Glenayre Electronics GL-T8200 Low Power Transmitter for 1 and 2way wireless data User Manual d user fm5 dsp1021 d1021 ti bk

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DSP Exciter
Rev. B: 06/11/98
DSP Exciter (EC)
User Manual
RELEASED
PN 9110.01021
Revision B
Specifications subject to change without notice
Copyright © 1998 Glenayre
All rights reserved. No part of this work may be reproduced or copied in any form or by
any means -- graphic, electronic, or mechanical, including photocopying, recording,
taping, or information-retrieval system -- without written permission of Glenayre.
Print Date: 06/10/98
Copyright © 1998 Glenayre
DSP Exciter
Document Change Record
Glenayre Document Number: 9110.01021
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
Copyright © 1998 Glenayre
Print Date: 06/10/98
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
DSP Exciter
Table of Contents
Table of Contents
d1021_ti.toc
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1.1
Manual Scope . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1.2
Applicable Documents
1.3
Glenayre Locations . . . . . . . . . . . . . . . . . . . . . . 1-1
. . . . . . . . . . . . . . . . . . . . 1-1
1.3.1
Product Warranty Information . . . . . . . . . . . . . . . . . . 1-2
1.3.2
Service Warranty Information . . . . . . . . . . . . . . . . . . 1-2
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3.1
General
3.2
Physical Description
3.3
Simplified Block-Diagram Description . . . . . . . . . . . . . . 3-1
. . . . . . . . . . . . . . . . . . . . . 3-1
INSTALLATION AND SETUP . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
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
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
5.1
Front-Panel Controls and Indicators . . . . . . . . . . . . . . . 5-1
5.2
Operating Instructions . . . . . . . . . . . . . . . . . . . . . 5-1
THEORY OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
6.1
Print Date: 06/10/98
. . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
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
Copyright © 1998 Glenayre
Page: -i
DSP Exciter
Table of Contents
Glenayre Document Number: 9110.01021
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
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
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
6.4
6.5
6.6
6.7
Page: -ii
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
Voltage Regulator Circuit . . . . . . . . . . . . . . . . . .
Copyright © 1998 Glenayre
6-15
Print Date: 06/10/98
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
d1021_ti.toc
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
7.1
Location of Maintenance Procedures . . . . . . . . . . . . . . . 7-1
7.2
Test Equipment Required
7.3
VCO-2 Adjustment Procedure
. . . . . . . . . . . . . . . . . 7-1
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
7.5
On-The-Fly Channel/Mode Changing
. . . . . . . . . . . . . . 7-2
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
REMOVAL AND REINSTALLATION . . . . . . . . . . . . . . . . . . . . 8-1
8.1
8.2
8.3
8.4
8.5
Print Date: 06/10/98
. . . . . . . . . . . . . . . . . . . 7-1
7.3.1
7.5.1
DSP Exciter
Table of Contents
Exciter/PA Control Chassis . . . . . . . . . . . . . . . . . . . 8-1
8.1.1
Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . 8-1
8.1.2
Reinstallation Procedure . . . . . . . . . . . . . . . . . . . . . 8-1
Exciter Cover . . . . . . . . . . . . . . . . . . . . . . . . 8-2
8.2.1
Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . 8-2
8.2.2
Reinstallation Procedure . . . . . . . . . . . . . . . . . . . . . 8-2
Exciter/Control Board . . . . . . . . . . . . . . . . . . . . . 8-5
8.3.1
Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . 8-5
8.3.2
Reinstallation Procedure . . . . . . . . . . . . . . . . . . . . . 8-5
Interface I/O Board . . . . . . . . . . . . . . . . . . . . . . 8-8
8.4.1
Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . 8-8
8.4.2
Reinstallation Procedure . . . . . . . . . . . . . . . . . . . . . 8-8
VCO/RF Amplifier Board . . . . . . . . . . . . . . . . . . . 8-9
8.5.1
Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . 8-9
8.5.2
Reinstallation Procedure . . . . . . . . . . . . . . . . . . . . . 8-9
Copyright © 1998 Glenayre
Page: -iii
DSP Exciter
Table of Contents
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1
9.1
9.2
9.3
Page: -iv
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
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
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
Copyright © 1998 Glenayre
Print Date: 06/10/98
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
DSP Exciter
List of Figures
d1021_ti.lof
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
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
DSP Exciter Interface Board Removal and Reinstallation . . . . . .
