Chapter 5 HP E1351A/53A 16-Channel FET Multiplexer Command Reference 63

Example Closing Mul tiplexer Chann els

Thi s examp le closes c hanne l 0 0 o f a multip lex er mo du le card n umber 1 an d channel 15 of multiplexer module card number 2 in a single switchbox.

SCAN:MODE VOLT SCAN:PORT ABUS CLOS (@100,215) 100 closes channe l 00 of card #1;

215 closes cha nne l 15 of card #2.

CLOSe? [ROUTe:]CLOSe? <channel_list> returns the current state of the

channel(s) qu eried. The channel list is in the form (@ccnn). The command returns 1 if channels are closed and returns 0 if the channels are open.

Comments • Que r y is Sof tware Readback: The [ROUTe:]CLOSe? command

returns the current software state of the channel specified. It does not account for relay hardware failures.

Example Que ry M ul tiplexer Channel Closure

CLOS (@100,215) 100 closes channe l 00 of card #1;

215 closes cha nne l 15 of card #2.

CLOS? (@215) Query channel 215.

OPEN [ROUTe:]OPEN <channel_list> opens the multiplexer channels specified

in the channel_list. The channel_list is in the form (@ccnn), (@ccnn,ccnn), (@ccnn:ccnn) or (@ccnn:ccnn,ccnn:ccnn) where cc = card number (00-99) and nn = channel nu mber (00-15).

Parameters

Parameter Name Parameter Type Range of Values

channel_list

Comme nt s • Opening Channels: To open:

– use [ROUTe:]OPEN (@ccnn) for a single channel; – use [ROUTe:]OPEN (@ccnn, ccnn) for multiple channels; – use [ROUTe:]OPEN (@ccnn: ccnn) for sequential channels; – use [ROUTe:]OPEN (@ccnn: ccnn, ccnn:ccnn) f or a group of

sequ ential channels;

– or any combination.

Opening order for multiple channels with a single command is not guaranteed.

• Open Channels: Opening an already open channel has no eff ect.

Numeric cc00 - cc15

• Related Commands: [ROUTe:]CLOSe, [ROUTe:]O PEN?

• *RST Co ndition: All multiplexer channels are open.

64 HP E1351A/53A 16-Channel FET Multiplexer Command Reference Chapter 5

Example Opening Multiplexer Channels

This example opens channel 00 of a multiplexer module card number 1 and channel 15 of multiplexer module card number 2 in a single switchbox.

OPEN (@100,215) 100 opens ch anne l 00 of card #1;

215 opens channe l 15 of card #2.

OPEN? [ROUTe:]O PEN? <channel_list> returns the current state of the channel(s)

queried. The channel list is in the form (@ccnn). The command returns 1 if the channel is open or returns 0 if the channel is closed.

Comments • Que r y is Sof tware Readback: The [ROUTe:]OPEN? command

returns the current software state of the channel(s) sp ecifi ed. It does not account for relay hardware failures.

Example Que ry M ul tiplexer Channel Open State

OPEN (@100,215) 100 opens ch anne l 00 of card #1;

215 opens channe l 15 of card #2.

OPEN? (@215) Query state of channel 215.

SCAN [ROUTe:]SCAN <channel_list> defines the channels to be scanned. The

channel_list has the form (@ccnn), (@ccnn,ccnn), (@ccnn:ccnn) or (@ccnn:ccnn,ccnn:ccnn) where cc = card number (00-99) and nn = channel number (00-15).

Parameters

Parameter Name Parameter Type Range of Values

channel_list

Numeric cc00 - cc15

Comme nt s • Channel List: Valid cha nnel lis ts ar e:

– a single channel, use (@ccnn); – for multiple channels, use (@ccnn,ccnn); – sequential channels, us e (@ccnn:ccnn); – a group of sequential channels, use (@ccnn:ccnn,ccnn:ccnn); – or any combination.

• Defining the Channel List. When executing [ROUTe:]SCAN, the

channel list is checked for valid card and channel numbers. An error is generated for an invalid channel list.

• Downloading a Scanni ng List: The channel_list is automatically

downloaded int o RAM on the FET multiple xer modules for

TRIG:SOUR DBUS and TRIG:SOUR IMM trigger modes. The

complete list is downloaded onto each module in an instrument. The channels are adva nced with no direct i nt ervention by the mainframe CPU during the scan. If an instrument contains mixed modules (FET and Relay Mu ltiplexers), the scan lis t w ill not be downloaded.

Chapter 5 HP E1351A/53A 16-Channel FET Multiplexer Command Reference 65

• Scanning Operation: With a valid channel list,

INITiate[:IMMediate] starts the scanning cycle and closes the first

channel in t he channel list. Successive triggers from the source specified by

TRIGger:SOURce advances the scan through the

channel list.

• Stopping Scan: See the ABORt command.

• Related Commands: TRIGger, TRIGger :SOURce

• *RST Co ndition: All multiplexers channels are open.

Example Scanning Using External Instruments

The following example shows how to scan channels us ing the HP E1300A/ E1301A Mainframe via HP-IB and an HP 3457A Digital Multimeter. This exampl e uses the mainfr ame’s "Trig Out" port to sy nc hronize the multiplexer module in a switchbox to the multimeter. The trigger pulse from the port triggers the multimeter for a measurement. See Chapters 2 and 3 for typica l user connect ions to the multiplexer.

The co mputer used in the example is an HP Serie s 200/300 wit h HP BASIC as the program language. The computer interfaces with the mainframe over HP-IB. Assumed is an HP-IB select code of 7, an HP-IB primary address of 09 and 22 for the HP E1300A/E1301A Mainframe and HP 3457A Multimeter, respectively, and an HP-IB secondary address of 14 for the switchbox.

10 OUTPUT 722;"TRI G E XT;DCV" !Sets multimeter to external trigger

and to measure dc volts

20 OUTPUT 70914;"O UT P ON" !Enables "Trig Out" port 30 OUTPUT 70914;"TRI G:SO UR BUS" !Sets switchbox to receive bu s

trigger s

40 OUTPUT 70914;"SCAN:MO DE VOLT "! Sets switchbox to measure

voltage during scann ing

50 OUTPUT 70914; "SCAN:PO RT ABUS"!Sets switchbox to close the

appropriate tree s witches during scanning

60 OUTPUT 70914;"SCAN (@100:115)"!Selects the channel list 70 OUTPUT 70914;"INIT" !Starts scanning cycle 80 FOR I = 1 TO 16 !Start count loop 90 ENTER 722;A !Ent er reading into vari abl e A 100 PRINT A !Print reading in variable A 110 TRIGGER 70914 !Trigger the s witchbox to advance

the channel list

120 NEXT I !Inc r ement count 130 END

66 HP E1351A/53A 16-Channel FET Multiplexer Command Reference Chapter 5

SCAN:MODE [ROUTe:]SCAN:MODE <mode> sets the multiplexer channels defined by

[ROUTe:] SCAN <ch annel_ list > command for None, Volts, 2-Wire

the Ohms, or 4-Wire Ohms measurements.

Parameters

Parameter Name Parameter Type Range of Values

mode

Discrete NONE | VOLT | RES | FRES

Comme nts • Order of Command Execution: The [ROUTe:]SCAN:MODE

command must be executed before the [ROUTe:]SCAN < channel_list> and [ROUTe:]CLOSe <channel_list> comma nds.

• NONE and VOLT Mode Description: When sele cte d , channel list

is set up for volts measurements.

• RES Mode Description: When s elected, chan nel list is set up f or

2-wire o hms meas ur em e nts. The current s ource on I+ and I- is superimposed on the channel being measured. Appropriate tree isolation switches are automatically closed.

