HP E1472A User manual

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HP E1472A/73A/74A/75A User’s Manual Contents
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
WARNINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Safety Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Manual Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Manual Content . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Suggested Sequence to Use This Manual . . . . . . . . . . . . . . . . . . . . . . . . . 7
Chapter 1: Getting Started
RF Multiplexer Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Basic Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Typical Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Instrument Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Programming the RF Multiplexer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Specifying SCPI Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
RF Multiplexer Channel Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . 12
RF Multiplexer Card Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Module Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Channel Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
SCPI Command Format Used in This Manual . . . . . . . . . . . . . . . . . . . . 14
Initial Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Chapter 2: Configuring the RF Multiplexer Modules
Warnings and Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Setting the Address Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Selecting the Interrupt Priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Expanding the RF Multiplexer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Selecting the Relay Drive Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Connecting User Inputs To E1472A/73A . . . . . . . . . . . . . . . . . . . . . . . . . 23
Cabling Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Connecting User Inputs To E1474A/75A . . . . . . . . . . . . . . . . . . . . . . . . . 24
Cabling Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Example 1: Connection to a Network Analyzer . . . . . . . . . . . . . . . . . . . . 25
Example 2: Connection to a Network Analyzer . . . . . . . . . . . . . . . . . . . . 26
Cables and Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Chapter 3: Using the RF Multiplexer
RF Multiplexer Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Reset Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Switching Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Example: Standard Switching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Example: Tree Switching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Example: Matrix-Type Switching . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
HP E1472A/73A/74A/75A User’s Manual Contents - 1

Recalling and Saving States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Storing States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Recalling States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Detecting Error Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Checking for Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Synchronizing the RF Multiplexer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Synchronizing Instruments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Querying the RF Multiplexer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Chapter 4: RF Multiplexer Command Reference
Command Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Common Command Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
SCPI Command Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
SCPI Command Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Subsystem Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Common Command Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Chapter A: Specifications
50-Ohm RF Multiplexer Specifications . . . . . . . . . . . . . . . . . . . . . . . . . 51
INPUT CHARACTERISTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
AC PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
DC PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
75-Ohm RF Multiplexer Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 52
INPUT CHARACTERISTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
AC PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
DC PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Relay Life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
End-of-Life Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Replacement Strategy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Chapter B: RF Multiplexer Registers
Addressing the Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Reading the Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
ID and Device Type Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Status/Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Remote Module ID Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Channel Enable Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Writing to the Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Status/Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Channel Enable Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Selecting Channels Using Your Own Relays . . . . . . . . . . . . . . . . . . . . . . . . 61
Example: Using the Register and Pin-out Maps . . . . . . . . . . . . . . . . . . . . 63
Chapter C: RF Multiplexer Error Messages
Contents - 2 HP E1472A/73A/74A/75A User’s Manual

