Agilent Technologies E1472A User manual

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Agilent Technologies
E1472A/73A/74A/75A
50 Ohm and 75 Ohm
RF Multiplexers/Expanders
User’s Manual
*E1472-90003*
Manual Part Number: E1472-90003
Printed in U.S.A. E1100
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3
Contents
E1472A/73A/74A/75A RF Multiplexers User’s Manual
AGILENT TECHNOLOGIES WARRANTY STATEMENT ............................................5
Safety Symbols............................................................................................................6
WARNINGS .................................................................................................................6
Chapter 1
Getting Started ..............................................................................................................9
Using This Chapter ......................................................................................................9
How to Use this Manual...............................................................................................9
RF Multiplexers Description.......................................................................................10
General Description ............................................................................................11
Basic Operation ..................................................................................................11
Typical Configuration ..........................................................................................12
Instrument Definition ...........................................................................................12
Programming the RF Multiplexers..............................................................................13
Addressing the Multiplexers ...............................................................................13
Initial Operation ..................................................................................................16
Chapter 2
Configuring the RF Multiplexers ...............................................................................17
Using This Chapter ....................................................................................................17
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/E1473A..............................................................24
Cabling Guidelines .............................................................................................24
Connecting User Inputs to E1474A/E1475A..............................................................25
Cabling Guidelines .............................................................................................25
Cables and Connectors .............................................................................................28
Cables ................................................................................................................28
Connectors .........................................................................................................29
Chapter 3
Using the RF Multiplexers ..........................................................................................31
Using This Chapter ....................................................................................................31
RF Multiplexer Commands.........................................................................................31
Switching Channels ...................................................................................................32
Saving and Recalling States ......................................................................................34
Detecting Error Conditions.........................................................................................34
Synchronizing the RF Multiplexer ..............................................................................36
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4
Chapter 4
RF Multiplexer Command Reference ........................................................................37
Using This Chapter ....................................................................................................37
Command Types........................................................................................................37
Common Command Format ...............................................................................37
SCPI Command Format .....................................................................................37
SCPI Command Reference........................................................................................39
[ROUTe:] ....................................................................................................................40
[ROUTe:]CLOSe .................................................................................................40
[ROUTe:]CLOSe? ...............................................................................................41
[ROUTe:]OPEN? .................................................................................................41
SYSTem.....................................................................................................................43
SYSTem:CDEScription? .....................................................................................43
SYSTem:COPTion? ............................................................................................43
SYSTem:CPON ..................................................................................................44
SYSTem:CTYPe? ...............................................................................................44
SYSTem:ERRor? ................................................................................................45
Common Commands Quick Reference .....................................................................46
SCPI Commands Quick Reference............................................................................47
Appendix A
RF Multiplexer Specifications ....................................................................................49
Appendix B
Register-Based Programming ...................................................................................51
About This Appendix..................................................................................................51
Addressing the Registers...........................................................................................51
Reading the Registers ...............................................................................................52
Manufacturer ID Register ...................................................................................52
Device Type Register .........................................................................................52
Status/Control Register .......................................................................................52
Remote Module ID Registers .............................................................................53
Channel Enable Registers ..................................................................................53
Writing to the Registers..............................................................................................53
Status/Control Register .......................................................................................53
Channel Enable Registers ..................................................................................54
Selecting Channels Using Your Own Relays .............................................................57
Appendix C
RF Multiplexer Error Messages .................................................................................61
Appendix D
Relay Life .....................................................................................................................63
Replacement Strategy................................................................................................63
Relay Life Factors......................................................................................................63
End-of-Life Determination..........................................................................................63
Index................................................................................................................................65
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5
AGILENT TECHNOLOGIES WARRANTY STATEMENT
AGILENT PRODUCT: E1472A/73A/74A/75A RF Multiplexers DURATION OF WARRANTY: 3years
1. Agilent Technologies warrants Agilent hardware, accessories and supplies against defects in materials and workmanship for the period
specified above. If Agilent receives notice of such defects during the warranty period, Agilent will, at its option, either repair or replace
products which prove to be defective. Replacement products may be either new or like-new.
2. Agilent warrants that Agilent software will not fail to execute its programming instructions, for the period specified above, due to
defects in material and workmanship when properly installed and used. If Agilent receives notice of such defects during the warranty
period, Agilent will replace software media which does not execute its programming instructions due to such defects.
3. Agilent doesnot warrant thatthe operation ofAgilent products willbe interrupted or error free. If Agilentis unable, within a reasonable
time, to repair or replace any product to a condition as warranted, customer will be entitled to a refund of the purchase price upon prompt
return of the product.