• FRES Mode Description: When selected, channel list is set up for

4-wire ohms measurements. Specify only the channel on which the voltage is to be measur e d. The pair e d channel (plus or minus eight channels away) on the other bank will automatically close. If you specify both channels (@102, 110), the module will first setup for

FRES reading on 02, then setup for FRES reading o n 10.

• *RST Co ndition: [ROUTe:]SCAN:MODE NONE

Example Selecting the 4-Wire Ohms Mode. This example scans 8 channels for

4-wire ohms resistanc e measurements.

TRIG:S OUR E XT Selects ex te rnal trigger source. SCAN:MODE FRES Selects the 4-wire ohms scanning

mode.

SCAN (@100:115) Sets cha n ne l li st. INIT Starts scann ing cycle .

SCAN:MODE? [ROUTe:]SCAN:MODE? returns the current state of the scan mode. The

command retur n s

NONE, VOLT, RES, or FRES mode, respectively.

Example Query Scan Mode

This example selects the 4-wire ohms measurement mode ( queries the measur eme nt stat e. Becaus e 4- wire oh ms mode is select ed, the query command r et urns

SCAN:MODE FRES Selects the 4-wire ohms scanning

SCAN:MODE? Query the scanning mode.

Chapter 5 HP E1351A/53A 16-Channel FET Multiplexer Command Reference 67

NONE, VOLT, RES, or FRES i f the scan mode is in the

FRES), then

FRES.

mode.

SCAN:PORT [ROUTe:]SCAN:PORT <port> enables/disables the tree isolation switches.

SCAN:PORT ABUS closes the appropriate tree switches (for analog bus

connections). The switches and leaves them open. With channels can only be measured through the respective bank direct terminals.

Parameters

Parameter Name Parameter Type Range of Values

[ROUTe:]SCAN:PORT NONE c omma nd disables the tree

SCAN:PORT NONE the closed

port

Discrete ABUS | NONE

Comments • Order of Command Execution: The [ROUTe:]SCAN:PORT

command must be executed before the [ROUTe:]SCAN < channel_list> and [ROUTe:]CLOSe <channel_list> comma nds.

• *RST Co ndition: [ROUTe:]SCAN:PORT NONE

Example Selecting the ABUS Port

TRIG:S OUR E XT Selects ex te rnal trigger source. SCAN:MODE FRES Selects the 4-wire ohms scanning

mode.

SCAN:PORT ABUS Selects the anal og bus po rt. SCAN (@100:107) Sets cha n ne l li st. INIT Starts scann ing cycle .

SCAN:PORT? [ROUTe:]SCAN:PORT? returns the current state of t he ana log bus port.

The co mman d returns disabled or

ABUS if the control relays are enabled.

Example Query Scan Port

NONE if the analog bus connection control relays are

This example selects the analog bus port, then queries the state. Because the analog bus port is selected, t he query command returns

SCAN:PORT ABUS Selects the analog bus port. SCAN:PORT? Query the port selection.

ABUS.

68 HP E1351A/53A 16-Channel FET Multiplexer Command Reference Chapter 5

SETTling[:TIME] [ROUTe:]SETTling[:T IM E] <channel_list> sets the delay between receipt

of a channel closing trigger, and the pulse when the FET channel is closed. You must sp ec if y one and only one channel for each card in the instrument which has a channel in the channel list, and the channels on the card. The range is 1 to 32768

Parameters

Parameter Name Parameter Type Range of Values

<time> will then apply to all

µsec.

time

channel_list

Numeric 1E-6 | 32768E-6 | MIN | MAX Numeric o nly one channel

Comme nt s • Digital Bus Handshaking: This command allows a user-defined

settling time to allow a measurement to be made before the next channel is closed.

• Related Commands: TRIGger:SOURce DBUS, TRIGger:SOURce

IMMediate

Example Settin g 16 µsec SETTling TI ME

TRIGger:SOUR DBUS Triggering on the digital bus

handshake li ne s

SETTling:TIME 16E-6 Delay = l6µsec

SETTling[:TIME]? [ROUTe:]SE TTling[:TIM E]? [MIN | MAX] <channel_list> returns the

current setting for a specified channel. and maximum allowable settings.

Parameters

MIN or MAX returns the minimum

Parameter Name Parameter Type Range of Values

MIN | MAX Numeric MIN = 1 µsec, MAX = 32768 µsec

channel_list

Numeric o nly one channel

Comme nt s • Returned value is given in exponential notation.

Example Set and Query the SETTling TIME

SETT:TIME 16E-6 Sets del ay = 16µsec. SETT:TIME? Returns + 1.600000E-0 05.

Chapter 5 HP E1351A/53A 16-Channel FET Multiplexer Command Reference 69

STATus

The STATus subsyst em reports the bit valu es of the Op eration Status Register. This enables the Status Register to set a bit after a bit is set to 1 by the Op eration Status Register.

Subsystem Syntax STATus

:OPERation

:ENABle < [:EVENt]?

:OPERation:ENABle STATus:OPERation :E N ABle <number> enables the Operation Status

Registe r to set a bit in the Status Register. For multiplexer modules, when bit 8 in the Operation Status Register is set to 1, bit 7 in the Status Register is set to 1.

Parameters

Parameter Name Parameter Type Range of Values

number>

number

Nume ric 1 - 327 68

Comme nts • Setting Bit 7 of the Status Register: STATus:OPERation:ENABle

256

sets bit 7 of the Status Register to 1 a fter bit 8 of the Op eration

Status Register is set to 1.

• Disabling STATus:OPERation: The STATus:PRESet command

disables the

STATu s:OPERation:ENABle command.

• Related Commands: [ROUTe:]SCAN, *SRE, *STB?, *SPOLL,

STATus:PRESet

Example Enable the Status Register Bit 7

STAT:OPER:ENAB 256 Enabl e s bit 7 of the St at us Re gi ste r.

:OPERation[:EVENt]? STATus: OP ERation [:EVENt ]? returns th e bit value of the Operation

Status Register (only bit 8 is used by the multiplexer modules).

Comments • Setting Bit 8 of the Operation Status Register: Bit 8 (Scan

Complete) is set to 1 after a scanning cycle completes. Bit 8 returns to 0 after sending the correct operation set to 0 by

• Returned Data after sending the STATus:O PERat ion [:EV ENt]?

Command: The command returns +256 if bit 8 of the Operation Status Register is set to 1. The command returns +0 if bit 8 of the Operat ion Sta tus R egister is set to 0.

STATus:OPERation[:EVENt]? command. For

*CLS before scanning.

• Related Commands: [ROUTe:]SCAN, *SRE, *STB?, *SPOLL

Example Reading the Operation Status Register after a Scanning Cycle

STAT:OPER ? Reads the regist er val ue read and print the register value +256 shows bit 8 is set to 1; +0

shows bit 8 is set to 0.

70 HP E1351A/53A 16-Channel FET Multiplexer Command Reference Chapter 5

SYSTem

Subsystem Syntax SYSTem

:CDEScription? SYSTem:CDEScription? <number> returns the descriptio n of a select ed

Parameters

The SYSTem subsystem returns the error numbers and error messa g es in the error queue of a switchbox, and returns the types and descriptions of modules (car ds) in a switchb ox.

:CDEScription? :CPON :CTYPe? :ERRor?

module (card) in a switchbox.

Parameter Name Parameter Type Range of Values

number | ALL>

number

Numeric 1 - 99

Comments • 16-Channel FET Multiplexer Module Description: The

SYSTem:CDEScription? <number> command returns:

16 Channel FET Mux

• 16-Channel Thermocouple FET Multiplexer Module Description:

SYSTem:CDEScription? <number > command returns:

The

16 Channel FET Mux with T/C

Example Reading the Description of Card #1 Module

SYST:CDES? 1 Determine the descri ption.

:CPON SYSTem:CPON <number | ALL> opens all channels of a selected modu le,

or all modules (cards) in a switchbox.

