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Glenayre GL-T8500 User Manual

Gold line 250-watt, 900-mhz power amplifier
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250-Watt Gold Line Power Amplifier
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.
Print Date: 12/17/96
Gold Line GL-T8500
250-Watt, 900-MHz Power Amplifier
USER MANUAL
PN 9110.00160
REV C
RELEASED
Copyright © 1996 Glenayre
Issue 1, Rev. C: 10/21/96
(old part number = 916-8500-000)

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  • Page 1 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. Print Date: 12/17/96 Copyright © 1996 Glenayre...
  • Page 2 250-Watt Gold Line Power Amplifier Glenayre Document Number: 9110.00160 Document Change Record Issue 1, Rev. C: 10/21/96 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:...

  • Page 3: Table Of Contents

    Glenayre Document Number: 9110.00160 250-Watt Gold Line Power Amplifier Issue 1, Rev. C: 10/21/96 Table of Contents Table of Contents GENERAL ........1-1 Manual Scope .
  • Page 4 250-Watt Gold Line Power Amplifier Glenayre Document Number: 9110.00160 Table of Contents Issue 1, Rev. C: 10/21/96 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...
  • Page 5 Glenayre Document Number: 9110.00160 250-Watt Gold Line Power Amplifier Issue 1, Rev. C: 10/21/96 List of Figures List of Figures Figure 3-1 250-Watt, 900-MHz Power Amplifier Front View ....... . 3-2...

  • Page 6: Glenayre Document Number:

    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...
  • Page 7 Glenayre Document Number: 9110.00160 250-Watt Gold Line Power Amplifier Issue 1, Rev. C: 10/21/96 List of Tables List of Tables Table 1-1 Applicable Documents ......1-1 Table 1-2 Manual Sections .
  • Page 8 250-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...

  • Page 9: General

    Glenayre Document Number: 9110.00160 250-Watt Gold Line Power Amplifier Issue 1, Rev. C: 10/21/96 GENERAL GENERAL 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.
  • Page 10 250-Watt Gold Line Power Amplifier Glenayre Document Number: 9110.00160 GENERAL Issue 1, Rev. C: 10/21/96 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.

  • Page 11: Specifications

    Glenayre Document Number: 9110.00160 250-Watt Gold Line Power Amplifier Issue 1, Rev. C: 10/21/96 SPECIFICATIONS SPECIFICATIONS Table 2-1 lists the significant equipment-level specifications for the Gold Line power amplifier. Table 2-1 Power Amplifier Specifications measurement specification height 8.75 in (22.23 cm) width 19 in (48.3 cm)
  • Page 12 250-Watt Gold Line Power Amplifier Glenayre Document Number: 9110.00160 SPECIFICATIONS Issue 1, Rev. C: 10/21/96 Page: 2-2 Copyright © 1996 Glenayre Print Date: 12/17/96...

  • Page 13: Description

    900-MHz Power Amplifier Rear View,show the Gold Line power amplifier (PA). This is a 250-watt PA intended for use in a GL-T8500 paging transmitter with an RF of 900 MHz nominal. This PA is characterized by integrated monitoring devices that supply critical status information to a Gold Line exciter/PA control (exciter).
  • Page 14 250-Watt Gold Line Power Amplifier Glenayre Document Number: 9110.00160 DESCRIPTION Issue 1, Rev. C: 10/21/96 v0222.hgl Figure 3-1 250-Watt, 900-MHz Power Amplifier Front View Page: 3-2 Copyright © 1996 Glenayre Print Date: 12/17/96...

  • Page 15: Figure 3-2 250-Watt, 900-Mhz Power Amplifier Rear View

    Glenayre Document Number: 9110.00160 250-Watt Gold Line Power Amplifier Issue 1, Rev. C: 10/21/96 DESCRIPTION v0221.hgl Figure 3-2 250-Watt, 900-MHz Power Amplifier Rear View Print Date: 12/17/96 Copyright © 1996 Glenayre Page: 3-3...

