Agilent Technologies 355C Manuale di servizio
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Agilent Technologies
355C, D, E, F
VHF Attenuators
Operating and Service
Manual
Agilent Part Number: 00355-90051
Printed in USA
April 2002
Supersedes: November 2001
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ii VHF Attenuators Operating and Service Manual
Notice
The information contained in this document is subject to change without
notice.
Agilent Technologies makes no warranty of any kind with regard to this
material, including, but not limited to, the implied warranties of
merchantability and fitness for a particular purpose. Agilent Technologies
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.
Agilent Technologies assumes no responsibility for the use or reliability of
its software on equipment that is not furnished by Agilent Technologies.
This document contains proprietary information which is protected by
copyright. All rights are reserved. No part of this document may be
photocopied, reproduced, or translated to another language without prior
written consent of Agilent Technologies.
Restricted Rights Legend
Use, duplication, or disclosure by the U.S. Government is subject to
restrictions as set forth in subparagraph (c)(1)(ii) of the Rights in Technical
Data and Computer Software clause at DFARS 252.227-7013 for DOD
agencies, and subparagraphs (c)(1) and (c)(2) of the Commercial Computer
Software Restricted Rights clause at FAR 52.227-19 for other agencies.
Serial Number Prefix
The specifications in this manual apply to the instruments with the following
serial numbers or greater:
© Copyright 1997, 2001, 2002 Agilent Technologies, Inc
Model Serial Numbers (min.)
355C 2524A44630
355D 2522A46649
355E 1205A38159
355F 1203A03244
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VHF Attenuators Operating and Service Manual iii
What You’ll Find in This Manual…
This operating and service manual contains the following:
•Instrument Description and Specifications
•Replaceable Parts and Accessories
•Installation Instructions
•Operating Instructions
•Schematics and Diagrams
Warranty
Custom systems are warranted by contractual agreement between Agilent
Technologies and the Customer.
Certification Agilent Technologies certifies that this product met its published specifications at the time of
shipment from the factory.
Documentation
Warranty THE MATERIAL CONTAINED IN THIS DOCUMENT IS
PROVIDED "AS IS," AND IS SUBJECT TO BEING CHANGED,
WITHOUT NOTICE, IN FUTURE EDITIONS. FURTHER, TO
THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW,
AGILENT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS
OR IMPLIED WITH REGARD TO THIS MANUAL AND ANY
INFORMATION CONTAINED HEREIN, INCLUDING BUT NOT
LIMITED TO THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. AGILENT SHALL NOT BE LIABLE FOR ERRORS
OR FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES IN
CONNECTION WITH THE FURNISHING, USE, OR
PERFORMANCE OF THIS DOCUMENT OR ANY
INFORMATION CONTAINED HEREIN. SHOULD AGILENT
AND THE USER HAVE A SEPARATE WRITTEN AGREEMENT
WITH WARRANTY TERMS COVERING THE MATERIAL IN
THIS DOCUMENT THAT CONFLICT WITH THESE TERMS,
THE WARRANTY TERMS IN THE SEPARATE AGREEMENT
WILL CONTROL.
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iv VHF Attenuators Operating and Service Manual
Assistance Product maintenance agreements and other customer assistance agreements
are available for Agilent Technologies products.
For assistance, call your local Agilent Technologies Sales and Service Office
(refer to “Support and Service”).
Support and Service
Any adjustment, maintenance, or repair of this product must be performed
by qualified personnel. contact your local Agilent Technologies sales and
service office.
Online assistance: www.agilent.com/find/assist
United States
(tel) 1 800 452 4844 Latin America
(tel) (305) 269 7500
(fax) (305) 269 7599
Canada
(tel) 1 877 894 4414
(fax) (905) 282-6495
New Zealand
(tel) 0 800 738 378
(fax) (+64) 4 495 8950
Japan
(tel) (+81) 426 56 7832
(fax) (+81) 426 56 7840
Australia
(tel) 1 800 629 485
(fax) (+61) 3 9210 5947
Malaysia
(tel) 1 800 828 848
(fax) 1 800 801 664
Philippines
(tel) (632) 8426802
(tel) (PLDT subscriber only):
1 800 16510170
(fax) (632) 8426809
(fax) (PLDT subscriber only):
1 800 16510288
Thailand
(tel) outside Bangkok:
(088) 226 008
(tel) within Bangkok:
(662) 661 3999
(fax) (66) 1 661 3714
Taiwan
(tel) 0800-047-866
(fax) (886) 2 25456723
People’s Republic of China
(tel) (preferred): 800-810-0189
(tel) (alternate):
10800-650-0021
(fax) 10800-650-0121
India
(tel) 1-600-11-2929
(fax) 000-800-650-1101
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VHF Attenuators Operating and Service Manual v
Safety and Regulatory Information
Review this product and related documentation to familiarize yourself with
safety markings and instructions before you operate the instrument This
product has been designed and tested in accordance with international
standards.
