Glenayre Electronics GL-T8200 Low Power Transmitter for 1 and 2way wireless data User Manual

Glenayre Electronics Inc Low Power Transmitter for 1 and 2way wireless data

Contents

Composite of users manuals

Print Date: 03/23/99 Copyright © 1999 GlenayreGL-T8200 1- to 25-Watt 900-MHz Power Amplifier Rev. A: 03/23/99Specifications subject to change without noticeCopyright © 1999 GlenayreAll 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.GL-T8200 1- to 25-Watt, 900-MHz Power AmplifierUSER MANUAL PN 9110.01306REV A
GL-T8200 1- to 25-Watt 900-MHz Power Amplifier Glenayre Document Number: 9110.01306Document Change Record Rev. A: 03/23/99 Copyright © 1999 Glenayre Print Date: 03/23/99Document Change RecordRevision: Revision ADate: 03/23/99Changes: none, original
Glenayre Document Number: 9110.01306 GL-T8200 1- to 25-Watt 900-MHz Power AmplifierRev. A: 03/23/99 Table of Contents25w82001.tocPrint Date: 04/14/99 Copyright © 1999 Glenayre Page: -iTable of Contents1 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11.1 Manual Scope . . . . . . . . . . . . . . . . . . . . . . . . 1-11.2 Applicable Documents. . . . . . . . . . . . . . . . . . . . . 1-11.3 Manual Sections . . . . . . . . . . . . . . . . . . . . . . . 1-12 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13 DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13.1 Physical Description. . . . . . . . . . . . . . . . . . . . . . 3-13.1.1 Mounting Provisions . . . . . . . . . . . . . . . . . . . . . . . .3-13.1.2 PA Chassis Rear Connector Panel . . . . . . . . . . . . . . . . .3-13.2 Functional Description. . . . . . . . . . . . . . . . . . . . . 3-33.2.1 RF Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-33.2.2 Signal and Power Connections . . . . . . . . . . . . . . . . . . .3-33.2.3 Isolator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-44 INSTALLATION AND SETUP . . . . . . . . . . . . . . . . . . . . . . . . . 4-14.1 Cabinet Installation and External Cabling . . . . . . . . . . . . . 4-14.1.1 Tools and Equipment Required . . . . . . . . . . . . . . . . . . .4-14.1.2 Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-14.1.3 Rack Positioning . . . . . . . . . . . . . . . . . . . . . . . . . .4-14.1.4 External Cabinet Equipment Cabling . . . . . . . . . . . . . . . .4-14.1.5 PA I/O Connections. . . . . . . . . . . . . . . . . . . . . . . . .4-24.2 Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-34.2.1 Expected Exciter . . . . . . . . . . . . . . . . . . . . . . . . . .4-34.2.2 Setup Using VDT . . . . . . . . . . . . . . . . . . . . . . . . . .4-35 OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15.1 Controls and Indicators . . . . . . . . . . . . . . . . . . . . 5-15.2 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15.2.1 Turn PA On and Off . . . . . . . . . . . . . . . . . . . . . . . .5-15.2.2 Turn Fan On and Off . . . . . . . . . . . . . . . . . . . . . . . .5-15.2.3 Key and Unkey PA . . . . . . . . . . . . . . . . . . . . . . . . .5-16 THEORY OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16.1 Power Distribution . . . . . . . . . . . . . . . . . . . . . . 6-16.1.1 Fan Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-16.1.2 High-Current Power to PA Board. . . . . . . . . . . . . . . . . .6-16.1.3 Metering Circuit Regulators . . . . . . . . . . . . . . . . . . . .6-16.2 RF Flow . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
GL-T8200 1- to 25-Watt 900-MHz Power Amplifier Glenayre Document Number: 9110.01306Table of Contents Rev. A: 03/23/99Page: -ii Copyright © 1999 Glenayre Print Date: 04/14/996.3 PA Board . . . . . . . . . . . . . . . . . . . . . . . . . 6-26.3.1 Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-36.3.2 Internally Generated Voltages . . . . . . . . . . . . . . . . . . 6-36.4 Exciter Interface . . . . . . . . . . . . . . . . . . . . . . . 6-56.4.1 Exciter Interface Connector Pinout. . . . . . . . . . . . . . . . . 6-56.5 Analog Readings Thresholds . . . . . . . . . . . . . . . . . . 6-56.5.1 PA Board Currents . . . . . . . . . . . . . . . . . . . . . . . . . 6-66.5.2 PA Forward Power . . . . . . . . . . . . . . . . . . . . . . . . . 6-66.5.3 PA Reflected Power . . . . . . . . . . . . . . . . . . . . . . . . 6-66.5.4 PA Board RF Input Power . . . . . . . . . . . . . . . . . . . . . 6-66.5.5 +28-Volt External Supply . . . . . . . . . . . . . . . . . . . . . 6-66.5.6 +36-Volt Internal Supply . . . . . . . . . . . . . . . . . . . . . . 6-66.5.7 +5-Volt Internal Supplies. . . . . . . . . . . . . . . . . . . . . . 6-76.5.8 Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-77 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-17.1 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . 7-17.2 Power Calibration . . . . . . . . . . . . . . . . . . . . . . 7-18 CHECKOUT AND TROUBLESHOOTING . . . . . . . . . . . . . . . . . . 8-18.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . 8-18.2 Checkout Procedures . . . . . . . . . . . . . . . . . . . . . 8-18.2.1 VDT Power-Up Verification . . . . . . . . . . . . . . . . . . . . 8-18.2.2 Dc Voltage Verification . . . . . . . . . . . . . . . . . . . . . . 8-18.3 Troubleshooting Procedures . . . . . . . . . . . . . . . . . . 8-18.3.1 Parameter Readings at Time of Fault. . . . . . . . . . . . . . . . 8-18.3.2 GL-C2000 Transmitter Controller Alarms . . . . . . . . . . . . . 8-28.3.3 Operational Checks . . . . . . . . . . . . . . . . . . . . . . . . . 8-28.3.4 Power Amplifier Current Measurement . . . . . . . . . . . . . . 8-29 REMOVAL AND REINSTALLATION . . . . . . . . . . . . . . . . . . . . 9-19.1 PA . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-19.1.1 Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-19.1.2 Reinstallation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1
Glenayre Document Number: 9110.01306 GL-T8200 1- to 25-Watt 900-MHz Power AmplifierRev. A: 03/23/99 List of Figures25w82001.lofPrint Date: 04/14/99 Copyright © 1999 Glenayre Page: -iiiList of FiguresFigure 3-1 PA Front Isometric View . . . . . . . . . . . . . . . . . . . . . . . . . 3-2Figure 3-2 Top View of PA RF Compartments, Showing Internal Assemblies . . . 3-3Figure 4-1 PA Rear View. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4Figure 6-1 Simplified Power Amplifier Block Diagram . . . . . . . . . . . . . . . 6-2Figure 6-2 PA Board Functional Diagram . . . . . . . . . . . . . . . . . . . . . . 6-4
GL-T8200 1- to 25-Watt 900-MHz Power Amplifier Glenayre Document Number: 9110.01306List of Figures Rev. A: 03/23/99Page: -iv Copyright © 1999 Glenayre Print Date: 04/14/99
Glenayre Document Number: 9110.01306 GL-T8200 1- to 25-Watt 900-MHz Power AmplifierRev. A: 03/23/99 List of Tables25w82001.lotPrint Date: 04/14/99 Copyright © 1999 Glenayre Page: -vList of TablesTable 1-1 Applicable Documents . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1Table 1-2 Manual Sections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2Table 2-1 Power Amplifier Specifications. . . . . . . . . . . . . . . . . . . . . . 2-1Table 4-1 Required Tools and Equipment. . . . . . . . . . . . . . . . . . . . . . 4-1Table 4-2 PA I/O Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2Table 4-3 Exciter/PA Connector Pinout (For DSP Exciter) . . . . . . . . . . . . . 4-3Table 4-4 PA Board Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5Table 6-1 PA Board Voltages . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1Table 6-2 Metered Parameter Thresholds . . . . . . . . . . . . . . . . . . . . . . 6-7Table 8-1 PA Board Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2
GL-T8200 1- to 25-Watt 900-MHz Power Amplifier Glenayre Document Number: 9110.01306List of Tables Rev. A: 03/23/99Page: -vi Copyright © 1999 Glenayre Print Date: 04/14/99
Glenayre Document Number: 9110.01306 GL-T8200 1- to 25-Watt 900-MHz Power AmplifierRev. A: 03/23/99 GENERAL25w82001Print Date: 05/10/99 Copyright © 1999 Glenayre Page: 1-11 GENERAL1.1 Manual ScopeThis manual provides information for the 1 to 25-watt, 900-MHz power amplifier, partnumber 1000.02186. 1.2 Applicable DocumentsThis manual is incomplete without additional manuals. Refer to Table 1-1 for a listing andfunction of these manuals. 1.3 Manual SectionsTable 1-2 lists the sections of this manual with a summary of their contents.Table 1-1 Applicable Documentsdocument part number functionGL-T8200 system manual 9110.01305 describes fully racked-up GL-T8200 transmitterDSP VDT manual 9110.00259 describes DSP exciter software in-stalled in exciterDSP exciter user manual 9110.01021 describes DSP exciter hardware equipment in transmitterGL-T8200 1 to 25-watt PA manual 9110.01306 this manualpower supply manual 9110.00622 describes GL2728 power supply equipment
GL-T8200 1- to 25-Watt 900-MHz Power Amplifier Glenayre Document Number: 9110.01306GENERAL Rev. A: 03/23/99Page: 1-2 Copyright © 1999 Glenayre Print Date: 05/10/99 Table 1-2 Manual Sections section contents1. General introduction and purpose of manual2. Specifications significant measurements of power amplifier3. Description introduction and principal characteristics of power amplifier4. Installation and Setup initial installation and activation of power amplifier5. Operation operation of power amplifier6. Theory of Operation detailed functional description of circuitry within power amplifier7. Maintenance procedures to be performed on specific intervals to maintain optimum performance of power amplifier8. Checkout and Troubleshooting verification of proper operation, correction to proper operation of power amplifier9. Removal and Reinstallation removal and reinstallation procedures for the PA
Glenayre Document Number: 9110.01306 GL-T8200 1- to 25-Watt 900-MHz Power AmplifierRev. A: 03/23/99 SPECIFICATIONS25w82002Print Date: 03/29/99 Copyright © 1999 Glenayre Page: 2-12 SPECIFICATIONSTable 2-1 lists the significant equipment-level specifications for the power amplifier.Table 2-1 Power Amplifier Specificationsmeasurement condition specificationElectricalRF output power (W) continuous, at output of PA 1 to 25RF bandwidth (MHz) exceeds exciter bandwidthRF input power (mW) factory-set attenuation 200-400RF input connector type-N femaleRF output connector output of PA type-N femaleinput and output RF impedance (ohms) 50VSWR max 1.5dc input powervoltage (Vdc)current, idle/operating (A) 28Mechanical and Environmentalhumidity 5 to 95%, noncondensingambient storage temperature -30o to 70oCambient operating temperature -30o to 60oCtemperature derating factor above 5000 feet (1500 m) 0.5oC per 100 mvibration Mil-Std 810E, Method 514.4 Category 1maximum operating elevation to 10,000 ft (3050 m)height 3 RU (5.25 in, 13.4 cm)width 19 in (48 cm)depth 12 in (30.5 cm)weight 25 lb (11.3 kg)
GL-T8200 1- to 25-Watt 900-MHz Power Amplifier Glenayre Document Number: 9110.01306SPECIFICATIONS Rev. A: 03/23/99Page: 2-2 Copyright © 1999 Glenayre Print Date: 03/29/99
Glenayre Document Number: 9110.01306 GL-T8200 1- to 25-Watt 900-MHz Power AmplifierRev. A: 03/23/99 DESCRIPTION25w82003Print Date: 05/10/99 Copyright © 1999 Glenayre Page: 3-13 DESCRIPTIONThis is a 1- to 25-watt PA intended for use on the 900-MHz band. This PA is characterizedby integrated monitoring devices that supply critical status information to the DSP exciter.This exciter contains diagnostic software that can detect and report a faulty PA.3.1 Physical DescriptionRefer to Figure 3-1 and Figure 3-2. The PA consists of a 3 RU high chassis, includingconvection fins and one fan.The chassis contains a PA board which contains metering circuitry, power distributioncircuitry, and RF amplification circuitry.3.1.1 Mounting ProvisionsThe PA is mounted to the front of most standard 19-inch equipment racks by means of eightscrews. The front panel of the PA may by removed while the PA is mounted in the rack foraccess to fuses. Thumbscrews secure the front panel to the PA. 3.1.2 PA Chassis Rear Connector PanelRefer to Figure 4-2 for a list of connections for the PA. The PA chassis rear connector panelhas an RF input connector, an RF output connector, a dc power input connector, a dc poweroutput connector, a fan, and a 15-pin connector for connection to the DSP exciter.
