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TABLE OF CONTENTS
TABLE OF CONTENTS
ii
February 2001
Part No. 001-9800-001
1 GENERAL INFORMATION
1.1 SCOPE OF MANUAL. . . . . . . . . . . . . . . . . . . .1-1
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
LTR
®
, Low Tier, and Data Models . . . . . . . . . . 1-1
1.2 TRANSCEIVER DESCRIPTION. . . . . . . . . . .1-1
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Available Frequency Bands . . . . . . . . . . . . . . . . 1-1
Front and Remote Mounting . . . . . . . . . . . . . . . 1-2
NPSPAC Models (800 MHz Only) . . . . . . . . . . 1-2
Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Transceiver Alignment . . . . . . . . . . . . . . . . . . . . 1-2
1.3 PART NUMBER BREAKDOWN. . . . . . . . . . .1-2
1.4 TRANSCEIVER IDENTIFICATION . . . . . . . .1-3
1.5 ACCESSORIES. . . . . . . . . . . . . . . . . . . . . . . . .1-3
1.6 PRODUCT WARRANTY . . . . . . . . . . . . . . . . .1-4
1.7 FACTORY CUSTOMER SERVICE . . . . . . . .1-4
1.8 FACTORY RETURNS . . . . . . . . . . . . . . . . . . .1-5
1.9 REPLACEMENT PARTS . . . . . . . . . . . . . . . . .1-5
1.10 INTERNET HOME PAGE. . . . . . . . . . . . . . . . .1-5
2 INSTALLATION
2.1 GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Scope of Instructions . . . . . . . . . . . . . . . . . . . . . 2-1
Performance Tests . . . . . . . . . . . . . . . . . . . . . . . 2-1
Transceiver Programming . . . . . . . . . . . . . . . . . 2-2
Required Power Source . . . . . . . . . . . . . . . . . . . 2-2
2.2 MOUNTING THE TRANSCEIVER . . . . . . . . .2-2
Selecting A Mounting Location . . . . . . . . . . . . . 2-2
Installation Components. . . . . . . . . . . . . . . . . . . 2-2
Attaching Mounting Bracket . . . . . . . . . . . . . . . 2-2
2.3 POWER CABLE INSTALLATION . . . . . . . . .2-3
2.4 ACCESSORY CABLE INSTALLATION . . . .2-4
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Accessory Pigtail Installation. . . . . . . . . . . . . . . 2-5
Connecting Ignition Sense Wire. . . . . . . . . . . . . 2-5
Connecting Horn Alert Wire . . . . . . . . . . . . . . . 2-6
Other Accessory Cable Outputs . . . . . . . . . . . . . 2-6
2.5 REMOTE CONTROL UNIT INSTALLATION2-6
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Mounting Remote Control Unit . . . . . . . . . . . . . 2-6
2.6 USING AN EXTERNAL SPEAKER . . . . . . . .2-7
2.7 DATA CABLE INSTALLATION . . . . . . . . . . .2-7
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Data Cable Installation . . . . . . . . . . . . . . . . . . . . 2-8
2.8 KEY CAP KITS . . . . . . . . . . . . . . . . . . . . . . . . .2-8
Multi-Net and LTR-Net Models. . . . . . . . . . . . . 2-8
SMARTNET/SmartZone Models. . . . . . . . . . . . 2-9
3 CIRCUIT DESCRIPTION
3.1 GENERAL TRANSCEIVER DESCRIPTION 3-1
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Circuit Protection (Fuses) . . . . . . . . . . . . . . . . . . 3-1
Synthesizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Audio/Logic Board . . . . . . . . . . . . . . . . . . . . . . . 3-1
Receiver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
3.2 POWER DISTRIBUTION AND SWITCHING 3-2
Power Switching Control . . . . . . . . . . . . . . . . . . 3-2
Supply Switching . . . . . . . . . . . . . . . . . . . . . . . . 3-2
3.3 AUDIO/LOGIC BOARD DIGITAL CIRCUIT 3-4
Microcontroller (U101) . . . . . . . . . . . . . . . . . . . . 3-4
Memory and Latch Programming . . . . . . . . . . . . 3-6
3.4 RECEIVE AUDIO/DATA PROCESSING . . . 3-7
Amplifier (U301B) . . . . . . . . . . . . . . . . . . . . . . . 3-7
Receive Audio Processing. . . . . . . . . . . . . . . . . . 3-7
Receive Data Processing. . . . . . . . . . . . . . . . . . . 3-8
Squelch Circuit (U304A, U304B). . . . . . . . . . . . 3-9
3.5 TRANSMIT AUDIO/DATA PROCESSING . 3-9
Microphone Amplifier (U303B),
High-Pass Filter (U303C) . . . . . . . . . . . . . . . . 3-9
Summing Amplifier (U303D), Pre-Emphasis/
Limiter (U303A). . . . . . . . . . . . . . . . . . . . . . 3-10
Splatter Filter (U302B, U302C) . . . . . . . . . . . . 3-10
Transmit Data Circuit (U302D, U302A). . . . . . 3-10
3.6 DISPLAY BOARD . . . . . . . . . . . . . . . . . . . . . 3-10
3.7 SYNTHESIZER CIRCUIT DESCRIPTION
(UHF MODELS)
. . . . . . . . . . . . . . . . . . . . . . 3-11
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
Voltage-Controlled Oscillator. . . . . . . . . . . . . . 3-11
Active Filter (Q800), Buffer Amplifier (Q801) 3-12
VCO and TCXO Modulation . . . . . . . . . . . . . . 3-14
Synthesizer Integrated Circuit (U804) . . . . . . . 3-14
Lock Detect . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
Charge Pump. . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
Shift Register (U800, U801) and Digital
Potentiometer (U802) Programming. . . . . . . 3-15
3.8 RECEIVER CIRCUIT DESCRIPTION
(UHF MODELS)
. . . . . . . . . . . . . . . . . . . . . . 3-16
Front End Filter. . . . . . . . . . . . . . . . . . . . . . . . . 3-16
RF Amplifier (Q201). . . . . . . . . . . . . . . . . . . . . 3-17
First Mixer (Q202), Injection Amplifier (Q204) 3-17
Second Mixer/Detector (U201). . . . . . . . . . . . . 3-17
3.9 TRANSMITTER CIRCUIT DESCRIPTION
(UHF MODELS)
. . . . . . . . . . . . . . . . . . . . . . 3-19
First and Second Amplifiers . . . . . . . . . . . . . . . 3-19
Third Amp and Predriver . . . . . . . . . . . . . . . . . 3-19
Driver (Q600), Final (Q601) . . . . . . . . . . . . . . . 3-20
Antenna Switch . . . . . . . . . . . . . . . . . . . . . . . . . 3-20
Directional Coupler, Low-Pass Filter . . . . . . . . 3-21
Power Control (U500A/B, Q500-Q503) . . . . . . 3-21