Oops, broke my hyperlinks: 47 CFR Part 95B §95.563 "FRS Channels" (link <https://www.ecfr.gov/current/title-47/chapter-I/subchapter-D/part-95/subpart-B/section-95.563> ) 47 CFR Part 95E §95.1763 "GMRS Channels" (link <https://www.ecfr.gov/current/title-47/chapter-I/subchapter-D/part-95/subpart-E/section-95.1763> )
On Mon, Feb 21, 2022 at 1:43 PM Chris Romp <chrisr...@gmail.com> wrote: > Hello, > > I have a question about how CHIRP handles GMRS radios, e.g. BTech GMRS V1 > and Retevis RB26. I've noticed that CHIRP enforces that GMRS channels > follow the FRS channel number and frequency pairings, e.g. Channel 1 is > 462.5625, Channel 18 is 462.625, etc. I've been trying to find in the FCC > regs if this mapping is a requirement of GMRS operation. The only place > I've found the channels spelled out is on 47 CFR Part 95B §95.563 "FRS > Channels" (link > <https://www.ecfr.gov/current/title-47/chapter-I/subchapter-D/part-95/subpart-B/section-95.563>), > but GMRS seems only to specify the frequencies and bandwidth which may be > used via Part 95E §95.1763 "GMRS Channels" (link > <https://www.ecfr.gov/current/title-47/chapter-I/subchapter-D/part-95/subpart-E/section-95.1763>). > It's entirely possible that I've missed the clause requiring this mapping, > and I am not a lawyer, so apologies if I've overlooked it. > > When I am programming a GMRS radio, I don't always want what my family > refers to as our "channel 1" to be 462.5625. Likewise I may want to set up > different repeaters that may use the same frequencies, but different tones > (especially on radios where I cannot edit the tone from the radio itself) > I am able to program the RB26 to accept an alternate GMRS-legal frequency > with a little trickery, so there does not seem to be a firmware restriction > enforcing this and it hasn't bricked my radio (yet). > > Would it be possible for CHIRP to accept GMRS-legal frequencies in any > channel slot, and not require the FRS channel-frequency mapping? > > Thank you, > Chris Romp > >
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