Part 95 defines technical standards for Personal Radio Services, including Family Radio Service (FRS), Citizen Band (CB), General Mobile Radio Service (GMRS), and Multi-Use Radio Service (MURS). The regulation sets maximum power levels (e.g., 2 watts for FRS), antenna restrictions, and emission limits to control interference and ensure safe operation. 

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Part 95 specifies technical requirements to control interference, manage power levels, and ensure the safe operation of Personal Radio Services. Each service has specific parameters for RF engineers to consider:

Family Radio Service (FRS):

As per 47 CFR § 95.501–95.578, FRS operates in the 462 and 467 MHz bands with a power limit of up to 2 watts, using FM modulation. FRS radios must comply with a maximum ERP (Effective Radiated Power) of 2 watts, and external antennas are not permitted, which restricts range.

Citizen Band (CB) Radio:

Under 47 CFR § 95.901–95.983, CB radios, which are not the same as CBRS (Citizens Broadband Radio Service) devices, operate in the 27 MHz band with a maximum power output of 4 watts (AM) or 12 watts (SSB). CB radios cannot use external linear amplifiers, and there are strict modulation and bandwidth requirements.

General Mobile Radio Service (GMRS):

According to 47 CFR § 95.1701–95.1787, GMRS operates on frequencies between 462 and 467 MHz, with power limits of up to 50 watts for base and repeater stations and 5 watts for handheld devices. GMRS allows for external antennas, providing extended range, and may be used with repeaters. 

Multi-Use Radio Service (MURS):

Defined in 47 CFR § 95.2701–95.2789, MURS operates in the 151 and 154 MHz bands with a power limit of 2 watts ERP. MURS limits antenna height to 60 feet above ground or 20 feet above a structure, whichever is higher.