8-11
Figure 8-5
Print Date: 06/10/98
Copyright © 1998 Glenayre
Page: -v
DSP Exciter
List of Figures
Page: -vi
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
Copyright © 1998 Glenayre
Print Date: 06/10/98
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
DSP Exciter
List of Tables
d1021_ti.lot
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
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
Print Date: 06/10/98
Copyright © 1998 Glenayre
Page: -vii
DSP Exciter
List of Tables
Page: -viii
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
Copyright © 1998 Glenayre
Print Date: 06/10/98
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
DSP Exciter
GENERAL
GENERAL
1.1 Manual Scope
d1021_s1
This manual provides information for the Glenayre DSP exciter and contains information
on exciter connection, setup, and maintenance. Discussions and specifications include the
following:
• 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 .
Print Date: 06/10/98
Copyright © 1998 Glenayre
Page: 1-1
DSP Exciter
GENERAL
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
U.S.A.
Glenayre Customer Service - RF
One Glenayre Way
Quincy, Illinois 62301 USA
Phone: (217) 223-3211
Fax: (217) 223-3284
CANADA
Glenayre Customer Service - RF
1570 Kootenay Street
Vancouver, BC V5K 5B8 Canada
Phone: (604) 293-1611
Fax: (604) 293-4301
UNITED KINGDOM
Glenayre Electronics (UK) Ltd.
Unit 22 Challenge House
Sherwood Drive, Bletchley
Milton Keynes, MK3 6JD UK
Phone: 44 1 908 644 642
Fax: 44 1 908 644 643
SINGAPORE
Glenayre Electronics Singapore Pte. Ltd.
Block 5012 Ang Mo Kio Avenue 5
TechPlace II Unit 0503
Singapore 2056
Phone: (65) 481-1828
Fax: (65) 481-2838
1.3.1 Product Warranty Information
Glenayre warrants to the original purchaser that Glenayre products are free from 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 from Glenayre Customer Service. When requesting
a Return Authorization number, give the serial number of the unit. A description of the fault
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 defects in material or workmanship for ninety days from the date of repair. All
other terms of this limited warranty apply to the service warranty.
Page: 1-2
Copyright © 1998 Glenayre
Print Date: 06/10/98
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
DSP Exciter
SPECIFICATIONS
SPECIFICATIONS
Refer to Table 2-1, which lists the DSP exciter specifications.
d1021_s2
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.
Table 2-1 Exciter Specifications
Characteristic
Condition
Specification
Adjacent-channel noise
20-kHz channel spacing, analog mode,
per ETS 300 086, 7.5
-70 dBc
20-kHz channel spacing, in FSK mode,
per ETS 300 113, 8.5
-70 dBc
12.5-kHz channel spacing, analog mode,
per ETS 300 086, 7.5
-60 dBc
12.5-kHz channel spacing, FSK mode,
per ETS 300 113, 8.5
-60 dBc
Spurious output
Per ETS 300 113, 8.6
Per ETS 300 086, 7.6
-90 dBc
-90 dBc
RF output power
Keyed
250 mW nominal
Carrier frequency stability
Steady state, -30° to
+60° C
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
Audio response
Impedance with transformer
600 ohm or 5k ohms balanced
Flat, 50 to 2800 Hz
+/- 0.5 dB
preemphasized 6 dB per octave, 300 to
3000 Hz at 60% deviation
+/- 0.75 dB
Audio distortion (1-kHz reference at 25-kHz channel spacing
60% deviation)
Print Date: 06/10/98
Copyright © 1998 Glenayre
Less than 1.5%
Page: 2-1
DSP Exciter
SPECIFICATIONS
Glenayre Document Number: 9110.01021
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 25-kHz spacing flat, 15-kHz bandwidth
at 60% deviation)
25-kHz channel spacing preemphasized,
300 to 3000 Hz
-40 dB
AM hum and noise
-34 dB
Modulation types
Analog, 2-level FSK, 4-level FSK available with some interfaces
-55 dB
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 above 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
Page: 2-2
To 10,000 ft (3050 m)
Copyright © 1998 Glenayre
Print Date: 06/10/98
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
DSP Exciter
DESCRIPTION
DESCRIPTION
3.1 General
d1021_s3
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
internal frequency-determining hardware and software. It is also capable of communicating
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.
3.2 Physical Description
The exciter front panel contains eight LEDs, three adjustments, 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. The 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.
Print Date: 06/16/98
Copyright © 1998 Glenayre
Page: 3-1
DSP Exciter
DESCRIPTION
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
Table 3-1 Part Numbers of VCO/RF Amplifier Boards
transmitter
model
VCO/RFamplifier board VCO board
frequency band assembly part
(MHz)
No.