  • Page 16: Pa Boards

    250-Watt Gold Line Power Amplifier Glenayre Document Number: 9110.00160 DESCRIPTION Issue 1, Rev. C: 10/21/96 3.2.2.2 PA Boards Two PA boards, PA1 (A2) and PA2 (A3), contain the power amplifiers. The PA boards are identical but are mounted with different orientations. Each PA board contains an A and a B pair of power amplifiers.

  • Page 17: Functional Description

    Glenayre Document Number: 9110.00160 250-Watt Gold Line Power Amplifier Issue 1, Rev. C: 10/21/96 DESCRIPTION Functional Description Figure 3-3 shows a simplified, functional diagram of the PA. The driver, combiner, and PA boards constitute the RF amplifier circuitry of the PA. Monitoring and controlling this RF amplifier is the metering board.

  • Page 18: Metering

    250-Watt Gold Line Power Amplifier Glenayre Document Number: 9110.00160 DESCRIPTION Issue 1, Rev. C: 10/21/96 3.3.3 Metering The metering board performs control and status reporting for the PA. The metering board accepts a 25-Vdc power input through the 1/4-inch lugs and a 13.5-Vdc power input through connector P2.

  • Page 19: Installation And Setup

    The PA is shipped already installed in a cabinet. To remove or reinstall the PA, refer to Section 9. Setup Setup of the PA is performed at the system level using an exciter/PA control unit. Refer to the GL-T8500 system manual. The system manual includes instructions for these applicable setup procedures: adjust forward power •...
  • Page 20 250-Watt Gold Line Power Amplifier Glenayre Document Number: 9110.00160 INSTALLATION AND SETUP Issue 1, Rev. C: 10/21/96 Page: 4-2 Copyright © 1996 Glenayre Print Date: 12/17/96...

  • Page 21: Operation

    Glenayre Document Number: 9110.00160 250-Watt Gold Line Power Amplifier Issue 1, Rev. C: 10/21/96 OPERATION OPERATION Controls and Indicators The PA has one indicator and no controls. Figure 5-1, Front-Panel View with Cover Removed shows the location of the PA indicator LED1.

  • Page 22: Figure 5-1 Front-Panel View With Cover Removed

    250-Watt Gold Line Power Amplifier Glenayre Document Number: 9110.00160 OPERATION Issue 1, Rev. C: 10/21/96 v0224.hgl Figure 5-1 Front-Panel View with Cover Removed Page: 5-2 Copyright © 1996 Glenayre Print Date: 12/17/96...

  • Page 23: Theory Of Operation

    Glenayre Document Number: 9110.00160 250-Watt Gold Line Power Amplifier Issue 1, Rev. C: 10/21/96 THEORY OF OPERATION THEORY OF OPERATION Power Distribution The PA requires three separate power inputs: primary 25-volt dc power, secondary 13.5- volt dc power, and fan 25-volt dc power. All power inputs are normally provided by the Gold Line power supply.

  • Page 24: Secondary Power

    250-Watt Gold Line Power Amplifier Glenayre Document Number: 9110.00160 THEORY OF OPERATION Issue 1, Rev. C: 10/21/96 The seven monitored +25-volt signals are individually fused before leaving the metering board. The signals provide operating power for power amplifiers located on the driver and PA boards.

  • Page 25: Rf Distribution

    Glenayre Document Number: 9110.00160 250-Watt Gold Line Power Amplifier Issue 1, Rev. C: 10/21/96 THEORY OF OPERATION RF Distribution Refer to Figure 6-1. The PA RF input is received through a BNC connector, which mates with J3 on the exciter/PA control. This RF input signal (at a nominal 350 mW) is split and amplified into two RF signals (at a nominal 40 watts) by the driver board.