Parameters

Parameter Name Parameter Type Range of Values

number

Numeric 1 - 99 | ALL

Comments • Differences between *RST and CPON: SYSTem:CPON only opens

all channels of a sel ected modu l e or all modules in a switch b ox.

*RST opens all channels of all modules in a switchbox and also sets

the trigger modes to the power-on states.

Example Opening All Channels on Card #1

SYST:CPON 1 Opens all chann els on c ard #1.

Chapter 5 HP E1351A/53A 16-Channel FET Multiplexer Command Reference 71

:CTYPe? SYSTem:CTYPe? <number> returns the module (card) type of a selected

module in a switchbox.

Parameters

Parameter Name Parameter Type Range of Values

number

Numeric 1 - 99

Comments • 16-Channel FET Multiplexer Module Model Number:

SYSTem:CTYPe? < number> command returns :

The

HEWLETT-PACKARD,E1351A,0,A.03.00

• 16-Channel Thermocouple FET Multiplexer Module Model Number:

SYSTem:CTYPe? < number> command returns :

The

HEWLETT-PACKARD,E1353A,0,A.03.00

Note: T he first number a fter the mod el number is the seri al number of the module (always 0); the module revision c ode f ollo ws the serial numb er (f or exa mple, A.03.00).

Example Reading the Model Number of a Card #1 Module

SYST:CTYP? 1 Determine the model number.

:ERRor? SYSTem:ERRor? returns the error numbers and corresponding error

messages in the error queue of a switchbox. See Appendix C for a listing of the switchbox error numbers and messa ges.

Comme nts • Error Numbers/Messages in the Error Queue: Errors generated

by a switchbox stores an error number and corresponding error message in the error queue. Each error message can be up to 255 characters long.

• Clearing the Error Queue: An error number/message is removed

from the queue each time the The errors are cleared first-in, first-out. When the queue is empty, each following To c le ar all e rr or numbers/messages in the queue, execute the command.

SYSTem:ERRor? command returns 0, "No error".

SYSTem:ERRor? command is sent.

*CLS

• Maximum Error Numbers/Messages in the Error Queue: The

queu e hol ds a max imum of 30 error numbers/messa g es for each switch box. If the queue over flows, t he last error number/message in the queue is replaced by -350, "Too many errors". The least recent error numb ers/messages remain in the qu eu e and the most r ecent are discarded.

Example Reading the Error Queue

SYST:ERR? Query the error queue.

72 HP E1351A/53A 16-Channel FET Multiplexer Command Reference Chapter 5

TRIGger

Subsystem Syntax TRIGger

[:IMMediate] TRIGger[:IMMediate] caus es a trigger to occur when the defined trigger

The TRIGger subsyst em c omma nds control the scan triggering operation of the multip le xer modul es.

[:IMMediat e] :SOURce BUS | DBUS | EXTernal | HOLD | IMMediate :SOURce?

source is

TRIGger[:IMM] is not the same as TRI Gger:SOURce IM M.

TRIGger:SOURce HOLD or TRIGger:SOURce BUS. Note that

Comments • Executing the TRIGger[:IMMediate] Command: A channel lis t

must be defi ned wit h the and an

TRIGger[:I MM ediate] can trigger the switch box.

INITiate[:IMMediate] command must be executed b efore

[ROUTe:]SCAN <channel_list> command

• HOLD or BUS Source Remains: If selected, the TRIGger:SOURce

HOLD

or TRIGger:SO URce BUS c ommands re main in effect after

triggering the switchbox with the

TRIGger[:IMMediate] command.

• Related Commands: INITiate, [ROUTe:]SCAN

Example Advancing Sc an using the TRIGger Command

TRIG:SOUR HO LD Sets t rigg er sou rce to hold . SCAN (@100:115) Sets cha n ne l li st. INIT Starts scann ing cycle . loop statement Start coun t lo op. TRIG Advance s scan to next chann el. increment l oo p Increme nt count loop.

Chapter 5 HP E1351A/53A 16-Channel FET Multiplexer Command Reference 73

:SOURce TRIGger:SOURce BUS | DBUS | EXTern al | HOLD | IMMediate specifies

the trigg er sourc e to advance the channel list dur ing s canning.

Parameters

Parameter Name Parameter Type Range of Values

BUS Discrete *TRG command

DBUS Discrete Digital Bus

EXTernal Discrete Event In port

HOLD Discrete Hold Triggering

IMMediate Discrete Continuous Triggering

Comme nt s • Enabling the Trigger Source: The TRIGger:SOURce command

only selects t he trigger s ource. The enables the trigger source.

• Using the TRIG Command: You can use TRIGger[:IMMediate] to

advance the scan when

HOLD

is selected.

TRIGger:SOURce BUS or TRIG ger:S OURce

• Using Digital Bus Trigger: TRIGger:SOURce DBUS selects the

digital bus on the multiplexer as the trigger. Any open collector TTL trigger source can be wired to the "Channel Advance" lead. A negative-going pulse triggers t he multiplexer and advances it to the next channel on the scanning list. After the the multiple xer asserts "Channel Closed" on th e digital bu s.

INITiate[: IMMediate] command

SETTling:TIME delay,

• Using External Trigger Inputs: With TRIGger:SOURce EXTernal

selected, only one switchbox at a time can use the external trigger input at the HP E1300A/E1301A Mainframe’s "Event In" port. The trigger input is assigned to the first switchbox requesting the external trigger source.

• Assigning External Trigger: A switchbox assigned with

TRIG:S OUR E XT remains assigned to that source until the switchbox

receives a command to change the source. When the source is changed, t he external trigger sourc e is available to another switchbox (with a

TRIGger:SOURce EXTernal command). Another switchbox

cannot receive an external trigger source if the source is already assigned, or an error is generated.

• Using Bus Triggers: To trigger the switchbox with

TRIGger:SOURce BUS selected, use TRIGger[ :I MM edi ate] , the IEEE

488.2 common command

GET).

(

*TRG or the HP-IB Group Execute Trigger

• "Trig Out" Port Shared by Switchboxes: See the OUTPut

command.

• Related Commands: ABORt, [ROUTe:]SCAN, SETTling[:TIME],

TRIGger

• *RST Co ndition: TRIG ger: SOURce IM Medi ate

74 HP E1351A/53A 16-Channel FET Multiplexer Command Reference Chapter 5

Example Scanning Using External Triggers

In the following example, the trigger input is applied to the HP E1300A/E130 1A Main frame’s "E v ent In" port.

TRIG:S OUR E XT Sets trigger source to externa l. SCAN (@100:115) Sets cha n ne l li st. INIT Starts scann ing cycle . trigger externally Advance s scan to next chann el.

Scanning Using Bus Triggers

TRIG:SOUR BUS Sets interface (bu s ) trigge r i ng. SCAN (@100:115) Sets cha n ne l li st. INIT Starts scann ing cycle . *TRG Advanc e s cha nne l list .

:SOURce? TRIGger:SOURce? returns the current trigger source for the switchbox.

Command returns either sources

BUS, DBUS, EXTernal, HOLD, or IMMedi at e, respecti ve ly.

Example Query Trigger Source

BUS, DBUS, EXT, HOLD, or IMM for trigger

TRIG:S OUR E XT Sets trigger source to externa l. TRIG:SOUR? Query trigger source; returns

"EXT".

Chapter 5 HP E1351A/53A 16-Channel FET Multiplexer Command Reference 75

IEEE 488.2 Common Commands

The following table lists the IEEE 488.2 C ommon (*) Commands that the 16-Channel FET Multiplexer Modules accept. The operation of some of these commands is described in Chapter 4 of this manual. For more information on Com mon C om ma nds , re fer t o the H P 75000 Series B

Mainframe User’s Manual (HP Model Number E1300/E1301) or the ANSI/IEEE Standa rd 488 .2-1 987.