Certification
Hewlett-Packard Company certifies that this product met its published specifications at the time of shipment from the factory. Hewlett-
Packard further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technol-
ogy (formerly National Bureau of Standards), to the extent allowed by that organization’s calibration facility, and to the calibration
facilities of other International Standards Organization members.
Warranty
This Hewlett-Packard product is warranted against defects in materials and workmanship for a period of three years from date of ship-
ment. Duration and conditions of warranty for this product may be superseded when the product is integrated into (becomes a part of)
other HP products. During the warranty period, Hewlett-Packard Company will, at its option, either repair or replace products which
prove to be defective.
For warranty service or repair, this product must be returned to a service facility designated by Hewlett-Packard (HP). Buyer shall pre-
pay shipping charges to HP and HP shall pay shipping charges to return the product to Buyer. However, Buyer shall pay all shipping
charges, duties, and taxes for products returned to HP from another country.
HP warrants that its software and firmware designated by HP for use with a product will execute its programming instructions when
properly installed on that product. HP does not warrant that the operation of the product, or software, or firmware will be uninterrupted
or error free.
Limitation Of Warranty
The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by Buyer, Buyer-supplied prod-
ucts or interfacing, unauthorized modification or misuse, operation outside of the environmental specifications for the product, or im-
proper site preparation or maintenance.
The design and implementation of any circuit on this product is the sole responsibility of the Buyer. HP does not warrant the Buyer’s
circuitry or malfunctions of HP products that result from the Buyer’s circuitry. In addition, HP does not warrant any damage that oc-
curs as a result of the Buyer’s circuit or any defects that result from Buyer-supplied products.
NO OTHER WARRANTY IS EXPRESSED OR IMPLIED. HP SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
Exclusive Remedies
THE REMEDIES PROVIDED HEREIN ARE BUYER’S SOLE AND EXCLUSIVE REMEDIES. HP SHALL NOT BE LIABLE
FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WHETHER BASED ON CON-
TRACT, TORT, OR ANY OTHER LEGAL THEORY.
Notice
The information contained in this document is subject to change without notice. HEWLETT-PACKARD (HP) MAKES NO WAR-
RANTY OF ANY KIND WITH REGARD TO THIS MATERIAL, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WAR-
RANTIES 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 docu-
ment contains proprietary information which is protected by copyright. All rights are reserved. No part of this document may be photo-
copied, reproduced, or translated to another language without the prior written consent of Hewlett-Packard Company. HP assumes no
responsibility for the use or reliability of its software on equipment that is not furnished by HP.
U.S. Government Restricted Rights
The Software and Documentation have been developed entirely at private expense. They are delivered and licensed as "commercial
computer software" as defined in DFARS 252.227-7013 (Oct 1988), DFARS 252.211-7015 (May 1991) or DFARS 252.227-7014
(Jun 1995), as a "commercial item" as defined in FAR 2.101(a), or as "Restricted computer software" as defined in FAR 52.227-19 (Jun
1987) (or any equivalent agency regulation or contract clause), whichever is applicable. You have only those rights provided for such Soft-
ware and Documentation by the applicable FAR or DFARS clause or the HP standard software agreement for the product involved.
HP E1472A, E1473A, E1474A, E1475A 50- & 75-Ohm RF Multiplexers/Expanders User’s Manual
Edition 2
Copyright © 1992 Hewlett-Packard Company. All Rights Reserved.
HP E1472A/73A/74A/75A User’s Manual 3

Frame or chassis ground terminal—typi-
cally connects to the equipment’s metal
frame.
Alternating current (AC).
Direct current (DC).
Indicates hazardous voltages.
Calls attention to a procedure, practice, or
condition that could cause bodily injury or
death.
Calls attention to a procedure, practice, or con-
dition that could possibly cause damage to
equipment or permanent loss of data.
Indicates the field wiring terminal that must
be connected to earth ground before operat-
ing the equipment—protects against electri-
cal shock in case of fault.
Instruction manual symbol affixed to prod-
uct. Indicates that the user must refer to the
manual for specific WARNING or CAU-
TION information to avoid personal injury
or damage to the product.
or
WARNINGS
The following general safety precautions must be observed during all phases of operation, service, and repair of this product.
Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design,
manufacture, and intended use of the product. Hewlett-Packard Company assumes no liability for the customer’s failure to
comply with these requirements.
Ground the equipment: For Safety Class 1 equipment (equipment having a protective earth terminal), an uninterruptible safety earth
ground must be provided from the mains power source to the product input wiring terminals or supplied power cable.
DO NOT operate the product in an explosive atmosphere or in the presence of flammable gases or fumes.
For continued protection against fire, replace the line fuse(s) only with fuse(s) of the same voltage and current rating and type.
DO NOT use repaired fuses or short-circuited fuse holders.
Keep away from live circuits: Operating personnel must not remove equipment covers or shields. Procedures involving the removal
of covers or shields are for use by service-trained personnel only. Under certain conditions, dangerous voltages may exist even with the
equipment switched off. To avoid dangerous electrical shock, DO NOT perform 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 features built into this product have been im-
paired, either through physical damage, excessive moisture, or any other reason, REMOVE POWER and do not use the product until
safe operation can be verified by service-trained personnel. If necessary, return the product to a Hewlett-Packard Sales and Service Of-
fice for service and repair to ensure that safety features are maintained.
DO NOT service or adjust alone: Do not attempt internal service or adjustment unless another person, capable of rendering first aid
and resuscitation, is present.
DO NOT substitute parts or modify equipment: Because of the danger of introducing additional hazards, do not install substitute
parts or perform any unauthorized modification to the product. Return the product to a Hewlett-Packard Sales and Service Office for
service and repair to ensure that safety features are maintained.
WARNING
CAUTION
Documentation 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 Edi-
tion number increments by 1 whenever the manual is revised. Updates, which are issued between Editions, contain replacement pages
to correct or add additional information to the current Edition of the manual. Whenever a new Edition is created, it will contain all of
the Update information for the previous Edition. Each new Edition or Update also includes a revised copy of this documentation his-
tory page.
Edition 1 (Part Number E1472-90001). . . . . . . . . . . . . . . . . . . . . . January 1990
Edition 1 (Part Number E1474-90001). . . . . . . . . . . . . . . . . . . . . . October 1991
Edition 2 (Part Number E1472-90002). . . . . . . . . . . . . . . . . . . . November 1992
Safety Symbols
4 HP E1472A/73A/74A/75A User’s Manual

