User's Manual

Table Of Contents

ITCR Locomotive Radio User Guide

4/30/2013 Do Not Distribute 9

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 Locomotive radio, nominally 74 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. Connect a cable that has CAT5 ethernet connector on one end and an 8-pin M12

cable connector on the other end (MCC P/N 14001627-01). Connect the M12

connector to the 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.

2. Adjust a 10A DC power supply to 74 VDC and then disable it temporarily.

Connect the Locomotive power cable to the radio and then observing polarity

markings connect the cable to the power supply terminals.

3. Apply power to the radio. Wait 30 seconds to open an XtermW session. Use

the Edit/Configure Port window to set Port Type = TCP/IP, Protocol = Stream,

TCP/IP Settings Host = 10.10.1.254, Port 4000. Select Device Type = MCC 6100

SDR (which also applies to ITC radios). Return Character = CR, Data Format =

ASCII.

4. Attach a 50W 30 dB RF attenuator to the TX/RX1 N-type antenna connector.

Attach an (e.g., Agilent MXA or PXA) vector spectrum analyzer or similar to the

transmitter port for power and frequency measurements. The VSA should

contain either a precision stability reference oscillator or attach an external

rubidium reference to the VSA external reference input.