Glenayre Electronics GL T8100 User Manual

GL-T8100 Rev. A: 08/04/98

GL-T8100 System Manual

Premilinary

PN 9110.01196

Revision A

any means -- graphic, electronic, or mechanical, including photocopying, recording, taping, or information-retrieval system -- without written permission of Glenayre.

GL-T8100 Glenayre Document Number: 9110.01196 Document Change Record Rev. A: 08/04/98

Document Change Record

Issue: 1, Revision A Date: 08/04/98 Changes: None, Original

g1196s10.fm

Glenayre Document Number: 9110.01196 GL-T8100 Rev. A: 08/04/98 GENERAL

10 GENERAL

Information expressed in this section is intended to keep the instruciton manual current with respect to recent product updates. The GL-T8100 is frequency-selectable by specifying the appropriate internal frequency-determining hardware and software. Refer to Table 10-2 for the correct part number.

10.1 Applicable Documents

This manual is incomplete without the document shown in Table 10-1, Applicable Documents.

Table 10-1 Applicable Documents

Document Part number Description

DSP Exciter user manual 9110.01021 This manual describes the features of the

DSP exciter.

GL2728 Power Supply 9110.00622 This manual describes the features of the

10.2 Additional Specifications

Table 10-2, Part Numbers of VCO/RF Amplifier Boards, identifies transmitter model additions to the existing Table 3-1 in the DSP exciter user manual, 9110.01021.

Transmitter model

GL-T8100 924 - 936 263-0082-053

10.3 Additional Hardware

An external low-pass filter, Figure 10-1, Low-Pass Filter, is part of the GL-T8100 and is required to meet emission standards.

GL2728 power supply

Table 10-2 Part Numbers of VCO/RF Amplifier Boards

VCO/RF amplifier board frequency band (MHz)

VCO board assembly part number

GL-T8100 Glenayre Document Number: 9110.01196 GENERAL Rev. A: 08/04/98

Figure 10-1 Low-Pass Filter

g1196s10.fm

Glenayre Document Number: 9110.01196 GL-T8100 Rev. A: 08/04/98 GENERAL

10.4 Simplified Block-Diagram Description

Refer to Figure 10-2, Simplified Block Diagram, in the following discussion. Inputs from the transmitter controller usually are one or two data bits, two channel-select bits, and keying input. Outputs to the controller are keying output indicator, various fault outputs, forward-power sample, and reflected-power sample.

Figure 10-2 Simplified Block Diagram

GL-T8100 Glenayre Document Number: 9110.01196 GENERAL Rev. A: 08/04/98

DSP Exciter Rev. B: 06/11/98

DSP Exciter (EC) User Manual

RELEASED

PN 9110.01021

Revision B

any means -- graphic, electronic, or mechanical, including photocopying, recording, taping, or information-retrieval system -- without written permission of Glenayre.

DSP Exciter Glenayre Document Number: 9110.01021 Document Change Record Rev. B: 06/11/98

Document Change Record

Issue: 1, Revision A Date: 11/24/97 Changes: None, Original

Issue: 1, Revision B Date: 06/11/98 Changes: made 88-us changes to text and figures, created intdex

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 Table of Contents

Table of Contents

1 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

1.1 Manual Scope . . . . . . . . . . . . . . . . . . . . . . . . 1-1

1.2 Applicable Documents . . . . . . . . . . . . . . . . . . . . 1-1

1.3 Glenayre Locations . . . . . . . . . . . . . . . . . . . . . . 1-1

1.3.1 Product Warranty Information . . . . . . . . . . . . . . . . . . 1-2

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2 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

3 DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

4 INSTALLATION AND SETUP . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

1.3.2 Service Warranty Information . . . . . . . . . . . . . . . . . . 1-2

3.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

3.2 Physical Description . . . . . . . . . . . . . . . . . . . . . 3-1

3.3 Simplified Block-Diagram Description . . . . . . . . . . . . . . 3-1

4.1 Precautions and Hazards . . . . . . . . . . . . . . . . . . . . 4-1

4.2 Test Equipment and Tools Required . . . . . . . . . . . . . . . 4-1

4.3 Component and Adjustment Locations . . . . . . . . . . . . . . 4-1

4.4 Installation . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4.4.1 Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4.4.2 Power Requirement . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4.4.3 Input/Output Connections . . . . . . . . . . . . . . . . . . . . 4-2

4.4.4 Signal Functions . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

4.4.5 Switches and Jumpers . . . . . . . . . . . . . . . . . . . . . . 4-3

4.5 Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

4.6 Ultimate Disposition . . . . . . . . . . . . . . . . . . . . . 4-4

4.7 Grounding . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

5 OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

5.1 Front-Panel Controls and Indicators . . . . . . . . . . . . . . . 5-1

5.2 Operating Instructions . . . . . . . . . . . . . . . . . . . . . 5-1

6 THEORY OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

6.1 Exciter/PA Control . . . . . . . . . . . . . . . . . . . . . . 6-1

6.1.1 Reference Source . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

6.1.2 Main Circuit Frequencies . . . . . . . . . . . . . . . . . . . . . 6-1

6.1.3 Controller Interface Functions . . . . . . . . . . . . . . . . . . 6-1

DSP Exciter Glenayre Document Number: 9110.01021 Table of Conten t s Rev. B: 06/11/98

6.2 Interface to Controller . . . . . . . . . . . . . . . . . . . . 6-1

6.3 DSP Modulator . . . . . . . . . . . . . . . . . . . . . . . 6-3

6.3.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

6.3.2 DSP Modulator Signal Flow . . . . . . . . . . . . . . . . . . . 6-3

6.3.2.1 Digital Signal Modulator . . . . . . . . . . . . . . . 6-3

6.3.2.2 Digital Quadrature Modulator . . . . . . . . . . . . 6-4

6.3.2.3 Digital-to-Analog Converter . . . . . . . . . . . . . 6-4

6.3.2.4 Read-Only Memory . . . . . . . . . . . . . . . . . 6-4

6.4 IF Stage . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4

6.4.1 Filter-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4

6.4.2 Mixer-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

6.4.3 Filter-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

6.4.4 VCO-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

6.4.5 Synthesizer-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

6.5 MCU . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

6.5.1 Microcontroller Unit (MCU) . . . . . . . . . . . . . . . . . . . 6-7

6.5.2 Digital-to-Analog (D/A) Converter . . . . . . . . . . . . . . . 6-7

6.5.3 8/16-Bit Converter . . . . . . . . . . . . . . . . . . . . . . . . 6-7

6.5.4 Read-Only Memory . . . . . . . . . . . . . . . . . . . . . . . 6-8

6.5.5 VSWR-Fault Detector . . . . . . . . . . . . . . . . . . . . . . 6-8

6.5.6 Alarm Data-to-Logic Conversion . . . . . . . . . . . . . . . . 6-8

6.5.7 Alarm Data-to-Logic Conversion . . . . . . . . . . . . . . . . 6-8

6.6 RF Assemblies . . . . . . . . . . . . . . . . . . . . . . 6-14

6.6.1 RF Stage Location . . . . . . . . . . . . . . . . . . . . . . . 6-14

6.6.2 RF Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . 6-14

6.6.2.1 RF Stage Description . . . . . . . . . . . . . . . . 6-14

6.6.2.2 RF Stage Bands . . . . . . . . . . . . . . . . . . . 6-14

6.6.2.3 RF Stage Signal Flow . . . . . . . . . . . . . . . . 6-14

6.6.2.3.1 Mixer-2 . . . . . . . . . . . . . . . . . . . . . . . . 6-14

6.6.2.3.2 Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-15

6.6.2.3.3 Amplifier . . . . . . . . . . . . . . . . . . . . . . . 6-15

6.6.2.3.4 VCO-2 . . . . . . . . . . . . . . . . . . . . . . . . . 6-15

6.6.2.3.5 Synthesizer-2 . . . . . . . . . . . . . . . . . . . . 6-15

6.7 Voltage Regulator Circuit . . . . . . . . . . . . . . . . . . 6-15

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 Table of Contents

7 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

7.1 Location of Maintenance Procedures . . . . . . . . . . . . . . . 7-1

7.2 Test Equipment Required . . . . . . . . . . . . . . . . . . . 7-1

7.3 VCO-2 Adjustment Procedure . . . . . . . . . . . . . . . . . 7-1

7.3.1 VCO-2 Multichannel Adjustment Procedure . . . . . . . . . . 7-1

7.3.2 VCO-2 Single-Channel Adjustment Procedure . . . . . . . . . 7-1

7.4 Over-The-Link Downloading . . . . . . . . . . . . . . . . . . 7-2

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7.5 On-The-Fly Channel/Mode Changing . . . . . . . . . . . . . . 7-2

7.5.1 Programming Example . . . . . . . . . . . . . . . . . . . . . . 7-3

7.5.1.1 DSP Exciter (2.1) / GL-C2000 (2.3) . . . . . . . . . 7-4

7.5.1.2 DSP Exciter (3.0) / GL-C2000 (3.0) / GL3000 (6.0) . 7-4

7.6 16-Channel Operation . . . . . . . . . . . . . . . . . . . . . 7-4

7.7 On-The-Fly Interface . . . . . . . . . . . . . . . . . . . . . 7-5

7.8 Checkout . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6

7.9 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . 7-6

8 REMOVAL AND REINSTALLATION . . . . . . . . . . . . . . . . . . . . 8-1

8.1 Exciter/PA Control Chassis . . . . . . . . . . . . . . . . . . . 8-1

8.1.1 Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . 8-1

8.1.2 Reinstallation Procedure . . . . . . . . . . . . . . . . . . . . . 8-1

8.2 Exciter Cover . . . . . . . . . . . . . . . . . . . . . . . . 8-2

8.2.1 Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . 8-2

8.2.2 Reinstallation Procedure . . . . . . . . . . . . . . . . . . . . . 8-2

8.3 Exciter/Control Board . . . . . . . . . . . . . . . . . . . . . 8-5

8.3.1 Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . 8-5

8.3.2 Reinstallation Procedure . . . . . . . . . . . . . . . . . . . . . 8-5

8.4 Interface I/O Board . . . . . . . . . . . . . . . . . . . . . . 8-8

8.4.1 Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . 8-8

8.4.2 Reinstallation Procedure . . . . . . . . . . . . . . . . . . . . . 8-8

8.5 VCO/RF Amplifier Board . . . . . . . . . . . . . . . . . . . 8-9

8.5.1 Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . 8-9

8.5.2 Reinstallation Procedure . . . . . . . . . . . . . . . . . . . . . 8-9

DSP Exciter Glenayre Document Number: 9110.01021 Table of Conten t s Rev. B: 06/11/98

9 OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

9.1 Exciter/PA Control w/ QT-1000 Interface . . . . . . . . . . . . 9-1

9.1.1 Reference Source . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

9.1.2 Controller Interface Connector Functions (QT-1000) . . . . . . 9-1

9.1.3 Interface Conversion Functions (QT-1000) . . . . . . . . . . . 9-1

9.1.3.1 Analog-Mode A/D Conversion . . . . . . . . . . . 9-1

9.1.3.2 FSK-Data-Bit Strapping . . . . . . . . . . . . . . . 9-2

9.1.3.3 Channel-Select-Bit Strapping . . . . . . . . . . . . 9-2

9.1.3.4 Mode-Select-Bit Strapping . . . . . . . . . . . . . . 9-2

9.1.3.5 Power Sample D/A Conversion . . . . . . . . . . . 9-2

9.2 Exciter/PA Control with Standard Interface . . . . . . . . . . . . 9-5

9.2.1 Reference Source . . . . . . . . . . . . . . . . . . . . . . . . . 9-5

9.2.2 Controller Interface Connector Functions (Standard) . . . . . . 9-5

9.2.3 Interface Conversion Functions (Standard) . . . . . . . . . . . 9-5

9.2.3.1 Analog-Mode A/D Conversion . . . . . . . . . . . 9-5

9.2.3.2 FSK-Data-Bit Strapping . . . . . . . . . . . . . . . 9-6

9.2.3.3 Channel-Select-Bit Strapping . . . . . . . . . . . . 9-6

9.2.3.4 Mode-Select-Bit Strapping . . . . . . . . . . . . . . 9-6

9.2.3.5 Power Sample D/A Conversion . . . . . . . . . . . 9-6

9.3 Exciter/PA Control with I20 Interface . . . . . . . . . . . . . . 9-6

9.3.1 Reference Source . . . . . . . . . . . . . . . . . . . . . . . . . 9-6

9.3.2 Controller Interface Connector Functions . . . . . . . . . . . . 9-7

9.3.3 I20 Interface Conversion Functions . . . . . . . . . . . . . . . 9-8

9.3.3.1 FSK-Data-Bit Strapping . . . . . . . . . . . . . . . 9-8

9.3.3.2 Channel-Select-Bit Strapping . . . . . . . . . . . . 9-8

9.3.3.3 Mode-Select-Bit Strapping . . . . . . . . . . . . . . 9-9

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 List of Figures

List of Figures

Figure 3-1 DSP Exciter Rear View . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Figure 3-2 DSP Exciter Top View

with Internal Controls and Indicators . . . . . . . . . . . . . . . . . . 3-5

Figure 3-3 DSP Exciter Simplified Functional Diagram . . . . . . . . . . . . . . 3-6