Declaration of Conformity
according to ISO/IEC Guide 22 and EN 45014
Manufacturer’s Name: Hewlett-Packard Company
Loveland Manufacturing Center
Manufacturer’s Address: 815 14th Street S.W.
Loveland, Colorado 80537
declares, that the product:
Product Name: Six 1x4, 50- and 75-Ohm RF Multiplexer and Expander
Model Number(s): HP E1472A/E1473A/E1474A/E1475A
Product Options: All
conforms to the following Product Specifications:
Safety: IEC 348:1978/HD 401 S1:1981
CSA 556B
UL 1244
EMC: CISPR 11:1990/EN55011 (1991): Group1 Class A
EN50082-1:1992
IEC 801-2:1991: 4kVCD, 8kVAD
IEC 801-3:1984: 3 V/m
IEC 801-4:1988: 1kV Power Line, 0.5kV Signal Lines
Supplementary Information: The product herewith complies with the requirements of the Low Voltage Directive
73/23/EEC and the EMC Directive 89/336/EEC and carries the "CE" marking accordingly.
Safety qualification performed May, 1989.
Tested in a typical HP B-size VXI configuration.
European contact: Your local Hewlett-Packard Sales and Service Office or Hewlett-Packard GmbH, Department
HQ-TRE, Herrenberger Straße 130, D-71034 Böblingen, Germany (FAX [phone]).
September 5, 1996 Jim White, QA Manager
HP E1472A/73A/74A/75A User’s Manual 5