GL-T85/8601
929-941
263-0082-072
936-948
263-0082-070
924-936
transmitter
model
138-148
2100.00088
142-152
2100.00089
263-0082-069
147-157
2100.00090
900-960 (wb)
263-0082-051/052/
053/054/055/062
157-167
2100.00092
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
924-936
263-0082-053
138-148
2100.00088
GL-T8341
GL-T8541
GL-T8641
445-470
2000.00189
142-152
2100.00089
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
GL-T85/8600
GL-T8311
GL-T8411
GL-T8611
VCO/RFamplifier board VCO board
frequency band assembly part
(MHz)
No.
GL-T8311EC
GL-T8411EC
GL-T8311E
GL-T8411E
Table 3-2 Part Numbers of Interface Boards
DSP exciter-to-controller interface boards Interface board part No.
Page: 3-2
QT-1000 interface bd
265-0082-007
Standard interface bd
263-0082-036
I20 interface bd
265-0082-015
Copyright © 1998 Glenayre
Print Date: 06/16/98
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
DSP Exciter
DESCRIPTION
d1021_s3
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
Table 3-4 Assembly and Control Board Numbers
Print Date: 06/16/98
Exciter assembly No.
Control board No.
0100.02020 (88 us)
2000.02090
Copyright © 1998 Glenayre
Page: 3-3
DSP Exciter
DESCRIPTION
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
v0343.hgl
Figure 3-1 DSP Exciter Rear View
Page: 3-4
Copyright © 1998 Glenayre
Print Date: 06/16/98
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
DSP Exciter
DESCRIPTION
d1021_s3
v0344.hgl
Figure 3-2 DSP Exciter Top View
with Internal Controls and Indicators
Print Date: 06/16/98
Copyright © 1998 Glenayre
Page: 3-5
DSP Exciter
DESCRIPTION
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
v0251.hgl
Figure 3-3 DSP Exciter Simplified Functional Diagram
Page: 3-6
Copyright © 1998 Glenayre
Print Date: 06/16/98
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
DSP Exciter
INSTALLATION AND SETUP
INSTALLATION AND SETUP
4.1 Precautions and Hazards
d1021_s4
Caution
Pc boards within this assembly use static-sensitive
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 its memory.
4.2 Test Equipment and Tools Required
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 Installation
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.
Print Date: 06/10/98
Copyright © 1998 Glenayre
Page: 4-1
DSP Exciter
INSTALLATION AND SETUP
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
4.4.3 Input/Output Connections
Figure 3-1 shows the locations of I/O connectors; Table 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 connections 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
Stencil/Connector
Description
Additional
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
Page: 4-2
J3-X (front)
Signal
Description
TXD
Transmit data line
RXD
Receive data line
GND
Ground
1,4,6,7,8,9
Not used
Copyright © 1998 Glenayre
Print Date: 06/10/98
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
DSP Exciter
INSTALLATION AND SETUP
d1021_s4
Table 4-3 Control Board Connector J6 Pin Assignments
J6-X Signal
Description
J6-X Signal
Description
A/D1+
Multiplex analog input from PA
No. 1 multiplexer
A/D2+
Multiplex analog input from PA
No. 2 multiplexer
A/D3+
Multiplex analog input from PA
No. 3 multiplexer
10
A/D4+
Multiplexed analog input from PA
No. 4 multiplexer
AGC REF+
AGC reference voltage output to
PA, 1-12 Vdc
11
PA FAULT
PA fault input, HI=fault
PA GROUND No connection
12
PA GROUND No connection
PA GROUND No connection
13
INPUT
SELECT 1
One of four select outputs to PA
multiplexers, LO=20 digit enabled
for mux input decoder
INPUT
SELECT 2
One of four select outputs to PA
multiplexers, LO=21
14
INPUT
SELECT 3
One of four select outputs to PA
multiplexers, LO=22 digit enabled
for mux input decoder
KEY OUT
Key output to PA
15
AUX LATCH Latch-enable output to PA multiENABLE
plexers, LO=mux input decoder
reads the three select inputs. Not
used with E and EC models.
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 for
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
JW1
JW2
Print Date: 06/10/98
Version 2.10/later software
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
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
VSWR protection)
Set to B for internal VSWR protection
JW5
must be set to A
must be set to A
Copyright © 1998 Glenayre
Page: 4-3
DSP Exciter
INSTALLATION AND SETUP
Glenayre Document Number: 9110.01021
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 user manual for transmitter-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 the right side of the 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.