Command Title Description

*IDN? Identification Returns identificati o n st ring of the s witchbox . *RST Reset

*TST? Self-Test Power-on interrupt returns +110

*OPC *OPC?

*WAI Wai t to Complete See note below. *CLS Clear status Clears all status registers (see STATus:OPERation[:EVENt]?). *ESE

*ESE? *ESR? Event status register query See note below. *SRE

*SRE? *STB? Read statu s byte query See note below. *TRG Trigger Triggers the switchbox to advance the scan when scan is enabled

*RCL Recall instrument state See note below.

Operation Compl et e Operation Complet e Query

Event status enable Event status enable query

Service request enable Service request enable query

Opens all channels, and invalidates current channel list for scanning. Sets ARM : C O UN 1 , TR I G : SO U R I M M, and INIT:CONT OFF.

Incorrect MFR ID or model code returns +103 Test pass returns 0.

See note below. See note below.

Enables status register bits (see Chapter 4 for operation). See note below.

and trigger source is TRIGger:SOURce BUS | HOLD.

*SAV Store instrument state See note below.

Note: These comma nds ap ply to many inst rumen ts and ar e not docu ment ed in d etail here. S ee the HP 75000

Series B E1300/E 13 01 Mainframe User’ s Manu al

or the ANSI/IEEE Standar d 488 .2-19 87 f or more in format ion.

76 HP E1351A/53A 16-Channel FET Multiplexer Command Reference Chapter 5

Command Quick Reference

The following tab les su mm arize SCPI and IEEE 488.2 C ommon (*) Commands for the 16-Channel FET Multiplexer Modules.

SCPI Commands Quick Referenc e

Command Description

ABORt Abort a sc a n in pr og r es s. ARM :COUNt <

:COUNt? [MIN | MAX]

DISPlay :MONitor:CARD <

:MONitor[:STATe] <

INITiate :CONTinuou s <

:CONTinuou s? [:IMMediate]

OUTPut [:STATe] <

[:STATe]?

[ROUT e : ] CLOSe <

CLOSe? < OPEN < OPEN? < SCAN < SCAN:MODE NONE | VOLT | RES | FRES SCAN:MODE? SCAN:PORT NONE | ABUS

SCAN:PORT? SETTling[:TI ME] < SETTling[:TIME]? [MIN | MAX] <

STATus :OPERation:ENABle

:OPERation[:EVENt]?

SYSTem :CDEScription? <

:CPON < :CTYPe? < :ERRor?

number> MIN | MA X

number> | AUTO

mode>

state>

channe l _l ist>

channel _list>

number>

number> | ALL

number>

mode>

channe l_list>

channel_list>

Multiple scans p er INIT command. Query number of scans.

Selects module to be monitored. Selects monitor mode.

Enables/ di sa ble s contin u ous sc anni ng . Query mode . Starts a scanni ng cyc le.

Enables/ di sa bl es "Tri g Out " pul s e. Query state of trig out pulse.

Close channel(s). Query channel(s) closed. Open chann el(s). Query channel(s) opened. Define channels for scanning.

Selects appropriate tree Isolation swit ches for measu remen ts. Query state of scan mode. Enables tr e e isolation swi tch es closure as par t of a measurement . Que ry ana l og bus stat e. Sets delay between trigger pulse and channel closed pulse. Returns current parameter in SETTling[:TIME].

Enables the Operation Status Register to set a bit in th e Status Regist er. Returns status of Operation Status Register.

Returns description of module in a switchbox. Sets specified module to its pow er-on state. Returns the module type. Returns error number/message in a switchbox error queue.

TRIGger [:IMMediate]

:SOURce BUS :SOURce DBUS :SOURce EXTernal :SOURce HOLD :SOURce IMMediate :SOURce?

Causes a trigger to occur. Trigger source is *TRG . Trigger source is Digi tal Bus. Trigger source is "Event In" port. Hold off triggering. Continuous (internal) triggers. Query scan trig g er sourc e.

IEEE 488.2 Common Comman ds Quick Referen c e

Comm a n d Title Descriptio n

*RST Reset Opens all chann els and invali dat es current chan n el list for scannin g.

*TRG Bus Tri gg er When scan is enabled and trigger sou rce is TRI G: SOUR BUS, us e the *TRG

*TST? S elf-Test Power on interrupt returns + 110.

Sets ARM:COUN 1, TRIG:SOUR IMM, and INIT:CONT OFF.

command to trigger t he switchbox to advance the scan.

Incorrect MFR ID or model code returns +103. Test p a ss returns 0.

Chapter 5 HP E1351A/53A 16-Channel FET Multiplexer Command Reference 77

Notes

78 HP E1351A/53A 16-Channel FET Multiplexer Command Reference Chapter 5

Appendix A

HP E1351A/53A FET Multiplexer

Specifications

Maximum Voltage:

Terminal to Chassis: ±16V peak* (input impedance less above 14V peak)

Maximum Current per Channel:

1 mA (non-inductive)

Maxi mum Offset Voltage:

25 µV (0° to 28°C) 250 µV (28° to 55°C)

Input Impedance: Power On (Vin <±10V)

High to Low: >10 High or Low to Chassis: >10 Guard to Chass is: 10 kΩ ±10%

Capacitance:

High or Low to Chassis: <200pf High to Low: <200pf

Power Off (High to Low):

for Vi n ≤1 4V: 1000Ω for Vi n >14V: 220Ω

Ω

Screw Terminal Wire Size:

16 AWG Max, 26 AWG Min

Module Size/Device Type:

B, register-ba sed

Connectors Used: P1

Number of Slots: 1

Interrupt Level: selectable

Power Requirements:

Voltage: +5V +12V Peak module current, IPM (A): 0.20 0.13 Dyna mic modu le current, IDM (A): 0.01 0.01

Strain Gage Excitation:

+ 4.63 V ±10% Max Current: 400mA (short circuit protected)

Watts/Slot: 1

Cooling/Slot:

0.02 mm H

Humidity: 65% 0° to 40°C

Operating Temperature:

0° to 55°C

Storage Temperature:

-40° to 75°C

EMC, RFI, Safety:

meets FTZ 1046/1984, CSA 556B, IEC 348, UL 1244

Net Weight (kg): 0.9

O @ 0.10 liter/sec

Closed Channel Resistance:

<3.1 kΩ for high or low input (Guard not s witched)

Bandwidth (-3dB):

50Ω source, 1 MΩ | |10pF termination: >200 kH z

* Each FET is diode clamp ed to ±14V and a 220Ω series resistor. This limits the current to the clamp diodes.

Reference Junction Measurement Accuracy (HP E1353A only): 0.3 °C

(over 18° to 28°C operating temperature)

Appendix A HP E1351A/53A FET Multiplexer Specifications 79

Notes

80 HP E1351A/53A FET Multiplexer Specifications Appendix A

HP E1351A/53A Register-Based

About This Appendix

The HP E1351A and HP E1353 A FET and Thermocouple FET Multiplexers are register-bas ed modules which do not support the VXIbu s word serial protocol. When a SCPI command is sent to the multiplexer, the HP E1406A Command Module (Series C) or HP E1300A/E1301A Mainframe (Series B) parses the command and programs the multiplexer at the register level.

Register-based programming is a series of reads and writ es directly to the mu ltip lex er r egis ters . This i ncre as es thro ug hp u t sp ee d s i n ce it elimina tes command parsing and allows the use of an embedded controller. Also, if slot 0, the resource manager, and the computer (HP-IB) interface are provided by other devices, a C-size system can be downsized by removing the command module.

Appendix B

Programming

This appendix conta ins the informat ion you need for regist er-bas ed programming. The contents include:

Register addresses for register-based devices are located in the upper 25% of VXIbus A16 address spa ce. Every VXIbus devi ce (up to 256 devic es) is allocated a 32 word (64 byte) block of addresses. The HP E1351A/E1353A multiplexers use eight two-byte registers of the 64 addresses (32 word registers) allocated.