Figure 4-1 DSP Exciter/PA Control Circuit Boards

Interconnection Diagram . . . . . . . . . . . . . . . . . . . . . . . . 4-5

Figure 5-1 Front-Panel Controls and Indicators . . . . . . . . . . . . . . . . . . . 5-2

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Figure 6-1 DSP Exciter RF Stage Functional Diagram . . . . . . . . . . . . . . . 6-2

Figure 6-2 DSP Exciter MCU Circuit Functional Diagram . . . . . . . . . . . . . 6-5

Figure 6-3 DSP Exciter-to-Controller Functional Diagram . . . . . . . . . . . . 6-10

Figure 6-4 DSP Exciter Detailed Functional Diagram . . . . . . . . . . . . . . 6-12

Figure 6-5 DSP Exciter IF-Stage Detailed

Functional Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 6-13

Figure 7-1 On-The-Fly GL-C2000 Control Lines to DSP Exciter . . . . . . . . . 7-5

Figure 8-1 DSP Exciter Chassis Removal

and Reinstallation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3

Figure 8-2 DSP Exciter Cover Removal

and Reinstallation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4

Figure 8-3 DSP Exciter Control Board Removal and Reinstallation . . . . . . . . 8-7

Figure 8-4 DSP Exciter External Interface I/O Board

Removal and Reinstallation . . . . . . . . . . . . . . . . . . . . . . 8-10

Figure 8-5 DSP Exciter Interface Board Removal and Reinstallation . . . . . . 8-11

DSP Exciter Glenayre Document Number: 9110.01021 List of Figures Rev. B: 06/11/98

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 List of Tables

List of Tables

Table 1-1 Applicable Documents . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Table 2-1 Exciter Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Table 3-1 Part Numbers of VCO/RF Amplifier Boards . . . . . . . . . . . . . . 3-2

Table 3-2 Part Numbers of Interface Boards . . . . . . . . . . . . . . . . . . . . 3-2

Table 3-3 Part Numbers of Interface I/O Boards . . . . . . . . . . . . . . . . . . 3-3

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Table 3-4 Assembly and Control Board Numbers . . . . . . . . . . . . . . . . . 3-3

Table 4-1 DSP Exciter I/O Connectors . . . . . . . . . . . . . . . . . . . . . . . 4-2

Table 4-2 VT100 Interface Connector J3 Pin Assignments . . . . . . . . . . . . 4-2

Table 4-3 Control Board Connector J6 Pin Assignments . . . . . . . . . . . . . 4-3

Table 4-4 Exciter Control Board Jumper Positions . . . . . . . . . . . . . . . . 4-3

Table 6-1 Exciter RF/Main Circuit Frequencies . . . . . . . . . . . . . . . . . . 6-1

Table 7-1 Deviation and Offset Programming . . . . . . . . . . . . . . . . . . . 7-3

Table 9-1 Interface Board Connector J4 (QT-1000) . . . . . . . . . . . . . . . . 9-3

Table 9-2 Receiver Connector J5 Pin Functions

QT-1000 with External I/O Board . . . . . . . . . . . . . . . . . . . . 9-4

Table 9-3 Remote Select Input vs. Channel (QT-1000) . . . . . . . . . . . . . . 9-4

Table 9-4 Remote Select Input vs. Mode (QT-1000) . . . . . . . . . . . . . . . 9-4

Table 9-5 Interface Board Connector J4 (Standard) . . . . . . . . . . . . . . . . 9-7

Table 9-6 Remote Select Input vs. Channel (standard) . . . . . . . . . . . . . . 9-7

Table 9-7 Remote Select Input vs. Mode (standard) . . . . . . . . . . . . . . . . 9-8

Table 9-8 Interface Board Connector J2 . . . . . . . . . . . . . . . . . . . . . . 9-9

Table 9-9 Interface Board Connector J1 . . . . . . . . . . . . . . . . . . . . . . 9-9

Table 9-10 Remote Select Input vs. Channel (I20) . . . . . . . . . . . . . . . . 9-10

Table 9-11 Remote Select Input vs. Mode (I20) . . . . . . . . . . . . . . . . . . 9-10

DSP Exciter Glenayre Document Number: 9110.01021 List of Tables Rev. B: 06/11/98

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 GENERAL

1 GENERAL

1.1 Manual Scope

This manual provides information for the Glenayre DSP exciter and contains information on exciter connection, setup, and maintenance. Discussions and specifications include the following:

d1021_s1

• exciter specifications

• relevant part numbers

• setup requirements

• operational theory

• maintenance issues

• QT-1000 interface option

• standard interface option

• I20 interface option.

1.2 Applicable Documents

This manual is incomplete without the document shown in Table 1-1, Applicable Documents.

Table 1-1 Applicable Documents

Document Part number Description

DSP VDT Menus 9110.00259 This manual describes the features of the

exciter user interface software.

1.3 Glenayre Locations

For an updated list of Glenayre locations, refer to www.glenayre.com/corporate/contacts/default.asp .

DSP Exciter Glenayre Document Number: 9110.01021 GENERAL Rev. B: 06/11/98

U.S.A. CANADA Glenayre Customer Service - RF Glenayre Customer Service - RF One Glenayre Way 1570 Kootenay Street Quincy, Illinois 62301 USA Vancouver, BC V5K 5B8 Canada Phone: (217) 223-3211 Phone: (604) 293-1611 Fax: (217) 223-3284 Fax: (604) 293-4301

UNITED KINGDOM SINGAPORE Glenayre Electronics (UK) Ltd. Glenayre Electronics Singapore Pte. Ltd. Unit 22 Challenge House Block 5012 Ang Mo Kio Avenue 5 Sherwood Drive, Bletchley TechPlace II Unit 0503 Milton Keynes, MK3 6JD UK Singapore 2056 Phone: 44 1 908 644 642 Phone: (65) 481-1828 Fax: 44 1 908 644 643 Fax: (65) 481-2838

1.3.1 Product Warranty Information

Glenayre warrants to the original purchaser that Glenayre products are free fro m defects in material or workmanship for a period of two years from the original invoice date, subject to the provisions herein. Glenayre will repair or replace at its option, FOB our factory, free of charge within one year from the date of shipment, any component, assembly or 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 unauthorized modifications, force majeure, lightning, physical, environmental, or electrical damage including use with incompatible equipment are specifically excluded from this warranty. 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 those items manufactured by Glenayre. Equipment supplied by, but not manufactured by Glenayre, is subject only to any warranty offered by the manufacturer of said equipment.

1.3.2 Service Warranty Information

Return of a defective item must be authorized by Glenayre prior to shipment. A Return Authorization number can be obtained fro m Glenayre Customer Service. When requesting a Return Authorization number , give the serial numb er of the unit. A description of the faul t should accompany the unit on its return and the RA number must be shown on labels attached 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. If express shipping is required, the unit will be shipped collect.

Any repair service performed by Glenayre under this limited warranty is warranted to be free from def ects in ma terial or workman ship for ni nety da ys from the date of rep air. All other terms of this limited warranty apply to the service warranty.

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 SPECIFICATIONS

2 SPECIFICATIONS

Refer to Table 2-1, which lists the DSP exciter specifications.

Where possible, EIA or I-EIS A measuring methods were used in determining specifications. Note that some specifications are not addressed by either set of standards or the prescribed methods were impractical.

d1021_s2

Characteristic Condition Specification

Adjacent-channel noise 20-kHz channel spacing, analog mode,

Spurious output Per ETS 300 11 3, 8.6

RF output power Keyed 250 mW nominal Carrier frequency stability Steady state, -30° to

Table 2-1 Exciter Specifications

per ETS 300 086, 7.5 20-kHz channel spacing, in FSK mode,

per ETS 300 113, 8.5

12.5-kHz channel spacing, analog mode, per ETS 300 086, 7.5

12.5-kHz channel spacing, FSK mode, per ETS 300 113, 8.5

Per ETS 300 08 6, 7.6

+60° C

-70 dBc

-60 dBc

-90 dBc

10 MHz reference, int=0.005 ppm/yr,

ext=0.1 ppm/yr FSK frequency/modulation stability Relative to carrier frequency stability +/- 10 Hz max FSK adjustment accuracy +/- 10 Hz Offset resolution 1 Hz Number of channels Up to 16, depending on interface board

and controller Audio input -25 to +10 dBm

Impedance w ith transformer 600 ohm or 5k ohms balanc ed

Audio response Flat, 50 to 2800 Hz +/- 0.5 dB

preemphasized 6 dB per octave, 300 to 3000 Hz at 60% deviation

Audio distortion (1-kHz reference at 60% deviation)

25-kHz channel spacing Less than 1.5%

+/- 0.75 dB

DSP Exciter Glenayre Document Number: 9110.01021 SPECIFICATIONS Rev. B: 06/11/98

Table 2-1 Exciter Specifications (continued)

Characteristic Condition Specification

Audio response (tracking/units) Level 0.1 dB max

FM hum and noise (1-kHz reference at 60% deviati on)

25-kHz spacing flat, 15-kHz bandwidth -40 dB 25-kHz channel spacing preemphasized,

-55 dB

300 to 3000 Hz

AM hum and noise -34 dB Modulation types Analog, 2-level FSK, 4-level FSK avail-

able with some interfaces Channel spacing step size (kHz) Software-dependent 5, 6.25, 12.5, 20, 25 Emissions FCC 15K0F2D, 16K0F1D, 16K0F3E Power requirement 22-29 Vdc Less than 3 A Humidity Noncondensing 0 to 95% relative

External 10-MHz reference input Level 2 Vp-p min

Impedance 50 ohms Spurious ab ove 8 MHz -65 dBc max

Spurious below 8 MHz -50 dBc max Weight 4.8 lb (2.2 kg) Dimensions 8.75 in (22.25 cm) d x 19 in (48.25 cm) w

x 1.75 in (4.5 cm) h

Temperature range Operating -30° to +60° C

Storage -55° to +70° C Maximum elevation To 10,000 ft (3050 m)

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 DESCRIPTION

3 DESCRIPTION

3.1 General

The DSP exciter contains a microprocessor that allows remote or local control of the exciter and consolidates logic for varying degrees of PA control and monitoring through a video display terminal (VDT). Operating characteristics of the exciter are controlled by the selection of hardware options. It is frequency-selectable by specifying the appropriate

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3.2 Physical Description

internal frequency-determining hardware and software. It is also capable of commu nicating with several operating protocols through the proper selection of interface boards.

Refer to Table 3-1, Table 3-2, Table 3-3, and Table 3-4 for pertinent part numbers.

The exciter front panel contains eight LEDs, three adjus tments, and one connector ( also see section 5). The exciter chassis contains three circuit boards and space for an oscillator (not used with some controllers).

