User's Manual

TABLE OF CONTENTS
401855 Page 3
SECTION 1: THEORY OF OPERATION .............................................................................................. 4
General Block Diagram.................................................................................................................. 4
General Block Diagram Definitions
..................................................................................... 4
Input/Output ........................................................................................................... 4
System Controller................................................................................................... 4
Modems
........................................................................................................... 5
Diversity Reception
.......................................................................................... 5
RX Injection............................................................................................................ 5
Transmitter ............................................................................................................. 5
Receiver 1/ 2/ 3...................................................................................................... 5
Power Supply......................................................................................................... 5
B32450-25 Base Station Section Descriptions ........................................................................... 6
System Controller
................................................................................................................ 6
Input/Output
........................................................................................................................ 6
Modem Switching
................................................................................................................ 6
Modem
...............................................................................................................................7
Receive Signal Strength Indication Comparator................................................................. 7
Baseband ............................................................................................................................ 8
Receiver Board
................................................................................................................... 8
IF Amplifier .......................................................................................................................... 8
Receiver Injection................................................................................................................ 9
Exciter Board
....................................................................................................................... 9
Analog Modulation ............................................................................................................ 10
Phase Locked Loop .......................................................................................................... 10
Power Amplifier
................................................................................................................. 11
SECTION 2: FACTORY TEST PROCEDURE .......................................................................................... 12
Equipment List ............................................................................................................................. 12
Programming and Configuring the Base Station ..................................................................... 13
Adjustment / Alignment Procedure............................................................................................ 14
Receiver Injection
.............................................................................................................. 14
Receiver
............................................................................................................................ 14
Diversity Reception
........................................................................................................... 15
Receive Data..................................................................................................................... 16
Exciter
............................................................................................................................. 17
Power Amplifier................................................................................................................. 17
SECTION 3: FCC LABEL.......................................................................................................................... 18
B32450-25 Base Station FCC Label Placement ........................................................................ 18
B32450-25 Base Station FCC Label............................................................................................ 18
APPENDIX A: B32450-25 CIRCUIT BOARD DIAGRAM.......................................................................... 19
APPENDIX B: B32450-25 TEST DATA SHEET........................................................................................ 23