SMX920 Base Station & Repeater
Technical Manual
RELM/
BK RADIO
vi
6.3.2
RX Front End ............................................................................. 22
6.3.3
IF Section ................................................................................... 22
6.4
Exciter Module........................................................................................ 23
6.4.1
VCO Locking .............................................................................. 23
6.4.2
RF Power.................................................................................... 23
6.5
Power Amplifier...................................................................................... 23
7.
Alignment and Testing .................................................................................... 26
7.1
Transceiver Setup, Calibration and Alignment ....................................... 26
7.1.1
Setting the Model Number and Serial Number in the Radio ...... 26
7.1.2
Setting the Configuration Information ....................................... 26
7.1.3
Adding and Setting Channel Alignments.................................... 26
7.1.4
Setting CTCSS/DCS.................................................................... 27
7.1.5
Power Calibration...................................................................... 27
7.1.6
RSSI Calibration ........................................................................ 27
7.1.7
Temperature Calibration............................................................ 27
7.1.8
TX Power Adjustment................................................................. 28
7.1.9
Peak Deviation and Modulation Balance Alignment ................. 28
7.1.10
TX Centre Frequency Alignment................................................ 29
7.1.11
Microphone Line Input Level (Nominal Deviation Or Peak
Deviation Mode)........................................................................ 29
7.1.12
Mute Threshold Setting .............................................................. 30
8.
Appendices ....................................................................................................... 31
8.1
SMX920 Interface Connections .............................................................. 31
8.1.1
CN6 Simplex Relay..................................................................... 32
8.1.2
CN7 TX Output........................................................................... 32
8.2
SMX920 Test Points ............................................................................... 32
8.3
Establishing RS232 Communications ..................................................... 33
8.3.1
Software Menu System................................................................ 34
8.3.2
Interfacing Information .............................................................. 35
8.4
SMX920 Specifications........................................................................... 35
8.4.1
Operating Frequency Bands ...................................................... 35
8.4.2
General....................................................................................... 36
8.4.3
Transmit ..................................................................................... 37
8.4.4
Receive ....................................................................................... 38
8.4.5
Ancillaries .................................................................................. 38
8.5
SMX920 Model Number Configuration Guide....................................... 39