Notes
6 HP E1472A/73A/74A/75A User’s Manual

How to Use this Manual
1
Manual Overview This manual shows how to operate, configure, and program the HP E1472A
50 Ω RF Multiplexer, E1473A 50 ΩRF Multiplexer Expander, E1474A
75 ΩRF Multiplexer, and E1475A 75 Ω RF Multiplexer Expander modules.
Except where noted, the term “RF Multiplexer” refers to the HP E1472A
50 Ω RF Multiplexer and E1474A 75 Ω RF Multiplexer Modules. The term
“Expander” refers to the HP E1473A 50 Ω RF Multiplexer Expander, and E1475A
75 Ω RF Multiplexer Expander Modules.
The RF Multiplexer is a VXIbus C-Size register-based slave device, and can operate
in a C-size VXIbus mainframe using an HP Command Module such as the HP
E1405 or HP E1406. For other manufacturers’ mainframes, refer to the applicable
manual supplied by the manufacturer.
Most information in this manual applies to RF Multiplexer operations in anHP
75000 Series C System Command Module. The Standard Commands for
Programmable Instruments (SCPI) is used as the programming language. For
non-SCPI programming, refer to Appendix B for register-based programming.
1
Manual Content This manual has four chapters and three appendixes.
•Chapters 1 and 2 provide RF Multiplexer and Expander descriptions and
configurations, and Chapter 3 shows several ways to use the RF
Multiplexer and the Expander. For basic operations using SCPI, use
these chapters. For register programming use Chapters 1 and 2, and
appendix B.
•Chapter 4 describes SCPI commands.
•Appendix A lists the RF Multiplexer specifications and provides
information about relays, Appendix B has register based program-
ming information, and Appendix C lists error codes and messages.
1
Suggested
Sequence to Use
This Manual
BASIC OPERATIONS/
CONFIGURATION
CHAPTER 1 CHAPTER 2
CHAPTER 1 CHAPTER 2
CHAPTER 3
APPENDIX B
CHAPTER 4
ADVANCED/REFERENCE
INFORMATION
SCPI
Programming
Register
Programming
HP E1472A/73A/74A/75A User’s Manual 7

Notes
8 HP E1472A/73A/74A/75A User’s Manual

1
Getting Started
Using This Chapter This chapter describes the RF Multiplexer and Expander modules, and contains
information on how to program them using SCPI (Standard Commands for
Programmable Instruments) commands. This chapter contains the following
sections:
•RF Multiplexer Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 9
•Instrument Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 11
•Programming the RF Multiplexer . . . . . . . . . . . . . . . . . . . . . . . . . Page 11
•Initial Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 15
1
RF Multiplexer
Description Refer to Figure 1-1 for the following explanation of the 50 Ohm and 75 Ohm RF
Multiplexer and 50 Ohm and 75 Ohm RF Multiplexer Expander modules.
General Description The RF Multiplexer (6 x 4:1) and the Expander (6 x 4:1) modules are VXIbus
C-Size register-based products which provide bidirectional switching for user inputs
and outputs. Switching consists of connecting one channel to common in that bank.
The RF Multiplexer can operate in a C-Size VXIbus mainframe using an HP
Control Module such as an HP E1405 or HP E1406.
Up to two Expander modules can be controlled by a single RF Multiplexer module,
providing a total of eighteen (4:1) multiplexer banks. These Expander modules can
either be inserted into the C-Size mainframe next to the RF Multiplexer, or can be
located up to eight meters from the RF Multiplexer using the remote expander
cables. Locating the Expander module close to the external device keeps
connecting cable lengths to a minimum, thereby reducing the possibility of
cross-talk and insertion loss of high frequency signals.
You may connect either HP E1475A 75 Ohm Expander Relay Modules or
the HP E1473A 50 Ohm Expander Relay Modules to the HP E1472A or
HP E1474A Multiplexer module. The drivers on both modules can support either
of the expander relay modules.
Basic Operation The RF Multiplexer module and each Expander module consists of six banks of
channels (bank 0 through bank 5) to form six 4:1 multiplexers. The switching
sections of the RF Multiplexer and Expander modules are identical. See Figure 1-1
for a simplified switching diagram. Banks are arranged as follows:
•Bank 0 includes channels 00 through 03 and Com 00.
•Bank 1 includes channels 10 through 13 and Com 10.
•Bank 2 includes channels 20 through 23 and Com 20.
•Bank 3 includes channels 30 through 33 and Com 30.
•Bank 4 includes channels 40 through 43 and Com 40.
•Bank 5 includes channels 50 through 53 and Com 50.
Chapter 1 Getting Started 9

Note: During Power off, Power Up, and Reset,
Channel 0 is connected to COM on Each Bank.
RF MUX
Figure 1-1. Multiplexer/Expander Switching Diagram
10 Getting Started Chapter 1

