Thanks, Jim, for that info. I've reached out to Retevis to see if they have any input. Would it basically be a requirement for CHIRP to support assigning any GMRS frequency to any channel for Retevis to change their OEM software, even if the radio supports it?
Thanks again, Chris > On Mon, Feb 21, 2022 at 6:08 PM Chris Romp <[email protected]> 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), but GMRS seems only to specify the frequencies and > > bandwidth which may be used via Part 95E ?95.1763 "GMRS Channels" (link). > > 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 > > The BTECH GMRS-V1 channel assignments are in firmware. Even if CHIRP > would let you put in different frequencies, it wouldn't make any > difference. Channel 1 will always be 465.5625 MHz. > > The Retevis models are programmed to match how the OEM software > behaves. Some of the newer Retevis models let you program the GMRS > frequencies in the radio however you please. > > Jim KC9HI _______________________________________________ chirp_users mailing list [email protected] http://intrepid.danplanet.com/mailman/listinfo/chirp_users This message was sent to [email protected] at [email protected] To unsubscribe, send an email to [email protected] To report this email as off-topic, please email [email protected]