GL-T8200 1- to 25-Watt 900-MHz Power Amplifier Glenayre Document Number: 9110.01306DESCRIPTION Rev. A: 03/23/99Page: 3-2 Copyright © 1999 Glenayre Print Date: 05/10/99v0222.hglFigure 3-1 PA Front Isometric View
Glenayre Document Number: 9110.01306 GL-T8200 1- to 25-Watt 900-MHz Power AmplifierRev. A: 03/23/99 DESCRIPTION25w82003Print Date: 05/10/99 Copyright © 1999 Glenayre Page: 3-3v0221.hglFigure 3-2 Top View of PA Board, Showing I/O3.2 Functional DescriptionThe RF amplifier circuitry of the power amplifier is contained within the PA chassis. Themonitoring of the RF amplifier system is accomplished by the digital exciter through thePA board located in the PA chassis. 3.2.1 RF PathThe PA chassis receives the exciter output at a rear-mounted type-N connector on the PAboard. The RF output power leaves the PA board through a type-N RF output connector. Ajumper delivers the signal to the lightning protector output on the cabinet.3.2.2 Signal and Power ConnectionsAll PA dc, signal monitoring, and control signals are routed through the PA board.
GL-T8200 1- to 25-Watt 900-MHz Power Amplifier Glenayre Document Number: 9110.01306DESCRIPTION Rev. A: 03/23/99Page: 3-4 Copyright © 1999 Glenayre Print Date: 05/10/993.2.3 Isolator intermodulation prevention An isolator receives the RF output of the PA chassis. It prevents intermodulation of the RFsignal that may occur from nearby transmissions and reduces radiated harmonics. A sampledetector circuit in the isolator reject load input monitors the reflected power (VSWR)present at the cabinet’s RF output connector. The VSWR RF sample is rectified and filtered,providing a dc voltage proportional to the VSWR connector on the third isolator, whichvoltage is supplied to the DSP exciter for transmitter control and monitoring. The VSWR-detection circuit of the third isolator is the only means of detecting whether there is anantenna fault, which can then be detected and reported. reject load The triple isolator provides the power amplifier module with a stable 50-ohm load. This isaccomplished by directing any reflections from the output line to a reject load. Hence, theload presented to the PA final transistor is always acceptable. power control An RF sample of the forward output signal is obtained from the forward-power coupler anddirected to the exciter, along with the reflected-power indication from the reflected-powercoupler. Control circuits within the DSP exciter evaluate the forward power and thereflected power and control the output power according to conditions. Additionally, if theDSP exciter detects an RF fault, it passes the report to the GL-C2000 and VDT for systemcontrol.
Glenayre Document Number: 9110.01306 GL-T8200 1- to 25-Watt 900-MHz Power AmplifierRev. A: 03/23/99 INSTALLATION AND SETUP25w82004Print Date: 05/11/99 Copyright © 1999 Glenayre Page: 4-14 INSTALLATION AND SETUP4.1 Cabinet Installation and External Cabling4.1.1 Tools and Equipment RequiredRefer to Table 4-1. Equipment listed by brand name may be substituted with equivalent.For installation, only common hand tools are necessary if at all, since equipment integrationis usually completed at the factory.4.1.2 InspectionRefer to the system manual.4.1.3 Rack PositioningRefer to the system manual also. Rackup variations are generally not possible. Cooling andcabling restraints require that equipment pieces remain racked according to standardconfigurations.4.1.4 External Cabinet Equipment CablingThe equipment items that comprise the paging transmitter are usually contained in onecabinet. This section describes the various input and output connections required to bringpower and signals into and out of the cabinet.Table 4-1 Required Tools and Equipmentnut driver - 5/16 in (7.9 mm)screwdriver - #2 flat blade and #3 flat bladescrewdriver - #2 Phillips and #3 PhillipsBird 4421 RF power meterBird 8327 dummy loadspectrum analyzerbarrel connector - type-N femalecable - 1 M long (max) with 7/16 Din to type-N male endsFluke 77 DVM7/16 DIN male-to-type-N female adapter
GL-T8200 1- to 25-Watt 900-MHz Power Amplifier Glenayre Document Number: 9110.01306INSTALLATION AND SETUP Rev. A: 03/23/99Page: 4-2 Copyright © 1999 Glenayre Print Date: 05/11/994.1.5 PA I/O ConnectionsRefer to Figure 4-1 and the appropriate rear views in the transmitter system manual. Mostconnections are made to the rear of the PA chassis. Table 4-2 lists PA connections.4.1.5.1 RF OutputConnect the antenna network to the lightning protector output. The connector is typically a7/16-inch DIN mounted on top of the transmitter cabinet. It should be securely tightened toa torque specification of 250 inch-pounds (2900 g-m).4.1.5.2 The RF Output Forward and Reflected Dc SamplesThe RF output forward and reflected dc sample from the isolator are digitized and routedto the DSP exciter. High reflected power from either the antenna network or the output ofthe PA causes reduced output and eventual shutdown.4.1.5.3 Signal and Dc ConnectionsBe certain that the connection between the exciter and the rear of the PA chassis is secure.Wiring details of the exciter/PA connector are shown in Table 4-3.Table 4-2 PA I/O Connectionsconnector name function noteRF input 200 mW type-N femaleRF out 25 W type-N femaleTO EXCITER J6 control See Table 4-3.+TB1-1 positive 28-Vdc input Anderson power pole (+) redGROUND TB1-2 power supply negative return Anderson power pole (-) blackauxiliary dc outputs auxiliary power See Table 4-4.fan supplies voltage to PA fan
Glenayre Document Number: 9110.01306 GL-T8200 1- to 25-Watt 900-MHz Power AmplifierRev. A: 03/23/99 INSTALLATION AND SETUP25w82004Print Date: 05/11/99 Copyright © 1999 Glenayre Page: 4-34.2 Setup4.2.1 Expected ExciterThe PA chassis is interfaced to the exciter. The connection is:• J6 to J6 for the DSP exciter.4.2.2 Setup Using VDTSetup of the PA is performed at the system level using a VDT. Refer to the VDT manualand screens, which include instructions for these applicable setup procedures:• adjust forward power• set low-power alarmFigure 3-2 shows controls, test points, and fuses on the PA board.Table 4-3 Exciter/PA Connector Pinout (For DSP Exciter)PA J6-x description direction PAJ6-x description direction1 analog 1 to exciter 9 analog 2 to exciter2 analog 3 to exciter 10 analog 4/aux. for C.S. to exciter3 AGC reference from exciter 11 PA fault to exciter4 PA ground 12 PA ground5 PA ground 13 mux select 1 from exciter6 mux select 2 from exciter 14 mux select 3 from exciter7 key input from exciter 15 nc8 reflected sample (combiner) to exciter
GL-T8200 1- to 25-Watt 900-MHz Power Amplifier Glenayre Document Number: 9110.01306INSTALLATION AND SETUP Rev. A: 03/23/99Page: 4-4 Copyright © 1999 Glenayre Print Date: 05/11/99 Figure 4-1 PA Rear View
Glenayre Document Number: 9110.01306 GL-T8200 1- to 25-Watt 900-MHz Power AmplifierRev. A: 03/23/99 INSTALLATION AND SETUP25w82004Print Date: 05/11/99 Copyright © 1999 Glenayre Page: 4-5 Table 4-4 PA Board FusesPA board fuse label connectionF1 (3A) powers remaining circuitry of PA boardF2 (5A) R9000 J2-2F3 (3A) RX J2-6F4 (5A) C2000 J2-8F5 (3A) DSP exciter J2-4F6 (3A) powers transistor, first stage and second stage of PA boardF7 (3A) powers remaining circuitry of PA board
GL-T8200 1- to 25-Watt 900-MHz Power Amplifier Glenayre Document Number: 9110.01306INSTALLATION AND SETUP Rev. A: 03/23/99Page: 4-6 Copyright © 1999 Glenayre Print Date: 05/11/99
Glenayre Document Number: 9110.01306 GL-T8200 1- to 25-Watt 900-MHz Power AmplifierRev. A: 03/23/99 OPERATION25w82005Print Date: 05/10/99 Copyright © 1999 Glenayre Page: 5-15OPERATION5.1 Controls and IndicatorsThe PA has no indicators nor controls which are suitable for user adjustment.5.2 OperationThe transmitter normally operates within the paging system in an unattended manner. Localcontrol is not intended for operation, but for setup, checkout, or maintenance. Refer to theappropriate section:•Section 7, MAINTENANCE•Section 8, CHECKOUT AND TROUBLESHOOTING•Section 9, REMOVAL AND REINSTALLATIONAlso refer to VDT manual.5.2.1 Turn PA On and OffPower is supplied to the transmitter and PA whenever the power supply is energized.5.2.2 Turn Fan On and OffThe fan does not contain an on/off switch, but turns on and off with the power supply. Thefan is not equipped with a thermal switch, it runs continuously whenever the power supplyequipment is energized.5.2.3 Key and Unkey PAThe PA does not contain a key switch, but is keyed and unkeyed by the presence of the RFoutput signal from the exciter when it is keyed. The exciter is normally keyed and unkeyedremotely through transmitter controller, but it can be keyed and unkeyed locally through avideo display terminal (VDT). Refer to the controller manual for remote key and unkeyinstructions, or to the DSP exciter VDT manual for local key and unkey instructions.