Figure B-1 shows the register address locat ion with in A16 as it might be mapped by an embedded controller. Figure B-2 shows t he location of A16 address space in the HP E1300A/E1301A Mainframe and HP E1405/06A Command Module.

• Register Addressing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 81

• Register Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 84

• Register Bit Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 86

• Executing Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 90

• Register-Based Programming for Maximum

Speed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 93

Appendix B HP E1351A/53A Register-Based Programming 81

Figure B-1. Multiplexer Registers within A16 Address Space

Figure B-2. Registers within HP E1301/E1406 A16 Address Space

82 HP E1351A/53A Register-Based Programming Appendix B

The Base Address When reading or writing to a multiplexer register, specify a hexadecimal or

decimal register addre ss. This address c onsists of a base address plus a register offset. The bas e addr ess used programming depends on whet her t he A16 address space is outside or insi de the HP E1405A/E1406A Command Module or HP E1300A/E1301A Mainframe.

A16 Ad dress Space

Outs id e the

Command Module

or Mainframe

A16 Ad dress Space

Inside the

Command Module

or Mainframe

When the command module or mainframe is not part of your VXIbus syst em (F igure B-1), the multiple xer’s bas e ad dress is c om puted as:*

C00016 + (LADDR * 64)

49,152 + (LADDR * 64)

where C00016 (49,152) is t he starting locatio n of the register addresses, LADDR is the multiplexer’s logical address, a nd 64 is the nu mber of address bytes per VXIbus device. For example, the multiplexer’s factory set logical address is 112. With this address, the multiplexer has a base address:

C00016 + (112 * 64) C00016 + 1C0016 = DC00

or (decimal)

49,152 + (112 * 64) 49,152 + 7,168 = 56,320

When the A16 a ddr e ss space is inside t he command module or mainfra me (Figure B-2), the mu ltiplex er’s base addre ss is computed as:

1FC00016 + (LADDR * 64)

2,080,768 + (LADDR * 64)

where 1FC00016 (2,080,768) is the starting location of the VXI A16 address es, LADDR is th e multiplexer’s logical address, and 64 is the number of address bytes per register-based device. Again, the multiplexer’s factory set logical address is 112. If this address is not changed, the multiplexer will have a base address of:

1FC00016 + (112 * 64) 1FC00016 + 1C0016 = 1FDC00

2,080,768 + (112 * 64) 2,080,768 + 7,168 = 2,087,936

* The "16" at the end of the address indicates a hexadecimal number.

Appendix B HP E1351A/53A Register-Based Programming 83

For example, with a LADDR of 112 the multiplexer’s Scan Channel Delay Register has an offset of 08 the offset is added to the base address to form the register address:

. When you write a command to this register,

DC0016 + 0816 = DC08 1FDC00

+ 0816 = 1FDC0816(A16 inside the comm and m odul e)

(A16 outside the comma nd modu le)

56,320 + 8 = 56,328 (A16 ou tsi de the comma nd modu le) 2,087,936 + 8 = 2,087,944 (A16 inside the comma nd modul e )

There are six WRITE and two READ-only registers on the multiplexer. You can READ-back three of the WRITE registers. This section contains a description and a bit map of each register. Note that the bit names with an * after them are True (asserted) when low (zero). An X represents a "do not care" situation and a 1 always represents 1.

WRITE Registers The followi ng WRITE r egisters are located on the multiplexer:

• Status/Control Register (base + 04

• Scan Control Register (base + 06

• Scan Channel Delay Register (base + 08

• Scan Channel Configuration R egister (base + 0A

• Direct Channel Co nf igurat io n Regist er (bas e + 0C

• Direct Control Register (base + 0E

)

READ Registers There are two READ- only regis ters and three READ-back registers.

• Manufacture r ID Regist er (bas e + 00

• Device Type Register (base + 02

• Status/Control Register (base + 04

• Scan Control Register (base + 06

• Scan Channel Delay Register (base + 08

Manufacturer ID Register

base + 00

Write Undefined

Read Device

1514131211109876543210

Class

Address

Space

Manufacturer ID

84 HP E1351A/53A Register-Based Programming Appendix B

) READ-only

) READ-on ly

)

Device Type Register

base + 02

Write Undefined

Read Model Code

1514131211109876543210

Status/Control Register

base + 04

Write Undefined X X X TRG

Read Undefined 1 1 1 BSY* 1 1 IRQ* IRQ

1514131211109876543210

DIR IRQENX CRD

INT

Scan Contro l Register

base + 06

Write Undefined X X X RST

Read Undefined 1 1 1 1 CNTENIMMENDBSENCLR

1514131211109876543210

CNTENIMMENDBSENCLR

PTR

RST

EN*

SCN

Scan Chann el Delay Regist e r

base + 08

Write Undefined XXXXD3D2D1D0

Read Undefined 1 1 1 1 D3 D2 D1 D0

1514131211109876543210

Scan Channel Configuration Register

base + 0A

Write VLD* A_D* B_D* C1 C0 X X X XXXXD3D2D1D0

Read Undefined

1514131211109876543210

Direct Channel Configurati on Regi ster

base + 0C

Write Undefined XXXXD3D2D1D0

Read Undefined

1514131211109876543210

Direct Contro l Regist e r

base + 0E

Write Undefine d X X X VLD* A_D* B_D* C1 C0

Read Undefined

1514131211109876543210

Appendix B HP E1351A/53A Register-Based Programming 85

This section contains a description of the function of each bit which is addressable in each register. The bits are listed according to the title of the WRITE bit name, with the READ def inition at the end of t he descriptio n. For registers 00 READ definition.

and 0216, the bits are listed according to the title of the

Manufacturer ID

base + 00

Write Undefined

1514131211109876543210

The 16-Channel FET Multiplexer Module always returns FFFF16 on a Manufacturer ID Register READ.

Device Class There are four classifications. The FET Multiplexer Module is a

Address Space The FET Mult iple xer Module uses A16 a d dress mode.

Manufacturer ID Hewlett-Pac kard’s ident ifi cati on numb er is 4095, which corresp on ds to bits

11 - 0 all set to 1.

Device Type

base + 02

Write Undefined

Read Model Code

1514131211109876543210

The Device Type Register c ontains a model code whic h i dentifies t he module.

Model Code Model Code. The following model codes ident ify the HP E1351A FET

Multiplexer and HP E1353A Thermocouple FET Multiplexer:

FF1016 HP E1351A 16-Channel FET Multiplexer FF1216 HP E1353A 16-Channel Thermocouple FET Multiplexer

86 HP E1351A/53A Register-Based Programming Appendix B

Status/Control

The Status/Control WRITE register is used to reset the module, enable interrupts, choose direct or scan list control of the channels and t o internally trigg er channe l closing. Th e RE AD regis ter indicates if i nt errupts a r e enabled, if there is an interrupt and if the module is busy.

base + 04

Write Undefined X X X TRIG

Read Undefined 1 1 1 BSY* 1 1 IRQ* IRQ

1514131211109876543210

DIR IRQENX CRD

INT

Card Reset (CRD RST) Writing a one (1) to bit 0 resets the multiplexer. Writing a zero turns the

reset function off. You must write a zero after a reset or the module will not operate. The R eset c ondit ions are: a ll Enables are set fals e, clear scan list, scan mode enabled (direct bit set 0), DELAY is l

µsec and all channe ls

opened.

Interrupt Request

Enable (IRQ EN)

Writin g a one (1) enables the card to gener a te interrupts, a zero (0) disa bles it. Enabling this bit puts a zero (0) in IRQ EN*.