Page: 4-4
Copyright © 1998 Glenayre
Print Date: 06/10/98
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
DSP Exciter
INSTALLATION AND SETUP
d1021_s4
v0164.hgl
Figure 4-1 DSP Exciter/PA Control Circuit Boards
Interconnection Diagram
Print Date: 06/10/98
Copyright © 1998 Glenayre
Page: 4-5
DSP Exciter
INSTALLATION AND SETUP
Page: 4-6
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
Copyright © 1998 Glenayre
Print Date: 06/10/98
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
DSP Exciter
OPERATION
OPERATION
5.1 Front-Panel Controls and Indicators
d1021_s5
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.
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.
Print Date: 06/16/98
Copyright © 1998 Glenayre
Page: 5-1
DSP Exciter
OPERATION
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
mod.v0079.hgl
',*,7$/*5((1:+,/(02'8/$7('
$1$/2*
96:57+5(6+2/'/(9(/$'-867
VSWR
THRESHOLD ADJ
Figure 5-1 Front-Panel Controls and Indicators
Page: 5-2
Copyright © 1998 Glenayre
Print Date: 06/16/98
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
DSP Exciter
THEORY OF OPERATION
THEORY OF OPERATION
6.1 Exciter/PA Control
d1021_s6
Refer to Figure 6-1, which describes signal flow in the DSP exciter with the transmitter
controller interface. The following major paragraphs describe the operation of the major
items within the figure. Additional detailed figures are referenced, as required.
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 oscillator. 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
frequencies.
Table 6-1 Exciter RF/Main Circuit Frequencies
Exciter Output
Frequency (MHz)
First IF
Frequency (kHz)
Second IF
Frequency (MHz)
VCO-1 Frequency
(MHz)
VCO-2 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
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 signals, 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.
Print Date: 06/16/98
Copyright © 1998 Glenayre
Page: 6-1
DSP Exciter
THEORY OF OPERATION
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
v0123.hgl
Figure 6-1 DSP Exciter RF Stage Functional Diagram
Page: 6-2
Copyright © 1998 Glenayre
Print Date: 06/16/98
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
DSP Exciter
THEORY OF OPERATION
6.3 DSP Modulator
6.3.1 General
d1021_s6
The DSP modulator circuit converts the data into the first IF signal, which is fully modulated. The IF stage circuit converts the first IF signal into the second 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
processing to modulate and up-convert the paging information into the first IF signal. The
modulation type depends on the transmitter operating mode. 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 frequency and power output. The following text describes main exciter circuitry
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 discussion. 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.
Print Date: 06/16/98
Copyright © 1998 Glenayre
Page: 6-3
DSP Exciter
THEORY OF OPERATION
Glenayre Document Number: 9110.01021
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 output from the D/A converter is the first
IF signal. In addition to the IF stage circuit, the first IF signal is supplied to the MCU
control circuit, where it is rectified and filtered to generate fault logic.
6.3.2.4
Read-Only Memory
A programmable and erasable read-only memory (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.
6.4 IF Stage
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 second IF signal, the IF stage contains mixer-1 and
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.
Page: 6-4
Copyright © 1998 Glenayre
Print Date: 06/16/98
DSP Exciter
THEORY OF OPERATION
d1021_s6
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
Figure 6-2 DSP Exciter MCU Circuit Functional Diagram
Print Date: 06/16/98
Copyright © 1998 Glenayre
Page: 6-5
DSP Exciter
THEORY OF OPERATION
Glenayre Document Number: 9110.01021
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 supplied 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 carriers. These are sum and difference frequencies 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 frequency and is supplied by synthesizer-1. The output
from VCO-1 is a sine-wave carrier and is applied to mixer-1.
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 circuit and the MCU
control circuit. A control input specifies the VCO-1 carrier frequency; 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.
6.5 MCU
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 functional circuits. 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 switching transistors. Refer to Figure 6-2 and the following
text which describes this circuitry and its signal flow.
Page: 6-6
Copyright © 1998 Glenayre
Print Date: 06/16/98
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
DSP Exciter
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. The primary internal functions of the MCU and their application
in the exciter are described in the following list.
d1021_s6
• An eight-bit remote input port accepts discrete low power mode, keyline, and channel
selects from the controller interface circuit. An external edge detector is required to input
the channel selects.
• 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 synchronized 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 output latches
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 transmitter 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 output is an AGC reference 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 to 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 data into the converter that the
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.
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DSP Exciter
THEORY OF OPERATION
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
6.5.4 Read-Only Memory
A programmable and erasable read-only memory (PEROM) stores the control 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-Fault 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-preset 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 converts the data to individual logic signals for the
controller, data from MCU control representing the alarms is clocked into a pair of latches.