Refer to Figure 3-1, which shows the exciter rear panel. T he back panel contains three BNC connectors J3/J7/J8, DB-15 connector J6, and terminal board TB1 as standard items. Other back-panel connectors vary depending on which interface and I/O boards are installed. Figure 3-2 shows a top view of the exciter with its cover removed.

The I/O boards comprise the means to connect various controllers to the DSP exciter.

3.3 Simplified Block-Diagram Description

Refer to Figure 3-3 in the following discussion. Inputs from the transmitter controller usually are one or two data bits, two channel-select bits, and keying input. Outputs to the controller are keying output indicator, various fault outputs, forward-power sample, and reflected-power sample.

DSP Exciter Glenayre Document Number: 9110.01021 DESCRIPTION Rev. B: 06/11/98

Table 3-1 Part Numbers of VCO/RF Amplifier Boards

VCO/RF-

transmitter model

amplifier board frequency band (MHz)

VCO board assembly part No.

transmitter model

GL-T85/8601 929-941 263-0082-072 GL-T8311

936-948 263-0082-070 142-152 2100.00089

GL-T8411 GL-T8611

VCO/RFamplifier board frequency band (MHz)

VCO board assembly part No.

138-148 2100.00088

924-936 263-0082-069 147-157 2100.00090

GL-T85/8600 900-960 (wb) 263-0082-051/052/

157-167 2100.00092

053/054/055/062 948-960 263-0082-055 152-162 2100.00091 936-948 263-0082-054 167-175 2100.00094 929-941 263-0082-062 162-172 2000.00558

138-148 2100.00088

GL-T8341 GL-T8541 GL-T8641

924-936 263-0082-053 GL-T8311EC 445-470 2000.00189 142-152 2100.00089

GL-T8411EC GL-T8311E GL-T8411E

GL-T83/8531 320-330 263-0082-049 147-157 2100.00090 GL-T83/8521 275-285 263-0082-047 157-167 2100.00092

152-162 2100.00091 167-175 2100.00094 162-172 2000.00558

Table 3-2 Part Numbers of Interface Boards

DSP exciter-to-controller interface boards Interface board part No.

QT-1000 interface bd 265-0082-007 Standard interface bd 263-0082-036 I20 interface bd 265-0082-015

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 DESCRIPTION

Table 3-3 Part Numbers of Interface I/O Boards

Interface I/O board (control type) Interface I/O board part No.

QT-1000 Interface I/O bd 261-0082-003 Standard Interface I/O bd 261-0082-004 I20 Interface I/O bd 2000.00436

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Table 3-4 Assembly and Control Board Numbers

Exciter assembly No. Control board No.

0100.02020 (88 us) 2000.02090

DSP Exciter Glenayre Document Number: 9110.01021 DESCRIPTION Rev. B: 06/11/98

v0343.hgl

Figure 3-1 DSP Exciter Rear View

v0344.hgl

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 DESCRIPTION

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Figure 3-2 DSP Exciter Top View

with Internal Controls and Indicators

DSP Exciter Glenayre Document Number: 9110.01021 DESCRIPTION Rev. B: 06/11/98

v0251.hgl

Figure 3-3 DSP Exciter Simplified Functional Diagram

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 INSTALLATION AND SETUP

4 INSTALLATION AND SETUP

4.1 Precautions and Hazards

Caution

Pc boards within this assembly use static-sensitiv e

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4.2 Test Equipment and Tools Required

components. Follow IC-handling precautions.

Caution

The exciter contains internal memory which is used to characterize exciter operation. Upon exciter replacement, ensure that replacement exciter contains appropriate items in it s memory.

Common hand tools are required for disassembly and reassembly. An RFI-immune voltmeter may be required for voltage measurement. An in-line current meter may also be necessary for troubleshooting. A 50-ohm test load rated for 5 watts or more, an RF wattmeter rated and scaled appropriately, and RF coaxial cables are useful when verifying RF output.

4.3 Component and Adjustment Locations

Figure 3-2, DSP Exciter Top View with Internal Controls and Indicators, shows the location of assemblies, internal user-adjustable controls, and I/O locations. Note: most adjustments are performed via the front-panel VT100 interface.

4.4 Inst a lla ti on

4.4.1 Inspection

Inspect exciter to ensure air flow is not obstructed and cables and wires are securely fastened to their respective connectors.

4.4.2 Power Requirement

The DSP exciter, when used as a component of a transmitter, draws its power from system wiring. Current draw is less than three amperes at 22 to 29 volts. It is normally powered by the transmitter power supply but can be powered by an auxiliary supply.

DSP Exciter Glenayre Document Number: 9110.01021 INSTALLATION AND SETUP Rev. B: 06/11/98

4.4.3 Input/Output Connections

Figure 3-1 shows the locations of I/O connectors; Tab l e 4 -1 lists I/O connectors and describes their functions. Normally the exciter is delivered as part of an entire transmitter and has already been installed in a rack, with all connections already made, except for connections to equipment that was not installed in the rack before shipment . If I/O con nections are required, refer to the system-interconnect diagram and other instructions in the transmitter manual.

4.4.4 Signal Functions

See Table 4-1, which references other tables that describe pin-by-pin functions of multipin connectors, for details. Figure 4-1 shows interconnections among internal assemblies.

Table 4-1 DSP Exciter I/O Connectors

Additional

Stencil/Connector Description

Detail

VT100 INTERFACE: J3 VT100 interface to VDT (front) Table 4-2 RF OUT: J3 RF out, on frequency Figure 6-1 QT-1000 interface I/O J4 Interface to QT-1000 interface board Table 9-1 QT-1000 interface I/O J5 DB-9 connector, to receiver Table 9-2 Standard interface I/O J4 Interface to standard interface I/O board Table 9-1 I20 (C2000) interface I/O J2 Interface to C2000 interface I/O board Table 9-8 I20 (C2000) interface I/O J1 Interface to C2000 interface I/O board Table 9-9 PA CONTROL: J6 Connects to PA Table 4-3 ISOLATOR IN: J7 VSWR input from PA Figure 3-1 10 MHZ IN: J8 External reference input from interface Figure 3-1 +26 VDC: TB1 Exciter input power, +22-29 Vdc Figure 3-1

Table 4-2 VT100 Interface Connector J3 Pin Assignments

J3-X (front) Signal Description

2 TXD Transmit data line 3 RXD Receive data line 5 GND Ground 1,4,6,7,8,9 Not used

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 INSTALLATION AND SETUP

Table 4-3 Control Board Connector J6 Pin Assignments

J6-X Signal Description J6-X Signal Description

1 A/D1+ Multiplex analog input from PA

No. 1 multiplexer

2 A/D3+ Multiplex analog input from PA

No. 3 multiplexer

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3 AGC REF+ AGC reference voltage output to

9 A/D2+ Multiplex analog input from PA

No. 2 multiplexer

10 A/D4+ Multiplexed analog input from PA

No. 4 multiplexer

11 PA FAULT PA fault input, HI=fault

PA, 1-12 Vdc 4 PA GROUND No connection 12 PA GROUND No connection 5 PA GROUND No connection 13 INP UT

SELECT 1

One of four select outputs to PA multiplexers, LO=20 digit enabled for mux input decoder

6 INPUT

SELECT 2

One of four select outputs to PA

multiplexers, LO=2

14 INPUT

SELECT 3

One of four select outputs to PA multiplexers, LO=22 digit enabled for mux input decoder

7 KEY OUT Key output to PA 15 A UX LATCH

ENABLE

Latch-enable output to PA multiplexers, LO=mux input decoder reads the three select inputs. Not used with E and EC models.

8 REF SAMPLE Reflected-power sample input from PA

4.4.5 Switches and Jumpers

Figure 3-2 shows the locations of user-adjustable switches and jumpers. See Table 4-4 fo r a list of software-related jumper positions found on the exciter/control board. No switches are available to maintenance personnel.

Table 4-4 Exciter Control Board Jumper Positions

Jumper Pre version 2.10 software Version 2.10/later software

JW1 Set to A for external 10-MHz oscillator Set to A for external 10 MHz oscillator

Set to B for internal 10-MHz oscillator Set to B for internal 10 MHz oscillator

JW2 Set to A for password protection Set to A for password protection

Set to B to bypass password protection Set to B to bypass password protection

JW3 Set to A for external VSWR protection Always set to B (for internal and/or external

Set to B for internal VSWR protection

VSWR protection)

JW5 must be set t o A must be set to A

DSP Exciter Glenayre Document Number: 9110.01021 INSTALLATION AND SETUP Rev. B: 06/11/98

4.5 Setup

Note

When doing a setup for a wideband DSP exciter, the net channel change time must be set for 300 ms.

Refer to the DSP exciter VDT menus and u ser manu al fo r transmi tter-control setup information. All setup is done via the front-panel VT100 interface.

4.6 Ultimate Disposition

Caution

This equipment may contain hazardous materials. Check with the local EPA or other environmental authority before disposing of this equipment.

4.7 Grounding

As viewed from the back, the exciter chassis has a ground stud on th e right s i de of th e rear panel. It is shipped from the factory properly connected to ground with a green or greenwith-yellow-stripe wire. In newer cabinets, the chassis ground wire is connected to a grounding bus inside the cabinet. The ground bus is connected to a ground stud on the interface plate mounted to the top of the cabinet.

Caution

Improper, inadequate, or faulty grounding can cause erratic equipment operation. These conditions can also perpetuate equipment failure.

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 INSTALLATION AND SETUP

v0164.hgl

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Figure 4-1 DSP Exciter/PA Control Circuit Boards

Interconnection Diagram

DSP Exciter Glenayre Document Number: 9110.01021 INSTALLATION AND SETUP Rev. B: 06/11/98

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 OPERATION

5 OPERATION

5.1 Front-Panel Controls and Indicators

Refer to Figure 5 -1 which shows and describes front-panel indicators. The DSP exciter contains no front-panel user controls. Front-panel access to VCO adjustment and VSWRdetection threshold is for maintenance purposes only.

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5.2 Operating Instructions

The transmitter controller operates the exciter and transmitter in an unattended manner during normal system operation. The VT100 interface with a VDT enables the maintenance technician to perform maintenance and observe operational parameters. Refer to the DSP exciter VDT menus and user manual for detailed operating information.

DSP Exciter Glenayre Document Number: 9110.01021 OPERATION Rev. B: 06/11/98

mod.v0079.hgl

',*,7$/*5((1:+,/(02'8/$7(' $1$/2*

Figure 5-1 Front-Panel Controls and Indicators

96:57+5(6+2/'/(9(/$'-867

VSWR

THRESHOLD ADJ

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 THEORY OF OPERATION

6 THEORY OF OPERATION

6.1 Exciter/PA Control

Refer to Figure 6-1, which describes signal flow in the DSP exciter with the transm itter controller interface. The following major paragraphs describe the operation of the major items within the figure. Additional detailed figures are referenced, as required.

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6.1.1 Reference Source

The 10-MHz reference signal is provided by the transmitter controller via J8 on the exciter/ control board or by an optional internal reference oscillat or. All other inputs and outputs, except for RF output, are routed through the interface board.

6.1.2 Main Circuit Frequencies

The VCO/RF amplifier board installed determines the frequency for the RF output. Table 6-1 lists VCO/RF amplifier board frequencies and the corresponding exciter/output frequenci es .

Table 6-1 Exciter RF/Main Circuit Frequencies

Exciter Output Frequency (MHz)

900-960 100 90 89.9 810-870 445-470 100 90 89.9 535-560 275-330 100 90 89.9 365-420 130-180 100 90 89.9 220-270

First IF Frequency (kHz)

Second IF Frequency (MHz)

VCO-1 Frequency (MHz)

6.1.3 Controller Interface Functions

The exciter interfaces with the transmitter controller through the exciter interface I/O board. Alarm signals, consisting of transmitter alarm, fault, and status si gnals, are supplied directly to the transmitter controller. See Paragraph 9, OPTIONS, for details.

6.2 Interface to Controller

Refer to Section 9, OPTIONS, for details.