GL-T8200 1- to 25-Watt 900-MHz Power Amplifier Glenayre Document Number: 9110.01306OPERATION Rev. A: 03/23/99Page: 5-2 Copyright © 1999 Glenayre Print Date: 05/10/99
Glenayre Document Number: 9110.01306 GL-T8200 1- to 25-Watt 900-MHz Power AmplifierRev. A: 03/23/99 THEORY OF OPERATION25w82006Print Date: 05/10/99 Copyright © 1999 Glenayre Page: 6-16 THEORY OF OPERATION6.1 Power DistributionThe PA requires a primary 28-volt dc power input, which is typically provided by the acpower supply.6.1.1 Fan PowerFan power is received directly from the fan plug.6.1.2 High-Current Power to PA BoardPositive dc operating power is received through the Anderson power poles. The positiveside of the 28-volt supply enters through TB1-1 on the PA board. Power to the board isdistributed through fuses. Refer to Table 4-4.6.1.3 Metering Circuit RegulatorsThe PA board has three on-board regulators which supply power to several circuits on thePA board. Refer to Table 6-1 for the PA board voltages, test points, and functions.6.2 RF FlowRefer to Figure 6-1. The PA board receives its RF input through a type-N connector, via thePA chassis. A coupler reduces the RF input to an acceptable level. The RF input is amplifiedby means of two amplifier stages. A detector circuit in the input to the PA board monitorsthe RF input. The PA output is connected to the output type-N connector of the PA chassis.Table 6-1 PA Board Voltagesvoltage (Vdc) test point function (PA board unless specified otherwise)+36 J1-6 supply voltage for current-sensing op-amps+28 TB1-1 PA board +28-Vdc supply+5VREF J1-4 reference for measuring op-amps+5 J1-3 supply voltage for metering and control circuitsground TB1-2 ground
GL-T8200 1- to 25-Watt 900-MHz Power Amplifier Glenayre Document Number: 9110.01306THEORY OF OPERATION Rev. A: 03/23/99Page: 6-2 Copyright © 1999 Glenayre Print Date: 05/10/99 Figure 6-1 Simplified Power Amplifier Block Diagram6.3 PA BoardThe DSP exciter monitors currents, voltages, powers, and other valuable status informationfrom the power amplifier through the PA board. The two main functions of the PA boardare to channel information from the PA chassis to the exciter and to distribute dc power tothe exciter, R9000, receiver and C2000.Most of the information passed to the exciter is in the form of voltages that representpowers, currents, supply voltages and temperature. This information is multiplexed in thePA board onto two analog lines that feed the exciter’s analog-to-digital converter (ADC).The PA board also detects overcurrent and high reflected power conditions in the PA. Oncethis condition is detected, the PA board pulls a PA fault line high initiating an interrupt inthe exciter. This interrupt causes the exciter to reduce power or shut the transmitter downto protect it from damage.
Glenayre Document Number: 9110.01306 GL-T8200 1- to 25-Watt 900-MHz Power AmplifierRev. A: 03/23/99 THEORY OF OPERATION25w82006Print Date: 05/10/99 Copyright © 1999 Glenayre Page: 6-36.3.1 Input Voltage dc power input Refer to Figure 6-2. The +28-volt supply voltage from the main power supply feeds thedistribution circuitry on the PA board through an Anderson power pole. The negative sideof the supply is grounded to the black (-) connection. The positive side of the supply goesto the red (+) connection and on to the distribution circuitry on the PA board. fuses The +28-volt supply is distributed throughout the PA board through current monitoringcircuits and fuses. The +28-volt supply voltage is also used in the metering circuitry. Referto fuse information in Table 4-4. internal voltages The internal supply voltages described in Paragraph 6.3.2 are derived from the mainsupply line. Refer to Table 6-1 for more information concerning the PA board regulators,voltages, and test points.6.3.2 Internally Generated Voltages6.3.2.1 +36-Volt Internal SupplyThe +36-volt supply is derived with a voltage doubling circuit. This supply has a very lowcurrent since it only drives the current monitoring op-amps in the PA board. These op-ampsmonitor the current of transistors Q1 and Q2 from the high side of the 28-volt supply, andtherefore require a supply higher voltage. The +36-volt supply can be monitored at J1-6with reference to ground6.3.2.2 +5-Volt Precision Reference Internal SupplyThe +5-volt reference supply also supplies very little current and is used for fault detec-tions, where the trip point is critical. The +5-volt reference supply can be monitored at J1-4 with reference to ground.6.3.2.3 +5-Volt Internal SupplyThe +5-volt supply has to supply approximately 1 ampere at 5 volts to portions of the PAboard. Filtering is required to keep RF from getting onto the PA board circuitry. The +5-volt supply can be monitored at J1-3 with reference to ground.6.3.2.4 +28-Volt SupplyThe +28-volt supply is monitored by the multiplexer 0 on the PA board. The +28-voltsupply can be monitored at TB1-1.
GL-T8200 1- to 25-Watt 900-MHz Power Amplifier Glenayre Document Number: 9110.01306THEORY OF OPERATION Rev. A: 03/23/99Page: 6-4 Copyright © 1999 Glenayre Print Date: 05/10/99 sheet1.pltFigure 6-2 PA Board Functional Diagram
Glenayre Document Number: 9110.01306 GL-T8200 1- to 25-Watt 900-MHz Power AmplifierRev. A: 03/23/99 THEORY OF OPERATION25w82006Print Date: 05/10/99 Copyright © 1999 Glenayre Page: 6-5 sheet2.pltFigure 6-2, PA Board Functional Diagram (continued)
GL-T8200 1- to 25-Watt 900-MHz Power Amplifier Glenayre Document Number: 9110.01306THEORY OF OPERATION Rev. A: 03/23/99Page: 6-6 Copyright © 1999 Glenayre Print Date: 05/10/996.4 Exciter Interface The physical interface is a 15-pin, filtered male connector on the exciter and the PA chassis.15-pin connector J6 is mounted on the PA board.More information concerning the DSP exciter interface connector pinout is given inParagraph 6.4.1. For information on setting the PA to expect the standard DSP exciter,refer to Paragraph 4.2.1.6.4.1 Exciter Interface Connector PinoutRefer to Table 4-3. The interface connector pin numbers refer to the 15-pin exciter/PAinterface connector on the rear of the PA chassis and the DSP exciter.6.4.1.1 Analog 1 OutputPins 1 (+) of the D-sub 15-pin interface connector is the analog 1 output from multiplexer0 on the PA board. The output voltage range is 0-5 volts for the + pin, the - pin is referencedto PA ground. The analog value on the multiplexer output may be one of eight differentchannels and is selected by the microcontroller through the multiplexor select lines 0-2.6.4.1.2 Analog 3 OutputPins 2 (+) of the D-sub 15-pin interface connector is the analog 3 output which goes to J6-2 and is used for customer specials. The output voltage range is 0-5 volts for the (+) pin,the (-) pin is referenced to PA ground. This analog output operation is the same as theanalog 0 output described above.6.4.1.3 Mux Select Lines 0-2Pins 13, 6, and 14 of the D-sub 15-pin interface connector are multiplex lines 0 through 2,respectively. These input lines from the exciter are digital in nature and are used to selectthe appropriate channel of the analog multiplexers on the PA board.6.4.1.4 PA Fault InterruptPin 11 of the D-sub 15-pin interface connector is the chassis fault-interrupt output line. Thisoutput goes from LO to HI to indicate that a high VSWR or high-current condition hasoccurred in the PA. This output is digital in nature and drives an interrupt input to the micro-controller in the exciter. This output from the PA board is ORed with the other PA boardfault outputs; therefore only one line has to be active to indicate a fault.6.5 Analog Readings ThresholdsRefer to Table 6-2.
Glenayre Document Number: 9110.01306 GL-T8200 1- to 25-Watt 900-MHz Power AmplifierRev. A: 03/23/99 THEORY OF OPERATION25w82006Print Date: 05/10/99 Copyright © 1999 Glenayre Page: 6-76.5.1 PA Board CurrentsThe currents monitored in the PA board have various upper limits, as shown in Table 6-2.They are read on the VDT screen. When one or more of these thresholds is met, it causesan interrupt to the microcontroller in the exciter, which then reduces output power until thefault condition no longer exists or until shutdown occurs. As of this printing, no lowercurrent limit has been programmed.6.5.2 PA Forward PowerThe PA board forward and reflected samples are digitized and sent out the I20 interface.The forward power reading from the PA board has a lower limit which is determined by theforward power setting of the transmitter. This limit is based on efficiency and losses in thePA. The lower limit is 1 watt. The upper limit for the forward power reading is 25 watts.This does not cause an interrupt to the exciter, but if a reading exceeds this level, the excitershuts the transmitter down.6.5.3 PA Reflected PowerThe reflected power reading in the PA has a lower limit of 0 W, and an upper limit of 5 Waverage power. When this limit is achieved, it initiates an interrupt to the microcontrollerin the exciter which reduces power until the fault goes away or until a shutdown conditionoccurs.6.5.4 PA Board RF Input PowerThe input power to the PA has a lower limit of 200 mW. If the threshold is not reached, thePA shuts down.6.5.5 +28-Volt External SupplyThe upper limit of the PA’s 28 volt supply is +29 volts, and the lower limit is +22 volts.Excursions outside these limits are a fault state. The transmitter shuts down.6.5.6 +36-Volt Internal SupplyThe +36 volt supply to the current metering op-amps has a window of +33 volts and +39volts. When these limits have been exceeded, it results in an alarm condition only, no powerreduction.
