Racal Instruments 1257 User manual

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RACAL INSTRUMENTS
1257
SWITCHING SYSTEM
PUBLICATION NO. 980862
EADS North America Defense Test and Services, Inc.
4 Goodyear, Irvine, CA 92618
Tel: [phone]; Fax: [phone]
[email protected]
[email protected]
[email protected]
http://www.eads-nadefense.com
PUBLICATION DATE: August 10, 2004
Copyright 2001 by EADS North America Defense Test and Services, Inc. Printed in the United States of America. All
rights reserved. This book or parts thereof may not be reproduced in any form without written permission of the publisher.

THANK YOU FOR PURCHASING THIS
EADS NORTH AMERICA DEFENSE TEST AND SERVICES PRODUCT
For this product, or any other EADS North America Defense Test and Services, Inc. product that incorporates
software drivers, you may access our web site to verify and/or download the latest driver versions. The web
address for driver downloads is:
http://www.eads-nadefense.com/downloads
If you have any questions about software driver downloads or our privacy policy, please contact us at:
[email protected]
WARRANTY STATEMENT
All EADS North America Defense Test and Services, Inc. products are designed and manufactured to
exacting standards and in full conformance to EADS ISO 9001:2000 processes.
This warranty does not apply to defects resulting from any modification(s) of any product or part without
EADS North America Defense Test and Services, Inc. express written consent, or misuse of any product or
part. The warranty also does not apply to fuses, software, non-rechargeable batteries, damage from battery
leakage, or problems arising from normal wear, such as mechanical relay life, or failure to follow instructions.
This warranty is in lieu of all other warranties, expressed or implied, including any implied warranty of
merchantability or fitness for a particular use. The remedies provided herein are buyer’s sole and exclusive
remedies.
For the specific terms of your standard warranty, or optional extended warranty or service agreement, contact
your EADS North America Defense Test and Services, Inc. customer service advisor. Please have the
following information available to facilitate service.
1. Product serial number
2. Product model number
3. Your company and contact information
You may contact your customer service advisor by:
E-Mail: [email protected]
Telephone: [phone] (USA)
Fax: [phone] (USA)

RETURN of PRODUCT
Authorization is required from EADS North America Defense Test and Services, Inc. before you send us your
product for service or calibration. Call or contact the Customer Support Department at 1-800-722-3262 or 1-
949-859-8999 or via fax at 1-949-859-7139. We can be reached at: [email protected].
PROPRIETARY NOTICE
This document and the technical data herein disclosed, are proprietary to EADS North America Defense Test
and Services, Inc., and shall not, without express written permission of EADS North America Defense Test
and Services, Inc., be used, in whole or in part to solicit quotations from a competitive source or used for
manufacture by anyone other than EADS North America Defense Test and Services, Inc. The information
herein has been developed at private expense, and may only be used for operation and maintenance
reference purposes or for purposes of engineering evaluation and incorporation into technical specifications
and other documents which specify procurement of products from EADS North America Defense Test and
Services, Inc.
DISCLAIMER
Buyer acknowledges and agrees that it is responsible for the operation of the goods purchased and should
ensure that they are used properly and in accordance with this handbook and any other instructions provided
by Seller. EADS North America Defense Test and Services, Inc. products are not specifically designed,
manufactured or intended to be used as parts, assemblies or components in planning, construction,
maintenance or operation of a nuclear facility, or in life support or safety critical applications in which the
failure of the EADS North America Defense Test and Services, Inc. product could create a situation where
personal injury or death could occur. Should Buyer purchase EADS North America Defense Test and
Services, Inc. product for such unintended application, Buyer shall indemnify and hold EADS North America
Defense Test and Services, Inc., its officers, employees, subsidiaries, affiliates and distributors harmless
against all claims arising out of a claim for personal injury or death associated with such unintended use.

FOR YOUR SAFETY
Before undertaking any troubleshooting, maintenance or exploratory procedure, read carefully the
WARNINGS and CAUTION notices.
This equipment contains voltage hazardous to human
life and safety, and is capable of inflicting personal
injury.
If this instrument is to be powered from the AC line (mains) through an
autotransformer, ensure the common connector is connected to the neutral (earth
pole) of the power supply.
Before operating the unit, ensure the conductor (green wire) is connected to the
ground (earth) conductor of the power outlet. Do not use a two-conductor extension
cord or a three-prong/two-prong adapter. This will defeat the protective feature of
the third conductor in the power cord.
Maintenance and calibration procedures sometimes call for operation of the unit with
power applied and protective covers removed. Read the procedures and heed
warnings to avoid “live” circuit points.
Before operating this instrument:
1. Ensure the proper fuse is in place for the power source to operate.
2. Ensure all other devices connected to or in proximity to this instrument are properly grounded or
connected to the protective third-wire earth ground.
If the instrument:
- fails to operate satisfactorily
- shows visible damage
- has been stored under unfavorable conditions
- has sustained stress
Do not operate until, performance is checked by qualified personnel.

