Tabor Electronics 9250 User manual

User Manual
Model 9250
Dual Channel/Differential
Power Amplifier
Publication No. 041210
Tabor Electronics Ltd.
Tabor Electronics Ltd.
P.O. Box 404, Tel Hanan Israel 20302
Tel: [phone], FAX: [phone]
PUBLICATION DATE: December 10, 2004
Copyright 2003 by Tabor Electronics Ltd. Printed in Israel. All rights reserved. This book or parts thereof may
not be reproduced in any form without written permission of the publisher.

WARRANTY STATEMENT
Products sold by Tabor Electronics Ltd. are warranted to be free from defects in workmanship or materials.
Tabor Electronics Ltd. will, at its option, either repair or replace any hardware products which prove to be de-
fective during the warranty period. You are a valued customer. Our mission is to make any necessary repairs
in a reliable and timely manner.
Duration of Warranty
The warranty period for this Tabor Electronics Ltd. hardware is three years, except software and firmware
products designed for use with Tabor Electronics Ltd. Hardware is warranted not to fail to execute its pro-
gramming instructions due to defect in materials or workmanship for a period of ninety (90) days from the
date of delivery to the initial end user.
Return of Product
Authorization is required from Tabor Electronics before you send us your product for service or calibration.
Call your nearest Tabor Electronics support facility. A list is located on the last page of this manual. If you are
unsure where to call, contact Tabor Electronics Ltd. Tel Hanan, Israel at 972-4-821-3393 or via fax at 972-4-
821-3388. We can be reached at: [email protected].
Limitation of Warranty
Tabor Electronics Ltd. shall be released from all obligations under this warranty in the event repairs or modifi-
cations are made by persons other than authorized Tabor Electronics service personnel or without the written
consent of Tabor Electronics.
Tabor Electronics Ltd. expressly disclaims any liability to its customers, dealers and representatives and to
users of its product, and to any other person or persons, for special or consequential damages of any kind
and from any cause whatsoever arising out of or in any way connected with the manufacture, sale, handling,
repair, maintenance, replacement or use of said products.
Representations and warranties made by any person including dealers and representatives of Tabor Elec-
tronics Ltd., which are inconsistent or in conflict with the terms of this warranty (including but not limited to the
limitations of the liability of Tabor Electronics Ltd. as set forth above), shall not be binding upon Tabor Elec-
tronics Ltd. unless reduced to writing and approved by an officer of Tabor Electronics Ltd.
Except as stated above, Tabor Electronics Ltd. makes no warranty, express or implied (either in fact or by
operation of law), statutory or otherwise; and except to the extent stated above, Tabor Electronics Ltd. shall
have no liability under any warranty, express or implied (either in fact or by operation of law), statutory or oth-
erwise.
PROPRIETARY NOTICE
This document and the technical data herein disclosed, are proprietary to Tabor Electronics, and shall not, without express
written permission of Tabor Electronics, be used, in whole or in part to solicit quotations from a competitive source or used
for manufacture by anyone other than Tabor Electronics. 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 Tabor Elec-
tronics.

FOR YOUR SAFETY
Before undertaking any troubleshooting, maintenance or exploratory procedure, read care-
fully 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 auto-
transformer, 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 pro-
tective 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.

DECLARATION OF CONFORMITY
We: Tabor Electronics Ltd.
9 Hatasia Street, Tel Hanan
ISRAEL 36888
declare, that the 40Vp-p Signal Amplifier
Model 9250
meet the intent of Directive 89/336/EEC for Electromagnetic Compatibility and the
requirements of the Low Voltage Directive 73/23/EEC amended by 93/68/EEC.
Compliance was demonstrated to the following specifications as listed in the official
Journal of the European Communities:
Safety:
IEC/EN 61010-1 2nd Edition:2001+ C1, C2
EMC:
EN 50081-1 Emissions:
EN 55022 - Radiated, Class B
EN 55022 - Conducted, Class B
EN 50082-1 Immunity:
IEC 801-2 (1991) - Electrostatic Discharge
IEC 801-3 / ENV50140 (1993) - RF Radiated
IEC 801-4 (1991) - Fast Transients
The tests were performed on a typical configuration.