GL-T8200 1- to 25-Watt 900-MHz Power Amplifier Glenayre Document Number: 9110.01306THEORY OF OPERATION Rev. A: 03/23/99Page: 6-8 Copyright © 1999 Glenayre Print Date: 05/10/996.5.7 +5-Volt Internal SuppliesBoth of the +5-volt supplies in the PA have an alarm window of +5.5 and +4.5 volts.Exceeding either parameter results in an alarm condition only.6.5.8 TemperatureThe ambient temperature in the PA has an upper limit of +85 C. If this limit is exceeded,the transmitter shuts down.Table 6-2 Metered Parameter Thresholdsanalog readingupper threshold lower thresholdPA PAtotal forward power (W) 25 1total reflected power (W) 5 0PA current Q1 1.6 nonePA current Q2 3.3 none+36 Vdc 39 33+28 Vdc 29 22+5 Vdc 5.5 4.5temperature 80o (alarm)85o (fault) -30o
Glenayre Document Number: 9110.01306 GL-T8200 1- to 25-Watt 900-MHz Power AmplifierRev. A: 03/23/99 MAINTENANCE25w82007Print Date: 03/26/99 Copyright © 1999 Glenayre Page: 7-17 MAINTENANCEIf the PA becomes faulty, get a replacement from Glenayre customer service.7.1 CleaningThe PA chassis should be kept clean and free of dust. Dust and dirt can reduce the coolingefficiency of the PA which can lead to module failure. Dirt on the printed circuit boards canalso lead to other types of failures. Most dust and dirt can be removed with a vacuumcleaner. Do not use air pressure to blow dust and dirt from the module, because it allowsdust to resettle on other equipment which may have already been cleaned.7.2 Power CalibrationThe complete power calibration was done with precise measuring equipment at the factory;the accuracy exceeds that of field-quality test equipment. Refer to the DSP exciter usermanual for details. The transmitter is adjusted to the desired power via the video displayterminal.
GL-T8200 1- to 25-Watt 900-MHz Power Amplifier Glenayre Document Number: 9110.01306MAINTENANCE Rev. A: 03/23/99Page: 7-2 Copyright © 1999 Glenayre Print Date: 03/26/99
Glenayre Document Number: 9110.01306 GL-T8200 1- to 25-Watt 900-MHz Power AmplifierRev. A: 03/23/99 CHECKOUT AND TROUBLESHOOTING25w82008Print Date: 05/10/99 Copyright © 1999 Glenayre Page: 8-18 CHECKOUT AND TROUBLESHOOTING8.1 IntroductionCheckout procedures can be performed at any time to verify that the power amplifier (andtransmitter) is functioning properly. After the checkout procedures are successfullycompleted, the site can be returned to normal service. Pursue any troubleshootingprocedure provided or referenced, which is a direct result of a failed checkout procedurebefore trying to complete the checkout procedure.The following procedures presume that the installation and setup procedures in section 4 ofthis manual have already been successfully completed. Refer to the DSP exciter VDT usermanual for more checkout procedures.8.2 Checkout Procedures8.2.1 VDT Power-Up VerificationOnce powered, verify that the VDT is powered. Check list below:• the VDT should have a cursor displayed and blinking• or the VDT should have an instructional prompt displayed• or the VDT should have an auto-loaded program running.8.2.2 Dc Voltage VerificationOnce powered, verify that the fan is operating. The fan is located on the rear of the PA. Alsoinsure that air flow is not obstructed inside or outside of the transmitter cabinet, around thecabinet vents, and in the heat sink cooling fins of the PA.8.3 Troubleshooting ProceduresConnect the VDT to the VT-100 connector on the front panel of the DSP exciter. Check thepower amplifier parameters using the VDT, refer to the DSP exciter VDT user manual forassistance in using the VDT menus for troubleshooting.8.3.1 Parameter Readings at Time of FaultWhen the DSP exciter receives a fault indication from the transmitter or exciter, it recordsall of the transmitter parameters at that instant. This is a valuable source of PA trouble-shooting data and should always be checked when transmitter problems occur. Connect theVDT to the VT-100 connector on the front panel of the exciter to access the transmitter faultinformation. Refer to the DSP exciter VDT user manual for assistance in reading the trans-mitter faults. Check the transmitter fault parameters against the normal transmitteroperating parameters. The normal transmitter operating parameters can be obtained fromthe factory transmitter test data sheets; or (if available) from the transmitter parameters logmentioned in sections 4 and 7 of this manual.
GL-T8200 1- to 25-Watt 900-MHz Power Amplifier Glenayre Document Number: 9110.01306CHECKOUT AND TROUBLESHOOTING Rev. A: 03/23/99Page: 8-2 Copyright © 1999 Glenayre Print Date: 05/10/998.3.2 GL-C2000 Transmitter Controller AlarmsAnother valuable source of PA troubleshooting data is the GL-C2000 alarm history. It isaccessed by connecting the VDT to the VT-100 connector on the front panel of the GL-C2000 transmitter controller. Consult the GL-C2000 user manual for assistance inaccessing the controller alarm history.If the GL-C2000 has a telephone line connected to its modem output, its alarm history canbe accessed remotely through the use of the Glenayre GL-N2000 console, or with acomputer which is running a communication program with VT-100 emulation and has a2400-baud modem.The GL-N2000 console equipped with version 3.5 or later software can also perform anover-the-air connection if telephone lines are not connected to the GL-C2000 controller.8.3.3 Operational ChecksIf the transmitter is operational, valuable troubleshooting information can be obtained bycomparing the present transmitter operating parameters, obtained through the exciter VDTconnection, to the parameters from the factory transmitter data sheets; or (if available) fromthe transmitter parameters log.8.3.4 Power Amplifier Current MeasurementRefer to Table 8-1, PA Board Current. The PA board has provisions to measure the currentflow of the first and second stage.Table 8-1 PA Board CurrentPA board function transistor current measuredfirst stage measure Q1 currentsecond stage measures Q2 current
Glenayre Document Number: 9110.01306 GL-T8200 1- to 25-Watt 900-MHz Power AmplifierRev. A: 03/23/99 REMOVAL AND REINSTALLATION25w82009Print Date: 03/26/99 Copyright © 1999 Glenayre Page: 9-19 REMOVAL AND REINSTALLATIONCautionWhen fastening dc connectors, be certain that theplug is centered directly on its corresponding jackand that the polarity is correct. Do not make dcconnections while power is applied to the chassis.The PA is secured to the rails by eight screws.9.1 PA9.1.1 RemovalNoteBefore removing the PA as a result of fault isolation, be certain that thefault is with it. The exciter and interconnecting wiring are essential toproper operation of the power amplifier.1. Loosen the eight screws on the front of the PA.2. Disconnect I20, dc power in, dc power out, RF in, and RF out from the back of the PA.3. Pull PA out of rack until it is completely out.9.1.2 Reinstallation1. Place PA into location in rack.2. Put in eight screws and lightly fasten.3. Attach I20, dc power in, dc power out, RF in and RF out to the back of the PA.4. Tighten screws.This procedure is complete. Check out the transmitter to see that it functions properly.