  • Page 26: Pa Board Rf Flow

    250-Watt Gold Line Power Amplifier Glenayre Document Number: 9110.00160 THEORY OF OPERATION Issue 1, Rev. C: 10/21/96 After monitoring, the amplified RF output from the IPA is split in two by means of an RF splitter, commonly known as a Wilkinson splitter. The two split RF signals are applied to driver-1 (Q3) and driver-2 (Q4).

  • Page 27: Control Distribution

    Glenayre Document Number: 9110.00160 250-Watt Gold Line Power Amplifier Issue 1, Rev. C: 10/21/96 THEORY OF OPERATION The circulator RF output is applied through a notch filter to remove the second harmonics generated by the circulator. This filtered RF is the isolator’s RF output. This RF output is typically 250 watts for a standard isolator or 225 watts for a triple isolator.

  • Page 28: Mux Analog Status Signal Flow

    250-Watt Gold Line Power Amplifier Glenayre Document Number: 9110.00160 THEORY OF OPERATION Issue 1, Rev. C: 10/21/96 6.4.1 Mux Analog Status Signal Flow Mux analog status signals consist of dc voltages that represent a parameter or fault within the PA. These signals are generated by current detectors, power monitors, and metering dividers, which supply a status voltage proportional to the level of parameter it is repre- senting, or the existence of the fault it is representing.

  • Page 29: Figure 6-1 250-Watt Pa Interconnection Diagram

    Glenayre Document Number: 9110.00160 250-Watt Gold Line Power Amplifier Issue 1, Rev. C: 10/21/96 THEORY OF OPERATION v0229.hgl Figure 6-1 250-Watt PA Interconnection Diagram Print Date: 12/17/96 Copyright © 1996 Glenayre Page: 6-7...

  • Page 30: Figure 6-2 250-Watt Pa Functional Diagram

    250-Watt Gold Line Power Amplifier Glenayre Document Number: 9110.00160 THEORY OF OPERATION Issue 1, Rev. C: 10/21/96 v0203.hgl Figure 6-2 250-Watt PA Functional Diagram Page: 6-8 Copyright © 1996 Glenayre Print Date: 12/17/96...

  • Page 31: Figure 6-3 250-Watt Pa Detailed Functional Diagram

    Glenayre Document Number: 9110.00160 250-Watt Gold Line Power Amplifier Issue 1, Rev. C: 10/21/96 THEORY OF OPERATION v0202l .hgl Figure 6-3 250-Watt PA Detailed Functional Diagram Print Date: 12/17/96 Copyright © 1996 Glenayre Page: 6-9...
  • Page 32 250-Watt Gold Line Power Amplifier Glenayre Document Number: 9110.00160 THEORY OF OPERATION Issue 1, Rev. C: 10/21/96 v0202r.hgl 250-Watt PA Detailed Functional Diagram Page: 6-10 Copyright © 1996 Glenayre Print Date: 12/17/96...

  • Page 33: Figure 6-4 Metering Board Functional Diagram

    Glenayre Document Number: 9110.00160 250-Watt Gold Line Power Amplifier Issue 1, Rev. C: 10/21/96 THEORY OF OPERATION v0204l .hgl Figure 6-4 Metering Board Functional Diagram Print Date: 12/17/96 Copyright © 1996 Glenayre Page: 6-11...
  • Page 34 250-Watt Gold Line Power Amplifier Glenayre Document Number: 9110.00160 THEORY OF OPERATION Issue 1, Rev. C: 10/21/96 0204r.hgl Metering Board Functional Diagram Page: 6-12 Copyright © 1996 Glenayre Print Date: 12/17/96...

  • Page 35: Maintenance

    Glenayre Document Number: 9110.00160 250-Watt Gold Line Power Amplifier Issue 1, Rev. C: 10/21/96 MAINTENANCE MAINTENANCE Refer to the system and VDT manuals. Print Date: 12/17/96 Copyright © 1996 Glenayre Page: 7-1...
  • Page 36 250-Watt Gold Line Power Amplifier Glenayre Document Number: 9110.00160 MAINTENANCE Issue 1, Rev. C: 10/21/96 Page: 7-2 Copyright © 1996 Glenayre Print Date: 12/17/96...