Dire ct (D IR) Selects between direct control and scan lis t control. A zero (0) indicates

scan list contr ol a nd a o ne (1) indicates direct c ontr o l. For scan list control the Direct Re gisters (base + 0C, base + 0E) ar e invalidated. For di rect control the Scan Channel C onfiguration Register is invalidated.

Trigger Internal

(TRG INT)

Writing a one (1) immediately advances a channel on the scan list, a z ero (0) is the idle state. Bit is automatically set back to zero (0) upon c hannel advance.

RST

EN*

Interrupt Request

Readin g a z ero (0) indicates enabl ed, rea d ing a one (1 ) indicates disabled.

Enable (IRQ EN*)

Interrupt Request (IRQ*) Reading a zero (0) indicates an interrupt, a one (1) indicates no interrupt.

This bit remains on e (1) if IRQ EN is disabled. Interrupt remai ns set until Card Reset or interrupt has been acknowledged.

Busy (BSY*) This bit is set zero (0) during channel closing and the delay period. Triggers

will not be accepted. BSY* is unasserted at the beginning of the Channel Closed pulse. If a trigger occurs during the Channel Closed pulse, the pulse is terminated and the channel is advanced. Operates only with downloaded scan list (DIR is z ero).

Appendix B HP E1351A/53A Register-Based Programming 87

Scan Control

The Scan Control Register allows you to clear the scan list, set the trigger mode and reset the pointer to the beginning of the scan list. This register is a READ-back regist er, allowing you to verify the state of the WRITE register.

base + 06

Write Undefined X X X RST

Read Undefined 1 1 1 1 CNTENIMMENDBSENCLR

Digital Bus Enable

Immediate Enable

1514131211109876543210

CNTENIMMENDBSENCLR

PTR

Clear Scan List

(CLR SCN)

Writing a one (1) in this bit clears the scan list. Th e bit must be set back to zero (0) after flushing. CLR SCN (Read) returns the state of the bit.

Writin g a one (1) enables the digital bus trigger mode. A zero (0) disables

(DBS EN)

it. DBS EN (R ead) returns the state of the bit.

Writing a one (1) in this bit sets trigger to immediate, which means that as

(IMM EN)

soon as the first c hannel is closed by the TRG INT, t he ent ire scan list is r un without any furt her trigge r ing. Channel advance speed is determined by the delay time specified. This has extremely limited applications.

Continuous Enable

(CNT EN)

Writing a one (1) in this bit enables th e card to co ntinually cyc le through the scan list. When this b it is enab l ed, th e last channel in a scan list resets the pointer back to the beginning of the scan list.

Reset Pointer

(RST PTR)

Writing a one (1) resets the pointer back to the beginning o f t he scan list. CNT EN true automatically resets pointer at end of scan list. If CNT EN is set true, an interrupt also resets the pointer. If CNT EN is set false, the last channel in the scan list generates an interrupt if the channel is valid (VLD* set true).

SCN

Scan Chann el

Delay Register

The Scan Channel Delay Register sets the SETTling:TIME, the time between receipt of a channel closing trigger and the Channel Closed pulse. The delay is 2

µS and n has a range of 0 to 15. D3 to D0 set n, and D0 is the

least significant bit. This register is a read-back register, allowing you to verify the state of the WRITE register.

base + 08

Write Undefined XXXXD3D2D1D0

Read Undefined 1 1 1 1 D3 D2 D1 D0

1514131211109876543210

D3 - D0 D0 is the least significant bit, D3 is the most sign ificant. These bits

designate a number between 0 and 15 for

88 HP E1351A/53A Register-Based Programming Appendix B

Scan Chann el

Configuration

These bits set the <channel_list> for a scan list, set the type of measurement and enable/disable the tree isolation switches. Note that the DIR in the Status/Cont r o l Regist er must b e set false to enable this register.

base + 0A

Write VLD* A_D* B_D* C1 C0 X X X XXXXD3D2D1D0

Read Undefined

1514131211109876543210

D3 - D0 These bits set the channel number, with a range of 0 - 15. Bit D0 is the least

significant bit, and bit D3 is the most sig nificant.

Configuration Bit

These bits determine the measurement mode as listed below:

(C1 - C0)

C1 C0 0 0 Volts 0 1 2- wire ohms 1 1 4- wire ohms 1 0 Thermistor

Note that to obtain the Thermistor reference temperature for Thermocouple measurements, you must set the configuration bits for Thermistor. After you have obtained the reference temperature, set the bits for Volts.

B and A Tree Isolation

Switch Disable

(B-D*, A-D*)

A zero in either one disables the respective Tree Isolation Switch. Generally, both disabled together equal the

[ROUTe:]SCAN:PORT NONE

command.

Valid Channel (VLD*) A zero indicates that the specified channel is valid. When entering a scan

list the ent ire l ist must be loaded int o each module. For the channels that ar e not on that module, the V LD* mus t be se t fal se. S ee

[ROUTe:]SCA N in

the “Executing Commands” section in this Appendix.

Direct Channel

Configuration

base + 0C

Write Undefined XXXXD3D2D1D0

Read Undefined

1514131211109876543210

The Direct Channel Register allows you to specify channels to be closed individua lly. Note that the DIR bit in the Status/Control R e gister must b e set true for this register to be enabled.

D3 - D0 These data bits set the channel number with a range of 0 - 15. Bit D0 is the

least significan t bit, and bit D3 is the most signif icant.

Appendix B HP E1351A/53A Register-Based Programming 89

Direct Control

The Direct Control Register allows you to set the controls for individual channels. Note that the DIR bit in the Status/Control R e gister must b e s et true for this register to be enabled.

base + 0E

Write Undefine d X X X VLD* A_D* B_D* C1 C0

Read Undefined

1514131211109876543210

C1 - C0 These configuration bits determine the measurement mode as listed below:

C1 C0 0 0 Volts 0 1 2- wire ohms 1 1 4- wire ohms 1 0 Thermistor

B and A Tree Isolation

Switch Disable

A zero in either one disables the respective tree isolation switch. Generally, both disabled together equal the

[ROUTe:] SCAN: PO RT NO NE co mmand.

(B-D*, A-D*)

Valid Channel (VLD*) A zero indicates that the specified channel is valid. If DIR is valid and

INT EN is true, a WR ITE to this register will generate an interrupt.

Executing Commands

This command lists the SCPI commands and shows how to execute them with register-based progra mming. For further information on r e gister-bas ed programming see the HP E1326B Multimeter User’s Man ual.

ABORt ABORt does not have an equivalent in register-based programming. This

command is executed from the front panel or over HP-IB.

ARM:COUNt The ARM:COUNt c ommand does not have an equiva le nt in r e gister-based

programming. To sca n for a s pecified number of cyc les, use the interrupt generated at the end of the scan list to advance through a program loop for the set number of cycles. For each pass through the loop, reset the pointer to the begi nning of the scan list. Th e IRQ EN in t he Status/Control Register must be enabled.

DISPlay:MONitor The DISPlay:MONitor[: ST ATe] comma nd d oes not have an equivalent i n

DISPlay:MONit or O FF.

INITiate INITiate:CONTinuous is equ ivalent to the CNT EN bit in the Scan Cont r o l

90 HP E1351A/53A Register-Based Programming Appendix B

INITiate[:IMMed iate] is equivalent to writing a one to the TRG INT in the

Status/Control Register. The TRG INT s ets itself back to zero after pulsing the FET. If you have a multiple-module configuration and a downloaded scan list, the module with the first channel on the scan list must be the last one to receive the TRG INT. The scan cycle will start as soon as the card with a valid channel receives TRG INT.

OUTPut The OUTPut[:STATe] command does not have an equivalent in

[ROUTe:] [ROUTe:]CLOSe <channel_list> is equivalent to the following:

• DIR in the Status/C ontrol Register is enabled.