GL-T8200 1- to 25-Watt 900-MHz Power Amplifier Glenayre Document Number: 9110.01306REMOVAL AND REINSTALLATION Rev. A: 03/23/99Page: 9-2 Copyright © 1999 Glenayre Print Date: 03/26/99
Print Date: 03/24/99 Copyright © 1999 GlenayreGL-T8200 1- to 25-Watt 900-MHz Transmitter System Rev. A: 03/24/99Specifications subject to change without noticeCopyright © 1999 GlenayreAll 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.GL-T82001- to 25-Watt 900-MHz Transmitter SystemUSER MANUALPN 9110.01305 REV A
GL-T8200 1- to 25-Watt 900-MHz Transmitter System Glenayre Document Number: 9110.01305Document Change Record Rev. A: 03/24/99 Copyright © 1999 Glenayre Print Date: 03/24/99Document Change RecordRevision: ADate: 03/24/99Changes: none; original
Glenayre Document Number: 9110.01305 GL-T8200 1- to 25-Watt 900-MHz Transmitter System Rev. A: 03/24/99 Table of Contents8200sys1.tocPrint Date: 04/14/99 Copyright © 1999 Glenayre Page: -iTable of Contents1 GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11.1 Manual Scope . . . . . . . . . . . . . . . . . . . . . . . . 1-11.2 Applicable Documents. . . . . . . . . . . . . . . . . . . . . 1-11.3 Manual Sections . . . . . . . . . . . . . . . . . . . . . . . 1-11.4 About Glenayre . . . . . . . . . . . . . . . . . . . . . . . 1-21.4.1 Product Warranty Information . . . . . . . . . . . . . . . . . . .1-31.4.2 Service Warranty Information . . . . . . . . . . . . . . . . . . .1-31.5 Regulatory-Authority Compliance . . . . . . . . . . . . . . . . 1-31.5.1 FCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-31.5.2 Industry Canada. . . . . . . . . . . . . . . . . . . . . . . . . . .1-31.5.3 Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-32 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13 +DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13.1 Physical Description. . . . . . . . . . . . . . . . . . . . . . 3-13.1.1 Mounting Provisions . . . . . . . . . . . . . . . . . . . . . . . .3-13.1.2 Exciter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-13.1.3 Power Amplifier (PA). . . . . . . . . . . . . . . . . . . . . . . .3-23.1.4 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-23.1.5 Video Display Terminal (VDT). . . . . . . . . . . . . . . . . . .3-23.2 Simplified Paging-Site Functional Description . . . . . . . . . . . 3-23.2.1 Paging Site . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-23.2.2 Link Equipment and Transmitter Controller . . . . . . . . . . . .3-23.2.3 Paging Transmitter . . . . . . . . . . . . . . . . . . . . . . . . .3-43.2.4 Video Display Terminal. . . . . . . . . . . . . . . . . . . . . . .3-43.2.5 Ac Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . .3-43.3 Site Signal Flows . . . . . . . . . . . . . . . . . . . . . . . 3-43.3.1 Site RF-Signal Flow. . . . . . . . . . . . . . . . . . . . . . . . .3-43.3.2 Site Audio/Modulation-Signal Flow . . . . . . . . . . . . . . . .3-53.3.3 Simplified Block-Diagram Description. . . . . . . . . . . . . . .3-63.3.4 Site Control-Signal Flow . . . . . . . . . . . . . . . . . . . . . .3-73.3.5 Status-Signal Flow . . . . . . . . . . . . . . . . . . . . . . . . .3-74 INSTALLATION AND SETUP . . . . . . . . . . . . . . . . . . . . . . . . . 4-14.1 Site Checks . . . . . . . . . . . . . . . . . . . . . . . . . 4-14.1.1 Transmitter Environment . . . . . . . . . . . . . . . . . . . . . .4-14.1.2 Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
GL-T8200 1- to 25-Watt 900-MHz Transmitter System Glenayre Document Number: 9110.01305Table of Contents Rev. A: 03/24/99Page: -ii Copyright © 1999 Glenayre Print Date: 04/14/994.1.3 Primary Power Requirement . . . . . . . . . . . . . . . . . . . . 4-14.2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . 4-24.2.1 Tools and Equipment Required. . . . . . . . . . . . . . . . . . . 4-24.2.2 Rack Positioning . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24.2.3 Rack Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24.2.4 Positioning within the Rack . . . . . . . . . . . . . . . . . . . . 4-34.2.5 Equipment Cabling . . . . . . . . . . . . . . . . . . . . . . . . . 4-34.3 Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-44.4 Ultimate Disposition . . . . . . . . . . . . . . . . . . . . . 4-45 OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15.1 Controls and Indicators . . . . . . . . . . . . . . . . . . . . 5-15.2 Operation . . . . . . . . . . . . . . . . . . . . . . . . . 5-15.2.1 Turn Transmitter On and Off . . . . . . . . . . . . . . . . . . . . 5-15.2.2 Turn Fans On and Off . . . . . . . . . . . . . . . . . . . . . . . 5-15.2.3 Key and Unkey PA . . . . . . . . . . . . . . . . . . . . . . . . . 5-16 THEORY OF OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16.1 Cabinet Power Distribution . . . . . . . . . . . . . . . . . . 6-16.1.1 Ac Power Input . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16.1.2 Dc Power Distribution . . . . . . . . . . . . . . . . . . . . . . . 6-16.2 Cabinet Signal Distribution . . . . . . . . . . . . . . . . . . 6-16.2.1 Control, Data, and Modulation Paths. . . . . . . . . . . . . . . . 6-16.2.2 Alarm Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . 6-17 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-17.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . 7-17.2 Maintenance Procedures. . . . . . . . . . . . . . . . . . . . 7-17.2.1 PA Current Check . . . . . . . . . . . . . . . . . . . . . . . . . 7-17.2.2 Dc Ripple Check . . . . . . . . . . . . . . . . . . . . . . . . . . 7-18 CHECKOUT AND TROUBLESHOOTING . . . . . . . . . . . . . . . . . . 8-18.1 Preparation for Checkout Procedures. . . . . . . . . . . . . . . 8-18.1.1 Dc-Voltage Verification . . . . . . . . . . . . . . . . . . . . . . 8-18.1.2 VDT Power-up Verification . . . . . . . . . . . . . . . . . . . . 8-18.1.3 Cooling-Fan Check . . . . . . . . . . . . . . . . . . . . . . . . . 8-18.2 Operational Verification. . . . . . . . . . . . . . . . . . . . 8-18.2.1 RF Power and Antenna . . . . . . . . . . . . . . . . . . . . . . . 8-28.2.2 Paging. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-28.3 Field Replacement of Assemblies . . . . . . . . . . . . . . . . 8-2
Glenayre Document Number: 9110.01305 GL-T8200 1- to 25-Watt 900-MHz Transmitter System Rev. A: 03/24/99 Table of Contents8200sys1.tocPrint Date: 04/14/99 Copyright © 1999 Glenayre Page: -iii9 REMOVAL AND REINSTALLATION. . . . . . . . . . . . . . . . . . . . . 9-19.1 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . 9-19.2 Exciter Removal and Reinstallation. . . . . . . . . . . . . . . . 9-19.3 PA Removal and Reinstallation . . . . . . . . . . . . . . . . . 9-2
GL-T8200 1- to 25-Watt 900-MHz Transmitter System Glenayre Document Number: 9110.01305Table of Contents Rev. A: 03/24/99Page: -iv Copyright © 1999 Glenayre Print Date: 04/14/99
Glenayre Document Number: 9110.01305 GL-T8200 1- to 25-Watt 900-MHz Transmitter System Rev. A: 03/24/99 List of Figures8200sys1.lofPrint Date: 04/14/99 Copyright © 1999 Glenayre Page: -vList of FiguresFigure 3-1 Transmitter Front View . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3Figure 3-2 Transmitter Simplified Block Diagram . . . . . . . . . . . . . . . . . . 3-6Figure 4-1 Rear View Showing Dc and Signal Connections . . . . . . . . . . . . . 4-5
GL-T8200 1- to 25-Watt 900-MHz Transmitter System Glenayre Document Number: 9110.01305List of Figures Rev. A: 03/24/99Page: -vi Copyright © 1999 Glenayre Print Date: 04/14/99
Glenayre Document Number: 9110.01305 GL-T8200 1- to 25-Watt 900-MHz Transmitter System Rev. A: 03/24/99 List of Tables8200sys1.lotPrint Date: 04/14/99 Copyright © 1999 Glenayre Page: -viiList of TablesTable 1-1 Applicable Documents . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1Table 1-2 Manual Sections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2Table 2-1 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1Table 3-1 Site Equipment List . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1Table 4-1 Required Tools and Equipment. . . . . . . . . . . . . . . . . . . . . . 4-2
GL-T8200 1- to 25-Watt 900-MHz Transmitter System Glenayre Document Number: 9110.01305List of Tables Rev. A: 03/24/99Page: -viii Copyright © 1999 Glenayre Print Date: 04/14/99
Glenayre Document Number: 9110.01305 GL-T8200 1- to 25-Watt 900-MHz Transmitter System Rev. A: 03/24/99 GENERAL8200sys1Print Date: 05/10/99 Copyright © 1999 Glenayre Page: 1-11GENERAL1.1 Manual ScopeThis manual provides information for the following transmitter:• 1 to 25-watt, 900-MHz transmitter, model GL-T8200.1.2 Applicable DocumentsThis manual is incomplete without additional manuals. Refer to Table 1-1 for a list ofapplicable documents, their part numbers, and a brief description of each.1.3 Manual SectionsRefer to Table 1-2. This table lists the sections in this manual, and provides a brief descrip-tion of the content of each section.Table 1-1 Applicable Documentsdocument part number description9100.XXXXX 9100.XXXXX assembled GL-T8200 manual. Requestors should ask for option manuals which match their configuration.GL-T8200 system manu-al 9110.001305 this documentDSP VDT manual 9110.00259 describes DSP exciter software installed in exciterDSP exciter User Manual 9110.01021 describes DSP exciter hardware equipment in transmitterGL-C2000 User Manual 9110.01248 describes GL-C2000 controller hardware and softwareGL-T8200 power ampli-fier manual 9110.001306 describes 1 to 25 watt, 900-MHz power amplifierpower supply manual 9110.00622 describes GL2728 power supply equipment
GL-T8200 1- to 25-Watt 900-MHz Transmitter System Glenayre Document Number: 9110.01305GENERAL Rev. A: 03/24/99Page: 1-2 Copyright © 1999 Glenayre Print Date: 05/10/991.4 About GlenayreQuestions regarding the equipment or this manual should be directed to:U.S.A. CANADAGlenayre Customer Service - RF Glenayre Customer Service - RFOne Glenayre Way 1450 Kootenay StreetQuincy, Illinois 62305-3726 Vancouver, B.C.V5K 4R1Phone: (217) 223-3211 Phone: (604) 293-1611Fax: (217) 221-6259 Fax: (604) 293-4301UNITED KINGDOM SINGAPOREGlenayre Electronics (UK) Ltd. Glenayre Electronics Pte Ltd.Unit 22, Challenge House No. 8 Ang Mo Kio Sherwood Drive Industrial Park 2Bletchley, Milton Keynes, MK3 6JD 569500 SingaporePhone: 44 (1908) 484800 Phone: 65 483-8787Fax: 44 1908 484801 Fax: 65 483-9663For additional Glenayre contacts, refer to www.glenayre.com/corporate/contacts/default.asp .Table 1-2 Manual Sectionssection contents1. General introduction and purpose of manual2. Specifications significant system measurements; also see individual equip-ment manuals3. Description introduction and principle characteristics of the equipment4. Installation & Setup initial installation and activation of the equipment5. Operation operation of equipment6. Theory of Operation detailed functional description of transmitter7. Maintenance procedures to be performed on specific intervals to maintain optimum performance of the equipment8. Checkout and Trouble-shooting verification of proper operation, correction to proper opera-tion9. Removal and Reinstal-lation replacement procedures for assemblies which do not have their own, separate equipment manuals
Glenayre Document Number: 9110.01305 GL-T8200 1- to 25-Watt 900-MHz Transmitter System Rev. A: 03/24/99 GENERAL8200sys1Print Date: 05/10/99 Copyright © 1999 Glenayre Page: 1-31.4.1 Product Warranty InformationGlenayre warrants to the original purchaser that Glenayre products are free from defects inmaterial and workmanship for a period of twenty-four months from the original invoicedate, subject to the provisions herein. Glenayre will repair or replace at its option, FOB ourfactory, free of charge within one year from the date of shipment, any component, assemblyor subassembly of our manufacture found to be defective under conditions of normal use.The unit, if repaired, will be returned to its original specifications. Failures caused by unau-thorized modifications, force majeure, lightning, physical, environmental, or electricaldamage including use with incompatible equipment are specifically excluded from thiswarranty. Glenayre disclaims any and all liability for loss or other damage whether direct,consequential or of any nature whatsoever, resulting from product failure.This warranty is in lieu of all other warranties expressed or implied and covers only thoseitems manufactured by Glenayre. Equipment supplied by, but not manufactured byGlenayre, is subject only to any warranty offered by the manufacturer of said equipment.1.4.2 Service Warranty InformationReturn of a defective item must be authorized by Glenayre prior to shipment. A ReturnAuthorization number can be obtained from Glenayre Customer Service. When requestinga Return Authorization number, give the serial number of the unit. A description of the faultshould accompany the unit on its return and the RA number must be shown on labelsattached to the item(s). The cost of shipping to Glenayre is to be paid by the customer.Shipping from Glenayre will be prepaid by the customer, and shipped via surface mail. Ifexpress shipping is required, the unit will be shipped collect.Any repair service performed by Glenayre under this limited warranty is warranted to befree from defects in material or workmanship for ninety days from the date of repair. Allother terms of this limited warranty apply to the service warranty.1.5 Regulatory-Authority Compliance1.5.1 FCCRefer to Table 2-1 for authorizations.1.5.2 Industry CanadaRefer to Table 2-1 for authorizations.1.5.3 OtherRefer to Table 2-1 for authorizations. Type approvals have been applied for in all majormarkets. Refer to Paragraph for more information.