This page was left intentionally blank.

1257 User Manual
i
Table of Contents
Chapter 1..............................................................................................................................1-1
INTRODUCTION ............................................................................................................................1-1
Overview ......................................................................................................................................1-1
Features....................................................................................................................................1-2
Ease Of Use..........................................................................................................................1-2
Front and Rear Panels..........................................................................................................1-3
Powerful Software.................................................................................................................1-6
Items Shipped with the 1257........................................................................................................1-8
Chapter 2..............................................................................................................................2-1
GETTING STARTED......................................................................................................................2-1
Mounting Options.........................................................................................................................2-1
Main AC Power ............................................................................................................................2-1
Installing the Drawer.....................................................................................................................2-3
Connecting to the Drawer.........................................................................................................2-3
Activating Main AC Power............................................................................................................2-4
Self-Test.......................................................................................................................................2-4
Verifying the Installed Drawer...................................................................................................2-5
Closing a Relay.........................................................................................................................2-5
Opening a Relay.......................................................................................................................2-6
In Case of Trouble....................................................................................................................2-6
Switching and Heat Dissipation................................................................................................2-7

1257 User Manual
ii
Chapter 3..............................................................................................................................3-1
USING THE FRONT PANEL CONTROLS.....................................................................................3-1
Introduction ..................................................................................................................................3-1
Front Panel...................................................................................................................................3-2
Understanding the Hierarchical Menu..........................................................................................3-2
The Five Menus........................................................................................................................3-6
Operations Menu...................................................................................................................3-7
Path Control Menu................................................................................................................3-9
Closing a Path.................................................................................................................3-10
Settings Menu.....................................................................................................................3-13
Store/Recall Menu...............................................................................................................3-20
System Menu......................................................................................................................3-23
Complete Menu Listing...........................................................................................................3-24
Chapter 4..............................................................................................................................4-1
COMPUTER INTERFACES ...........................................................................................................4-1
Introduction ..................................................................................................................................4-1
Commands...................................................................................................................................4-1
Using the Ethernet Interface.....................................................................................................4-2
Basic Ethernet Information....................................................................................................4-2
Ethernet Cabling Guidelines .................................................................................................4-2
Connecting the Ethernet Cables...........................................................................................4-3
Selecting the Ethernet Interface............................................................................................4-3
Entering the Ethernet Communication Settings....................................................................4-4
Using the IEEE-488 (GPIB) Interface.....................................................................................4-10
Basic GPIB Information.......................................................................................................4-10

1257 User Manual
iii
GPIB Cabling Guidelines ....................................................................................................4-10
Connecting the GPIB Cables..............................................................................................4-11
Selecting the GPIB Interface...............................................................................................4-11
Setting the GPIB Address...................................................................................................4-12
Service Request (SRQ).......................................................................................................4-13
Using the RS-232 Interface ....................................................................................................4-14
Basic RS-232 Information...................................................................................................4-14
Equipment Required ...........................................................................................................4-14
DTE Versus DCE.............................................................................................................4-14
Connecting to a Computer or Data Terminal ......................................................................4-14
Connecting to a Modem......................................................................................................4-15
Selecting the RS-232 Interface...........................................................................................4-17
Setting the Flow Control Option..........................................................................................4-18
Setting the Baud Rate.........................................................................................................4-20
Setting the Message Termination Characters.....................................................................4-21
Setting the Data Bits, Stop Bits, and Parity.........................................................................4-22
Using Microsoft HyperTerminal...........................................................................................4-24
Chapter 5..............................................................................................................................5-1
SCPI COMMAND BASICS .............................................................................................................5-1
SCPI Command Overview............................................................................................................5-1
Input Format .............................................................................................................................5-1
Command Keyword Long Form and Short Form......................................................................5-3
Case Sensitivity.....................................................................................................................5-3
Optional Keywords................................................................................................................5-4
Querying Parameter Setting..................................................................................................5-4
SCPI Command Terminator..................................................................................................5-4