Pulsar LPA50 User guide

LPA50/LPA100
50/100W LINEAR POWER AMPLIFIER
System Manual
CA44–VER03
(Replaces CA44-VER02)
Technologies, Inc.
4050 NW 121st Avenue
Coral Springs, FL 33065
1–800–785–7274
www.pulsartech.com
Printed June 2001

Copyright © 2001 Pulsar Technologies, Inc.

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LPA50/
LPA100
System Manual
Table
of
Contents
2

ii June 2001
Technologies, Inc.
Trademarks
All terms mentioned in this book that are known to be trademarks or service marks are listed below.
In addition, terms suspected of being trademarks or service marks have been appropriately capital-
ized. Pulsar Technologies, Inc. cannot attest to the accuracy of this information. Use of a term in this
book should not be regarded as affecting the validity of any trademark or service mark.
IBM and PC are registered trademarks of the International Business Machines Corporation.
Changes Since the Last Publication
The previous publication (CA44-VER02) was published in May 1998. This manual has been totally reformatted in June 2001.
Technical information regarding the LPA50/LPA100 is generally the same as in the last publication (CA44-VER02). Change bars,
like the ones in the left margin on this page, are next to important new information that may affect the operation of the
LPA50/LPA100. Note also that in some cases text and graphics may have flowed to a different page than in the previous publi-
cation due to formatting or other changes.
Chapter Number & Title Publication Date Pages with Changes
Front Section June 2001 Entire chapter reformatted
1. Product Description June 2001 Entire chapter reformatted
2. Applications and Ordering Information June 2001 Entire chapter reformatted
3. Installation June 2001 Entire chapter reformatted
4. Test Equipment June 2001 Entire chapter reformatted
5. Initial Adjustment June 2001 Entire chapter reformatted
6. Maintenance June 2001 Entire chapter reformatted
7. Power Supply Module June 2001 Entire chapter reformatted
8. 12.5W PA Module June 2001 Entire chapter reformatted
9. 50W Combiner Module June 2001 Entire chapter reformatted
10. 100W Combiner Module June 2001 Entire chapter reformatted

June 2001
iii
Linear Power Amplifier LPA50 / LPA100
e recommend that you become acquainted with the information in this manual before ener-
gizing your LPA50 or LPA100. Failure to do so may result in injury to personnel or damage to
the equipment, and may affect the equipment warranty. If you mount the LPA chassis in a
cabinet, it must be bolted to the floor or otherwise secured before you swing out the equipment,
to prevent the installation from tipping over.
You should neither remove nor insert printed circuit modules while the unit is energized. Failure
to observe this precaution can cause component damage.
All integrated circuits used on the modules are sensitive to and can be damaged by the discharge
of static electricity. You should observe electrostatic discharge precautions when handling
modules or individual components.
PULSAR does not assume liability arising out of the application or use of any product or circuit
described herein. PULSAR reserves the right to make changes to any products herein to improve
reliability, function or design. Specifications and information herein are subject to change
without notice. All possible contingencies which may arise during installation, operation, or
maintenance, and all details and variations of this equipment do not purport to be covered by
these instructions. If you desire further information regarding a particular installation,
operation, or maintenance of equipment, please contact your local Pulsar Technologies, Inc.
representative.
Copyright ©
By Pulsar Technologies, Inc.
ALL RIGHTS RESERVED
PULSAR does not convey any license under its patent rights nor the rights of others.
!IMPORTANT
W

Preface
Scope
This manual describes the functions and features of the LPA50 and LPA100 linear power amplifiers.
It is intended primarily for use by engineers and technicians involved in the installation, alignment,
operation, and maintenance of the LPA50/LPA100.
Equipment Identification
The LPA50/LPA100 equipment is identified by the Catalog Number on the chassis nameplate. You can
decode the Catalog Number using Tables 2-1 and 2-2 (see Chapter 2).
Production Changes
When engineering and production changes are made to the LPA50/LPA100 equipment, a revision notation
(Sub number) is reflected on the style number, related schematic diagram, and associated parts informa-
tion. A summary of all Sub numbers for the particular release is shown on the following page.
Warranty
Our standard warranty extends for either 18 months after the equipment is in-service or 24 months after
shipment, whichever comes first. For all repaired modules or advance replacements, the standard warranty
is 90 days or the remaining warranty time, whichever is longer. Damage clearly caused by improper appli-
cation, repair, or handling of the equipment will void the warranty.
Equipment Return & Repair Procedure
To return equipment for repair or replacement:
1. Call your PULSAR representative at 1–800–785–7274.
2. Request an RMA number for proper authorization and credit.
3. Carefully pack the equipment you are returning.
Repair work is done most satisfactorily at the factory. When returning any equipment, pack it in
the original shipping containers if possible. Be sure to use anti-static material when packing the
equipment. Any damage due to improperly packed items will be charged to the customer, even
when under warranty.
Pulsar Technologies, Inc. also makes available interchangeable parts to customers who are
equipped to do repair work. When ordering parts (components, modules, etc.), always give the
complete PULSAR style number(s).
4. Make sure you include your return address and the RMA number on the package.
5. Ship the package(s) to:
Pulsar Technologies, Inc.
Communications Division
4050 NW 121st Avenue
Coral Springs, FL 33065
iv June 2001
Technologies, Inc.