GL-T8200 1- to 25-Watt 900-MHz Transmitter System Glenayre Document Number: 9110.01305GENERAL Rev. A: 03/24/99Page: 1-4 Copyright © 1999 Glenayre Print Date: 05/10/99
Glenayre Document Number: 9110.01305 GL-T8200 1- to 25-Watt 900-MHz Transmitter System Rev. A: 03/24/99 SPECIFICATIONS8200sys2Print Date: 05/10/99 Copyright © 1999 Glenayre Page: 2-12 SPECIFICATIONSTable 2-1 contains transmitter and power supply specifications. The ac power supply is apurchased item. Refer to the power supply manual, PN 9110.00622, for more specifica-tions. Refer also to the exciter and PA manuals for detailed specifications. Test andmeasurement equipment is, where possible, calibrated in accordance with standards estab-lished by the National Institute of Standards and Technology (NIST).Table 2-1 Specificationscharacteristic (unit of measurement) condition, model specificationElectricalRF output power (W) continuous duty, at PA RF output connector 1-25Physical and Environmentaldimensions 16 RU in standard EIA cabinet (can be re-duced to 14 RU in non-standard configura-tions)28 x 19 x 9 in (71 x 48 x 22 cm)weight 50 lb (23 kg)elevation continuous operation at rated power to 10,000 ft (3050 m) (see temperature der-ating factor)temperature operating -30 to +60 degrees Cstorage -30 to +70 degrees Ctemperature derat-ing factor above 5000 ft (1525 m) 0.5 degrees C per 100 mhumidity operating, noncon-densing 5 to 95%Certificationcountry model identifierUSA GL-T8200 BFL-GL-T8200Canada GL-T8200
GL-T8200 1- to 25-Watt 900-MHz Transmitter System Glenayre Document Number: 9110.01305SPECIFICATIONS Rev. A: 03/24/99Page: 2-2 Copyright © 1999 Glenayre Print Date: 05/10/99other Contact Glenayre Sales for country-by-country type-approval infor-mationElectrical (power supply)ac input voltage (Vac) 195 to 265ac input frequency (Hz) 47 to 440ac input current (A) 4 max at 195 Vac to 265 VacTable 2-1 Specifications (continued)characteristic (unit of measurement) condition, model specification
Glenayre Document Number: 9110.01305 GL-T8200 1- to 25-Watt 900-MHz Transmitter System Rev. A: 03/24/99 +DESCRIPTION8200sys3Print Date: 05/10/99 Copyright © 1999 Glenayre Page: 3-13 +DESCRIPTIONThe purpose of the paging transmitter is to provide a modulated, high-level RF signal,which sets off pagers within the coverage area of its associated antenna. The paging trans-mitter receives modulation and control information from the transmitter controller, whichreceives information from a control site. In a simulcasting environment, the control sitemay feed several paging sites at once.3.1 Physical DescriptionFigure 3-1 shows a front view of the PA chassis. Refer to the transmitter ID label on therear of the unit for identification purposes.3.1.1 Mounting Provisions3.1.1.1 Transmitter ControllerThe transmitter controller, normally a GL-C2000, is mounted above the exciter and may bepackaged with blank panels. 3.1.2 ExciterThe exciter is one rack unit high. It is racked where shown and is held in place with fourmachine screws. The top cover is removable for access to subassemblies, jumpers, andadjustments contained in the unit. All but one of its connectors are on the back of the unit.The front of this unit has a connector which allows the VDT to be connected to it.Table 3-1 Site Equipment Listequipment part number functionpower amplifierGL-T8200 1000.02186 amplifies 900 MHz RF for broadcast digital DSP exciter with I20 option DSP EX/I20 OPT generates then modulates RF; controls PA I/O activities, receives fault signals and takes action based on statusGL-S2164 Receiver See receiver manual for configurations and part No.receives data and commands from the system controllerGL-C2000 (typical)transmitter controller GL-C2000 controls paging transmitter activities;performs I/O functions for paging sitepower supply module ac switching power supply which converts main power to dc voltage for the transmit-ter
GL-T8200 1- to 25-Watt 900-MHz Transmitter System Glenayre Document Number: 9110.01305+DESCRIPTION Rev. A: 03/24/99Page: 3-2 Copyright © 1999 Glenayre Print Date: 05/10/993.1.3 Power Amplifier (PA)The transmitter PA is mounted in the rack by screws which are inserted into the anglebrackets on either side of the chassis. Access to PA fuses is gained from the front; access tothe fan and I/O connections is from the rear.A chassis-mounted fan draws air across the PA heat sink and out the back.Most exciter and PA fault isolations can be performed with the units mounted in the rack.It is not recommended to troubleshoot the PA if is is defective. A defective PA should besent back to Glenayre.3.1.4 Power SupplyThe power supply is contained in a separate chassis which is mounted separately from thetransmitter, normally as the lowest assembly in the rack. The power supply used is an acswitching power supply which converts main power to dc voltage for the transmitter. Referto power supply manuals for details.3.1.5 Video Display Terminal (VDT)A video display terminal (VDT) is not part of the racked-up equipment; instead, it is a pieceof test equipment which the user brings to the site when setup, maintenance, or trouble-shooting is necessary; or it is used as a monitoring device. Refer to the VDT manual fordetails, including cable requirements.3.2 Simplified Paging-Site Functional Description3.2.1 Paging SiteThe following paragraphs provide a block diagram-level functional description of a typicalpaging site.Refer to Figure 3-2. This figure shows basic signal flows between the various paging siteequipment pieces. The communications device which the transmitter uses in order tocommunicate with the control site is not shown and may vary from application toapplication.3.2.2 Link Equipment and Transmitter ControllerA link receiver, satellite receiver, microwave drop, telephone link, or other similar deviceis used for communication between the transmitter controller and the control site. Theparticular device depends on the application.The transmitter controller is typically a model GL-C2000. There are various ways of inter-facing the transmitter controller to the I/O portions of the exciter. Refer to the transmittercontroller manual and the exciter manual for details.
Glenayre Document Number: 9110.01305 GL-T8200 1- to 25-Watt 900-MHz Transmitter System Rev. A: 03/24/99 +DESCRIPTION8200sys3Print Date: 05/10/99 Copyright © 1999 Glenayre Page: 3-3Figure 3-1 Transmitter Front View
GL-T8200 1- to 25-Watt 900-MHz Transmitter System Glenayre Document Number: 9110.01305+DESCRIPTION Rev. A: 03/24/99Page: 3-4 Copyright © 1999 Glenayre Print Date: 05/10/993.2.3 Paging TransmitterThe paging transmitter converts the digital signal from the transmitter controller intomodulated and amplified RF power. Operation is in response to commands from the transmitter controller via the DSP exciter.The transmitter monitors its functions and reports its status to the VDT and the GL-C2000via the exciter. The transmitter controller permits the transmitter to be controlled andmonitored from a remote location. Local control and monitoring are performed through aVT-100 video deplay terminal (VDT).The DSP exciter combines functions of an RF exciter and a PA controller. The excitergenerates modulation using digital signal processing (DSP) to achieve accurate, stablemodulation that does not vary with time or temperature. The PA-control section monitorstransmitter status signals in the form of fault logic and voltage samples. The microprocessorin the exciter reports PA status to the transmitter controller, VDT, and the exciter frontpanel. If a malfunction occurs, the transmitter enters a reduced operating condition,depending on the seriousness of the fault. PA control and status monitoring are performedby the microprocessor, which consolidates control logic from the transmitter controller orthe locally operated VDT. Both the exciter and transmitter controller receive continuousstatus reports from the microprocessor. The exciter is the control and status-monitoringinterface between the transmitter and the user.The DSP exciter provides up to 400 milliwatts of RF drive.A power-reference signal from the PA is fed back to the exciter, via the PA board, to allowcontrol and monitoring of output power. The exciter-supplied control voltage functions asAGC control for the PA.3.2.4 Video Display TerminalThe VDT, though not part of the transmitter, is required for setup, local control, and localmonitoring of the transmitter. The VDT can be any laptop or desktop terminal with a VT-100 type program. The VDT interfaces the transmitter through the connector on the frontof the exciter. The VDT software is menu-driven.3.2.5 Ac Power SupplyRefer to Figure 3-1. The switching power supply is mounted below the PA. The powersupply is two rack units high. The front panel contains a dc power on indicator.3.3 Site Signal Flows3.3.1 Site RF-Signal FlowThe on-frequency carrier is created by the VCO circuitry in the DSP exciter. It is thenmodulated with paging information, amplified, and sent to the PA via connector J3 on theback of the DSP exciter. Through coaxial cable, the carrier goes to the back of the PA,where it is further amplified to a preset level under control of a microprocessor within theexciter. The amplified carrier is cabled from the PA output to a low-pass filter and a triple
Glenayre Document Number: 9110.01305 GL-T8200 1- to 25-Watt 900-MHz Transmitter System Rev. A: 03/24/99 +DESCRIPTION8200sys3Print Date: 05/10/99 Copyright © 1999 Glenayre Page: 3-5isolator and then to a cabinet-mounted lightning protector/connector for connection to theantenna system. Note that some installations have a ten-MHz reference signal cabled fromthe transmitter controller to connector J8 on the back of the DSP exciter.3.3.2 Site Audio/Modulation-Signal FlowModulation information arrives at the site either through a link receiver or by wireline. Thedigital signal is first routed through the transmitter controller, which checks for andresponds to appropriate embedded commands. Paging information is supplied to theexciter. The exciter modulates this signal using digital signal processing, then up-convertsthis modulated signal to final output frequency. This modulated RF from the exciter issupplied to the PA, which amplifies the signal to the RF output level. This modulated,amplified RF from the PA is supplied to an antenna network for transmission.
