Motorola EP450 Service Manual page 171

4
Transmitter Power Amplifier, UHF 403-440 MHz Theory Of Operation ..............................7-3
Transmitter Power Amplifier, UHF 438-470 MHz Theory Of Operation ..............................8-3
Transmitter Power Amplifier, UHF 465-495 MHz Theory Of Operation ..............................9-3
Transmitter, UHF 403-440 MHz Theory Of Operation ........................................................7-3
Transmitter, UHF 438-470 MHz Theory Of Operation ........................................................8-3
Transmitter, UHF 465-495 MHz Theory Of Operation ........................................................9-3
Troubleshooting Tables, UHF............................................................................................10-1
Troubleshooting Table for Board and IC Signals, UHF .....................................................10-6
Troubleshooting Table for Board and IC Signals, VHF 146-174 MHz .................................5-6
Troubleshooting Table for Receiver, UHF .........................................................................10-1
Troubleshooting Table for Receiver, VHF 146-174 MHz .....................................................5-1
Troubleshooting Table for Synthesize, UHF......................................................................10-3
Troubleshooting Table for Synthesize, VHF 146-174 MHz .................................................5-3
Troubleshooting Table for Transmitter, UHF .....................................................................10-4
Troubleshooting Table for Transmitter, VHF 146-174 MHz .................................................5-4
U
UHF 403-440 MHz Theory Of Operation ............................................................................7-1
UHF 438-470 MHz Theory Of Operation ............................................................................8-1
UHF 465-495 MHz Theory Of Operation ............................................................................9-1
UHF 403-440 MHz Theory Of Operation ............................................................................7-1
Introduction ...................................................................................................................7-1
UHF Receiver................................................................................................................7-1
Receiver Front End ...........................................................................................7-1
Receiver Back End............................................................................................7-2
UHF Transmitter............................................................................................................7-3
Transmitter Power Amplifier ..............................................................................7-3
Antenna Switch .................................................................................................7-3
Harmonic Filter ..................................................................................................7-3
Antenna Matching Network .....................................................................................7-4
Power Control..........................................................................................................7-4
UHF Frequency Generation Circuitry............................................................................7-4
Fractional-N Synthesizer .........................................................................................7-5
Voltage Controlled Oscillator (VCO)........................................................................7-6
Keypad ..........................................................................................................................7-7
UHF 438-470 MHz Theory Of Operation ............................................................................8-1
Introduction ...................................................................................................................8-1
UHF Receiver................................................................................................................8-1
Receiver Front End .................................................................................................8-1
Receiver Back End..................................................................................................8-2
UHF Transmitter............................................................................................................8-3
Transmitter Power Amplifier ....................................................................................8-3
Antenna Switch .......................................................................................................8-3
Harmonic Filter ........................................................................................................8-3
Antenna Matching Network .....................................................................................8-4
Power Control..........................................................................................................8-4
UHF Frequency Generation Circuitry............................................................................8-4
Fractional-N Synthesizer .........................................................................................8-5
Voltage Controlled Oscillator (VCO)........................................................................8-6
Keypad ..........................................................................................................................8-7
November 24, 2003
INDEX
HKLN4216A