4. Agilent products may contain remanufactured parts equivalent to new in performance or may have been subject to incidental use.
5. Thewarranty period begins on thedate of delivery or on the date of installation if installedby Agilent. If customerschedules or delays
Agilent installation more than 30 days after delivery, warranty begins on the 31st day from delivery.
6. Warranty does notapply to defects resulting from (a)improper or inadequatemaintenance orcalibration, (b) software,interfacing, parts
or supplies not supplied by Agilent, (c) unauthorized modification or misuse, (d) operation outside of the published environmental
specifications for the product, or (e) improper site preparation or maintenance.
7. TO THE EXTENT ALLOWED BY LOCAL LAW, THE ABOVE WARRANTIES ARE EXCLUSIVE AND NO OTHER
WARRANTY OR CONDITION, WHETHER WRITTEN OR ORAL, IS EXPRESSED OR IMPLIED AND AGILENT
SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OR CONDITIONS OF MERCHANTABILITY, SATISFACTORY
QUALITY, AND FITNESS FOR A PARTICULAR PURPOSE.
8. Agilent will be liable for damage totangible property per incident up to the greater of $300,000 or the actualamountpaid for theproduct
that is the subject of the claim, and for damages for bodily injury or death, to the extent that all such damages are determined by a court
of competent jurisdiction to have been directly caused by a defective Agilent product.
9. TO THE EXTENT ALLOWED BY LOCAL LAW, THE REMEDIES IN THIS WARRANTY STATEMENT ARE CUSTOMER’S
SOLE AND EXLUSIVE REMEDIES. EXCEPT AS INDICATED ABOVE, IN NO EVENT WILL AGILENT OR ITS SUPPLIERS BE
LIABLE FOR LOSS OF DATA OR FOR DIRECT, SPECIAL, INCIDENTAL, CONSEQUENTIAL (INCLUDING LOST PROFIT OR
DATA), OR OTHER DAMAGE, WHETHER BASED IN CONTRACT, TORT, OR OTHERWISE.
FOR CONSUMER TRANSACTIONS IN AUSTRALIA AND NEW ZEALAND: THE WARRANTY TERMS CONTAINED IN THIS
STATEMENT, EXCEPT TO THE EXTENT LAWFULLY PERMITTED, DO NOT EXCLUDE, RESTRICT OR MODIFY AND ARE
IN ADDITION TO THE MANDATORY STATUTORY RIGHTS APPLICABLE TO THE SALE OF THIS PRODUCT TO YOU.
U.S. Government Restricted Rights
The Software and Documentation have been developed entirely at private expense. They are delivered and licensed as "commercial
computer software" as defined in DFARS 252.227- 7013 (Oct 1988), DFARS 252.211-7015 (May 1991) or DFARS 252.227-7014 (Jun
1995), as a "commercial item" as defined in FAR 2.101(a), or as "Restricted computer 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
Software and Documentation by the applicable FAR or DFARS clause or the Agilent standard software agreement for the product
involved.
E1472A/73A/74A/75A RF Multiplexers User’s Manual
Edition 4
Copyright © 1990-1992, 2000 Agilent Technologies, Inc. All rights reserved.
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6
Safety Symbols
Instruction manual symbol affixed to
product. Indicates that the user must refer to
the manual for specific WARNING or
CAUTION information to avoid personal
injury or damage to the product.
Alternating current (AC)
Instruction manual symbol affixed to
product. Indicates that the user must refer to
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.
Direct current (DC).
Warning. Risk of electrical shock.
or Frameorchassisgroundterminal—typically
connects to the equipment's metal frame.
WARNING Calls attention to a procedure, practice, or
condition that could cause bodily injury or
death.
CAUTION Calls attention to a procedure, practice, or
conditionthatcouldpossiblycausedamageto
equipment or permanent loss of data.
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. Agilent Technologies 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
impaired, either through physical damage, excessive moisture, or any other reason, REMOVE POWER and do not use the product until
safe operation canbe verified by service-trained personnel. If necessary,return theproduct to Agilentfor service and repairto ensure that
safety features are maintained.
DO NOT service or adjust alone: Do not attempt internal serviceor 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 performany unauthorized modification to the product. Return the product to Agilent for service and repair to ensure that safety features
are maintained.
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 Edition
number increments by 1 whenever the manual is revised. Updates, which are issued between Editions, contain replacement pages to
correct or add additional information to the current Edition of the manual. Whenever a new Edition is created, it will contain all of the
Update information for the previous Edition. Each new Edition or Update also includes a revised copy of this documentation history page.
