RELM SMX920, Техническое руководство

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Technical Manual Table of Contents
RELM/
BK RADIO
v
Table of Contents
1. General Description........................................................................................... 1
1.1 Physical Description.................................................................................. 2
1.1.1 Front Panel .................................................................................. 3
1.2 Module Functional Description................................................................. 6
1.2.1 RF Module and Main Controller Assembly ................................. 6
1.2.2 Power Amplifier Module .............................................................. 7
2. Installation and Operation................................................................................ 8
2.1 Installation................................................................................................. 8
2.2 Operation................................................................................................... 8
2.2.1 Setting to Work ............................................................................. 8
2.2.2 Adjustments ................................................................................ 10
3. Standard Features ........................................................................................... 11
3.1 Programmable Channel Spacing ............................................................. 11
3.2 Programmable DCS / CTCSS encoder / decoder.................................... 11
3.2.1 Description................................................................................. 11
3.3 Local Speaker, Mic Socket and Front Panel Mute / Squelch Controls ... 11
3.3.1 Description................................................................................. 11
3.4 Local Channel Change ............................................................................ 11
3.4.1 Description................................................................................. 11
4. Options.............................................................................................................. 13
4.1 Simplex Changeover Relay..................................................................... 13
4.1.1 Description................................................................................. 13
4.1.2 Installation ................................................................................. 13
5. Technical Description...................................................................................... 15
5.1 Exciter Section ........................................................................................ 15
5.2 Receiver Section...................................................................................... 15
5.2.1 General Radio Management ...................................................... 16
5.2.2 TX Signal Processing ................................................................. 17
5.2.3 RX Signal Processing ................................................................. 17
5.2.4 RF Power Control ...................................................................... 18
5.2.5 User Interface............................................................................. 18
5.3 Power Amplifier Module......................................................................... 18
6. SMX920 Base Station Fault Finding Procedure ........................................... 20
6.1 SMX920 Base Station ............................................................................. 20
6.1.1 Transmitter Section .................................................................... 20
6.1.2 Receiver Section ......................................................................... 21
6.2 Microcontroller Section of PCB.............................................................. 22
6.3 Receiver Module ..................................................................................... 22
6.3.1 VCO Locking.............................................................................. 22