GL-T8200 1- to 25-Watt 900-MHz Transmitter System Glenayre Document Number: 9110.01305+DESCRIPTION Rev. A: 03/24/99Page: 3-6 Copyright © 1999 Glenayre Print Date: 05/10/993.3.3 Simplified Block-Diagram DescriptionRefer to Figure 3-2. The interface between the transmitter and the transmitter controller isthe I20 interface. Refer to the exciter manual for details.Figure 3-2 Transmitter Simplified Block Diagram
Glenayre Document Number: 9110.01305 GL-T8200 1- to 25-Watt 900-MHz Transmitter System Rev. A: 03/24/99 +DESCRIPTION8200sys3Print Date: 05/10/99 Copyright © 1999 Glenayre Page: 3-73.3.4 Site Control-Signal FlowTransmitter paging-site control is done two ways:• remotely (normally operation), and• locally.In either case, the paging transmitter is keyed when the transmitter controller commands it,via the DSP exciter, to key.Control functions are shared by the transmitter controller and the DSP exciter, whichcontrols the power amplifier. The DSP exciter also controls the power amplifier locally byresponding to commands from the VDT.Control signals enter and exit the paging site via the transmitter controller, which hasoverall control of the paging site. The transmitter controller is part of the larger pagingcontrol system even though it is racked with paging-site equipment. The transmittercontroller has control functions which include these:• transmitter alarm-gathering• transmitter-alarm dispatching• simulcast-parameter implementation• remote control.Remote control of the paging site is done through commands being sent to the transmittercontroller from the external paging control system.Control commands originating from a remote site are supplied to the exciter through thecontrolling device. Control and setup commands may be applied to the exciter locallythrough the VDT. A microprocessor within the exciter interprets each command andresponds by performing the appropriate function.3.3.5 Status-Signal FlowThe exciter monitors transmitter status signal in the form of fault logic and voltage samples.The microprocessor within the exciter reports transmitter status to the controlling device,VDT, and the exciter front panel. If a transmitter malfunction occurs, a reduced operatingcondition is entered, depending on the seriousness of the fault.
GL-T8200 1- to 25-Watt 900-MHz Transmitter System Glenayre Document Number: 9110.01305+DESCRIPTION Rev. A: 03/24/99Page: 3-8 Copyright © 1999 Glenayre Print Date: 05/10/99
Glenayre Document Number: 9110.01305 GL-T8200 1- to 25-Watt 900-MHz Transmitter System Rev. A: 03/24/99 INSTALLATION AND SETUP8200sys4Print Date: 05/10/99 Copyright © 1999 Glenayre Page: 4-14 INSTALLATION AND SETUP4.1 Site Checks4.1.1 Transmitter EnvironmentThe transmitter environment should be clean and well ventilated. Additionally, the temper-ature inside the transmitter room should be maintained within the equipment specifications.Refer to Table 4-2. The lower temperature limit is generally less of a problem due to theheat produced by the equipment during operation, but it can become a problem in the coldermonths of the year. The upper temperature limit is often a problem, especially in thesummer months. In accordance with local building codes and the permission of the buildingowners, the advice of local heating and air conditioning professionals is recommendedprior to installation.4.1.2 InspectionInspect the equipment to be certain that the shipment is complete. Compare items receivedto the packing list. The packing list shows two portions of the equipment and optionsspecified on the sales order: the portion presently being shipped, and the portion still onback order. It does not report the portion of the sales order that has already been shipped.Report shipping loss or damage to carrier within 15 days of receipt. Remove any packingmaterial from the rack and check each assembly. Pay particular attention to the poweramplifier modules and power supply; check them closely and remove any foreign materialin the chassis or air cooling passages. Be certain to disconnect primary power from thepower supply before removing any equipment covers4.1.3 Primary Power RequirementThe primary power source must be capable of delivering adequate power to the equipment.Refer to the power supply manual. Electrical connections made to this equipment must bemade in accordance with local electrical codes.• A switching power supply which operates in 115-Vac range and 230-Vac range. Refer topower supply manual for specifications.• Dc-to-dc converters may be used in some configurations.The wire used to deliver the primary power must be large enough to safely carry therequired current. If the run of wire is too long, a larger size wire must be used to preventexcessive voltage drop.
GL-T8200 1- to 25-Watt 900-MHz Transmitter System Glenayre Document Number: 9110.01305INSTALLATION AND SETUP Rev. A: 03/24/99Page: 4-2 Copyright © 1999 Glenayre Print Date: 05/10/994.2 InstallationRefer to Figure 4-1, for general information.4.2.1 Tools and Equipment RequiredRefer to Table 4-1. Equipment listed by brand name may be substituted with equivalent.For installation, only common hand tools are necessary if at all, since installation is usuallycompleted at the factory. 4.2.2 Rack PositioningCooling and cabling restraints require that equipment pieces be racked so that there isadequate ventilation for exhaust air. The front and back of the rack should have at least teninches of free space. The cabinet should be placed as close as possible to the transmittingantenna, and to the primary power source as a secondary consideration. To gain reasonableaccess to the back, 30 inches (75 cm) of free space should be allowed..CautionNever place the rack where moisture, steam,condensation, or standing water, can come incontact with it. The host room may need to be airconditioned or additionally ventilated to removeexcess heat generated by this equipment.4.2.3 Rack GroundingThe rack cabinet must be connected to a reliable earth ground. Connect the earth groundpoint to the ground stud provided in the bottom of the cabinet; use four gauge or largercopper conductor.Table 4-1 Required Tools and Equipmentnut driver - 5/16 in (7.9 mm)screw driver - #2 flat blade and # 3 flat bladescrew driver - #2 Phillips and #3 PhillipsBird 4421 RF power meterBird 8327 dummy loadbarrel connector - type-Ncable - 1 M long (max) with type-N endsFluke 77 DVM
Glenayre Document Number: 9110.01305 GL-T8200 1- to 25-Watt 900-MHz Transmitter System Rev. A: 03/24/99 INSTALLATION AND SETUP8200sys4Print Date: 05/10/99 Copyright © 1999 Glenayre Page: 4-34.2.4 Positioning within the RackWhen it is used in a normal, one-transmitter-per-cabinet rackup, the transmitter should beplaced just above the power supply.The transmitter is normally shipped already installed in a cabinet. To remove or reinstallthe transmitter, refer to Section 9.DANGERRotating fan blades are a hazard to maintenancepersonnel who access equipment from the rear.4.2.5 Equipment Cabling4.2.5.1 Ac and Dc ConnectionsRefer to Figure 4-1. Be certain that the site-environmental requirement for available acpower has been met. A grommeted hole in the cabinet is recommended for ac power inputcable. The ac input is fused at the back of the power supply. Generally, all ac connectionsinternal to the rack are made at the factory and should not need to be modified. The high-current positive supply and negative return to the PA are between power-supply DCOUTPUT and the large jacks in the middle of the PA (as viewed from the rear). The PAboard has fusing which connects to the transmitter controller, DSP exciter, receiver, or anyother equipment.4.2.5.2 Dc-Only SitesThis option is available. Some installations do not use ac input power. If the transmitter isnot racked and wired at the factory, be sure to connect as shown in the documentationsupplied with the retrofit option.4.2.5.3 Signal ConnectionsRefer to Figure 4-2. Generally, all control and signal connections internal to the rack aremade at the factory and should not need to be modified. antenna-receiver If a receiver is used, refer to the receiver manual for details. receiver-transmitter controller A cable runs from the rear of the receiver to the transmitter controller. Refer to the receivermanual and the transmitter controller manual for details. Alternately, a telephone line isconnected to the transmitter controller. Some installations may have additional connectionsto the transmitter controller. transmitter-controller-exciter A multiconductor cable runs between the transmitter controller EXCITER connector toexciter J4. If the transmitter’s 10-MHz output is used, it goes from transmitter controller 10MHz OUTPUT to exciter J8.
GL-T8200 1- to 25-Watt 900-MHz Transmitter System Glenayre Document Number: 9110.01305INSTALLATION AND SETUP Rev. A: 03/24/99Page: 4-4 Copyright © 1999 Glenayre Print Date: 05/10/99 exciter-PA A multiconductor cable runs from exciter J6 to PA J6. The RF signal is via a coaxial jumperfrom exciter J3 to PA RF input (left side of PA). PA-transmitting antenna PA RF output connector (point at which rated power is measured) goes to a type-Nconnector on the cabinet.4.3 SetupRefer to the VDT manual and VDT screens for most setup information.4.4 Ultimate DispositionCautionThis equipment may contain hazardous materials.Check with the local EPA or other environmentalauthority before disposing of this equipment.
Glenayre Document Number: 9110.01305 GL-T8200 1- to 25-Watt 900-MHz Transmitter System Rev. A: 03/24/99 INSTALLATION AND SETUP8200sys4Print Date: 05/10/99 Copyright © 1999 Glenayre Page: 4-5Figure 4-1 Rear View Showing Dc and Signal Connections
GL-T8200 1- to 25-Watt 900-MHz Transmitter System Glenayre Document Number: 9110.01305INSTALLATION AND SETUP Rev. A: 03/24/99Page: 4-6 Copyright © 1999 Glenayre Print Date: 05/10/99
Glenayre Document Number: 9110.01305 GL-T8200 1- to 25-Watt 900-MHz Transmitter System Rev. A: 03/24/99 OPERATION8200sys5Print Date: 04/14/99 Copyright © 1999 Glenayre Page: 5-15OPERATION5.1 Controls and IndicatorsThese assemblies within the transmitter have controls and indicators:• PA/compartment - see PA manual• exciter - see exciter manual• power supply-see Paragraph 5.2.1.5.2 OperationThe transmitter normally operates within the paging system in an unattended manner. Acontrol site remotely commands the transmitter controller, which, in turn, controls theexciter and PA. Local control is not intended for operation, but for setup, checkout, or main-tenance. Refer to the appropriate section:•Section 7, MAINTENANCE•Section 8, CHECKOUT AND TROUBLESHOOTING•Section 9, REMOVAL AND REINSTALLATION.Also refer to the VDT manual.5.2.1 Turn Transmitter On and OffThe transmitter turns off and on whenever the power supply is energized. When the PA ison, it remains in a standby condition until keyed.5.2.2 Turn Fans On and OffThe fan does not contain an on/off switch, but turns on and off whenever the primary powerequipment is turned on and off. The fan runs continuously whenever primary power is on.DANGERRotating fan blades are a hazard to maintenancepersonnel who access equipment from the rear.5.2.3 Key and Unkey PAThe PA does not contain a key switch, but is keyed and unkeyed by the exciter. The excitermust be keyed and unkeyed remotely through transmitter controller or locally through avideo display terminal (VDT). Refer to the controller manual for remote key and unkeyinstructions or to the VDT manual for local key and unkey instructions.