Edition1 ............................................January, 1990
Edition2 ............................................October,1991
Edition3 ..........................................November,1992
Edition4 ..........................................November,2000
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7
Manufacturer’s Name: Agilent Technologies, Inc.
Manufacturer’s Address: Measurement Products Unit
815 14th Street S.W.
Loveland, CO 80537 USA
Declares, that the product
Product Name: 50 Ohm and 75 Ohm RF Multiplexers/Expanders
Model Number: E1472A/73A/74A/75A
Product Options: This declaration includes all options of the above product(s).
Conforms with the following European Directives:
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.
Conforms with the following product standards:
EMC Standard Limit
IEC 61326-1:1997 + A1:1998 / EN 61326-1:1997 + A1:1998
CISPR 11:1997 + A1:1997 / EN 55011-1991 Group 1, Class A [1]
IEC 61000-4-2:1995+A1998 / EN 61000-4-2:1995 4 kV CD, 8 kV AD
IEC 61000-4-3:1995 / EN 61000-4-3:1995 3 V/m, 80-1000 MHz
IEC 61000-4-4:1995 / EN 61000-4-4:1995 0.5 kV signal lines, 1 kV power lines
IEC 61000-4-5:1995 / EN 61000-4-5:1995 0.5 kV line-line, 1 kV line-ground
IEC 61000-4-6:1996 / EN 61000-4-6:1996 3 V, 0.15-80 MHz
IEC 61000-4-11:1994 / EN 61000-4-11:1994 1 cycle, 100%
Canada: ICES-001:1998
Australia/New Zealand: AS/NZS 2064.1
Safety IEC 61010-1:1990+A1:1992+A2:1995 / EN 61010-1:1993+A2:1995
Canada: CSA C22.2 No. 1010.1:1992
UL 3111-1
Supplemental Information:
[1] The product was tested in a typical configuration with Agilent Technologies test systems.
For further information, please contact your local Agilent Technologies sales office, agent or distributor.
Authorized EU-representative: Agilent Technologies Duetschland GmbH, Herrenberger Strase 130, D 71034 Boblingen, Germany
Revision: A.03 Issue Date: 09/05/00
September 5, 2000
Date Name
Quality Manager
Title
DECLARATION OF CONFORMITY
According to ISO/IEC Guide 22 and CEN/CENELEC EN 45014
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8
Notes:
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Getting Started 9
Chapter 1
Chapter 1
Getting Started
Using This Chapter
This chapter describes the RF Multiplexer and Expander modules and
contains information on how to program them using Standard Commands
for Programmable Instruments (SCPI). This chapter contains the following
sections:
•How to Use This Manual...............................9
•RFMultiplexersDescription...........................10
•ProgrammingtheRFMultiplexers......................13
How to Use this Manual
This manual shows how to operate, configure, and program the E1472A
50 Ohm RF Multiplexer, E1473A 50 Ohm RF Multiplexer Expander, E1474A
75 Ohm RF Multiplexer, and E1475A 75 Ohm 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 a command
module such as the E1406. For other manufacturers’ mainframes, refer to
the applicable manual supplied by the manufacturer.
NOTE Except where noted, the term “RF Multiplexer” refers to the E1472A
50 Ohm RF Multiplexer and E1474A 75 Ohm RF Multiplexer Modules.
The term “Expander” refers to the E1473A 50 Ohm RF Multiplexer
Expander, and E1475A 75 Ohm RF Multiplexer Expander Modules.
Most information in this manual applies to RF Multiplexer operations in a
command module. Standard Commands for Programmable Instruments
(SCPI) is the programming language. For non-SCPI programming, see
Appendix B for register-based programming.
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10 Getting Started Chapter 1
RF Multiplexers Description
Figure 1-1 shows the 50 Ohm and 75 Ohm RF Multiplexer and 50 Ohm and
75Ohm RFMultiplexerExpandermodulesswitchingdiagram.Duringpower
off, power on and reset, channel 0 is connected to COM on each bank.
Figure 1-1. RF Multiplexers/Expanders Switching Diagram
E1472A
03
02
COM 00
01
00
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Getting Started 11
Chapter 1
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 VXI
mainframe using a command module such as an 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 E1475A Expander or E1473A Expander to the E1472A or
E1474A Multiplexer. The drivers on both modules can support either of the
expander relay modules.
Basic Operation The RF Multiplexer modules and 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.
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 toitscommon)byclosingtheappropriate(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 channelis 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.
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12 Getting Started Chapter 1
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 (42V peak). User input
frequencies to the 50 Ohm RF Multiplexer and Expander modules can be
from DC to 3 GHz. User input frequencies to the 75 Ohm 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 4 for more information).