VCO-2 Frequency (MHz)

DSP Exciter Glenayre Document Number: 9110.01021 THEORY OF OPERATION Rev. B: 06/11/98

v0123.hgl

Figure 6-1 DSP Exciter RF Stage Functional Diagram

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 THEORY OF OPERATION

6.3 DSP Modulator

6.3.1 General

The DSP modulator circuit converts the data into the first IF signal, whi ch is fully modulated. The IF stage circuit converts the first IF signal into the s econd IF signal. The RF stage circuit converts the second IF signal into the RF output. Ten MHz is used as frequency reference by each conversion stage. The DSP modulator is the portion of exciter circuitry between the controller interface and the IF stage. The DSP modulator uses digital signal

d1021_s6

processing to modulate and up-convert the paging information into the first IF signal. The modulation type depends on the transmitter operating m ode. The IF stage is the portion of exciter circuitry between the DSP modulator and the RF stage. The IF stage uses heterodyne mixing to generate the optimum second IF signal frequency, which depends on the requirement of the VCO/RF amplifier board installed. The MCU control circuit is the command and control hub of the transmitter. The type of control software depends on the transmitter frequenc y and power o utput. The f ollowing text describes main exciter circuit ry that works for all software programs, modulation schemes, and IF signal frequencies. Figure 6-2 shows additional details.

6.3.2 DSP Modulator Signal Flow

Refer to Figure 6 -2 in the following discussio n. The inputs that provide the paging information to the DSP modulator circuit are digitized audio and FSK data, supplied by the controller interface circuit through connector pair P1/J1. Digitized audio arrives as serial data. FSK data arrives as parallel data. The DSP modulator circuit processes the digitized audio in the analog mode or the FSK data in the digital mode. The result of this processing

is the exciter’s first IF signal, which is applied to the IF stage circuit. To produce the first IF signal, the DSP modulator contains two DSPs (a signal modulator and a quadrature modulator), a digital-to-analog converter, and a read-only memory. The following text describes these four components and their signal flow.

6.3.2.1 Digital Signal Modulator

The signal modulator (SM) generates modulation that contains the paging information, which is supplied by digitized audio or FSK data. The digitized audio is input into a serial input port. An external edge detector is required to input the FSK data. The SM converts one of the data inputs into a modulated signal, which is mathematically represented within the SM as a vector signal, defined by its rectangular coordinates. These coordinates, commonly known as I and Q, are supplied to the digital quadrature modulator as 16-bit parallel data. The modulated signal output from the SM depends on the following signal characteristics:

• modulation scheme

• frequency response or rise time

• input logic or data inversion

• deviation level or bandwidth

• offset from carrier frequency

• analog gain and deviation limit.

DSP Exciter Glenayre Document Number: 9110.01021 THEORY OF OPERATION Rev. B: 06/11/98

The SM also performs all communications between the DSP modulator circuit and the MCU control circuit. These communications are through the SM 16-bit parallel data port. External input and output latches expand the capabilities of this port. Control inputs consist of commands such as reset, request status, set paging signal parameter, change mode, and boot program. Requested status outputs consist of current mode, deviation levels, input level, input gain, modulation detected, and current polarity. Nonrequested status outputs indicate the existence of analog limiting and modulation.

6.3.2.2 Digital Quadrature Modulator

The digital quadrature modulator (DQM) does interpolation and up-conversion of the modulated signal. Modulated signal input to the DQM is applied by the SM as I and Q components (16-bit parallel). The DQM performs trigonometric computations at a much higher sampling rate, which determines first-IF signal value and frequency. The modulated signal output from the DQM is supplied from its serial data port to the D/A converter.

6.3.2.3 Digital-to-Analog Converter

The digital input to the digital-to-analog (D/A) converter is the modulated signal from the DQM. This data arrives as serial data. The analog outp ut from the D/A converter is the first IF signal. In addition to the IF stage cir cuit, the first IF signal is supplied to the MCU control circuit, where it is rectified and filtered to generate fault logic.

6.4 IF Stage

6.3.2.4 Read-Only Memory

A programmable and erasable read-only memor y (PEROM) stores the modulator programs for both DSPs. These programs are transferred to the SM when the exciter is booted (powered up), then the SM transfers the program to the DQM. The nonvolatile PEROM retains its program for years. Its memory may be individually reprogrammed without erasing the entire chip.

Refer to Figure 6-1. The input to the IF stage is the first IF signal, which is supplied by the DSP modulator circuit. The first IF signal carries all the paging information on an intermediate carrier frequency. The IF stage performs direct up-conversion of the first IF signal to create the second IF signal, which carries the same paging information as the first IF signal, but on a higher carrier frequency. The second IF signal is applied to the RF stage through connector pair J10/P10. To produce the s econd IF si gnal, the IF stage con tains mixer -1 an d filter circuits. Supporting these circuits are VCO-1 and synthesizer-1 circuits. Figure 6-2 and Figure 6-3 show additional details.

6.4.1 Filter-1

This is an active filter circuit that acts as an anti-aliasing filter. It provides at least 20 dB of rejection at the sampling image frequency (300 kHz). Output of this filter goes to mixer-1.

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 THEORY OF OPERATION

d1021_s6

Figure 6-2 DSP Exciter MCU Circuit Functional Diagram

DSP Exciter Glenayre Document Number: 9110.01021 THEORY OF OPERATION Rev. B: 06/11/98

6.4.2 Mixer-1

Mixer-1 is the first heterodyne mixer. Inputs to mixer-1 are a modulated IF and a carrier. The modulated IF input is the first IF signal. The carrier input is supp lied by VCO- 1. The output from mixer-1 consists of two modulated carriers that are sums and difference frequencies of the inputs. These two frequencies are applied to the filter circuit.

6.4.3 Filter-2

The filter is centered at the second IF signal frequency with an 18-kHz bandwidth. The input to the filter consists of two modulated car riers. These ar e sum and difference f requencies supplied by mixer-1. Output from the filter is only the sum frequency. This modulated output is the second IF signal.

6.4.4 VCO-1

VCO-1 is the local oscillator for the IF stage. The input to VCO-1 is a dc control voltage . This voltage controls VCO-1 carrier frequ ency and is supplied by syn thesizer-1. The out put from VCO-1 is a sine-wave carrier and is applied to mixer-1.

6.5 MCU

6.4.5 Synthesizer-1

Synthesizer-1 controls VCO-1 carrier frequency by means of a phase-locked loop (PLL). PLL inputs are a carrier and a phase reference. The reference input is a 10-MHz carrier supplied by the 10-MHz reference circuit. The carrier input is from VCO-1. The PLL output is a dc control voltage. This voltage, set to cause the VCO-1 carrier to lock phase with the reference, is supplied to VCO-1.

Synthesizer-1 also performs all communications between the IF stage circu it and the MCU control circuit. A control input specifies the VCO-1 car rier f requency; this data is received over a serial data link when the exciter is booting or changing channels. Status outputs are a lock fault and a VCO1 level. The lock fault indicates loss of the carrier/reference phase lock. The VCO1 level is the VCO-1 control voltage.

Refer to Figure 6-4. Control outputs are supplied by the MCU control circuit to the other functional circuits. Likewise, status inputs are applied to the MCU control circuit from the other functional circuits. Discussions of these control and status signals are included with the information on the other major fun ctional circu its. To interface these control and status signals, the MCU control circuit contains an MCU, D/A converter, 8/16 bit converter , readonly memory , and a VSWR-fault detector . To light the front-panel LEDs, the MCU control circuit contains a bank of PNP swi tching tran sis tors. Refer to Figure 6-2 and the following text which describes this circuitry and its signal flow.

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 THEORY OF OPERATION

6.5.1 Microcontroller Unit (MCU)

The MCU contains a central processing unit (CPU), memories, peripherals, and other hardware on a single chip. T he primary internal function s of the MCU and their application in the exciter are described in the following list.

• An eight-bit remote input port accepts discrete low power mode, keyline, and channel selects from the controller interface c ircuit. An external edge detector is r equired to in put the channel selects.

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• Interrupt logic stops or reduces RF transmission when a fault input is received, e.g. a VSWR or PA fault.

• An on-board oscillator/clock generator, driven by an external crystal, times internal MCU functions. A synchro ni zed clock output times external functions.

• The MCU performs most interfacing through a parallel communications link: eight-bit data bus, sixteen-bit address bus , and a read/write line. External input and ou tput latch es expand the capability of this link.

• An eight-bit input/output port supplies discrete keyline, RF status, and chip select controls to the exciter and the PA.

• A serial peripheral interface (SPI) supplies synchronous serial frequency data to the IF stage and RF stage circuits. Individual commands load the program into either IF stage’s synthesizer-1 or RF stage synthesizer-2.

• An eight-input analog-to-digital (A/D) converter measures voltage inputs from the exciter and the PA. External multiplexers expand MCU analog inputs up to 41.

• A serial communications interface (SCI) exchanges asynchronous serial RS-232 data with the VT100 VDT. An external RS-232 driver buffers the MCU data, allowing it to be exchanged through external connector J3.

• A random-access memory (RAM) temporarily stores trans mitter fault and alarm values.

• An electrically-erasable read-only memory (EEPROM) permanently stores transmitter signal parameters.

6.5.2 Digital-to-Analog (D/A) Converter

A D/A converter generates an AGC reference voltage. The D/A converter inputs are data and select logic. The data, supplied by the MCU when the D/A is selected, represents the desired transmitter power output. The D/A converter o utput is an AGC r eference voltage. This voltage represents a level proportional to the desired transmitter power output. The AGC reference voltage, output via J6, is used by the PA to generate an AGC voltage.

6.5.3 8/16-Bit Converter

An 8/16-bit converter allows the MCU eight-bit data bus t o communicate with the 16-bit data bus of the DSP modulator circuit. The MCU must perform two read or write procedures, a low byte and a high byte, to each one of the DSP modulator circuits. The converter provides two status outputs to the MCU and DSP modulator. A data-available-to-MCU status indicates that the DSP modulator circuit has written dat a into the converter that th e MCU must read. A data-available-to-DSP status indicates that the MCU has written data into the converter that the DSP modulator circuit must read. If that DSP modulator circuit does not read data that the MCU has written, a DSP communication fault is generated.

DSP Exciter Glenayre Document Number: 9110.01021 THEORY OF OPERATION Rev. B: 06/11/98

6.5.4 Read-Only Memory

A programmable and erasable read-only memory (PEROM) stores the contr ol program for the transmitter. This program is transferred to the MCU when the exciter is booted up. The nonvolatile PEROM retains its program for years. Its memory may be individually reprogrammed without erasing the entire chip.

6.5.5 VSWR-Fa ult Detector

The exciter receives a VSWR signal from the PA through connector J6. This signal is a rectified dc voltage sample generated by the isolator. The voltage sample is monitored by the MCU to provide the value for the total reflected-power indication. The voltage sample is also monitored by a fault circuit in the exciter. If a factory-p reset voltage is exceeded, the fault circuit shuts down the transmitter or reduces power by an interrupt to the MCU.

6.5.6 Alarm Data-to-Logic Conversion

The transmitter controller reads logic alarm inputs; most are stored as data in the MCU control circuit. If the controller interface conver ts the data to individual logic s ignals for the controller, data from MCU control representing the alarms is clocked into a pair of latches. The latches convert the dat a into c ontinu ous log ic si gnals. These sig nals and ot hers cont rol a bank of NPN switching transistors that supply the actual logic signal to the controller. Control logic gates convert chi p contr ol s from t he MCU i nto a clock in put for th e latch es.

6.5.7 Alarm Data-to-Logic Conversion

The transmitter controller reads logic alarm inputs; most are stored as data in the MCU control circuit. If the controller interface conver ts the data to individual logic s ignals for the controller, data from MCU control representing the alarms is clocked into a pair of latches. The latches convert the dat a into c ontinu ous log ic si gnals. These sig nals and ot hers cont rol a bank of NPN switching transistors that supply the actual logic signal to the controller. Control logic gates convert chip controls from the MCU into a clock input for the latches.