The latches convert the data into continuous logic signals. These signals and others control
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.
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 converts the data to individual logic signals for the
controller, data from MCU control representing the alarms is clocked into a pair of latches.
The latches convert the data into continuous logic signals. These signals and others control
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.
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DSP Exciter
THEORY OF OPERATION
d1021_s6
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
Print Date: 06/16/98
Copyright © 1998 Glenayre
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DSP Exciter
THEORY OF OPERATION
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
v0345l7
Figure 6-3 DSP Exciter-to-Controller Functional Diagram
Page: 6-10
Copyright © 1998 Glenayre
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Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
DSP Exciter
THEORY OF OPERATION
d1021_s6
v0345R.hgl
Figure 6-3 DSP Exciter-to-Controller Functional Diagram
(Continued)
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DSP Exciter
THEORY OF OPERATION
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
v0081.hgll
Figure 6-4 DSP Exciter Detailed Functional Diagram
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Copyright © 1998 Glenayre
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Rev. B: 06/11/98
DSP Exciter
THEORY OF OPERATION
d1021_s6
v0077.hglr
Figure 6-5 DSP Exciter IF-Stage Detailed
Functional Diagram
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DSP Exciter
THEORY OF OPERATION
Glenayre Document Number: 9110.01021
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, which extends through the rear panel of the exciter.
This board contains most of the RF stage components inside 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 output 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 connector pair J10/P10. The second IF signal carries paging information 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 signal, but on a modulated carrier 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 mixer-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.
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Copyright © 1998 Glenayre
Print Date: 06/16/98
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
6.6.2.3.2
DSP Exciter
THEORY OF OPERATION
Filter
d1021_s6
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 difference frequencies, supplied by mixer-2. The key
control is supplied by the MCU control circuit through J4/P4. The output from 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.
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 circuit through J4/P4. Output from the 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 carrier and a phase reference. The reference is a 10-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 control voltage. This voltage, set to cause 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 Voltage Regulator Circuit
Refer to Figure 6-4 for pertinent information in the following discussion. The exciter
receives 26-volt operating power through terminal board TB1on the rear of the chassis. 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 the two final regulators. One regulator
generates 13.5 volts, which is supplied to a 13.5-volt bus and monitored by the MCU. The
other regulator generates 5 volts, which is supplied to a 5-volt bus and monitored by the
MCU.
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Copyright © 1998 Glenayre
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DSP Exciter
THEORY OF OPERATION
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Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
Copyright © 1998 Glenayre
Print Date: 06/16/98
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
DSP Exciter
MAINTENANCE
MAINTENANCE
7.1 Location of Maintenance Procedures
d1021_s7
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.
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 procedure after installing new VCO/RF amplifier board 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-channel adjustment procedure. Refer to 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. Adjust 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. Adjust for reading of 5.0 Vdc on VCO2 status display.
4.
Return transmitter to service.
Procedure is complete.
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Copyright © 1998 Glenayre
Page: 7-1
DSP Exciter
MAINTENANCE
Glenayre Document Number: 9110.01021
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 software to be downloaded over 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-C2000 hardware and software.
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-T8500
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 downloading information
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.
Note
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
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
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Copyright © 1998 Glenayre
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Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
DSP Exciter
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.
d1021_s7
• 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.
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 accommodate 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
+400
-400
+300
-300
Mode/Dev. B
4800
4800
4800
4800
4800
4800
4800
4800
Mode/Offset B
+200
-200
+400
+400
-400
Mode/Dev. C
2400
4200
4200
2400
2400
4200
2400
4200
Mode/Offset C
Mode/Dev. D
4200
2400
4200
2400
2400
2400
4200
2400
Mode/Offset D
+400
-400
Note
Initial release has setup similar to above table. Subsequent releases may
have more programming variations.
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Copyright © 1998 Glenayre
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DSP Exciter
MAINTENANCE
Glenayre Document Number: 9110.01021
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 change 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 POCSAG (512, 1200 or 2400 baud), Golay, NEC or any other paging
format other than FLEX requirements. Mode B deviation and offset 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 through 8 to channels 9 through 16, respectively.
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.
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Rev. B: 06/11/98
DSP Exciter
MAINTENANCE
d1021_s7
7.7 On-The-Fly Interface
Figure 7-1 On-The-Fly GL-C2000 Control Lines to DSP Exciter
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DSP Exciter
MAINTENANCE
Glenayre Document Number: 9110.01021
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
The DSP exciter has two functions; it produces on-frequency RF and has a microprocessor
to handle input from the PA and transmitter controller. Checkout involves verifying that RF
is produced and unkeying occurs during a fault condition.
