User's Manual

ITCR Wayside User’s Manual
© 2013 Meteorcomm LLC. All Rights Reserved. Proprietary and Confidential
5/16/2013 9
5. Tuning the Wayside Radio
There are three parameters to test and potentially tune before/during RF testing:
•
• Master reference crystal oscillator frequency
• RF output power
• RF output channel
Factory technicians tune the master reference crystal oscillator and set the RF gain
for maximum rated output power. You may have to adjust the three parameters
before or during RF testing by entering commands using XtermW or another
terminal emulation program.
5.1 Equipment Required
1. 10A DC power supply at rated voltage of wayside radio, nominally 13.6 VDC.
2. Personal computer with Ethernet network adapter and Meteorcomm XtermW
or equivalent terminal program installed.
3. 30 dB 50W RF power attenuator.
4. Vector spectrum analyzer for power and frequency measurements.
5. Optional 8+ digit frequency counter for frequency measurements.
6. High stability time base accurate to 0.1 ppm. Can be internal to items 4 and 5.
5.2 Set up the Radio for Testing
1. Adjust a 10A DC power supply to 13.6 VDC and then disable its output.
Observing polarity of the power supply terminals, connect the wayside power
cable between the radio power connector and the power supply.
2. Connect one end of a CAT5 ethernet cable to the RJ-45 radio port labeled
MAINT. Connect the other end to a computer network card. The default radio
IP address is 10.10.1.254. Set the IP address of the computer network card to a
compatible fixed address such as 10.10.1.1. The computer should have
Meteorcomm XtermW or a similar terminal emulation program installed.