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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