7.9 Troubleshooting
The recommended troubleshooting level for the exciter is at the unit 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.
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Copyright © 1998 Glenayre
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Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
DSP Exciter
REMOVAL AND REINSTALLATION
REMOVAL AND REINSTALLATION
Remove all input power from the transmitter cabinet before performing these procedures.
d1021_s8
8.1 Exciter/PA Control Chassis
See Figure 8-1 for a detailed drawing.
Note
Memory PROMs in the replacement exciter should be the same 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.
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. Leave P3 connector/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 installation 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.
Print Date: 06/10/98
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.
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REMOVAL AND REINSTALLATION
Glenayre Document Number: 9110.01021
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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 transmitter 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.
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Copyright © 1998 Glenayre
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Rev. B: 06/11/98
DSP Exciter
REMOVAL AND REINSTALLATION
d1021_s8
v0151.hgl
Figure 8-1 DSP Exciter Chassis Removal
and Reinstallation
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DSP Exciter
REMOVAL AND REINSTALLATION
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
v0171.hgl
Figure 8-2 DSP Exciter Cover Removal
and Reinstallation
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Copyright © 1998 Glenayre
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Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
DSP Exciter
REMOVAL AND REINSTALLATION
8.3 Exciter/Control Board
These procedures must be performed with the exciter removed from the transmitter cabinet,
and the exciter cover removed. Refer to Figure 8-3 throughout these procedures.
d1021_s8
8.3.1 Removal Procedure
Note
Save all hardware for reinstallation procedure.
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.
7.
Remove four sem screws from back panel and remove back panel from exciter chassis. 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
Note
Use hardware saved from installation procedure.
Caution
Be careful to not overtighten hardware.
Print Date: 06/10/98
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 self-locking liquid adhesive 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.
Copyright © 1998 Glenayre
Page: 8-5
DSP Exciter
REMOVAL AND REINSTALLATION
Glenayre Document Number: 9110.01021
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).
Page: 8-6
Copyright © 1998 Glenayre
Print Date: 06/10/98
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
DSP Exciter
REMOVAL AND REINSTALLATION
d1021_s8
v0170.hgl
Figure 8-3 DSP Exciter Control Board Removal and Reinstallation
Print Date: 06/10/98
Copyright © 1998 Glenayre
Page: 8-7
DSP Exciter
REMOVAL AND REINSTALLATION
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
8.4 Interface I/O Board
These procedures must be performed with the exciter removed from the transmitter cabinet
(see Paragraph 8.1), and the exciter cover removed (see Paragraph 8.2). Refer to Figure 84 throughout the following procedures.
8.4.1 Removal Procedure
1.
Remove jack socket screws (2 or 6) securing connector J4 (J1 and J2 not always used)
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 engage.
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).
Page: 8-8
Copyright © 1998 Glenayre
Print Date: 06/10/98
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
DSP Exciter
REMOVAL AND REINSTALLATION
8.5 VCO/RF Amplifier Board
d1021_s8
These procedures must be performed with the exciter removed from the transmitter cabinet
(see Paragraph 8.1), and the exciter cover removed (see Paragraph 8.2). Refer to Figure 85 throughout these procedures.
8.5.1 Removal Procedure
1.
Remove jam nut and lock washer from connector J3 on rear of exciter. Save jam nut
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 connectors P4/P9/P10 from connectors J4/J9/J10 on exciter/
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 hole in
rear of exciter.
3.
Carefully 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.
Print Date: 06/10/98
Copyright © 1998 Glenayre
Page: 8-9
DSP Exciter
REMOVAL AND REINSTALLATION
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
v0341.hgl
Figure 8-4 DSP Exciter External Interface I/O Board
Removal and Reinstallation
Page: 8-10
Copyright © 1998 Glenayre
Print Date: 06/10/98
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
DSP Exciter
REMOVAL AND REINSTALLATION
d1021_s8
v0342.hgl
Figure 8-5 DSP Exciter Interface Board Removal and Reinstallation
Print Date: 06/10/98
Copyright © 1998 Glenayre
Page: 8-11
DSP Exciter
REMOVAL AND REINSTALLATION
Page: 8-12
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
Copyright © 1998 Glenayre
Print Date: 06/10/98
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
DSP Exciter
OPTIONS
OPTIONS
9.1 Exciter/PA Control w/ QT-1000 Interface
d1021_s9
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. Two boards comprise this
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.
