User's Manual

ITCR Locomotive Radio User Guide
© 2013 Meteorcomm LLC. All Rights Reserved. Proprietary and Confidential
8 Do Not Distribute 4/30/2013
installation or maintenance begins.
Table 1 Locomotive Radio Power Parameters
Parameter Locomotive Radio
Nominal DC Power Input Voltage
74VDC
Operational Range
45-100Vdc
Damage limit
120VDC
Current Drain (while transmitting
rated power)
7A peak max while transmitting into 50
ohm load
2.5A for max average operating current
4.2 Ethernet Connection
Locomotive radios use a non-standard Ethernet cable (MCC P/N 14001627-01) to
connect between a PC and the maintenance port of the radio. Configure the PC
network card with a fixed IP address of 10.10.1.254.
You will use XtermW, a Meteorcomm terminal emulation program, to connect with
and control the radio via commands issued at command prompts.
4.3 RF Output Termination
The Loco radio is rated for 50W PEP. Sufficient termination is required to protect
test equipment. Locomotive radios have a single TX/RX port with two additional
ports for receiving only. For transmitter testing, connect the test equipment to the
port labeled “TX/RX.”
5. Tuning the Locomotive 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