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AE/LZB 119 1902 R1A
3
SPECIFICATIONS......................................................................................................................................................................4
GENERAL...............................................................................................................................................................................4
RECEIVE ................................................................................................................................................................................5
TRANSMIT.............................................................................................................................................................................5
DESCRIPTION ...........................................................................................................................................................................6
MECHANICAL.......................................................................................................................................................................7
OPTIONS AND ACCESSORIES ...............................................................................................................................................7
OPERATION...............................................................................................................................................................................8
CONTROLS ............................................................................................................................................................................8
KEYPAD SCAN/SYSTEM FUNCTIONS..............................................................................................................................9
CIRCUIT ANALYSIS...............................................................................................................................................................10
SOFTWARE..........................................................................................................................................................................10
RECEIVER............................................................................................................................................................................10
RX Front End.....................................................................................................................................................................10
Rx Back End......................................................................................................................................................................11
TRANSMITTER ...................................................................................................................................................................13
Transmit Frequency Generation.........................................................................................................................................13
TX/Converter/Modulator (N150).......................................................................................................................................13
SAW Transmit Band Pass Filter 1.....................................................................................................................................14
MMIC Buffer Amplifier ....................................................................................................................................................14
SAW Transmit Band Pass Filter 2.....................................................................................................................................14
Power Amplifier (N101)....................................................................................................................................................14
Directional Coupler (W100)..............................................................................................................................................14
Power Sensor Circuit (N102-A).........................................................................................................................................14
Power Control Buffer (N102-B) ........................................................................................................................................15
Transmit Low-Pass Filter/Antenna Switch.........................................................................................................................15
Transmit Modulation .........................................................................................................................................................15
SYNTHESIZER.....................................................................................................................................................................15
Dual Synthesizers (N203)..................................................................................................................................................15
Bilateral Switch (N201).....................................................................................................................................................15
Main Voltage Controlled Oscillator (U200) ......................................................................................................................15
Main Synthesizer (N203)...................................................................................................................................................16
Auxiliary Synthesizer (N203) ............................................................................................................................................16
Reference Oscillator (U201)..............................................................................................................................................16
DC POWER DISTRIBUTION..............................................................................................................................................16
Synthesizer Regulator (N290)............................................................................................................................................16
Receiver Regulator (N490)................................................................................................................................................16
Transmit Regulator (N190)................................................................................................................................................16
Tx Switch (V192) ..............................................................................................................................................................17
B+ Switch (V191)..............................................................................................................................................................17
Analog Regulator (N900) ..................................................................................................................................................17
+5V-D Switching Regulator (N902)..................................................................................................................................17
LCD NEGATIVE BIAS GENERATOR ...............................................................................................................................18
SERVICE...................................................................................................................................................................................18
EQUIPMENT REQUIRED...................................................................................................................................................18
PROGRAMMING.................................................................................................................................................................18
Personality Programming...................................................................................................................................................18
Flash Programming............................................................................................................................................................19
Programming Mode ...........................................................................................................................................................19
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