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Colby, Kansas | This is part of the FCC's narrowbanding process that is being done in all LMR (land mobile radio) chunks of the spectrum. Basically it is their attempt to free up additional spectrum in densely populated areas by cutting the size of each channel in half (channels used to be 25khz wide, now they are 12.5, and the FCC has given indications that some day they may force 6.25khz), thus when you go from 25 to 12.5 you have twice as many channels. As of Jan 1, 2013 anything still operating in wide-band mode (25khz channels) will be in violation of FCC rules. Narrow-band and wide-band radios can somewhat work together is voice traffic but the audio quality is terrible (if your listing to a narrow-band transmission on a wide band radio it will sound half as loud).
I highly doubt (almost certain) you will be able to hold a data link with a mix of narrow and wide-band equipment. If you are purchasing RTK link radios go ahead and go narrowband. As of sometime ago the FCC begain only issuing narrow-band licenses.
Clear as mud?
Lucas
Edited by LHaag 5/8/2011 11:21
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Channel spacing