9.1.1 Reference Source
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 synchronized serial data for 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 optimum 0-dBm level. The A/D converts analog
Print Date: 06/16/98
Copyright © 1998 Glenayre
Page: 9-1
DSP Exciter
OPTIONS
Glenayre Document Number: 9110.01021
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 command 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-1000 interface converts data to voltages of the appropriate 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.
Page: 9-2
Copyright © 1998 Glenayre
Print Date: 06/16/98
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
DSP Exciter
OPTIONS
d1021_s9
Table 9-1 Interface Board Connector J4 (QT-1000)
Print Date: 06/16/98
J4-x
Signal/Description
FWD PWR SAMPLE, analog out- 14
put to tx controller
AUDIO INPUT +, input from receiver or tx controller
AUDIO INPUT -, common
15
REF PWR SAMPLE, analog output to tx controller
TX GND
16
TONE DECODER OUTPUT,
logic output to tx controller
KEY IN, input from tx controller
17
DATA 1, digital data input from tx
controller
DATA 2, digital data input from tx 18
controller
DATA 3, not connected
CH SELECT 3, not connected
19
MODE SELECT 1, digital command input from tx controller
CH SELECT 4, not connected
20
LOW POWER MODE, logic
input from PA
FAULT ALARM, digital output to 21
tx controller
VSWR ALARM, logic output to
tx controller
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 controller
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
--
--
Copyright © 1998 Glenayre
J4-x
Signal/Description
Page: 9-3
DSP Exciter
OPTIONS
Glenayre Document Number: 9110.01021
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
No connection
No connection
Standard receiver input for audio interface,
2 Vp-p, nominal
10
No connection
No connection
11
Return for standard receiver audio
No connection
12
Return for standard receiver RSSI input for
interface, 0.5-6.0 Vdc
No connection
13
No connection
Standard receiver ground for interface
14
Standard receiver-fault alarm input for interface, LO=OK
No connection
15
No connection
Standard receiver squelch output for interface, 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)
Ground (LO) Open (HI)
Open (HI)
Open (HI)
Ground (LO) Open (HI)3
Ground (LO) Ground (LO) Open (HI)
Table 9-4 Remote Select Input vs. Mode (QT-1000)
Mode Sel 1: J1-25
Selected Mode
Command ground (LO)
Analog
Command open (HI)
4 level
Note
Not all transmitters can operate in all of the modes.
Page: 9-4
Copyright © 1998 Glenayre
Print Date: 06/16/98
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
DSP Exciter
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.
d1021_s9
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 boards form this interface:
the internal standard interface board and external exciter standard 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.
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 synchronized serial data for its analog mode input
signal, but the transmitter controller provides 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 optimum 0-dBm level. The A/D converts 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.
Print Date: 06/16/98
Copyright © 1998 Glenayre
Page: 9-5
DSP Exciter
OPTIONS
Glenayre Document Number: 9110.01021
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 Table 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 voltages ranging from 0 volt to 2.5 volts (FWD PWR SAMPLE, REF PWR
SAMPLE), which are applied to the transmitter controller. Control logic gates ensure that
data is written to the proper half of the D/A converter.
9.3 Exciter/PA Control with I20 Interface
The following paragraphs describe the operation of the major items within the I20 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 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
(I20) at the exciter. Two boards form this interface, the internal I20 interface board and the
external I20 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.
9.3.1 Reference Source
A 10-MHz reference signal is provided by the controller via J8 on the exciter/control board.
Page: 9-6
Copyright © 1998 Glenayre
Print Date: 06/16/98
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
DSP Exciter
OPTIONS
9.3.2 Controller Interface Connector Functions
Refer to Table 9-8 and Table 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.
