Ericsson Scan And System Portable Radios LPE-200 User Manual
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AE/LZB 119 1902 R1A
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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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