Some useful info on radio frequencies:


(From M. Grant, REP Education Associate -

I only had a bout a half hour to research this subject and here is what I
came up with:

The 900 Mhz radio modem for the robot has a frequency band of 902-928 Mhz.
The range of the signal covers 100 to 300 feet. 35 out of 40 channels are
for competition use. Control System Radio Modems operate on channel 40 and
the Program/Debug Radios operate on channel 22.

Possible Interference sources may include automated utility meter readers,
automobile and railroad traffic signal control devices, wide-area data
networking, cordless telephones, wireless headphones and speakers, retail
security scanners, home security systems, lifesaving medical devices

FYI- This particular frequency band is an unlicensed one, so anyone can use
it.


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ALso some cordless phones, radio telephones on commercial airlines.