Alignment And Testing; Transceiver Setup, Calibration And Alignment; Setting The Model Number And Serial Number In The Radio; Setting The Configuration Information - RELM SMX920 Technical Manual

Base station and repeater
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SMX920 Base Station & Repeater

7. Alignment and Testing

The SMX920 test and alignment section assumes that the radio is a working module.
Due to ongoing development the instructions may vary please refer to

7.1 Transceiver Setup, Calibration and Alignment

This section explains how to setup, calibrate and align the complete SMX920 Base
Station. A number of procedures are required to fully initialise the SMX920. The
following test equipment will be needed:
A PC with a terminal emulator to run the built-in radio configuration menu
system software
RF Test Set (HP 8920) or equivalent
CRO (Cathode Ray Oscilloscope)
RF Power Meter (Watts)
RF Signal Generator
Multimeter
+13.8V DC power supply
The order of some, but not all, of the procedures is important to ensure correct setup
of the radio. The order of the procedures as described is recommended and those that
are critical are mentioned. If the radio has been previously setup and the user intends
to recalibrate and align the radio then steps 7.1.1, 7.1.2 and 7.1.3 can be ignored as the
model number, serial number, configuration and channel information will have
already been loaded.
Using a PC or handheld serial computer running standard communications terminal
software, connect the device RS232 serial port to the RJ45 Accessory socket at the
front panel of the SMX920. See section 8.3 for Establishing RS232 Communications .
7.1.1 Setting the Model Number and Serial Number
The user cannot alter the serial and model number, as this is factory set.

7.1.2 Setting the Configuration Information

Firstly the basic configuration information for the radio needs to be setup, this is done
at the factory. Using in built menu system, changes to the configuration information
needs to be filled out on the Configuration Screen. Once the configuration information
has been set then all of the programmable parameters within the SMX920 Base
Station are initialised.

7.1.3 Adding and Setting Channel Alignments

The SMX920 channel frequencies, subtones and other parameters are setup in the
channel edit screen of the radio configuration menu system and then downloaded to
the SMX920.
26
Technical Manual
www.RELM.com
for updates.
RELM/ BK RADIO

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