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 THEORY OF OPERATION

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DSP Exciter Glenayre Document Number: 9110.01021 THEORY OF OPERATION Rev. B: 06/11/98

v0345l7

Figure 6-3 DSP Exciter-to-Controller Functional Diagram

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 THEORY OF OPERATION

v0345R.hgl

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Figure 6-3 DSP Exciter-to-Controller Functional Diagram

(Continued)

DSP Exciter Glenayre Document Number: 9110.01021 THEORY OF OPERATION Rev. B: 06/11/98

v0081.hgll

Figure 6-4 DSP Exciter Detailed Functional Diagram

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 THEORY OF OPERATION

v0077.hglr

d1021_s6

Figure 6-5 DSP Exciter IF-Stage Detailed

Functional Diagram

DSP Exciter Glenayre Document Number: 9110.01021 THEORY OF OPERATION Rev. B: 06/11/98

6.6 RF Assemblies

6.6.1 RF Stage Location

The RF stage circuits are located on two circuit boards, both housed within the exciter chassis. The exciter/control board is the main circuit board and the VCO/RF amplifier board is a selected option. The exciter/control board connects to the VCO/RF amplifier board through three connector pairs: J4/P4, J9/P9, and J10/P10. The VCO/RF amplifier board also contains BNC connector J3, wh ich extends thro ugh the rear panel of the exciter. This board contains most of the RF stage components ins ide an RF shield. A hole in the shield and the front panel provide access to an RF stage adjustment, which is marked VCO

ADJ on the front panel.

6.6.2 RF Assemblies

6.6.2.1 RF Stage Description

The RF stage is the portion of exciter circuitry between the IF stage and RF out and is the final major functional circuit. The RF stage determines transmitter RF out put frequency and the highest and lowest possible RF output frequencies (RF band). The transmitter can be operated at several RF bands, depending on the RF stage circuitry installed in the exciter .

6.6.2.2 RF Stage Bands

The selected VCO/RF amplifier board determines the RF band of the transmitter.

6.6.2.3 RF Stage Signal Flow

Refer to Figure 6-1. Input to the RF stage is the second IF signal, supplied by the IF stage circuit through connec tor p air J10 /P10. The second IF sign al carries pagi ng inf ormatio n on

a modulated carrier at the exciter’s second intermediate frequency. The RF stage converts the second IF signal into the exciter’s RF output. This RF output carries the same paging information as the second IF s ignal , but on a modulated carr ier of radio frequency. The RF output is normally applied to the PA through connector J3. To produce the RF output, the RF stage contains mixer-2, filters, and an amplifier. Supporting these circuits are VCO-2 and synth-2. The following text describes these five circuits and their signal flow.

6.6.2.3.1 Mixer-2

Mixer-2 is the second heterodyne mixer. Inputs to mi xer- 2 are a modulated IF and a carrier. The modulated IF is the second IF signal. The carrier is supplied by VCO-2. Output from mixer-2 consists of sum and difference frequencies of the inputs. The sum frequency is centered near the channel carrier, and the difference frequency about twice the second IF frequency below that. These two modulated RF carriers are applied to the filter circuit.

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 THEORY OF OPERATION

6.6.2.3.2 Filter

The filter is factory-selected and tuned, with a bandwidth determined by carrier frequency of the transmitter. The inputs to the filter consist of two modulated RF carriers and a key control.The two carriers are sum and dif feren ce freq uencies, s upp lied by mixer-2. The key control is supplied by the MCU control circu it through J4/P4. The output fr om the filter, supplied when the key control is received, is only the sum frequency. This modulated RF, centered near the channel on-frequency, is supplied to the amplifier.

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6.6.2.3.3 Amplifier

The amplifier provides amplification to the value listed in the specifications as exciter RF power out. The inputs to the amplifier consist of modulated RF and a key control. The modulated RF, mixer- 2 sum output frequency, is supplied through the filter. Key control is supplied by the MCU control cir cuit through J4/P4. Output from th e amplifier, supplied when the key control is received, is an amplified version of the modulated RF. This amplified output is the exciter RF output.

6.6.2.3.4 VCO-2

VCO-2 is the RF stage local oscillator. Inputs to VCO-2 are a dc control voltage and an adjustment. Dc control voltage is supplied by synthesizer-2. The adjustment, which varies the VCO2 control voltage level, is controlled through the front-panel VCO ADJ access. This control provides the means for VCO-2 to output a carrier frequency that would otherwise be beyond the range of the control voltage input. The carrier output, always second IF frequency below the channel carrier frequency, is applied to mixer-2.

6.6.2.3.5 Synthesizer-2

Synthesizer-2 controls VCO-2 carrier frequency by means of a phase-locked loop (PLL). PLL inputs to synthesizer-2 are a carr i er an d a ph ase referen ce. T he r eferen ce is a 1 0-MHz carrier supplied by the 10-MHz reference circuit. The carrier is the VCO-2 output. The PLL output from synthesizer-2 is a dc con trol vo ltage. This vo ltag e, set to caus e VCO-2 to lock phases with the reference, is applied to the VCO-2 control input.

Synthesizer-2 also performs all communications between the RF stage circuit and the MCU control circuit. A control input to synthesizer-2 specifies VCO-2 carrier frequency. This data is received over a serial data link when the exciter is booting or changing channels. Status outputs from synthesizer-2 are a lock fault and a VCO2 level. The lock fault indicates loss of the carrier/reference phase lock. VCO2 level is the VCO-2 control voltage.

6.7 Volt age Regulator Circuit

Refer to Figure 6-4 for pertinent information in the following discussion. The exciter receives 26-volt operating power throug h terminal board TB1o n the rear of the chassi s. The dc power indicator on the exciter front panel is connected to this input. This voltage is supplied to a 26-volt bus and is monitored by the MCU. An intermediate regulator reduces the 26 volts to 16.5 volts, which is supplied to th e two final regulators. One regulator generates 13.5 volts, which is su ppl ie d to a 13.5- vol t bus and mon itored by the MCU. The other regulator generates 5 volts, which is supplied to a 5-volt bus and monitored by the MCU.

DSP Exciter Glenayre Document Number: 9110.01021 THEORY OF OPERATION Rev. B: 06/11/98

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 MAINTENANCE

7 MAINTENANCE

7.1 Location of Maintenance Procedures

The DSP exciter is central to performing transmitter maintenance. Most maintenance of electrical assemblies is done via the VT100 interface. Any maintenance procedures which require adjusting controls within the exciter chassis are listed in this section.

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Replace the exciter if it has input power, as indicated by the front-panel DC POWER LED, but does not allow the user to make connection via the VT100 interface.

7.2 Test Equipment Required

See Paragraph 4.2, Test Equipment and Tools Required, for a list test equipment required to perform maintenance procedures.

7.3 VCO-2 Adjustment Procedure

Perform the VCO-2 adjustment procedur e after installi ng new VCO/RF ampl ifier boar d or after setting new channel carrier frequency. If the transmitter is to operate at more than one frequency, perform the multichannel adjustment procedure. If the transmitter is to operate at only one frequency, perform the single- chann el adjus tment pro cedur e. Refer t o the DSP exciter VDT manual as necessary.

7.3.1 VCO-2 Multichannel Adjustment Procedure

1. Set up VT100 VDT and select local control (see VDT manual).

2. Select transmitter channel of lowest frequency if not already selected.

3. Use tuning tool supplied to adjust VCO ADJ control through exciter front panel. Ad-

just for a reading of 3.3 to 3.5 volts on VCO2 status display.

4. Return transmitter to service.

Procedure is complete.

7.3.2 VCO-2 Single-Channel Adjustment Procedure

This procedure does not apply to wideband option.

1. Set up VT100 VDT and select local control (see VDT manual).

2. Select transmitter channel of operating frequency if not already selected.

3. Use tuning tool supplied to adjust VCO ADJ control through exciter front panel. Ad-

just for reading of 5.0 Vdc on VCO2 status display.

4. Return transmitter to service.

Procedure is complete.

DSP Exciter Glenayre Document Number: 9110.01021 MAINTENANCE Rev. B: 06/11/98

7.4 Over-The-Link Downloading

Over-the-link (OTL) code downloading allows GL-C2000 transmitter controller (GL-C2000) software, alarm matrix setup, and exciter so ftware to b e do wnloaded ov er the GL-C2000 link channel.

To properly use OTL downloading, GL-C2000 units must be programmed for the correct control group, site ID, and unit ID , which are integral to GL-C 2000 hardware and soft ware. When information is downloaded over the link channel, the control group , site IDs and/or unit IDs that are to receive the code must be specified.

Caution

If the control group, site ID, and unit ID are not specified, all units in the system accept the download information. In a mixed system, this can result in some of the transmitters being off the air. An example of this would be a GL-T8600 exciter receiving a GL-T8500 exciter programming code. The GL-T8600 exciter would not operate with this software and could result in a site visit to correct the problem.

Programming of control groups and site IDs is done via the GL-C2000 front port with a local connection or through a modem from a remote location. The control groups should be setup as a group of transmitters having the same configuration. For example, all GL-T850 0 transmitters could be in one control group and GL-T8600 transmitters be in another. This would allow one to download exciter software to all GL-T8500 transmitters at one time by selecting their control group. Any transmitter with a different control group would not accept the download information.

Site ID must be different for each site location, and is used when d ownloading infor mation to a specific site location. If there are multiple units at the same site, the site ID and unit ID need to be specified to download to a specific unit. If the unit ID is not specified, all units at that site accept the download.

Unit ID is programmed with a rotary switch in the GL-C2000; it must be different for each GL-C2000 at a site location. To download one specific unit, both site and unit ID must be specified for that unit; the unit with that site ID and unit ID is the only one that accepts the download.

For assistance on software downloading, call Glenayre Customer Support at 800-637-9181 or 217-223-3211.

7.5 On-The-Fly Channel/Mode Changing

Note

Different paging formats may require different digital deviation and offsets of paging data on the same RF carrier frequency. In the past, the only way to meet the different deviation requirements on the same frequency was to program two different channels for the same

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 MAINTENANCE

RF carrier frequency and then program those same two channels for a different digital deviation and offset. By changing channels, the deviation requirements of the paging formats were met. However, a channel change requires that the transmitter be unkeyed to allow time for PLL lock-up, which is a loss of air time.

The on-the-fly feature allows the following.

• Each channel can be programmed for four different digital modes (A, B, C, D).

• Each mode allows different digital deviation and offsets to be programmed.

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During normal paging operation, the GL-C2000 controller sends information to the transmitter telling it what channel to operate on and which one of the four digital modes to use. The four different digital modes of operation are controlled by the data 2 and data 3 lines into the GL-C2000 interface board on the DSP exciter. If the paging data requires a different deviation, the GL-C2000 transmitter controller can change the mode without having to change the channel. This allows the DSP exciter to accommod ate different paging format requirements without unkeying the transmitter to change channels.

7.5.1 Programming Example

To set up the exciter for the proper digital deviation and offset programming, make up a table similar to the one shown below. Next, access Digital Mode Setup menu and select View Channel Frequencies submenu.

Table 7-1 Deviation and Offset Programming

Channel

1/9 2/10 3/11 4/12 5/13 6/14 7/15 8/16 Mode/Dev. A 4500 4500 4500 4500 4500 4500 4500 4500 Mode/Offset A 0 +400 -400 +300 0 -300 0 0 Mode/Dev. B 4 800 4800 4800 4800 4800 4800 4800 4800 Mode/Offset B 0 +200 -200 +400 0 +400 -400 0 Mode/Dev. C 2 400 4200 4200 2400 2400 4200 2400 4200 Mode/Offset C00 00000 0 Mode/Dev. D 4200 2400 4200 2400 2400 2400 4200 2400 Mode/Offset D 0 0 +400 -400 0 0 0 0

Note

Initial release has setup similar to above table. Subsequent releases may have more programming variations.

DSP Exciter Glenayre Document Number: 9110.01021 MAINTENANCE Rev. B: 06/11/98

Note

When on-the-fly software is used with a QT-1000 interface board installed in the exciter, only the deviation and offset programming for mode D is available. References in the exciter menus pertaining to modes A, B, and C are blanked out.