In the remainder of this manual, channels are referred to as n0 through n3 and Com
n0, where n is the bank number (0 through 5). Each channel is switched (connected
to its common) by closing the appropriate (nonlatching) relays. Channels n0
through n3 can be switched to Com n0 for all banks. Only one channel in each
bank can be connected to its common at a time.
User inputs/outputs to each channel are via SMB connectors. When a channel is
CLOSed, it is internally connected to the COMmon connector. When a channel is
open, it is internally disconnected. Open channels are not terminated. At
power-off, power-on, or reset, channel n0 is switched to the COM n0 connector,
and all other channels (n1 through n3) are open (non-terminated) for all banks.
Typical Configuration The RF Multiplexer and Expander relays are configured in a “tree” structure which
provides high isolation and low VSWR (voltage standing wave ratio). Each
channel can switch user inputs up to 24 watts (42 V peak). User input frequencies
to the 50 Ω RF Multiplexer and Expander modules can be from DC to 3 GHz. User
input frequencies to the 75 Ω RF Multiplexer and Expander modules can be from
DC to 1.3 GHz. The RF Multiplexer can be configured for several arrangements,
such as standard, tree, or matrix (see Chapter 3 for more information).
For a SCPI (Standard Commands for Programmable Instruments) environment, one
or more RF Multiplexers (with or without Expanders connected) can be defined as a
switchbox instrument. For a switchbox instrument, all RF Multiplexer channels
within the instrument can be addressed using a single interface address.
1
Instrument
Definition HP plug-in modules installed in an HP mainframe or used with an HP command
module are treated as independent instruments each having a unique secondary
HP-IB address. Each instrument is also assigned a dedicated error queue, input and
output buffers, status registers and, if applicable, dedicated mainframe/
command module memory space for readings or data. An instrument may be
composed of a single plug-in module (such as a counter) or multiple plug-in
modules (for a Switchbox or Scanning Voltmeter Instrument).
1
Programming the
RF Multiplexer To program the RF Multiplexer using SCPI, you must select the controller
language, interface address, and SCPI commands to be used. Guidelines to select
SCPI commands for the RF Multiplexer follow. Refer to your specific
HP Control Module Manual for interface addressing and controller language
information.
Chapter 1 Getting Started 11

Note This discussion applies to SCPI programming. See Appendix B (RF Multiplexer
Registers) for details on RF Multiplexer registers.
Specifying SCPI
Commands To address specific channels within an RF Multiplexer, you must specify the SCPI
command and RF Multiplexer channel address. For the RF Multiplexer, use
CLOSe (channel_list) to switch (connect) channels.
RF Multiplexer
Channel Addresses For the RF Multiplexer, the channel address (channel_list) has the form
(@ccmmnn) where cc = RF Multiplexer card number (01-99), mm=RF
Multiplexer/Expander module number (00-02), and nn = channel number
(00-03,10-13,20-23,30-33, 40-43, or 50-53). Use the form:
•(@ccmmnn) for a single channel
•(@ccmmnn,ccmmnn) for multiple channels
RF Multiplexer Card
Numbers The RF Multiplexer card number depends on the switchbox configuration
(single-module or multiple-module) set for the RF Multiplexers. (Leading zeroes
can be ignored for the card number.)
Note The Expander module (s) card number is the same as the RF Multiplexer it is
connected to.
•Single-module. For a single-module switchbox, the card number is always
01.
•Multiple-module. For a multiple-module switchbox, the RF Multiplexer
module with the lowest logical address is always card number 01. The card
number with the next successive logical address is 02, and so on. Figure 1-2
illustrates the card numbers and logical addresses of a typical
multiple-module switchbox.
The logical addresses noted in Figure 1-2 applies to RF Multiplexers installed in an
HP 75000 Series C Mainframe with an HP Command Module. See your specific
“HP Command Module Manual” for more information on switchboxes and logical
addressing. For uses in other systems or mainframes, see the appropriate manuals.
12 Getting Started Chapter 1