• D0 to D3 is set to a channel number in the Direct Channel

Configuration Register.

[ROUTe:]O PEN <channel_list> can be implemented by setting VLD* false

in either the Scan Channel Configuration Register or the Direct Control Register (whichever one closed the channel). It can also be implemented by toggling the DIR bit in the Status/Control Register.

[ROUTe:]SCAN <channel_list>, the complete scan list mu st be loaded

For in each module in a multiple-module configuration. The channel is set valid if it is in that module, and i nvalid i n the other modu les. Th e channel list is downloaded in t he following way:

• Set CLR SCN in Scan Control Register to one, then back to zero, to

clear the previous scan list.

• DIR in the Status/C ontrol Register is set to false.

• Channel number is set in D0 to D3 in the Scan Channel

Configuration Register.

The example below shows how to set a scan list for channels (@100,101,200,201):

• Write to the Scan Channel Configuration Register on card 1:

VLD* true (0), 0000 to D3-D0 Sets channel 100. VLD* true (0), 0001 to D3-D0 Sets channel 101. VLD* false (1), XXXX to D3-D0 Reserv e s posit io n in scan l ist for

channel 200.

VLD* false (1), XXXX to D3-D0 Reserv e s posit io n in scan l ist for

channel 201.

• Write to the Scan Channel Configuration Register on card 2:

VLD* false (1), XXXX to D3-D0 Reserv e s posit io n in scan l ist for

channel 100.

VLD* false (1), XXXX to D3-D0 Reserv e s posit io n in scan l ist for

channel 101.

VLD* true (0), 0000 to D3-D0 Sets channel 200. VLD* true (0), 0001 to D3-D0 Sets channel 201.

Appendix B HP E1351A/53A Register-Based Programming 91

The [ROUTe:]SCAN:MODE VOLT | RES | FRES is set with C1 and C0 in the Scan Channel or Direct Control Register. Note that to obtain the Thermistor reference temperature for Thermocouple measurements, you must set the configuration bits for Thermistor. After you have obtained the reference temperature, set the bits for Volts.

C1 C0 0 0 Volts 0 1 2- wire ohms 1 1 4- wire ohms 1 0 Thermistor

[ROUTe:]SCAN:PORT NONE | ABUS

is set with A_D* and B_D* on the Scan Channel Configuration or Direct Control Registers. Set both bits to one for

[ROUTe:]SETTling[:TIME] is set with the D3 to D0 bits in th e Scan

Channel Delay Register. The bits form a number and the delay is 2

ABUS and to zero for NONE.

µsec.

n (n

is between 0 and 16),

SYSTem SYSTem:CDEScription? is a READ on the Manufacturer ID Register.

SYSTem:CTYPe? is a READ on the Device Type Register.

SYSTem:CPON can be achieved by setting the DIR bit true in the

Status/Cont r o l R egister and setting VLD* false. This opens all channe ls without a card reset.

TRIGger TRIGger[:IMMediate] is equ iva le nt t o writ ing a one to TRG INT in the

Status Control Register. The register returns to zero after pulsing the channel.

TRIGger:SOURce IMMediate and TRIGger:SO URce DBUS ar e execu ted

with the IMM EN and DBS EN bits in the Scan Control Register.

TRIGger:SOURce BUS and TRI Gger:S OURce EXTern al are not

implemented at the register level. These commands both write to the TRG INT bit when they are active and a trigger occurs.

TRIGger:SOURce HOLD is not implemented at the register level. It is in

the normal state when all trigger sources are disabled.

92 HP E1351A/53A Register-Based Programming Appendix B

This is an outline of the algorithm that needs to be followed to have the

HP E1326B 5 HP E1351A 16-Channel FET Multiplexer. This procedure programs the multimeter and downloads a sca n list to the FET multiple xer so the hardware controls the entire scann ing process. The HP E1326B has several things that should be understood when doin g register programming.

1. Table B-1 on page 96 lists the multime t er’s commands. Wh en doing any of these commands, you are writing to registers which are read by the multimeter’s voltmeter mi crop ro cess or . It is important t o fol low the procedure in Figure B-3 on page 97 on how to send commands. This will enable you to handshake with the E1326B microprocessor as you can easily write commands faster than the processor can execute them.

2. In order to program t he HP E13 26B M u ltime ter to take readings with the HP E1351A FET Multiplexer at its highest speed, do the co mmands from Table B-1 on page 96. Note that all values in Table B-1 are specified in decimal.

⁄2 Digit Multimeter do high-speed scanning using the

set the function dcv set the range 1V

Note: You must have a fixed range to do 13k. Auto range will do 2.5k.

set the aperture 10 µsec

Note: This will caus e readings to be returned as 16 bits .

set the auto zero off or once set offset Compensation off set trigger sourc e Immediate set trigger count 1 set trigger delay 0 set Sample Count 16

This should be the total number of A/D readings that you will take (for example, once through a 16 channel list = 16, 10 times through a 16 channel list = 160).

set sample Source Timer This is the time between A/D readings. set sa m ple Pe r iod 76µs 76 µsec is the minimum or fastes t A/D time. set trigger arm armed This arms the DVM to take all of the reading specified above.

Do not execute the next command yet. You still need to set the scan list in the HP E1351 A. Trigger immediate wil l start everything.

3. Now download the channel list to the HP E1351A

• Set CLR SCN in Scan Control Register to one, then back to zero in

order to cl ear the prev ious scan list.

• DIR in the Status/Control Regist er set to false.

Appendix B HP E1351A/53A Register-Based Programming 93

Now write once for each channel in your scan list to the Channel Configuration Register. This register loads up a FIFO that will later rotate each time the HP E1326B issues a VM complete on the digital bus. If you have more than one FET multiplexer, you must load up the FIFOs on each one. The VLD bit specifies if a channel is on this card. Note that you must load the entire scan list to each HP E1351A FET Multiplexer, with only the VLD bit being different. The FIFO, and hence the scan list, ca n be a maximum of 512 channels.

i.e. VLD A_D B_D C0-C1 D0-D3

0 1 1 volts 0 0 1 1 volts 1 0 1 1 volts 2 0 1 1 volts 3 0 1 1 volts 4 0 1 1 volts 5 0 1 1 volts 6 0 1 1 volts 7 0 1 1 volts 8 0 1 1 volts 9 0 1 1 volts 10 0 1 1 volts 11 0 1 1 volts 12 0 1 1 volts 13 0 1 1 volts 14 0 1 1 volts 15

Now, do the following to the HP E1351A:

write to register: decimal code:

4 8 Select direct control. 6 26 Enable digital bus tr iggering

con tinuo us scanning, poin ter

to beginning of scan. 4 0 Control back to DVM. 4 16 Close first channel.

The HP E1351A FET Multiplexer is now ready. It will advance to the next channel every time a VM complete is received.

VM complete is a output from the multimeter that always occurs after an A/D reading is complete. The digital bus cable wires the VM Complete from the voltmeter to the Channel Advance on the FET multiplexer card. The above command (to reg 6 value 26) enab les digital bus triggering, which enables the FET Multiplex er to use this signal. Make sure that you have both a analog bus cable and a digital bus cable connect ed.

4. To start everything, issue the Trigger Immediate command from Table B-1 on page 96, to the HP E1326B.

94 HP E1351A/53A Register-Based Programming Appendix B

The numb er of re adings specif ied in sample count will now be ta ken. If the sample count is more than one scan, the scan list will start over again.

5. The voltmeter is now ta king data whic h is b eing stored in the HP E1326B hardware FIFO. With the 10 µsec aperture set, 512 16-bit readings will collect here. In any other aperture only 256 32-bit readings will collect. If you specified more than 512 readings, the computer needs to be removing them from the FIFO w hile readings are being taken. The DVM FIFO is connected to th e HP E1326B VXI DATA BUFFER r egister.

