1.1 SCOPE OF
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LTR®, Low Tier, and Data Models . . . . . . . . . .
1.2 TRANSCEIVER DESCRIPTION . . . . . . . . . . .1-1
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Available Frequency Bands . . . . . . . . . . . . . . . .
Front and Remote Mounting . . . . . . . . . . . . . . .
NPSPAC Models (800 MHz Only) . . . . . . . . . .
Programming . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transceiver Alignment . . . . . . . . . . . . . . . . . . . .
1.3 PART NUMBER BREAKDOWN. . . . . . . . . . .1-2
1.4 TRANSCEIVER
1.7 FACTORY CUSTOMER
1.9 REPLACEMENT
2 INSTALLATION
2.1
Scope of Instructions . . . . . . . . . . . . . . . . . . . . .
Performance Tests . . . . . . . . . . . . . . . . . . . . . . .
Transceiver Programming . . . . . . . . . . . . . . . . .
Required Power Source . . . . . . . . . . . . . . . . . . .
2.2 MOUNTING THE TRANSCEIVER . . . . . . . . .2-2
Selecting A Mounting Location . . . . . . . . . . . . .
Installation Components . . . . . . . . . . . . . . . . . . .
Attaching Mounting Bracket . . . . . . . . . . . . . . .
2.3 POWER CABLE INSTALLATION . . . . . . . . .2-3
2.4 ACCESSORY CABLE INSTALLATION . . . .2-4
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessory Pigtail Installation . . . . . . . . . . . . . . .
Connecting Ignition Sense Wire. . . . . . . . . . . . .
Connecting Horn Alert Wire . . . . . . . . . . . . . . .
Other Accessory Cable Outputs . . . . . . . . . . . . .
2.5REMOTE CONTROL UNIT INSTALLATION2-6
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.6 USING AN EXTERNAL SPEAKER . . . . . . . .2-7
2.7 DATA CABLE INSTALLATION . . . . . . . . . . .2-7
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Data Cable Installation . . . . . . . . . . . . . . . . . . . .
2.8 KEY CAP
3.1GENERAL TRANSCEIVER DESCRIPTION 3-1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Circuit Protection (Fuses) . . . . . . . . . . . . . . . . . .
Synthesizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Audio/Logic Board . . . . . . . . . . . . . . . . . . . . . . .
Receiver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2POWER DISTRIBUTION AND SWITCHING 3-2
Power Switching Control . . . . . . . . . . . . . . . . . .
3.3AUDIO/LOGIC BOARD DIGITAL CIRCUIT 3-4
Microcontroller (U101) . . . . . . . . . . . . . . . . . . . .
Memory and Latch Programming . . . . . . . . . . . .
3.4 RECEIVE AUDIO/DATA PROCESSING . . . 3-7
Amplifier (U301B) . . . . . . . . . . . . . . . . . . . . . . .
Receive Audio Processing. . . . . . . . . . . . . . . . . .
Receive Data Processing . . . . . . . . . . . . . . . . . . .
Squelch Circuit (U304A, U304B) . . . . . . . . . . . .
3.5TRANSMIT AUDIO/DATA PROCESSING .
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3.6 DISPLAY BOARD . . . . . . . . . . . . . . . . . . . . . |
3.7SYNTHESIZER CIRCUIT DESCRIPTION
(UHF MODELS) . . . . . . . . . . . . . . . . . . . . . .
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Active Filter (Q800), Buffer Amplifier (Q801)
VCO and TCXO Modulation . . . . . . . . . . . . . .
Synthesizer Integrated Circuit (U804) . . . . . . .
Lock Detect . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Charge Pump . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shift Register (U800, U801) and Digital
Potentiometer (U802) Programming. . . . . . .
3.8RECEIVER CIRCUIT DESCRIPTION
(UHF MODELS) . . . . . . . . . . . . . . . . . . . . . .
Front End Filter . . . . . . . . . . . . . . . . . . . . . . . . .
RF Amplifier (Q201). . . . . . . . . . . . . . . . . . . . .
First Mixer (Q202), Injection Amplifier (Q204)
Second Mixer/Detector (U201) . . . . . . . . . . . . .
3.9TRANSMITTER CIRCUIT DESCRIPTION
(UHF MODELS) . . . . . . . . . . . . . . . . . . . . . .
First and Second Amplifiers . . . . . . . . . . . . . . .
Third Amp and Predriver . . . . . . . . . . . . . . . . .
Driver (Q600), Final (Q601) . . . . . . . . . . . . . . .
Antenna Switch . . . . . . . . . . . . . . . . . . . . . . . . .
Directional Coupler,
Power Control (U500A/B,
| February 2001 |
ii | Part No. |