MULTIPLE MODULE SWITCH BOX CARD NUMBERS
Figure 1-2. Card Numbers for Multiple-Module Switchboxes
MODULE NUMBERS
Figure 1-3. Module Numbers
Chapter 1 Getting Started 13

Module Number The module number identifies the module (RF Multiplexer, Expander #1, or
Expander #2) within the card. The number depends on the desired module (RF
Multiplexer, Expander #1, or Expander #2). Figure 1-3 illustrates the module
numbers of a typical card.
•RF Multiplexer. Module number is 00. If the RF Multiplexer
does not have Expander module(s) connected, the module
number can be omitted.
•Expander module #1 . Module number is 01. Used to select
the Expander module (if installed) connected to the RF Multiplexer
RMD 3/RMD 2 internal ribbon connector.
•Expander module #2 . Module number is 02. Used to select
the Expander module (if installed) connected to the RF Multiplexer
RMD 5/RMD 4 internal ribbon connector.
Channel Number The channel numbers are 00-03,10-13,20-23,30-33, 40-43, and 50-53. The channel
is addressed using channel numbers. Use commas (,) to form a channel list. Only
valid channels can be accessed in a channel list.
Note The RF Multiplexer will accept and execute channel ranges (ccmmnn:ccmmnn)
without generating an error, but the result is to close the last channel in each bank
within the range specified. For example, after CLOSe (@010101:010151) is
executed, card 01, module 01 channels 03, 13, 23, 33, 43, and 51 would remain
closed.
Example RF Multiplexer Channel List
Channel Lists:
CLOSe (@10001) Connect channel 01 to COM 00
on the RF Multiplexer module,
card 01.
CLOSe (@10101,20101) Connect channel 01 to COM 00
on the Expander #1 module,
cards 01 and 02.
SCPI Command
Format Used in
This Manual
You can send SCPI commands in either short or long form. A long form example
is:
CLOSe (@10102)
The same command shown without the lower case letters is the short form. The
command then becomes:
CLOS (@10102)
14 Getting Started Chapter 1

Some commands in this manual are shown with brackets ([ ]). These are implied or
optional commands that you do not have to execute. For example, the ROUTe
command is an implied command and is shown in this manual as:
[ROUT:]CLOS (@10102)
Thus, to execute these commands, simply enter:
CLOS (@10102)
See Chapter 4 for more explanation about SCPI commands and how to send them.
1
Initial Operation Use the following program example to verify initial RF Multiplexer operation by
closing a channel and querying channel closure. The example first resets the
switchbox and then closes channel 02 of a single RF Multiplexer module (card
number 1) in the switchbox. The program next queries the channel closure state. A
returned "1" shows that the command to close the channel has been sent to the
switchbox. A returned " 0" shows that the command to close the channel has not
been sent to the switchbox.
The computer used in the example is an HP Series 200/300 computer withHP
BASIC as the program language. The computer interfaces to the mainframe using
the Hewlett-Packard Interface Bus (HP-IB).1The HP-IB interface select code is 7,
the HP-IB primary address is 09, and the HP-IB secondary address is 15. Refer to
the your specific “HP Command Module User’s Guide” for addressing information.
Example: Reset the switchbox and connect RF Multiplexer channel 02 to
COM 00.
10 OUTPUT 70915;"*RST" Resets the module. Switches all
channel n0 to COM n0.
20 OUTPUT 70915;"CLOS (@102)" Connect channel 02 to COM 00.
30 OUTPUT 70915;"CLOS? (@102)" Query channel 02.
40 ENTER 70915;Value Enter results into value.
50 PRINT Value Display results (should return
"1").
60 END Terminate program.
Chapter 1 Getting Started 15
1 HP-IB is Hewlett-Packard’s implementation of IEEE Std 488.1-1984

