Glenayre GL-T8500 User manual

Print Date: 12/17/96 Copyright © 1996 Glenayre
250-Watt Gold Line Power Amplifier Issue 1, Rev. C: 10/21/96
Specifications subject to change without notice
Copyright © 1996 Glenayre
All rights reserved. No part of this work may be reproduced or copied in any form or by
any means—graphic, electronic, or mechanical, including photocopying, recording,
taping, or information-retrieval system—without written permission of Glenayre.
Gold Line GL-T8500
250-Watt, 900-MHz Power Amplifier
USER MANUAL
PN 9110.00160 (old part number = 916-8500-000)
REV C
RELEASED

250-Watt Gold Line Power Amplifier Glenayre Document Number: 9110.00160
Document Change Record Issue 1, Rev. C: 10/21/96
Copyright © 1996 Glenayre Print Date: 12/17/96
Document Change Record
Revision: 0, Preliminary
Date: 05/04/95
Changes: none, original
Issue: Rev B
Date: 02/02/96
Changes: new format
Issue: Rev C
Date: 10/21/96
Changes: made released

Glenayre Document Number: 9110.00160 250-Watt Gold Line Power Amplifier
Issue 1, Rev. C: 10/21/96 Table of Contents
Print Date: 12/17/96 Copyright © 1996 Glenayre Page: -i
Table of Contents
1 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1.1 Manual Scope . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1.2 Applicable Documents. . . . . . . . . . . . . . . . . . . . . 1-1
1.3 Manual Sections . . . . . . . . . . . . . . . . . . . . . . . 1-1
2 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
3 DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3.2 Physical Description. . . . . . . . . . . . . . . . . . . . . . 3-1
3.2.1 Mounting Provisions . . . . . . . . . . . . . . . . . . . . . . . .3-1
3.2.2 PA Front. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
3.2.2.1 Driver Board . . . . . . . . . . . . . . . . . . . . . .3-1
3.2.2.2 PA Boards. . . . . . . . . . . . . . . . . . . . . . . .3-4
3.2.2.3 Combiner Board. . . . . . . . . . . . . . . . . . . . .3-4
3.2.2.4 Metering Board . . . . . . . . . . . . . . . . . . . . .3-4
3.2.3 PA Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
3.2.3.1 Isolator . . . . . . . . . . . . . . . . . . . . . . . . .3-4
3.2.3.2 Fan . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
3.2.3.3 Equipment Connectors . . . . . . . . . . . . . . . . .3-4
3.3 Functional Description. . . . . . . . . . . . . . . . . . . . . 3-5
3.3.1 RF Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5
3.3.2 Isolator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5
3.3.3 Metering. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6
4 INSTALLATION AND SETUP . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
4.1 Installation . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
4.2 Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
4.3 Ultimate Disposition . . . . . . . . . . . . . . . . . . . . . 4-1
5 OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
5.1 Controls and Indicators . . . . . . . . . . . . . . . . . . . . 5-1
5.2 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
5.2.1 Turn PA On and Off . . . . . . . . . . . . . . . . . . . . . . . .5-1
5.2.2 Turn Fan On and Off . . . . . . . . . . . . . . . . . . . . . . . .5-1
5.2.3 Key and Unkey PA . . . . . . . . . . . . . . . . . . . . . . . . .5-1
6 THEORY OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
6.1 Power Distribution . . . . . . . . . . . . . . . . . . . . . . 6-1
6.1.1 Primary Power . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1

250-Watt Gold Line Power Amplifier Glenayre Document Number: 9110.00160
Table of Contents Issue 1, Rev. C: 10/21/96
Page: -ii Copyright © 1996 Glenayre Print Date: 12/17/96
6.1.1.1 Metering Board +25V Signal Flow. . . . . . . . . . . 6-1
6.1.1.2 Power Amplifiers +25V Signal Flow. . . . . . . . . . 6-1
6.1.2 Secondary Power . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
6.1.2.1 Metering Board +13.5V Signal Flow. . . . . . . . . . 6-2
6.1.2.2 Preamplifier Module +13.5V Signal Flow . . . . . . . 6-2
6.1.3 Fan Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
6.2 RF Distribution . . . . . . . . . . . . . . . . . . . . . . . 6-3
6.2.1 Driver Board RF Flow . . . . . . . . . . . . . . . . . . . . . . . 6-3
6.2.2 PA Board RF Flow . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
6.2.3 Combiner Board RF Flow . . . . . . . . . . . . . . . . . . . . . 6-4
6.2.4 Isolator RF Flow . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5
6.3 Control Distribution . . . . . . . . . . . . . . . . . . . . . 6-5
6.3.1 AGC Signal Flow. . . . . . . . . . . . . . . . . . . . . . . . . . 6-5
6.3.2 Multiplexer Control Signal Flow . . . . . . . . . . . . . . . . . . 6-6
6.4 Status Distribution . . . . . . . . . . . . . . . . . . . . . . 6-6
6.4.1 Mux Analog Status Signal Flow . . . . . . . . . . . . . . . . . . 6-6
6.4.2 PA Fault Signal Flow. . . . . . . . . . . . . . . . . . . . . . . . 6-6
7 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
8 CHECKOUT AND TROUBLESHOOTING . . . . . . . . . . . . . . . . . . 8-1
9 REMOVAL AND REINSTALLATION . . . . . . . . . . . . . . . . . . . . 9-1
9.1 PA Chassis Removal and Reinstallation . . . . . . . . . . . . . 9-1
9.2 PA RF Module Removal and Reinstallation . . . . . . . . . . . . 9-1
9.3 Metering Board Removal and Reinstallation . . . . . . . . . . . . 9-1