d1021_s9
Table 9-5 Interface Board Connector J4 (Standard)
J4-x Signal/Description
J4-x Signal/Description
FWD PWR SAMPLE, analog output to tx controller
14
AUDIO INPUT -, input from receiver or tx controller
AUDIO INPUT +, common
15
REF PWR SAMPLE, analog output to tx controller
TX GND
16
TONE DECODER OUTPUT, logic output to tx controller
KEY IN, input from tx controller
17
DATA 1, digital data input from tx controller
DATA 2, digital data input from tx controller
18
DATA 3, digital command input from tx controller
CH SELECT 3, digital command input from tx controller
19
MODE SELECT 1, digital command input from tx
controller
CH SELECT 4, digital command input from tx controller
20
LOW POWER MODE, digital command input from
PA
FAULT ALARM, digital output to tx controller
21
VSWR ALARM, logic output to tx controller
DATA4/CLK, digital command input from tx control- 22
ler
CH SELECT 1, digital command input from tx controller
10
CH SELECT 2, digital command input from tx controller
23
MOD IND, logic output to tx controller
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)
Print Date: 06/16/98
Ch Sel 1
J4-22
Ch Sel 2
J4-10
Ch Sel 3
J4-6
Ch Sel 4
J4-7
Selected
Channel
Open (HI)
Open (HI)
Open (HI)
Open (HI)
Ground (LO)
Open (HI)
Open (HI)
Open (HI)
Open (HI)
Ground (LO)
Open (HI)
Open (HI)
Ground (LO)
Ground (LO)
Open (HI)
Open (HI)
Open (HI)
Open (HI)
Ground (LO)
Open (HI)
Ground (LO)
Open (HI)
Ground (LO)
Open (HI)
Open (HI)
Ground (LO)
Ground (LO)
Open (HI)
Copyright © 1998 Glenayre
Page: 9-7
DSP Exciter
OPTIONS
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
Table 9-6 Remote Select Input vs. Channel (standard) (continued)
Ch Sel 1
J4-22
Ch Sel 2
J4-10
Ch Sel 3
J4-6
Ch Sel 4
J4-7
Selected
Channel
Ground (LO)
Ground (LO)
Ground (LO)
Open (HI)
Open (HI)
Open (HI)
Open (HI)
Ground (LO)
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 9-7 Remote Select Input vs. Mode (standard)
Mode Sel 1: J4-19
Selected Mode
Command ground (LO)
Analog
Command open (HI)
4-level
Note
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.
Page: 9-8
Copyright © 1998 Glenayre
Print Date: 06/16/98
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
9.3.3.3
DSP Exciter
OPTIONS
Mode-Select-Bit Strapping
d1021_s9
The exciter MCU control circuit reads one bit (MODE SEL 1) from the controller to
determine the remotely-selected mode. Refer to Table 9-7 for the transmitter operating
mode resulting from the model-select input.
Table 9-8 Interface Board Connector J2
J2-x
Signal/Description
J2-x
Signal/Description
Not used
GND
TxD+
TxD-
KEY+
10
KEY-
RxD+
11
RxD-
DATA0+
12
DATA0-
CLOCK+
13
CLOCK-
DATA1+
14
DATA1-
Table 9-9 Interface Board Connector J1
Print Date: 06/16/98
J1-x
Signal/Description
J1-x
Signal/Description
CHASSIS
20
CLOCK-
CLOCK+
21
DATA0-
DATA0+
22
DATA1-
DATA1+
23
DATA2-
DATA2+
24
DATA3-
DATA3+
25
GND
FREQ0
26
FREQ1
FREQ2
27
MODE 0
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+
Copyright © 1998 Glenayre
Page: 9-9
DSP Exciter
OPTIONS
Glenayre Document Number: 9110.01021
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)
Ground (LO)
Open (HI)
Open (HI)
Open (HI)
Open (HI)
Ground (LO)
Open (HI)
Open (HI)
Ground (LO)
Ground (LO)
Open (HI)
Open (HI)
Open (HI)
Open (HI)
Ground (LO)
Open (HI)
Ground (LO)
Open (HI)
Ground (LO)
Open (HI)
Open (HI)
Ground (LO)
Ground (LO)
Open (HI)
Ground (LO)
Ground (LO)
Ground (LO)
Open (HI)
Open (HI)
Open (HI)
Open (HI)
Ground (LO)
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)
Page: 9-10
Mode Sel 1: J1-27
Selected Mode
Ground (LO)
Analog (not supported)
Open (HI)
Digital
Copyright © 1998 Glenayre
Print Date: 06/16/98
d1021_ti.ix
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
DSP Exciter
Numerics
Numerics
10-MHz oscillator
setting of jumper 4-3
16-channel operation 7-4
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
A/D 9-5
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
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
Print Date: 06/10/98
Copyright © 1998 Glenayre
Page: index-1
d1021_ti.ix
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
DSP Exciter
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
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
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
J1
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
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
low-power mode 6-7
Print Date: 06/10/98
Copyright © 1998 Glenayre
Page: index-2
d1021_ti.ix
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
DSP Exciter
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
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
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
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
Print Date: 06/10/98
Copyright © 1998 Glenayre
Page: index-3
DSP Exciter
Page: index-4
Glenayre Document Number: 9110.01021
Rev. B: 06/11/98
Copyright © 1998 Glenayre
Print Date: 06/10/98

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