Table of Contents
Chapter 1 - PORTRAYAL
What’s in This Chapter .........................................................................................................................................1-1
Introduction.............................................................................................................................................................1-2
9250Feature Highlights ........................................................................................................................................1-3
Conventions Used in this Manual .......................................................................................................................1-3
Functional ...............................................................................................................................................................1-4
Description..............................................................................................................................................................1-4
Configuration Options ...........................................................................................................................................1-4
Specifications .........................................................................................................................................................1-5
Front Panel.............................................................................................................................................................1-5
Connectors .............................................................................................................................................................1-5
Channel 1 Input .....................................................................................................................................................1-5
Channel 2 Input .....................................................................................................................................................1-6
Channel 1 Output ..................................................................................................................................................1-6
Channel 2 Output ..................................................................................................................................................1-7
Front Panel.............................................................................................................................................................1-8
Indicators ................................................................................................................................................................1-8
Rear Panel Parts and Connectors ......................................................................................................................1-8
Line Receptacle and Fuse ...................................................................................................................................1-9
Auxiliary Inputs Channel 1 ...................................................................................................................................1-9
Auxiliary Inputs Channel 2 .................................................................................................................................1-10
Differential Outputs Switch.................................................................................................................................1-10
Grounding Considerations .................................................................................................................................1-10
Operating ..............................................................................................................................................................1-11
Instructions ...........................................................................................................................................................1-11
Chapter 2 - INSTALLATION
Installation Overview.............................................................................................................................................2-1
Unpacking and Initial Inspection .........................................................................................................................2-1
Safety Precautions ................................................................................................................................................2-2
Performance Checks ............................................................................................................................................2-3
Operating Environment.........................................................................................................................................2-3
Power Requirements ............................................................................................................................................2-3
Grounding Requirements .....................................................................................................................................2-4
Long Term Storage or Repackaging for Shipment ..........................................................................................2-4
Preparation for Use ...............................................................................................................................................2-5
Installation...............................................................................................................................................................2-5
Factory Configuration of the 9250 Settings .......................................................................................................2-5
Field Configuration of the 9250 Settings............................................................................................................2-6

ii
Chapter 3 - MAINTENANCE, PERFORMANCE CHECKS and ADJUSTMENTS
What’s in This Chapter..........................................................................................................................................3-2
Disassembly Instructions......................................................................................................................................3-2
Special Handling of Static Sensitive Devices ....................................................................................................3-3
Cleaning..................................................................................................................................................................3-4
Repair and Replacement......................................................................................................................................3-4
Performance Checks.............................................................................................................................................3-5
Environmental Conditions ....................................................................................................................................3-5
Warm-up Period.....................................................................................................................................................3-5
9250Configuration for the Tests..........................................................................................................................3-5
Recommended Test Equipment..........................................................................................................................3-5
Performance Check Procedures .........................................................................................................................3-6
Input/Output Impedance .......................................................................................................................................3-6
Test Results............................................................................................................................................................3-6
Gain Accuracy........................................................................................................................................................3-6
Test Results............................................................................................................................................................3-7
Test Results............................................................................................................................................................3-7
Test Results............................................................................................................................................................3-7
Square wave Characteristics ...............................................................................................................................3-7
Test Results............................................................................................................................................................3-8
Output Distortion....................................................................................................................................................3-8
Test Results............................................................................................................................................................3-8
Output Spectral Purity...........................................................................................................................................3-9
Adjustments..........................................................................................................................................................3-10
Introduction...........................................................................................................................................................3-10
Environmental Conditions ..................................................................................................................................3-10
Required Equipment ...........................................................................................................................................3-10
Adjustment Procedures ......................................................................................................................................3-11
CH1 Low Frequency Response.........................................................................................................................3-11
CH2 Low Frequency Response.........................................................................................................................3-11
CH1 High Frequency Response........................................................................................................................3-12
CH2 Low Frequency Response.........................................................................................................................3-12
Channel 1, Auxiliary Offset Adjustment............................................................................................................3-13
Channel 2, Auxiliary Offset Adjustment............................................................................................................3-13
Appendix A - SPECIFICATIONS ................................................................................................................. A-1