To read the FIFO check the Data Ready bit in the Status Register to determine if valid data is in the Data Buffer. Or, read the Data Buffer and throw away any -1 readings, as a -1 decimal reading or all bits set to "1" indicates invalid data. Keep reading the Data Buffer until you receive the number of readings specified in Sample Count. Convert the readi ngs from voltmeter format to 32-bit real format.

6. To do debugging with the HP E1326B vol tmeter, use the Query Opcodes in Table B-1. This will verify that you have set the correct parameters. Use the Send Error command (15) to get error codes back. Refer to Table B-2 on page 98.

With the HP E1351A you cannot read back the contents in the FIFO, therefore, deb u gging is difficult. Do verify that y ou get correct data back from the Manufacturer ID Register and Device Type Register.

Appendix B HP E1351A/53A Register-Based Programming 95

Multimeter

Command and

Table B-1 contains the multimeter command and parameter opcodes. The opcod es us ed to qu ery the par ameter settings are also inc lu ded.

Parameter Opcodes

Table B-1. Multimeter Command and Paramet er Opcodes

Multimeter

Parameter

Measurement Function

Range 02 00

Aperture Time 00 00

Autozero 08 00

Offset Compensation

Trigger Source 06 00

Trigger Count 39 <upper byte>

Trigger Delay 23 <upper byte>

Voltmeter Complete Signal Destinat i on

Sample Count 38 <upper byte>

Sample Sourc e 07 00

Sample Per iod (5)

Software Sample (6)

Trigger Arm 12 00

Trigger Immed iate 13 — - —- — - ... Send Error 15 —- —- —- —-

Command

Opcode

04 00

36 00

40 8-bit bina ry n u mb e r

10 <upper byte>

35 —- —- —- ...

Parameter

Opcode

01 02

01 02 03 04 05

01 02 03 04 05 06

01 02

01 02 03 - 0A

(7)

01 02 03

Value Query

DCV ACV (4-wir e) O HMS

125 mV / 256 Ω 1V / 2.04 8 kΩ 8V / 16.384 kΩ 64V / 131 kΩ 300V / 1.048 MΩ Autorange

267 ms

16.7 ms 320 ms 20 ms

2.5 ms 100 µs 10 µs

On Off Once

Off On

Immediate External Hold TTL trigger lin es 0 - 7

1 - 16,77 7, 2 15 (1),(3)

0 - 16.777215s (1)

0 - 7 (TTL trigger lines)

1 - 16,77 7, 2 15 (1),(4)

Immediate Timer Software Control Register

76µs - 65.534m s (1)

Un-armed Armed

Opcode

05 pa rameter

03 pa rameter

01 pa rameter

09 pa rameter

37 pa rameter

29 pa rameter

33 24-bit unsigne d

31 24-bit unsigne d

41 8-bit binary numbe r

32 24-bit unsigne d

30 pa rameter

11 16-bit unsigne d

—- —-

opcode

number (2)

opcode

number (2)

Query

Response

Table B-1 Continued on Next Page

96 HP E1351A/53A Register-Based Programming Appendix B

Table B-1. Multimeter Command and Paramet er Opcodes (continued)

(1) Specified as a 2’s complement binary number. For three byte parameters <upper byte> = value shifted 16 bits to the right (>>16), <middle byte> = value shifted 8 bits to the right (>>8), <low er byte> = value. For two byte param eters <upper byte> = value shifted 8 bits to the right (>>8), <lower byte> = value & 0xFF.

(2) Reading the Query Respon se register two times (16-bit numb er) or three times (24-b it number) returns in order; th e high byte, middl e byt e, and low byt e.

(3) A parameter value of 0 sets infinite triggers per trigger arm. (4) A parameter value of 0 sets infinite samples per trigger. (5) Set when Sam ple Source is Timer. (6) Used when Sample Sourc e is Software. The firs t measurem e nt of each burst occurs when the trigg er signal i s

received (e.g. Trigger Immediate). Subsequent measurements in the burst occur when Sof t ware Sample is writt en to th e Command regi ster .

(7) Up to seven VXIbus TTLTrg trigger lines can be selected. 01 selects line 0, FF selects all lines.

Figure B-3. Configuring the Multimeter

Appendix B HP E1351A/53A Register-Based Programming 97

Multimeter

Programming Error

Codes

Table B-2. Multimeter Register-Based Programmi ng Error Cod es

Error Cod e Cause

Multimeter error codes related to register-based programming are listed in Table B-2.

00 01 02 03 04

0C 0E

No error has occurred sin c e th e last error code wa s r ead. Unrecognized comma nd opc od e. A parameter was r equir ed but a command was r ec eived. A parameter is invalid or out of range for the specified comma nd. Reading overr un. The data buffer i s fu ll and another measurement is ta ken.

This error also occur s wh en a new command ( opco d e) is received while the multimeter is placing a readi ng in th e data bu ffer. Trigger Arm is disabl ed .

The command or parameter received is not allowed in the two byte reading mode (10 µs a perture ti m e).

Command is terminated by another comman d. The aperture ti m e is longer than the sample rate. Input overload. A potentially damaging voltage has been applied to the

multimeter: > +- 40V betw een HI and LO or HI and COMMO N wi th t h e rang e <= 8V

> +- 40V between LO and CO MMO N on any r ange Under this condition, th e multimeter disconnects itself from the input.

A new range mus t be sp ecifi ed to r esto r e opera tion .

98 HP E1351A/53A Register-Based Programming Appendix B

HP E1351A/53A FET Multiplexer Error

Table C-1 lists the erro r me ssag es ass ociated wit h the multiplexer modules programmed wit h SCPI c ommands . S ee t he HP E1406A Command Module User’s Manual for complete information on error messages.

Table C-1. 16-Channel FET Multiplexer E rror Message s

No. Title Potential Causes

Appendix C

Messages

–211 Trigger Ignored Trigger rec eived when scan not enabled. Trigger received af ter scan

–213 INIT Ignored Attempting to execute an INIT command when a scan is already in

–224 Illegal Parameter Value Attempting to execute a comm and with a paramet er not applicabl e to th e

1500 External Trigger Source Already

Allocated

2000 Invalid Card Number Addressing a modul e (card) in a switchbo x that i s not part of the

2001 Invalid Channel Number Attempting to address a channel of a module in a switchbox that is not

2006 Command Not Supported On

This Card 2008 Scan List Not In iti al ized Executing a Scan without the INIT command. 2009 Too Many Channels in Channel

List 2010 Scan Mode Not Allowed On

This Card. 2011 Empty Channel List 2012 Invalid Channel Range

complete. Trigger too fast.

progress.

command. Assigning an external tri gger source to a switchbox when the trigger

source has alr eady b een assi gn ed to anot her swi t chbo x.

switchbox.

supported by th e mo dule (for example, ch. 99 of multiplexer module). Sending a comma nd t o a modul e (card ) in a switc hbox tha t is

unsupported by th e module.

Attempting to add r ess mor e channels than avai labl e in the switchbox.

Attempting to execute a SCAN:MODE which is not supported.

No valid channels in Invalid channel(s) specified in SCAN <

Attempting to begin scanning w hen no valid channel list is defined.

<channel_list>.

chan nel_list> command.

2017 Incorrect ARM:COUNt Attempting to run a downloaded scan list with ARM:COUNt set to value

2600 Function Not Supported On

This Card 2601 Channel List Required Sen d ing a command requiring a channel list without the channel list.

other than 1. Sending a comma nd t o a modul e (card ) in a switc hbox tha t is not

supported by the modul e or switchbox.

Appendix C HP E1351A/53A FET Multiplexer Error Messages 99

Notes

100 HP E1351A/53A FET Multiplexer Error Messages Appendix C

HP (Hewlett-Packard) 53A, E1351A User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual