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FRS radios use narrow-band frequency modulation (NBFM) with a maximum deviation of 2.5 kilohertz. The channels are spaced at 12.5 kilohertz intervals. All 22 channels are shared with GMRS radios. Initially, the FRS radios were limited to 500 milliwatts across all channels. However, after May 18, 2017, the limit is increased to 2 watts on ...
Channel spacing is 25 kHz for GMRS and so a 20 kHz bandwidth fits into that channel with protection on each side. FRS channels are spaced within a 12.5 kHz space directly between two GMRS channels. FRS radios generally utilize an 11 kHz transmitter bandwidth and a power lower than GMRS so the interference to an adjacent GMRS channel is minimized.
GMRS and FRS Radio Frequency and Power Limitations. Items portrayed in this file ... Correction to GMRS power level 462 MHz interstitial (2 to 5 watts) 22:01, 24 ...
FRS/GMRS and PMR446 radios are not approved for use in China. FRS band radios may be found in use in China illegally, starting before the Chinese government opened the 409 MHz band to the public. Legal action against such usage is rare, because of the low power and short range of FRS radios. List of China Public Radio Service Channels:
It can have a repeater input frequency of 467.675 MHz, and a tone squelch of 141.3 Hz. After FCC deregulation of simplex FRS/GMRS radios, FRS users may transmit up to 2 watts on the GMRS emergency channel 20 (462.675 MHz) with 141.3 Hz CTCSS, or channel 20-22. MURS: 151.940 MHz (only available in the United States)
GMRS/FRS radios offering CTCSS codes typically provide a choice of 38 tones, but the tone number and the tone frequencies used may vary from one manufacturer to another (or even within product lines of one manufacturer) and should not be assumed to be consistent (i.e. "Tone 12" in one set of radios may not be "Tone 12" in another). [11]
Retevis RT87 handheld radios. Retevis is the brand of chinese based company Shenzhen Retevis Technology Co., Ltd. headquartered in Shenzhen,China. [40] UHF/VHF radios: Retevis RA89 (7 Watt) Retevis RA685 (5 Watt) Retevis RT87 (5 Watt IP 66) Retevis RT95 (20 Watt mobile radio) Retevis RT3S (5 Watt DMR)
Tables of commonly used frequencies for emergencies and disasters; Aviation, MURS, GMRS, FRS, CB, railroad, SAR and marine frequencies; Amateur emergency, calling and repeater frequencies; GETS and Satellite Phone dialing instructions; It also includes an organized listing of the national mutual aid channels and other reference material.