Table of Contents
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Technical Manual
Table of Contents
1.
General Description........................................................................................... 1
1.1
Physical Description.................................................................................. 2
1.1.1
1.2
Module Functional Description ................................................................. 6
1.2.1
1.2.2
2.
Installation and Operation................................................................................ 8
2.1
Installation ................................................................................................. 8
2.2
Screw Head Types..................................................................................... 8
2.3
Operation ................................................................................................... 9
2.3.1
2.3.2
3.
Standard Features ........................................................................................... 12
3.1
Programmable Channel Spacing ............................................................. 12
3.2
Programmable DCS / CTCSS encoder / decoder .................................... 12
3.2.1
3.3
3.3.1
3.4
Local Channel Change ............................................................................ 12
3.4.1
4.
Options.............................................................................................................. 14
4.1
Simplex Changeover Relay ..................................................................... 14
4.1.1
4.1.2
4.2
U29 Balanced and Isolated VF plus E&MError! Bookmark not defined.
5.
Technical Description ...................................................................................... 16
5.1
Exciter Section ........................................................................................ 16
5.2
Receiver Section...................................................................................... 16
5.2.1
5.2.2
5.2.3
5.2.4
5.2.5
5.3
Powe r Amplifier Module......................................................................... 19
6.
MX920 Base Station Fault Finding Procedure ............................................. 21
6.1
MX920 Base Station ............................................................................... 21
6.1.1
6.1.2
6.2
Microcontroller Section of PCB .............................................................. 23
© SPECTRA ENGINEERING 2003 Revision 1.1.4
Front Panel .................................................................................. 3
RF Module and Main Controller Assembly ................................. 6
Power Amplifier Module .............................................................. 7
Setting to Work ............................................................................. 9
Adjustments ................................................................................ 11
Description ................................................................................. 12
Description ................................................................................. 12
Description ................................................................................. 12
Description ................................................................................. 14
Installation ................................................................................. 14
General Radio Management ...................................................... 17
TX Signal Processing ................................................................. 18
RX Signal Processing ................................................................. 18
RF Power Control ...................................................................... 19
User Interface............................................................................. 19
Transmitter Section .................................................................... 21
Receiver Section ......................................................................... 22
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