WARNING The WARNING notice denotes a hazard. It calls attention to a procedure,
practice, or the like, that, if not correctly performed or adhered to, could result
in personal injury. Do not proceed beyond a WARNING notice until the
indicated conditions are fully understood and met.
CAUTION The CAUTION notice denotes a hazard. It calls attention to an operating
procedure, practice, or the like, which, if not correctly performed or adhered
to, could result in damage to the product or loss of important data. Do not
proceed beyond a CAUTION notice until the indicated conditions are fully
understood and met.
Instrument Markings
When you see this symbol on your instrument, you should refer to the instrument’s
instruction manual for important information.
This symbol indicates hazardous voltages.
The laser radiation symbol is marked on products that have a laser output.
This symbol indicates that the instrument requires alternating current (ac) input.
The CE mark is a registered trademark of the European Community. If it is
accompanied by a year, it indicates the year the design was proven.
The CSA mark is a registered trademark of the Canadian Standards Association.
1SM1-A This text indicates that the instruments an Industrial Scientific and Medical Group 1
Class A product (CISPER 11, Clause 4).
This ISM device complies with Canadian ICES-001.
Cet appareil ISM est conforme a la norme NMB du Canada.
This symbol indicates that the power line switch is ON.
This symbol indicates that the power line switch is OFF or in STANDBY position.
!
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vi VHF Attenuators Operating and Service Manual
Safety Earth
Ground This is a Safety Class I product (provided with a protective earthing
terminal). An uninterruptible safety earth ground must be provided from the
main power source to the product input wiring terminals, power cord, or
supplied power cord set. Whenever it is likely that the protection has been
impaired, the product must be made inoperative and secured against any
unintended operation.
Before Applying Power Verify that the product is configured to match the available main power
source as described in the input power configuration instructions in this
manual. If this product is to be powered by autotransformer, make sure the
common terminal is connected to the neutral (grounded) side of the ac power
supply.
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VHF Attenuators Operating and Service Manual vii
Typeface Conventions
Italics •Used to emphasize important information:
Use this software only with the xxxxxX system.
•Used for the title of a publication:
Refer to the xxxxxX System-Level User’s Guide.
•Used to indicate a variable:
Type LOAD BIN filename.
Instrument Display •Used to show on-screen prompts and messages that you will see on the
display of an instrument:
The xxxxxX will display the message CAL1 SAVED.
[Keycap] •Used for labeled keys on the front panel of an instrument or on a
computer keyboard:
Press [Return].
{Softkey} •Used for simulated keys that appear on an instrument display:
Press {Prior Menu}.
User Entry •Used to indicate text that you will enter using the computer keyboard;
text shown in this typeface must be typed exactly as printed:
Type LOAD PARMFILE
•Used for examples of programming code:
#endif // ifndef NO_CLASS
Path Name
•Used for a subdirectory name or file path:
Edit the file
usr/local/bin/sample.txt
Computer Display •Used to show messages, prompts, and window labels that appear on a
computer monitor:
The Edit Parameters window will appear on the screen.
•Used for menus, lists, dialog boxes, and button boxes on a computer
monitor from which you make selections using the mouse or keyboard:
Double-click EXIT to quit the program.
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viii VHF Attenuators Operating and Service Manual
Typeface Conventions
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VHF Attenuators Operating and Service Manual 1
General Information
General Information
This manual contains operating instructions for 355C, 355D, 355E, and
355F VHF Attenuators. Included in the manual is the information required
to install and test these attenuators.
Description The Agilent Technologies Model 355C, 355D, 355E, and 355F attenuators
are 50-ohm, coaxial step attenuators usable from dc to 1 GHz. Models 355C
and 355E provide 0 to 12 dB of attenuation in 1 dB steps.
Models 355D and 355F provide 0 to 120 dB of attenuation in 10 dB steps.
The 355C and 355D are manual attenuators. The 355E and 355F are
programmable. The schematic for the Model 355C/D is shown in Figure 1,
and that of the Model 355E/F in Figure 2.
The attenuator sections consist of resistor pi networks which are switched in
or bypassed by microswitches. In the 355C and 355D, the microswitches
are actuated by cams (see Figure 1). In the 355E and 355F, the
microswitches are actuated by solenoids (see Figure 2). The standard RF
connectors are BNC type.
In the 355E and 355F, power must be continuously applied to the solenoid to
actuate the microswitch (i.e., to insert an attenuator section). Each solenoid
draws approximately 0.lA at 15 Vdc.
Dimensions for the individual instruments are provided in Table 1,
“Dimensions,” on page 2.
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