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ManualsBrandsSpectra Engineering ManualsElectronicsMX800-RADIO BASE STATION TRANSCEIVER/ REPEATER
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Table Of Contents
MX800 Transceiver Table of Contents
5.1.7 Temperature Calibration ............................................... 65
5.1.8 TX Power Adjustment .................................................... 65
5.1.9 Peak Deviation and Modulation Balance ..................... 66
5.1.10 TX Centre Frequency Alignment ................................... 67
5.1.11 TX Line Input Level and Nominal Deviation
Alignment ...................................................................... 68
5.1.12 RX Line Output Level Adjustment ................................. 70
5.1.13 TX VF Loop Back Level ................................................ 70
5.1.14 Mute Threshold Setting ................................................. 70
5.2 Module Level Test Procedures ................................................... 71
5.2.1 Exciter Module .............................................................. 71
5.2.2 Receiver Module ............................................................ 72
5.2.3 Power Amplifier Module ............................................... 74
5.2.4 VCO Board .................................................................... 75
5.2.5 Microcontroller Module ................................................ 75
6. MX800 Base Station Fault Finding Procedure ................................... 77
6.1 MX800 Base Station .................................................................. 77
6.1.1 Transmitter Section ....................................................... 77
6.1.2 Receiver Section ............................................................ 78
6.2 Microcontroller PCB .................................................................. 79
6.3 Receiver Module ........................................................................ 79
6.3.1 VCO Locking. ................................................................ 79
6.3.2 RX Front End ................................................................ 79
6.4 IF Section ................................................................................... 80
6.5 Exciter Module ........................................................................... 80
6.5.1 VCO Locking. ................................................................ 80
6.5.2 RF Power ...................................................................... 81
6.6 Power Amplifier ......................................................................... 81
7. Appendices ............................................................................................. 83
7.1 MX800 Interface Connections ................................................... 83
7.1.1 CN1 DB15 Female Line I/O Connector ........................ 84
7.2 CN2 DB9 Female Monitor Connector ....................................... 86
7.3 CN3 DB25 Female Digital I/O Connector ................................. 87
7.3.1 CN4 DB9 Male RS232 Connector ................................. 88
7.3.2 CN6 Simplex Relay/External Reference ........................ 88
7.3.3 CN7 RX Input ................................................................ 89
7.3.4 CN8 TX Output .............................................................. 89
7.3.5 CN9 RJ45 ...................................................................... 89
7.3.6 CN5 DC Power Input .................................................... 89
7.4 MX800 Specifications ................................................................ 90
7.4.1 Operating Frequency Bands ......................................... 90
7.4.2 General .......................................................................... 90
© SPECTRA ENGINEERING 2008 Revision 4.3.1B
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