GL-T8200 1- to 25-Watt 900-MHz Transmitter System Glenayre Document Number: 9110.01305OPERATION Rev. A: 03/24/99Page: 5-2 Copyright © 1999 Glenayre Print Date: 04/14/99
Glenayre Document Number: 9110.01305 GL-T8200 1- to 25-Watt 900-MHz Transmitter System Rev. A: 03/24/99 THEORY OF OPERATION8200sys6Print Date: 03/26/99 Copyright © 1999 Glenayre Page: 6-16 THEORY OF OPERATION6.1 Cabinet Power DistributionRefer to Figure 4-2.6.1.1 Ac Power InputAc power is routed from the ac mains to the power supply, which produces the dc voltagefor the cabinet. Refer to the power supply manual. The input voltage and frequency shouldbe within the specifications of the power supply. All electrical wiring should be done incompliance with local electrical codes.6.1.2 Dc Power DistributionHigh current for the power amplifier is routed from the power supply connectors directlyto the main dc input on the power amplifier. Operating power for all assemblies is routedto a PA board which is connected to all assemblies in the cabinet which require 28 volts.The PA board has several conductors which route power from the power supply to PAcircuits and other equipment within the rack cabinet.6.2 Cabinet Signal DistributionRefer to Figure 4-2.6.2.1 Control, Data, and Modulation PathsThe transmitter controller is usually a GL-C2000. It receives information at its link inputconnector from a receiver, normally mounted within the cabinet, or else receive informa-tion from dedicated telephone lines. A connector from the DIGITAL LINK OUTPUT isrouted to the exciter, which provides control and modulated RF drive to the PA. RF driveis delivered via a separate coaxial cable.A reference signal from the exciter determines the nominal output power. Depending on theexciter interface, the level may be remotely adjustable. The REF SAMPLE signal is fed tothe exciter, which uses it to control the power via a reference voltage. The reference voltageserves as an AGC input, which adjusts the gain of the power amplifier.6.2.2 Alarm ReportingAny alarms generated within the PA are summed to the PA-fault output, which is relayedto the exciter and transmitter controller for system response and alarm reporting.
GL-T8200 1- to 25-Watt 900-MHz Transmitter System Glenayre Document Number: 9110.01305THEORY OF OPERATION Rev. A: 03/24/99Page: 6-2 Copyright © 1999 Glenayre Print Date: 03/26/99
Glenayre Document Number: 9110.01305 GL-T8200 1- to 25-Watt 900-MHz Transmitter System Rev. A: 03/24/99 MAINTENANCE8200sys7Print Date: 03/24/99 Copyright © 1999 Glenayre Page: 7-17 MAINTENANCE7.1 IntroductionMaintenance procedures in this section are listed below.• PA-current check• dc ripple check7.2 Maintenance Procedures7.2.1 PA Current CheckOccasionally, the power amplifier device currents should be compared to the levels listedon the data sheet that accompanied the transmitter. Be sure that the operating RF output isthe same as listed on the data sheet. Also refer to the PA manual.1. Put transmitter in local mode.2. Key transmitter.3. Monitor power amplifier currents on VDT.4. Make comparison between data sheet and monitor.Monitored currents should not vary more than ten percent from data sheet levels. Anexception is when original components or modules have been replaced or modified; in thiscase, a new benchmark should be noted for future reference.7.2.2 Dc Ripple CheckThis procedure assumes that an ac power supply is part of the configuration. Occasionallythe ac supply should be checked for excessive ripple. The supply should be under normaloperating load for this procedure.1. Put transmitter in local mode.2. Key transmitter.3. Connect oscilloscope between ground and supply output.4. Set oscilloscope to read ripple.The observed ripple level should be less than the specification given in the power supplymanual.
GL-T8200 1- to 25-Watt 900-MHz Transmitter System Glenayre Document Number: 9110.01305MAINTENANCE Rev. A: 03/24/99Page: 7-2 Copyright © 1999 Glenayre Print Date: 03/24/99
Glenayre Document Number: 9110.01305 GL-T8200 1- to 25-Watt 900-MHz Transmitter System Rev. A: 03/24/99 CHECKOUT AND TROUBLESHOOTING8200sys8Print Date: 03/24/99 Copyright © 1999 Glenayre Page: 8-18 CHECKOUT AND TROUBLESHOOTINGCheckout procedures can be performed at any time to verify that the transmitter and relatedpaging site equipment is functioning properly. After the checkout procedures are success-fully completed, the site can be returned to normal service. Refer to the VDT user manualand the VDT menus for more details on checkout procedures.8.1 Preparation for Checkout Procedures8.1.1 Dc-Voltage VerificationOnce powered, verify that equipment is powered and refer to list below.1. On power supply, PWR ON indicator is on.2. On G/L exciter front panel, DC POWER indicator is on.3. On the transmitter controller, the POWER indicator is on.4. On receiver (if used), the POWER indicator is on.8.1.2 VDT Power-up VerificationVerify that the VDT is powered and correctly attached to the exciter; continue with thechecklist below.• The VDT should have a cursor displayed and blinking; or,• the VDT should have an instructional prompt displayed; or,• the VDT should have an auto-loaded program running.8.1.3 Cooling-Fan CheckOnce the transmitter is powered, verify that the fan is operating; it should operate wheneverthe transmitter is powered.8.2 Operational VerificationThe following procedures use the VDT and its various menus to control the transmitterlocally. Be certain to disable remote operation of the transmitter before performing localtests in order to avoid unintentional keying of the equipment.
GL-T8200 1- to 25-Watt 900-MHz Transmitter System Glenayre Document Number: 9110.01305CHECKOUT AND TROUBLESHOOTING Rev. A: 03/24/99Page: 8-2 Copyright © 1999 Glenayre Print Date: 03/24/998.2.1 RF Power and AntennaCheck the transmitter’s RF output and the antenna’s reflected power with the RF-outputprocedure.RF Output and Antenna Checks1. Using coax jumper no longer than 1 meter, attach calibrated thruline wattmeter be-tween antenna network and cabinet RF output connector.2. Key transmitter and measure output power; it should be within ten percent of expect-ed output. Note that the expected output must take into account the attenuation of the coaxial cable and connectors after the isolator output. Expected attenuation is typical-ly 0.5 to 2 dB. The transmitter power specification is for output from the PA output connector, not the transmitter cabinet. Adjust power output, if necessary.3. If RF output is low or none, check exciter drive with thruline wattmeter and VDT; nominal output is 20 mW.4. Measure reflected power on meter (Also compare with VDT indication.) and calcu-late VSWR. VSWR should be less that 1.2.5. Using VDT, read and record PA currents.6. Unkey transmitter.7. Remove dummy load.8. Key transmitter. Transmitter shuts down immediately, indicating that transmitter has detected excessive VSWR and has cut off RF output. A high-VSWR fault is recorded on VDT.9. Unkey transmitter.10. Reconfigure transmitter system normally. Verify that the PA currents correspond to full-power values obtained in step 5.This procedure is complete.8.2.2 PagingPager function should be checked after the RF output has been verified. Determine that thetransmitter system sets off local pagers. Check pagers in all formats used by the system.Use the normal pager-activation procedure to attempt to set off pagers. Check that pagersare activated as expected and are not falsely activated. Note that some pagers may beactivated in a delayed manner if the system is busy or if the paging system batches pagingtypes so that pages of the same format go out together, rather than being dispatched in theorder in which the control site receives them.Once pager activation has been verified, the station may be placed into service.8.3 Field Replacement of AssembliesSection 9 contains replacement procedures for rack assemblies which fail checkout. Referto the individual equipment manuals for more detailed replacement procedures.
Glenayre Document Number: 9110.01305 GL-T8200 1- to 25-Watt 900-MHz Transmitter System Rev. A: 03/24/99 REMOVAL AND REINSTALLATION8200sys9Print Date: 03/24/99 Copyright © 1999 Glenayre Page: 9-19 REMOVAL AND REINSTALLATIONThe following paragraphs discuss removing and reinstalling the various assemblies whichmake up the transmitter. Refer to the individual equipment manuals for information onsubassemblies which may be replaced in the field.DANGERRemove all input power to the cabinet beforeperforming a removal or reinstallation procedure.NoteThe user may choose to remove the PA and exciter before removing thetransmitter chassis in order to lighten the chassis for handling.9.1 Power SupplyRefer to the power supply manual for removal and reinstallation of the power supply. 9.2 Exciter Removal and ReinstallationAlso refer to the exciter manual. The local reference oscillator, if used, can be adjustedwhile the unit is mounted in the rack.Removal1. From rear of transmitter chassis, label and remove signal connectors on rear of excit-er. Note that some DB-style connectors require loosening screws which hole the mat-ing receptacles in contact with one another.2. Remove red (+) and black (-) wire from the exciter by loosening retaining screws. Tape exposed end of red wire so that it does not inadvertently come in contact with chassis.3. Unfasten BNC RF output plug on right side of chassis.4. Label and remove any other connections to exciter.5. On chassis front, turn screw fasteners ccw to loosen; pull exciter chassis forward and out of transmitter chassis.This procedure is complete.
GL-T8200 1- to 25-Watt 900-MHz Transmitter System Glenayre Document Number: 9110.01305REMOVAL AND REINSTALLATION Rev. A: 03/24/99Page: 9-2 Copyright © 1999 Glenayre Print Date: 03/24/99ReinstallationWhen replacing the exciter, be certain that all variable subassemblies in the replacementexciter are correct for system requirements. Subassemblies and settings which must bematched include those included in the list below.• VCO/RF amplifier (must be for the correct frequency band)• firmware chips (must be of the correct revision and type)• controller interface (must be of the proper type and revision for interfacing with the trans-mitter controller)• power level (approximately 10-20 mW).Refer to the exciter manual for additional information.1. Slide replacement exciter into top location of transmitter chassis.2. Refasten front-panel screw fasteners.3. Reattach and resecure connectors removed during removal process.This procedure is complete. Refer to the exciter manual and VDT manual to check out andrealign replacement exciter.9.3 PA Removal and ReinstallationRefer to the PA manual.

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