June 2001
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Linear Power Amplifier LPA50 / LPA100
Document Overview
The LPA50/LPA100 circuitry is divided into three (3) modules. The power supply and power amplifier
modules are the same modules used in the TC-10B/TCF-10B systems. The combiner modules were
specially designed for the LPA50/LPA100 system.
Chapter 1 provides the Product Description. Chapter 2 presents applications and related catalog numbers
for ordering purposes. The LPA50/LPA100 installation is described in Chapter 3, with maintenance proce-
dures in Chapter 6. Chapters 4, 5, and 6 identify test equipment, initial adjustments, and maintenance
procedures, respectively. Module circuit descriptions and troubleshooting procedures are in Chapters 7
thru 10.
Contents of LPA50 and LPA100
The LPA50 and LPA100 include the modules and parts listed below. The style number and latest revision
level for each module and part is shown, as is the the quantity included with each set. (For ordering infor-
mation, please see Table 2-1 in Chapter 2.)
Sub Number Quantity per
Module/Part Style # (Revision Level) LPA50 LPA100
Power Supply 1617C38G01, 2, or 3 2 2 4
12.5W Power Amplifier 1606C33G01 21 4 8
50W Power Combiner CA20-CMBMN-001 02 1 2
100W Power Combiner CA20-CMBMN-002 02 0 1
19” Chassis 1353D63G04 n/a 1 2
Chassis Front Cover 1606C49G01 n/a 1 2
Interconnecting Cables n/a 0 1 lot

FIGURES
Figure No. Page No.
1-1 Front View of the LPA50/LPA100 Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
1-2 LPA50 Functional Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9
1-3 LPA100 Functional Diagram (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10
1-4 LPA100 Functional Diagram (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-11
2-1 TC-10B with LPA RF connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
2-2 TC-10B (Analog Receiver) or TCF-10B RF connections . . . . . . . . . . . . . . . . . . .2-1
3-1 LPA50/LPA100 chassis dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
3-2 LPA50/LPA100 chassis footprint dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
3-3 LPA50 Connection Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5
3-4 LPA100 Connection Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6
4-1 Extender Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
5-1 LPA Front panels & Test points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-7
5-2 LPA50 Connection Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-8
5-3 LPA100 Connection Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-9
7-1 Power supply front panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
7-2 Power supply component layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-2
7-3 Power supply schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-4
8-1 12.5W PA front panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-1
8-2 12.5W PA component layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-3
8-3 12.5W PA schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-4
9-1 50W Combiner Module LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-2
9-2 50W Combiner Module component layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-3
9-3 50W Combiner Module schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-4
10-1 100W Combiner Module LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-1
10-2 50W Combiner Module LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-2
10-3 100W Combiner Module component layout . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-3
10-4 100W Combiner Module schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-4
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Technologies, Inc.

TABLES
Table No. Page No.
1-1 LPA50 Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
1-2 LPA100 Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
1-3 Environmental requirements specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
1-4 Altitude Dielectric Strength De-Rating for Air Insulation . . . . . . . . . . . . . . . . . . .1-8
1-5 Altitude Correction For Maximum Temperature Of Cooling Air (ANS C93.5) . .1-8
2-1 LPA50/LPA100 Catalog Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
2-2 LPA50/LPA100 Module and Chassis Style Numbers . . . . . . . . . . . . . . . . . . . . . .2-3
4-1 LPA50/LPA100 Recommended Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
7-1 1617C38 Styles and Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
8-1 1606C33 Styles and Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-1
June 2001
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Linear Power Amplifier LPA50 / LPA100

Technologies, Inc.