Notes
16 Getting Started Chapter 1

2
Configuring the RF Multiplexer Modules
Using This Chapter This chapter shows how to connect external wiring to the RF Multiplexer and
Expander connectors, and how to configure the module for operation. This chapter
contains the following sections:
•Warnings and Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 17
•Setting the Address Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 18
•Selecting the Interrupt Priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 19
•Expanding the RF Multiplexer . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 20
•Selecting the Relay Drive Level . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 22
•Connecting User Inputs To E1472A/73A . . . . . . . . . . . . . . . . . . . Page 23
•Connecting User Inputs To E1474A/75A . . . . . . . . . . . . . . . . . . . Page 24
•Cables and Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 27
1
Warnings and
Cautions
Warning SHOCK HAZARD. Only service-trained personnel who are aware of the
hazards involved should install, remove, or configure the RF Multiplexer.
Before you remove any installed module, disconnect AC power from the
mainframe and from other modules that may be connected to the RF
Multiplexer.
CHANNEL WIRING INSULATION. All channels that have a common
connection must be insulated so that the user is protected from electrical shock
in the event that two or more channels are connected together. This means
wiring for all channels must be insulated as though each channel carries the
voltage of the highest voltage channel.
Caution MAXIMUM POWER. The maximum power that can be applied to any SMB
connector is 24 W (24 VA). The maximum voltage that can be applied to any SMB
connector is 42 V peak. The maximum current that can be applied to any SMB
connector is 1 A DC/AC RMS.
STATIC ELECTRICITY. Static electricity is a major cause of component failure.
To prevent damage to the electrical components in the RF Multiplexer, observe
anti-static techniques whenever removing a module from the mainframe or
whenever working on a module.
Chapter 2 Configuring the RF Multiplexer 17

2
Setting the
Address Switch The logical address switch (LADDR) factory setting is 120. You may have
changed the setting during module installation. Valid address values are from 0 to
255. If the RF Multiplexer is used with an HP Command Module in a C Size
Mainframe, refer to the “HP Command Module User’s Guide” for addressing
information. Otherwise, use Figure 2-1 to change the setting.
Note The address switch selected value must be a multiple of 8 if the module is the first
module in a “switchbox” used in a VXIbus mainframe, and being instructed by
SCPI commands.
LOCATE AND SET THE LOGICAL SWITCH
Figure 2-4 Address Selection
18 Configuring the RF Multiplexer Chapter 2

1
Selecting the
Interrupt Priority The RF Multiplexer module generates an interrupt after a channel has been closed.
These interrupts are sent to, and acknowledgements are received from, the HP
Command Module via the VXIbus backplane interrupt lines.
For most applications where the RF Multiplexer module is installed in an HP 75000
Series C mainframe, the interrupt priority jumper does not have to be moved. This
is because the VXIbus interrupt lines have the same priority and interrupt priority is
established by installing modules in slots numerically closest to the Command
Module. Thus, slot 1 has a higher priority than slot 2, slot 2 has a higher priority
than slot 3, etc.
Refer to Figure 2-2 to change the interrupt priority. You can select eight different
interrupt priority levels. Level 1 is the lowest priority and Level 7 is the highest
priority. Level X disables the interrupt. The Module’s factory setting is Level 1.
To change, remove the 4-pin jumper (HP P/N 1258-0247) from the old priority
location and reinstall in the new priority location (Figure 2-2 shows a priority
change from 1 to 7). If the 4-pin jumper is not used, the two jumper locations must
have the same interrupt priority level selected (see Figure 2-2).
Note Level X interrupt priority should not be used under normal operating conditions.
Changing the priority level jumper is not recommended. Do not change unless
specifically instructed to do so.
Figure 2-5 Interrupt Priorty Selection
Chapter 2 Configuring the RF Multiplexer 19