ITCR Base Radio User's Guide
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9/8/2011
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Table 2. Base Radio Input Power Parameters
Parameter
Base Radio
Nominal DC Power Input Voltage
24VDC radio version 48VDC radio version
Operational Range
21-27 Vdc
(+/-12.5%)
42-54 Vdc
(+/-12.5%)
Damage limit
30VDC
60VDC
Current Drain (while transmitting
rated power)
11A peak max while
transmitting into 50
ohm load
7.5A for max
average operating
current
6A peak max while
transmitting into 50
ohm load
4A for max average
operating current
3.2
Ethernet Connection
Base radios use a standard CAT5 Ethernet cable connected 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.
3.3
RF Output Termination
The Base radio is rated for 75W PEP max into a 50 ohm resistive load. Base 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.” A suitable RF power
attenuator should be used to protect test equipment.
4.
Tuning the Base Radio
There are three parameters to test and potentially tune before/during RF testing:
Master reference crystal oscillator frequency