7.5.1.1 DSP Exciter (2.1) / GL-C2000 (2.3)

The GL-C2000 detects a FLEX baud rate of 1600. When this condition is detected, the mode control lines to the DSP exciter chan ge it to mode B. If the FLEX baud rate is not detected, the mode control lines are set for mode A. This requires that mode A deviation (and offset) be set for POC SAG (512, 1200 or 2400 baud ), Golay, NEC or any other pag ing format other than FLEX requirements. Mode B dev iation and of fs et must be set for FLEX. Mode C is used in later releases.

7.5.1.2 DSP Exciter (3.0) / GL-C2000 (3.0) / GL3000 (6.0)

This software/hardware combination makes all four modes accessible on the fly (OTF). Refer to the latest GL-C2000 manual for OTF mode configuration.

7.6 16-Channel Operation

With 16-channel capability, the on-the-fly digital mode programming is only programmable on 8 channels. When channels 1 through 8 are programmed for different modes, channels 9 through 16 follow the same mode programming respectively (i.e. channel 9 is the same as 1, channel 10 is the same as 2, etc.). Selecting additional channels (9 through

16) is achieved by the GL-C2000 controller pulling mode-1 line low to the GL-C2000 interface board.

These parameters: Fwd Pwr alarm, Low Pwr alarm, Deviation, Offset, and Filtering are mapped from channels 1 throug h 8 to channels 9 through 16, res pectively . The center frequency is uniquely programmable for all 16 channels. The GL-C2000 only accesses channels 9 through 16 if it is configured for serial frequency-control mode.

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 MAINTENANCE

7.7 On-The-Fly Interface

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Figure 7-1 On-The-Fly GL-C2000 Control Lines to DSP Exciter

DSP Exciter Glenayre Document Number: 9110.01021 MAINTENANCE Rev. B: 06/11/98

Notes:

A GL-C2000 interface board must be installed in the DSP exciter whenever on-the-fly software is installed.

All J1 pin connections shown in Figure 7-1 are at the input to the GL-C2000 interface board in the DSP exciter.

Data 0 at the input of the GL-C2000 interface board controls Data 1 at its output. Data 1 at the input of the GL-C2000 interface board controls Data 2 at its output. Data 2 at the input of the GL-C2000 interface board controls Data 3 at its output. Data 3 at the input of the GL-C2000 interface board controls Data 4 at its output.

Mode 0 at the input of the GL-C2000 interface board controls Mode Sel 1 at its output. Mode 1 at the input of the GL-C2000 interface board controls Ch Sel 4 at its output.

Freq 0 at the input of the GL-C2000 interface board controls Ch Select 1 at its output. Freq 1 at the input of the GL-C2000 interface board controls Ch Select 2 at its output. Freq 2 at the input of the GL-C2000 interface board controls Ch Select 3 at its output.

7.8 Checkout

7.9 Troubleshooting

The DSP exciter has two funct ions; i t produces on-fr equenc y RF and has a microproces sor to handle input from the PA and transmitter controller. Checkout involves verifying that RF is produced and unkeying occurs during a fault condition.

The recommended troubleshooting level for the exciter is at the uni t level. That is, if the exciter fails to provide the transmitter system with a usable, modulated RF-drive signal and

all the exciter’s power, control, and signal inputs are normal, replace the exciter with a spare. Determine that the spare is compatible in hardware (VCO and RF amplifier) and software/firmware. Some parameters must be programmed into a replacement exciter for system compatibility.

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 REMOVAL AND REINSTALLATION

8 REMOVAL AND REINSTALLATION

Remove all input power from the transmitter cabinet before performing these procedures.

8.1 Exciter/PA Control Chassis

See Figure 8-1 for a detailed drawing.

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Memory PROMs in the replacement exciter should be th e s ame as in the original exciter unless the maintenance technician intends to modify exciter characteristics. Also, parameters such as channel frequencies, may be stored in nonvolatile RAM. Ensure that the replacement exciter is programmed correctly.

Note

8.1.1 Removal Procedure

1. Support exciter while removing the four screws from the front panel that secure it to the cabinet. Save screws for installation procedure.

2. Remove exciter from cabinet far enough to access back panel.

3. Disconnect connector J3 from connector P3 that is pigtailed off terminal board TB1 (dc power input).

4. If a controller interface I/O panel is mounted on exciter back panel, remove I/O panel; leave all wires connected to I/O panel.

5. Tag all connectors attached to the exciter back panel.

6. Remove all connectors attached to the exciter back panel. Leav e P3 con nector /wiring assembly connected to terminal board TB1 for now.

7. Remove exciter and tag wires connected to terminal board TB1 on P3 connector/wiring assembly.

8. Disconnect tagged wires from terminal board TB1. Save P3 connector/wiring assembly for instal lation procedure.

Procedure is complete.

8.1.2 Reinstallation Procedure

Note

A wideband DSP exciter that is installed in a GL-T8500 or GL-T8600 transmitter must have one rack unit of space between it and the power amplifier chassis.

1. Before installing exciter, connect wires on P3 connector/wiring assembly (from removal procedure) to terminal board TB1 on exciter back panel.

2. Connect connectors on transmitter to exciter back panel.

DSP Exciter Glenayre Document Number: 9110.01021 REMOVAL AND REINSTALLATION Rev. B: 06/11/98

3. If controller requires interface I/O board, install external interface I/O board on exciter back panel (see Paragraph 8.4).

4. Connect connector J3 to connector P3 that is pigtailed off of terminal board TB1.

5. Locate connector P3 that is pigtailed off of terminal board TB1. Disconnect connector P3 from connector J3.

6. Slide exciter into cabinet and secure with four screws saved from removal procedure.

Procedure is complete. Perform setup, adjustment, or calibration procedures as required.

8.2 Exciter Cover

These procedures must be performed with the exciter removed from the trans mitter cabinet. Refer to Figure 8-2 throughout these procedures.

8.2.1 Removal Procedure

1. Remove two sem screws from sides of exciter cover. Save sem screws for installation procedure.

2. Raise front of cover and extract back of cover from channel in back panel extrusion.

3. Remove exciter cover.

Procedure is complete.

8.2.2 Reinstallation Procedure

1. Insert exciter cover into channel on exciter back panel extrusion.

2. Lower cover so that fingerstock is behind exciter front panel.

3. While pressing down slightly on exciter cover: install two sem screws saved from removal procedure through sides of exciter cover.

Procedure is complete.

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 REMOVAL AND REINSTALLATION

v0151.hgl

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Figure 8-1 DSP Exciter Chassis Removal

and Reinstallation

DSP Exciter Glenayre Document Number: 9110.01021 REMOVAL AND REINSTALLATION Rev. B: 06/11/98

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Figure 8-2 DSP Exciter Cover Removal

and Reinstallation

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 REMOVAL AND REINSTALLATION

8.3 Exciter/Control Board

These procedures must be performed with the exciter removed from the trans mitter cabinet, and the exciter cover removed. Refer to Figure 8-3 throughout these procedures.

8.3.1 Removal Procedure

Note

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1. Remove controller interface board (see Paragraph 8.4 ).

2. Remove VCO/RF amplifier board (see Paragraph 8.5 ).

3. Remove three kep nuts and three screws from regulators U1, U2, and U58.

4. Remove shoulder washer from regulator U58.

5. Remove two jam nuts and two lock washers from connectors J7 and J8.

6. Remove two jack socket screws attached to connector J6 through back panel.

Save all hardware for reinstallation procedure.

7. Remove four sem screws from back pane l and remove back panel from exciter cha ssis. Some exciters use three sem screws and one standoff.

8. Remove insulator between back panel and regulator U58.

9. Remove two jack socket screws attached to connector J3 through front panel.

10. Remove two studded standoffs through exciter/control board.

11. Remove nine sem screws that attach exciter/control board to exciter chassis, and remove exciter/control board.

Procedure is complete.

8.3.2 Reinstallation Procedure

Use hardware saved from installation procedure.

Be careful to not overtighten hardware.

Note

Caution

1. Position exciter/control board onto exciter chassis and secure with nine sem screws.

2. Install two studded standoffs through exciter/control board.

3. Apply Vibra Tite or similar nonpermanent sel f-locking liquid adhesi ve to threads of the two jack socket screws to be used for connector J3. Apply only to top 1/4 inch of thread on each jack socket screw.

4. Install two jack-socket screws into connector J3 through front panel.

DSP Exciter Glenayre Document Number: 9110.01021 REMOVAL AND REINSTALLATION Rev. B: 06/11/98

5. Apply thermal compound as follows: between regulator U1 and back panel, between regulator U2 and back panel, between regulator U58 and insulator, and between insulator and back panel.

6. Install insulator between regulator U58 and back panel.

7. Position back panel on exciter chassis and secure with four sem screws. Some exciters use three sem screws and one standoff in the bottom right corner.

8. Apply Vibra Tite or similar nonpermanent self-locking liquid adhesive to threads of the two jack socket screws to be used for connector J6. Apply only to top 1/4 inch of thread on each jack-socket screw.

9. Install two jack socket screws into connector J6 through back panel.

10. Install two lock washers and two jam nuts over connectors J7 and J8.

11. Install shoulder washer into regulator U58.

12. Install three kep nuts and three screws through regulators U1, U2, and U58.

13. Install VCO/RF amplifier board (see Paragraph 8.5 ).

14. Install controller interface I/O board (see Paragraph 8.4).

Procedure is complete. After exciter is installed in transmitter cabinet, perform setup procedure if necessary (refer to the system and menu manuals).

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 REMOVAL AND REINSTALLATION

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Figure 8-3 DSP Exciter Control Board Removal and Reinstallation

DSP Exciter Glenayre Document Number: 9110.01021 REMOVAL AND REINSTALLATION Rev. B: 06/11/98

8.4 Interface I/O Board

These procedures must be performed with the exciter r emoved from the transmitter cabinet (see Paragraph 8.1), and the exciter cover remo ved (see Paragraph 8 .2). Refer to Figur e 8- 4 throughout the following procedures.

8.4.1 Removal Procedure

1. Remove jack socket screws (2 or 6) securing connector J4 (J1 an d J2 not always use d) to the rear panel of the exciter. Save jack socket screws for installation procedure.

2. Remove two sem screws securing interface board to standoffs. Save sem screws for installation procedure.

3. Grasp interface board at the center of connector P1. Pull up on board with a firm vertical motion to disengage connector P1 from connector J1 on the exciter/control board.

4. Remove interface board.

Procedure is complete.

8.4.2 Reinstallation Procedure

1. Position interface board into place by inserting connector J4 (and J1 and J2 if used) through openings in exciter rear panel.

2. Carefully align connector P1 on interface board with connector J1 on exciter/control board and en gage.

3. Secure interface board to standoffs with two sem screws saved from removal procedure.

4. Apply Vibra Tite or similar nonpermanent self-locking liquid adhesive to threads of the six jack socket screws saved from removal procedure. Apply only to top 1/4 inch of thread on each jack socket screw.

5. Screw the six jack socket screws through holes on exciter rear panel at either sides of connectors J1, J4, and J2.

Procedure is complete. After exciter is installed into transmitter cabinet, perform audio input adjustment procedure (see DSP VDT Menus manual, PN 9110.00259).

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 REMOVAL AND REINSTALLATION

8.5 VCO/RF Amplifier Board

8.5.1 Removal Procedure

1. Remove jam nut and lock washer from connector J3 on rear of exciter. Save jam nut

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and lock washer for installation procedure.

2. Remove five sem screws securing VCO/RF amplifier board to standoffs on exciter. Save sem screws for installation procedure.

3. Grasp VCO/RF amplifier board near connector P4. Pull up on board with a short vertical motion to disengage connect ors P 4/P9/P1 0 from conne ctors J4/J9/J1 0 on excit er/ control board.

4. Remove VCO/RF amplifier board.

Procedure is complete.

