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Technical Manual
7. Alignment and Testing
The MX920 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 MX920 Base
Station. A number of procedures are required to fully initialise the MX920. 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 MX920. 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 MX920 Base Station
are initialised.
7.1.3 Adding and Setting Channel Alignments
The MX920 channel frequencies, subtones and other parameters are setup in the
channel edit screen of the radio Channel Edit Menu system and then downloaded to
the MX920.
© SPECTRA ENGINEERING 2003 Revision 1.1.4
Installation and Operation
www.spectraeng.com.au
for updates.
27
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