  • Page 37: Checkout And Troubleshooting

    Glenayre Document Number: 9110.00160 250-Watt Gold Line Power Amplifier Issue 1, Rev. C: 10/21/96 CHECKOUT AND TROUBLESHOOTING CHECKOUT AND TROUBLESHOOTING Refer to the system and VDT manuals. Print Date: 12/17/96 Copyright © 1996 Glenayre Page: 8-1...
  • Page 38 250-Watt Gold Line Power Amplifier Glenayre Document Number: 9110.00160 CHECKOUT AND TROUBLESHOOTING Issue 1, Rev. C: 10/21/96 Page: 8-2 Copyright © 1996 Glenayre Print Date: 12/17/96...

  • Page 39: Removal And Reinstallation

    Glenayre Document Number: 9110.00160 250-Watt Gold Line Power Amplifier Issue 1, Rev. C: 10/21/96 REMOVAL AND REINSTALLATION REMOVAL AND REINSTALLATION PA Chassis Removal and Reinstallation Figure 9-1 shows details of removing and reinstalling the chassis. Calibration of forward and reflected power is required after reinstallation.

  • Page 40: Figure 9-1 Pa Removal And Reinstalllation

    250-Watt Gold Line Power Amplifier Glenayre Document Number: 9110.00160 REMOVAL AND REINSTALLATION Issue 1, Rev. C: 10/21/96 v0223.hgl Figure 9-1 PA Removal and Reinstalllation Page: 9-2 Copyright © 1996 Glenayre Print Date: 12/17/96...
  • Page 41 Glenayre Document Number: 9110.00160 250-Watt Gold Line Power Amplifier Issue 1, Rev. C: 10/21/96 REMOVAL AND REINSTALLATION Print Date: 12/17/96 Copyright © 1996 Glenayre Page: 9-3...

  • Page 42: Figure 9-2 Pa Rf Module Removal And Reinstallation

    250-Watt Gold Line Power Amplifier Glenayre Document Number: 9110.00160 REMOVAL AND REINSTALLATION Issue 1, Rev. C: 10/21/96 v0225.hgl Figure 9-2 PA RF Module Removal and Reinstallation Page: 9-4 Copyright © 1996 Glenayre Print Date: 12/17/96...
  • Page 43 Glenayre Document Number: 9110.00160 250-Watt Gold Line Power Amplifier Issue 1, Rev. C: 10/21/96 REMOVAL AND REINSTALLATION Figure 9-2 PA RF Module Removal and Reinstallation (continued) Print Date: 12/17/96 Copyright © 1996 Glenayre Page: 9-5...

  • Page 44: Figure 9-3 Metering Board Removal And Reinstallation

    250-Watt Gold Line Power Amplifier Glenayre Document Number: 9110.00160 REMOVAL AND REINSTALLATION Issue 1, Rev. C: 10/21/96 v0228.hgl Figure 9-3 Metering Board Removal and Reinstallation Page: 9-6 Copyright © 1996 Glenayre Print Date: 12/17/96...
  • Page 45 Glenayre Document Number: 9110.00160 250-Watt Gold Line Power Amplifier Issue 1, Rev. C: 10/21/96 REMOVAL AND REINSTALLATION v0227.hgl Figure 9-3 Metering Board Removal and Reinstallation (continued) Print Date: 12/17/96 Copyright © 1996 Glenayre Page: 9-7...
  • Page 46 250-Watt Gold Line Power Amplifier Glenayre Document Number: 9110.00160 REMOVAL AND REINSTALLATION Issue 1, Rev. C: 10/21/96 Page: 9-8 Copyright © 1996 Glenayre Print Date: 12/17/96...

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