8.5.2 Reinstallation Procedure

1. Before installing VCO/RF amplifier board, verify that RF band includes desired transmitter operating frequencies.

2. Position VCO/RF amplifier board into place by inserting connector J3 through ho le in rear of exciter.

3. Carefull y align connectors P4/P9/P10 on VCO/RF amplifier board with connectors J4/J9/J10 on exciter/control board and engage.

4. Secure VCO/RF amplifier board to standoffs on exciter using five sem screws saved from removal procedure.

5. Install lockwasher and jam nut to connector J3 on rear of exciter using lockwasher and jam nut saved from removal procedure.

Procedure is complete. After exciter is installed into transmitter cabinet, perform VCO2 adjustment procedure. See Paragraph 7.3 for details.

DSP Exciter Glenayre Document Number: 9110.01021 REMOVAL AND REINSTALLATION Rev. B: 06/11/98

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Figure 8-4 DSP Exciter External Interface I/O Board

Removal and Reinstallation

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 REMOVAL AND REINSTALLATION

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Figure 8-5 DSP Exciter Interface Board Removal and Reinstallation

DSP Exciter Glenayre Document Number: 9110.01021 REMOVAL AND REINSTALLATION Rev. B: 06/11/98

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 OPTIONS

9 OPTIONS

9.1 Exciter/PA Control w/ QT-1000 Interface

The controller interface is the portion of exciter circuitry that connects the transmitter controller to the exciter. The controller interface dictates what kind of transmitter controller may operate the transmitter. The transmitter can be operated through one of several controllers depending on the interface circuitry installed with the exciter . T wo boards comprise this

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9.1.1 Reference Source

interface: the internal QT-1000 interface board and the external interface I/O board.

Control commands from the transmitter controller are connected through the interface circuit. This circuit supplies remote control to the microcontroller unit (MCU) control circuit. The VT100 VDT supplies local control. The MCU control circuit generates all control signals for the other circuits, and monitors their status. The MCU control circuit reports status back to the VT100 VDT and the interface circuit, which supplies the status to the transmitter controller.

A 10-MHz reference signal is provided by the controller via J8 on the exciter/control board.

9.1.2 Controller Interface Connector Functions (QT-1000)

Refer to Table 9-1, and Table 9-2 for a pin-by-pin description of signal functions. The controller interfaces with the transmitter through connectors J1, J2, and J5 and terminal board TB2 at the exciter back panel. J5 on the external I/O board connects to a standard RL-xx3 receiver, if installed. If a standard receiver is not installed, TB2 on the external I/ O board connects to any generic receiver. TB2 also makes connections to optional configurable QT-1000 alarm inputs and switching outputs. J1 on the internal interface board connects directly to TXC connector J1, and interfaces all signals except alarms. Alarm signals, consisting of transmitter alarm, fault, and status signals, are supplied directly to the QT-1000 controller connector J2 on the internal interface board.

9.1.3 Interface Conversion Functions (QT-1000)

Some signals exchanged between the controller and exciter originate with a format, voltage, or requirement incompatible with their destination. The QT-1000 interface performs signal conversions necessary to provide compatibility between the controller and exciter. The following describes any signal conversions made by the controller interface.

9.1.3.1 Analog-Mode A/D Conversion

The exciter DSP modulator circuit reads synchro nized serial data fo r its analog mode input signal, but the QT-1000 controller provides an analog signal. The controller interface converts the analog to appropriate data form for the DSP. The analog (FLAT AUDIO+,-) terminates across a balanced input circuit that also provides a level adjustment. The adjustment, when properly set by the AUDIO INPUT ADJUST pot through the exciter cover, provides analog to an A/D converter at the o ptimum 0-dBm level. The A/D conver ts analog

DSP Exciter Glenayre Document Number: 9110.01021 OPTIONS Rev. B: 06/11/98

into serial data, which is applied to the DSP through a synchronous data link. A synchronous data link is characterized by exchange of pulse streams for timing purposes. The A/D converter is clocked by a pulse generator circuit driven by the 10-MHz reference circuit.

9.1.3.2 FSK-Data-Bit Strapping

The exciter DSP modulator circuit reads two bits (DATA 1,2) from the QT-1000 for its digital FSK mode input signal. This allows transmitter operation in the four-level mode. Data bits 3 and 4 are unavailable with the QT-1000 interface (internally grounded).

9.1.3.3 Channel-Select-Bit Strapping

The exciter MCU reads two bits (CH SELECT 1,2) from the QT-1000 to determine the remotely-selected channel. As a result, the QT-1000 can comm and only four channels. The QT-1000 interface keeps bit 3 open (high). Refer to Table 9-6 for transmitter operating channel resulting from the channel select inputs.

9.1.3.4 Mode-Select-Bit Strapping

The exciter MCU reads one bit (MODE SELECT 1) from the QT-1000 to determine the remotely-selected mode. Refer to Table 9-7 for the transmitter operating mode resulting from the mode select input.

9.1.3.5 Power Sample D/A Conversion

The QT-1000 reads two 0-to-2.5-volt voltages for its forward and reflected power sample inputs, but these power values are stored as data in the exciter MCU control circuit. The QT -1 000 interface converts data to voltages of the appr opriate range for the QT-1000. Data from the MCU representing the forward and reflected powers is written into a dual D/A converter. The D/A converts data into two proportional dc voltages ranging from 0 volt to

2.5 volts (FWD PWR SAMPLE, REF PWR SAMPLE), which are applied to the QT-1000. Control logic gates ensure that data is written to the proper half of the D/A converter.

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 OPTIONS

Table 9-1 Interface Board Connector J4 (QT-1000)

J4-x Signal/Description J4-x Signal/Description

1 FWD PWR SAMPLE, analog out-

put to tx controller

14 AUDIO INPUT +, input from re-

ceiver or tx controller

2 AUDIO INPUT -, common 15 REF PWR SAMPLE, analog out-

put to tx controller

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3 TX GND 16 TONE DECODER OUTPUT,

logic output to tx controller

4 KEY IN, input from tx controller 17 DATA 1, digital data input from tx

controller

5 DATA 2, digital data input from tx

18 DATA 3, not connected

controller

6 CH SELECT 3, not connected 19 MODE SELECT 1, digital com-

mand input from tx controller

7 CH SELECT 4, not connected 20 LOW POWER MODE, logic

input from PA

8 F AUL T ALARM, digital output to

tx controller

21 VSWR ALARM, logic output to

tx controller

9 DATA4/CLK, not connected 22 CH SELECT 1, logic input from

tx controller

10 CH SELECT 2, logic input from

tx controller

23 MOD IND, logic output to tx con-

troller

11 LOW POWER ALARM, output

24 TEMP ALARM, logic output to tx

to tx controller

12 SHUTDOWN ALARM, output

25 RF IN PUT ALARM, logic output

to tx controller

13 Not used -- --

controller

to tx controller

DSP Exciter Glenayre Document Number: 9110.01021 OPTIONS Rev. B: 06/11/98

Table 9-2 Receiver Connector J5 Pin Functions

QT-1000 with External I/O Board

J5-X Function J5-X Function

1 No connection 9 No connection 2 Standard receiv er inp ut for audio in terface,

10 No connection

2 Vp-p, nominal 3 No connection 11 Return for standard receiver audio 4 No connection 12 Return for standard receiver RSSI input for

interface, 0.5-6.0 Vdc 5 No connection 13 No connection 6 Standard receiver ground for interface 14 Standard receiver-fault alarm input for in-

terface, LO=OK 7 No connection 15 No connection 8 Standard receiver squelch output for inter-

face, HI=unsquelched

Table 9-3 Remote Select Input vs. Channel (QT-1000)

Ch Sel 1 J1-5

Ch Sel 2 J1-24

Ch Sel 3 J1-nc

Selected Channel

Open (HI) Open (HI) Open (HI) 1 Ground (LO) Open (HI) Open (HI) 2 Open (HI) Ground (LO) Open (HI)3 3 Ground (LO) Ground (LO) Open (HI) 4

Table 9-4 Remote Select Input vs. Mode (QT-1000)

Mode Sel 1: J1-25 Selected Mode

Command ground (LO) An alog Command open (HI) 4 level

Note

Not all transmitters can operate in all of the modes.

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 OPTIONS

9.2 Exciter/PA Control with Standard Interface

The following major paragraphs describe the operation of the major items within the standard interface. Detailed figures are referenced as required.

The controller interface is the portion of exciter circuitry that connects the transmitter controller to the exciter. The controller interface dictates which transmitter controller may operate the transmitter. The transmitter can be operated through one of several controllers depending on the interface circuitry installed at the exciter. Two boa rds form this interface:

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the internal standard interface board and external exciter standard interface I/O board.

9.2.1 Reference Source

A 10-MHz reference signal is provided by the controller via J8 on the exciter/control board.

9.2.2 Controller Interface Connector Functions (Standard)

Refer to Table 9-1 for a pin-by-pin description of signal functions. The controller interfaces with the transmitter through connector J4 and terminal board TB2 at the exciter back panel. TB2 also makes connections to optional configurable alarm inputs and switching outputs.

9.2.3 Interface Conversion Functions (Standard)

Many of the signals exchanged between the controller and exciter originate with a format, voltage, or requirement incompatible with their destination. The standard interface performs signal conversions necessary to provide compatibility between the controller and exciter. The following describes signal conversions made by the controller interface.

9.2.3.1 Analog-Mode A/D Conversion

The exciter DSP modulator circuit reads synchro nized serial data fo r its analog mode input signal, but the transmitter controller p rovides an analog signal. The controller interface converts the analog to the appropriate data form for the DSP. Analog (FLAT AUDIO +,-) terminates across a balanced input circuit that also provides a level adjustment. The adjustment, when properly set by the AUDIO INPUT ADJUST pot through the exciter cover, provides analog to an A/D converter at the o ptimum 0-dBm level. The A/D conver ts analog into serial data, which is applied to the DSP through a synchronous data link. A synchronous data link is characterized by exchange of pulse streams for timing purposes. The A/D

converter is clocked by a pulse generator circuit driven by the exciter’s 10-MHz reference circuit.

DSP Exciter Glenayre Document Number: 9110.01021 OPTIONS Rev. B: 06/11/98

9.2.3.2 FSK-Data-Bit Strapping

The exciter DSP modulator reads two bits (DATA 1,2) from the controller for its digital FSK mode input signal. This allows transmitter operation in the two- or four-level mode. Data bits 3 and 4 are used for on-the-fly (OTF) operation.

9.2.3.3 Channel-Select-Bit Strapping

The exciter MCU reads four bits (CH SELECT 1,2,3,4) from the controller to determine the remotely-selected channel. Refer to Tab le 9 - 6 for the transmitter operating channel resulting from the channel select inputs.

9.2.3.4 Mode-Select-Bit Strapping

The exciter MCU reads one bit (MODE SELECT 1) from the controller to determine the remotely-selected mode. Refer to Table 9-7 for the transmitter operating mode resulting from the mode select input.

9.2.3.5 Power Sample D/A Conversion

The transmitter controller reads two 0-to-2.5-volt voltages for its forward and reflected

power sample inputs, but these power values are stored as data within the exciter’s MCU control circuit. The controller interface converts the data to voltages of the appropriate range for the transmitter controller. Data from the MCU representing the forward and reflected powers is written into a dual D/A converter. The D/A converts the data into two proportional dc vo ltages rangin g from 0 volt t o 2.5 volts (F WD PWR SAMPLE, RE F PWR SAMPLE), which are applied to the tr ansmitter con troller. Control logic gates ensure th at data is written to the proper half of the D/A converter.

9.3 Exciter/PA Control with I20 Interface

The following paragraphs describe th e operation of the major items within the I2 0 interface. Detailed figures are referenced, as required. The contro ller interface is the portion of exciter circuitry that connects the transmitter controller to the exciter. The controller interface dictates what kind of transmitter controller may operate the transmitter. The transmitter can be operated through one of several controllers dep ending on the interface circuitry installed (I20) at the exciter. Two boards form this in terface, the intern al I2 0 inter face b oard and the external I20 interface I/O board.