For a Standard Commands for Programmable Instruments (SCPI)
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.
Instrument
Definition Plug-in modules installed in a mainframe or used with a command module
are treated as independent instruments each having a unique secondary
GPIB 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).
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Getting Started 13
Chapter 1
Programming the RF Multiplexers
To program the RF Multiplexers using SCPI, you must select the controller
language, interface address,and SCPI commands tobeused. Guidelines to
select SCPI commands for the RF Multiplexers follow. See the specific
command module manual for interface addressing and controller language
information.
NOTE This discussion applies to SCPI programming. See Appendix B for details
on programming RF Multiplexer registers.
Addressing the
Multiplexers 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 to
which it is connected.
•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, etc.
Figure 1-2 illustrates the card numbers and logical addresses of a typical
multiple-module switchbox. The logical addresses in Figure 1-2 apply to RF
Multiplexers installed in aVXI mainframe with a command module. See your
specific command module manual for more information on switchboxes and
logical addressing. For uses in other systems or mainframes, see the
appropriate manuals.
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14 Getting Started Chapter 1
Figure 1-2. Card Numbers for Multiple-Module Switches
Module Numbers 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.
RF Multiplexer Module
but is recommended.
Logical Address Order is not required,
Physical placement of the Module in the
RF Multiplexer Module
Logical Address 121
NOTE:
Secondary Address 15
Logical Address 128
Command Module
CARD NUMBER 02
CARD NUMBER 01
Secondary Address 15
Logical Address 120
RF Multiplexer Module
Multiple Module Switch Box Card Numbers
CARD NUMBER 09
CARD NUMBER 08
Logical Address 127
RF Multiplexer Module
Figure 1-3. Typical Module Numbers
Command Module
RF Multiplexer Module
CARD NUMBER 01 MODULE #00
CARD NUMBER 01 MODULE #01
Expander Module #01
Physical placement of the Module in the
Logical Address Order is not required,
but is recommended.
NOTE:
Module Numbers
CARD NUMBER 01 MODULE #2
Expander Module #02
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Getting Started 15
Chapter 1
Channel Numbers 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 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)
Some commands are shown with brackets ([ ]). These are implied or
optional commands you do not have to execute. For example, the
ROUTe
command is an implied command and is shown as:
[ROUT:]CLOS (@10102)
Thus, to execute these commands, enter:
CLOS (@10102)
See Chapter 3 formore information about SCPI commands and how to send
them.
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16 Getting Started Chapter 1
Initial Operation You can 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.
This example uses BASIC as the program language. The computer
interfaces to the mainframe using GPIB. The GPIB interface select code is
7, the primary address is 09, and the secondary address is 15. See the
specific command module user’s guide for addressing information.
10 OUTPUT 70915;"*RST"
!Resetsthemodule.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; alue
!Enter results into value.
50 PRI NT alue
!Display results (should
return "1").
60 END
!End program.
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Configuring the RF Multiplexers 17
Chapter 2
Chapter 2
Configuring the RF Multiplexers
Using This Chapter
This chapter shows how to connect external wiring tothe RF Multiplexer and
Expander connectors and how to configure the modules for operation.
•WarningsandCautions ............................. 17
•SettingtheAddressSwitch .......................... 18
•SelectingtheInterruptPriority ........................ 19
•Expanding the RF Multiplexer . . ...................... 20
•SelectingtheRelayDriveLevel....................... 22
•Connecting User Inputs to E1472A/73A ................ 24
•Connecting User Inputs to E1474A/75A ................ 25
•CablesandConnectors............................. 28
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 42V peak. The maximum current that can be
applied to any SMB connector is 1A 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.
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18 Configuring the RF Multiplexers Chapter 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 a command module in a
C-Size mainframe, see the command module user’s guide for addressing
information. Otherwise, see 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 VXI mainframe, and is being
instructed by SCPI commands.
Figure 2-1. Address Selection
128
4
1
2
32
8
16
64
8+16+32+64=120
Logical Address
Switch Location
OFF ON
VALUE
DECIMAL
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Configuring the RF Multiplexers 19
Chapter 2
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 command module via the VXIbus backplane interrupt lines.
For most applications where the RF Multiplexer module is installed in a
C-Size 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.
See 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 (part number 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 2-2. Interrupt Priority Selection
IRQ
IRQ
3
X
1
2
6
4
5
7
3
X
2
1
6
5
4
7
Using 4-Pin
Jumper or Shorts
Using 2-Pin Jumper
Priority
Selection
Interrupt
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