iii
List of Figures
Figure 1 1, The Model 9250.................................................................................................................................1-3
Figure 1 2, The 9250 Rear Panel........................................................................................................................1-8
Figure 2 1, Field Modification of Channel 1 Input Impedance ........................................................................2-7
List of Tables
Table 2 1, Input Impedance Jumpers.................................................................................................................2-7
Table 2 2, Output Impedance Jumpers..............................................................................................................2-7
Table 2 3, Input coupling Jumpers......................................................................................................................2-8
Table 2 4, Output coupling Jumpers...................................................................................................................2-8
Table 3 1, Recommended Test Equipment.......................................................................................................3-5
Table 3 2 , Square wave Characteristics Tests ................................................................................................3-7
Table 3 3, Output Distortion Tests ......................................................................................................................3-8
Table 3 4, Front Panel Sine wave Spectral Purity Test ...................................................................................3-9
Table 3 5, Required Equipment.........................................................................................................................3-10

iv
This page intentionally left blank

Chapter 1
PORTRAYAL
What’s in This
Chapter
This chapter contains general and functional description of the
Model 9250 dual/differential wideband power amplifier. It also
describes the front and rear panel connectors and its operational
modes. It also and provides description of all features available with
the instrument.
Introduction The Model 9250, as shown in Figure 1-1, is a bench-top, 2U, half
19” rack size, fully metal case dual channel amplifier. The
instrument can be configured to be used as two, single-ended
independent channels, or as a one input with two differential
outputs.
The inputs to the amplifiers be configured to match different source
impedances such as 50Ω, 75Ω, or 1MΩand the outputs can be
configured to match different load impedances such as 50Ω, 75Ω,
or 600Ω.
There are three inputs for each channel:
1. Main input. This input is located on the front panel is normally
be used for signal inputs.
2. Auxiliary input. This input is located on the rear panel and can
be used as a summing input.
3. DC Offset input. This input is also located on the rear panel and
can be used for offsetting the signal level within the specified
output level window.
The outputs are located on the front panel. There are two outputs,
one for each channel. When the 9250 is configured as two
separate amplifiers, the outputs generate amplified signals within
the range of 40Vp-p into open circuit or 20Vp-p into matching load
impedance. The bandwidth of the outputs is around 20MHz for
large signals. Small signal bandwidth can reach 50MHz.
The 9250 can be configured as a differential amplifier. In this case,
the channel 2 input is disabled and channel 1 input is amplified and
distributed differentially to both outputs. In this case, channel 1
output generates in-phase signal while channel 2 outputs an

User Manual 9250
1-2 Portrayal
inverted signal that has exactly 180°phase offset to the normal
output. Full amplitude and bandwidth is preserved when the 9250
operates in differential mode. The output impedance of the
differential outputs is modified to 25Ω, 37.5Ω, or 300Ωfor
differential drive of 50Ω, 75Ω, or 600Ωloads. Using the differential
mode, the 9250 does not sacrifice accuracy, nor does it sacrifice
bandwidth.
The 9250 has two additional inputs for each channel allowing
summation of two signals and providing an external control of DC
level offset. These inputs are accessible from the rear panel only.
9250 Feature
Highlights
•Bench-top, all metal case
•Large signal bandwidth to 20 MHz
•Small signal bandwidth to 50 MHz
•High amplitude to 40Vp-p (high impedance)
•Low distortion
•Custom Configuration of:
Gain
Input Impedance
Output Impedance
Output configuration – single ended or differential
Conventions
Used in this
Manual
The following symbols may appear in this manual:
Note
A Note contains information relating to the use of this product
TIP
A Tip contains information relating to the performance of this product
Caution
A Caution contains information that should be followed to avoid personal
damage to the instrument or the equipment connected to it.
Warning
A Warning alerts you to a potential hazard. Failure to adhere to the
statement in a WARNING message could result in personal injury.