Glenayre Document Number: 9110.00160 250-Watt Gold Line Power Amplifier
Issue 1, Rev. C: 10/21/96 List of Figures
Print Date: 12/17/96 Copyright © 1996 Glenayre Page: -iii
List of Figures
Figure 3-1 250-Watt, 900-MHz Power Amplifier
Front View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Figure 3-2 250-Watt, 900-MHz Power Amplifier
Rear View. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Figure 3-3 PA Simplified-Block Diagram . . . . . . . . . . . . . . . . . . . . . . 3-5
Figure 5-1 Front-Panel View with Cover Removed . . . . . . . . . . . . . . . . . 5-2
Figure 6-1 250-Watt PA Interconnection Diagram. . . . . . . . . . . . . . . . . . 6-8
Figure 6-2 250-Watt PA Functional Diagram . . . . . . . . . . . . . . . . . . . . 6-9
Figure 6-3 250-Watt PA Detailed Functional Diagram . . . . . . . . . . . . . . .6-10
Figure 6-4 Metering Board Functional Diagram . . . . . . . . . . . . . . . . . . .6-12
Figure 9-1 PA Removal and Reinstalllation . . . . . . . . . . . . . . . . . . . . . 9-2
Figure 9-2 PA RF Module Removal and Reinstallation . . . . . . . . . . . . . . . 9-3
Figure 9-3 Metering Board Removal and Reinstallation . . . . . . . . . . . . . . . 9-5

250-Watt Gold Line Power Amplifier Glenayre Document Number: 9110.00160
List of Figures Issue 1, Rev. C: 10/21/96
Page: -iv Copyright © 1996 Glenayre Print Date: 12/17/96

Glenayre Document Number: 9110.00160 250-Watt Gold Line Power Amplifier
Issue 1, Rev. C: 10/21/96 List of Tables
Print Date: 12/17/96 Copyright © 1996 Glenayre Page: -v
List of Tables
Table 1-1 Applicable Documents . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Table 1-2 Manual Sections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Table 2-1 Power Amplifier Specifications. . . . . . . . . . . . . . . . . . . . . . 2-1
Table 3-1 PA Circuit Boards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Table 6-1 Multiplexer Analog Status Inputs. . . . . . . . . . . . . . . . . . . . . 6-7

250-Watt Gold Line Power Amplifier Glenayre Document Number: 9110.00160
List of Tables Issue 1, Rev. C: 10/21/96
Page: -vi Copyright © 1996 Glenayre Print Date: 12/17/96

Glenayre Document Number: 9110.00160 250-Watt Gold Line Power Amplifier
Issue 1, Rev. C: 10/21/96 GENERAL
Print Date: 12/17/96 Copyright © 1996 Glenayre Page: 1-1
1 GENERAL
1.1 Manual Scope
This manual provides information for the 250-watt, 900-MHz Gold Line power amplifier,
part number 265-0082-013. Also included is information for the optional triple isolator,
part number 7914.00010.
1.2 Applicable Documents
This manual is incomplete without additional Gold Line manuals. Refer to Table 1-1 fora
listing and function of these manuals.
1.3 Manual Sections
Table 1-2 lists the sections of this manual with a summary of their contents.
Table 1-1 Applicable Documents
document part number function
GL-T8500/8600 system man-
ual 9110.00163 describes fully racked-up Gold Line transmitter
VDT manual 9110.00164 describes PA control software
installed in exciter
exciter manual 9110.00172 describes exciter/PA control
equipment in transmitter
250-watt PA 9110.00160 this manual
power supply manual 9110.00159 describes 50A/90A power supply
equipment in transmitter

250-Watt Gold Line Power Amplifier Glenayre Document Number: 9110.00160
GENERAL Issue 1, Rev. C: 10/21/96
Page: 1-2 Copyright © 1996 Glenayre Print Date: 12/17/96
Table 1-2 Manual Sections
section contents
1. General introduction and purpose of manual
2. Specifications significant measurements of power amplifier
3. Description introduction and principal characteristics of power
amplifier
4. Installation and Setup initial installation and activation of power amplifier
5. Operation operation of power amplifier
6. Theory of Operation detailed functional description of circuitry within
power amplifier
7. Maintenance procedures to be performed on specific intervals to
maintain optimum performance of power amplifier
8. Checkout and Troubleshooting verification of proper operation, correction to proper
operation of power amplifier
9. Removal and Reinstallation replacement procedures for power amplifier and
selected subassemblies