9.3.1 Reference Source

A 10-MHz reference sign al is provid ed by the cont roller via J8 on the excit er/control board.

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 OPTIONS

9.3.2 Controller Interface Connector Functions

Refer to Tab le 9 - 8 and Ta b l e 9 - 9 for a pin-by-pin description of signal functions. The exciter interfaces with the transmitter through connector J2 and the controller through J1.

Table 9-5 Interface Board Connector J4 (Standard)

J4-x Signal/Description J4-x Signal/Description

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1 FWD PWR SAMPLE, analog output to tx controller 14 AUDIO INPUT -, input from receiver or tx controller 2 AUDIO INPUT +, common 15 REF PWR SAMPLE, analog output to tx controller 3 TX GND 16 TONE DECODER OUTPUT, logic output to tx con-

troller 4 KEY IN, input from tx controller 17 DATA 1, digital data input from tx controller 5 DATA 2, digital data input from tx controller 18 DATA 3, digital command input from tx controller 6 CH SELECT 3, digital command input from tx con-

troller

7 CH SELECT 4, digital command input from tx con-

troller

19 MODE SELECT 1, digital command input from tx

controller

20 LOW POWER MODE, digital command input from

PA 8 FAULT ALARM, digital output to tx controller 21 VSWR ALARM, logic output to tx controller 9 DATA4/CLK, digital command input from tx control-

ler

10 CH SELECT 2, digital command input from tx con-

22 CH SELECT 1, digital command input from tx con-

troller

23 MOD IND, logic output to tx controller

troller 11 LOW POWER ALARM, output to tx controller 24 TEMP ALARM, logic output to tx controller 12 SHUTDOWN ALARM, output to tx controller 25 RF INPUT ALARM, logic output to tx controller 13 Not used -- --

Table 9-6 Remote Select Input vs. Channel (standard)

Ch Sel 1 J4-22

Ch Sel 2 J4-10

Ch Sel 3 J4-6

Ch Sel 4 J4-7

Selected Channel

DSP Exciter Glenayre Document Number: 9110.01021 OPTIONS Rev. B: 06/11/98

Table 9-6 Remote Select Input vs. Channel (standard) (continued)

Ch Sel 1 J4-22

Ground (LO) Ground (LO) Ground (LO) Open (HI) 8 Open (HI) Open (HI) Open (HI) Ground (LO) 9 Ground (LO) Open (HI) Open (HI) Ground (LO) 10 Open (HI) Ground (LO) Open (HI) Ground (LO) 11 Ground (LO) Ground (LO) Open (HI) Ground (LO) 12 Open (HI) Open (HI) Ground (LO) Ground (LO) 13 Ground (LO) Open (HI) Ground (LO) Ground (LO) 14 Open (HI) Ground (LO) Ground (LO) Ground (LO) 15 Ground (LO) Ground (LO) Ground (LO) Ground (LO) 16

Ch Sel 2 J4-10

Table 9-7 Remote Select Input vs. Mode (standard)

Mode Sel 1: J4-19 Selected Mode

Command ground (LO) Analog

Ch Sel 3 J4-6

Ch Sel 4 J4-7

Selected Channel

Command open (HI) 4-level

Not all of the transmitters can accommodate all of the modes.

9.3.3 I20 Interface Conversion Functions

Many signals exchanged between the controller and the exciter originate with a format, voltage, or requirement incompatible with their destination. The I20 interface performs signal conversions necessary to provide compatibility between the controller and exciter. The following text describes any signal conversions made by the controller interface.

9.3.3.1 FSK-Data-Bit Strapping

The exciter DSP modulator reads two bits (DATA 1,2) from the controller for its digital FSK mode input signal. This allows transmitter operation in the two- or four-level mode.

9.3.3.2 Channel-Select-Bit Strapping

The exciter MCU reads four bits (CH SEL 1, 2, 3, 4) to determine the remotely-selected channel. Refer to Table 9-6 for the transmitter operating channel resulting from the channel select inputs.

Note

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 OPTIONS

9.3.3.3 Mode-Select-Bit Strapping

The exciter MCU control circuit reads one bit (MODE SEL 1) from the controller to determine the remotely-selected mode. Refer to Ta ble 9 -7 for the transmitter operating mode resulting from the model-select input.

Table 9-8 Interface Board Connector J2

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J2-x Signal/Description J2-x Signal/Description

1 Not used 8 GND 2TxD+ 9 TxD3 KEY+ 10 KEY4 RxD+ 11 RxD 5 DATA0+ 12 DATA06 CLOCK+ 13 CLOCK7 DATA1+ 14 DATA1-

Table 9-9 Interface Board Connector J1

J1-x Signal/Description J1-x Signal/Description

1 CHASSIS 20 CLOCK2 CLOCK+ 21 DATA03 DATA0+ 22 DATA14 DATA1+ 23 DATA25 DATA2+ 24 DATA36 DATA3+ 25 GND 7FREQ0 26 FREQ1 8 FREQ2 27 MODE 0 9 MODE 1 28 MODE/AUX 10 ANALOG+ (not connected) 29 ANALOG- (not connected) 11 GND 30 GND 12 RxD- 31 RxD+ 13 TxD- 32 TxD+ 14 KEY- 33 KEY+

DSP Exciter Glenayre Document Number: 9110.01021 OPTIONS Rev. B: 06/11/98

Table 9-9 Interface Board Connector J1 (continued)

J1-x Signal/Description J1-x Signal/Description

15 DIG OUT 6 34 DIG OUT 7 16 DIG OUT 4 35 DIG OUT 5 17 DIG OUT 2 36 DIG OUT 3 18 DIG OUT 0 37 DIG OUT 1 19 _RESET

Table 9-10 Remote Select Input vs. Channel (I20)

Ch Sel 1 J1-7

Ch Sel 2 J1-26

Ch Sel 3 J1-8

Ch Sel 4 J1-9

Selected Channel

Open (HI) Open (HI) Open (HI) Open (HI) 1 Ground (LO) Open (HI) Open (HI) Open (HI) 2 Open (HI) Ground (LO) Open (HI) Open (HI) 3 Ground (LO) Ground (LO) Open (HI) Open (HI) 4 Open (HI) Open (HI) Ground (LO) Open (HI) 5 Ground (LO) Open (HI) Ground (LO) Open (HI) 6 Open (HI) Ground (LO) Ground (LO) Open (HI) 7 Ground (LO) Ground (LO) Ground (LO) Open (HI) 8 Open (HI) Open (HI) Open (HI) Ground (LO) 9 Ground (LO) Open (HI) Open (HI) Ground (LO) 10 Open (HI) Ground (LO) Open (HI) Ground (LO) 11 Ground (LO) Ground (LO) Open (HI) Ground (LO) 12 Open (HI) Open (HI) Ground (LO) Ground (LO) 13 Ground (LO) Open (HI) Ground (LO) Ground (LO) 14 Open (HI) Ground (LO) Ground (LO) Ground (LO) 15 Ground (LO) Ground (LO) Ground (LO) Ground (LO) 16

Table 9-11 Remote Select Input vs. Mode (I20)

Mode Sel 1: J1-27 Selected Mode

Ground (LO) Analog (not supported) Open (HI) Digital

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 Numerics

Numerics

10-MHz oscillator

setting of jumper 4-3

16-channel operation 7-4

A/D 9-5

d1021_ti.ix

AGC 6-7 alarm

forward power 7-4

low power 7-4 anti-aliasing filter 6-4 applicable documents 1-1 AUDIO INPUT ADJUST pot

QT-1000 interface 9-1

standard interface board 9-5

center frequency 7-4 channel

change time, wideband exciter 4-4

select - QT-1000 interface 9-4

selection - standard interface board 9-7 control board

part number 3-3

removal and reinstallation view 8-7 control group 7-2 control voltage 6-15 controls and indicators

AUDIO INPUT ADJUST 9-5

front panel 5-2

top view 3-5

VCO adj 6-14 CPU 6-7

EEPROM 6-7 EIA 2-1 EIS A 2-1 exciter

detailed functional diagram 6-12 part number 3-3 simplified functional diagram 3-6 wideband channel-change time 4-4

filter, anti-aliasing 6-4 filtering parameter 7-4 FLEX 7-4 frequency

channel center 7-4 control -serial mode 7-4 RF amplifier board 6-14 RF circuit 6-1 VCO board 6-14

functional diagram

RF stage 6-2 simple of exciter 3-6

GL3000 - OTF 7-4 GL-C2000 7-2, 7-3, 7-4, 7-6 Glenayre

locations 1-1, 1-2 Golay 7-4 grounding 4-4

D/A 6-4, 6-6, 6-7 deviation 7-3 deviation parameter 7-4 documents, applicable 1-1 DQM 6-4 DSP modulator description 6-3

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 I

I 6-3, 6-4 I/O

connectors 4-2 grounding 4-4 J1 - standard interface board 9-9 J2 - standard interface board 9-9 J4 standard interface board 9-7

d1021_ti.ix

rear panel 4-2 I20 interface 9-6 IF 6-4, 6-6, 6-14 inspection 4-1 interface 3-1

standard 9-5 interface board

part number 3-2 interface I/O board

part number 3-3

GL-C2000 interface 7-6

standard interface board 9-9 J10 6-14 J2 - standard interface board 9-9 J3 6-7, 6-14

pin assignments 4-2 J4 6-14, 6-15

standard interface board 9-7 J4 - QT-1000 interface 9-3 J6 6-7, 6-8

pin assignments 4-3 J8 9-1 J9 6-14 jumper - control board settings 4-3 JW1 setting 4-3 JW2 setting 4-3

low-power mode 6-7

manual part numbers 1-1 MCU 6-4, 6-6, 6-7 memory caution 4-1, 8-1 mixer 6-6

MCU 6-15

mode 7-3, 7-4

emission 6-7 select - QT-1000 interface 9-4 select - standard interface board 9-8

NEC 7-4

offset parameter 7-4 on-the-fly 7-2, 7-3, 7-4, 7-6, 9-6

interface view 7-5

OTF 9-6

GL-C2000 7-4

OTL 7-2

P10 6-14 P4 6-14, 6-15 P9 6-14 parallel communications link 6-7 part number

control board 3-3 exciter 3-3 interface board 3-2 interface I/O board 3-3

password protection

jumper 4-3 PEROM 6-4, 6-8 phase lock 6-6, 6-15 PLL 6-6, 6-15 POCSAG 7-4 power requirement 4-1

Glenayre Document Number: 9110.01021 DSP Exciter Rev. B: 06/11/98 Q

Q 6-3, 6-4 QT-1000 interface 9-1

channel select 9-4 J4 - main interface board 9-3 mode select 9-4

quadrature 6-3, 6-4

d1021_ti.ix

RAM 6-7 rear panel - I/O connectors 4-2 rear view 3-4 removal and reinstallation

exciter chassis 8-3

RF stage 6-15

description 6-14 functional diagram 6-2

SCI 6-7 serial frequency-control mode 7-4 site ID 7-2 SM 6-3, 6-4 specifications 2-1 SPI 6-7 standard interface board

channel selection 9-7 description 9-5 I/O 9-7 J1 9-9 J2 9-9

mode select 9-8 static caution 4-1 synthesizer 6-6, 6-15

VCO 6-6

front-panel adjustment 5-1 VCO ADJ 6-15, 7-1 VCO-2 adjustment 7-1 VDT 3-1 view

control board removal and reinstallation 8-7

exciter chassis 8-3

front panel 5-2

on-the-fly interface 7-5

rear 3-4

top 3-5 VSWR 6-8

front-panel adjustment 5-1

jumper internal or external 4-3 VT100 interface connector 4-2

use for maintenance 7-1

view 5-2

warranty 1-2 wideband exciter

channel-change time 4-4

test equipment requirement 4-1 tool requirement 4-1 top view 3-5 troubleshooting 7-6

unit ID 7-2

DSP Exciter Glenayre Document Number: 9110.01021 W Rev. B: 06/11/98

Glenayre Electronics GL T8100 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual