MURS
Multi-Use Radio Service (MURS) is an unlicensed two-way radio service similar to Citizens Band (CB). These radios may have a maximum legal output of 2 watts. The highest point of any MURS antenna must not be more than 18.3 meters (60 feet) above the ground or 6.10 meters (20.0 feet) above the highest point of the structure to which it is mounted, whichever is higher. It is short distance voice and data service for use by the general public for personal and business communications.
- FCC License: No
- Max Output: 2 watts
- Frequency: 2 meter
MURS comprises the following five frequencies:
Channel Frequency Bandwidth Channel Name 1 151.820 MHz 11.25 kHz N/A 2 151.880 MHz 11.25 kHz N/A 3 151.940 MHz 11.25 kHz N/A 4 154.570 MHz 20.00 kHz Blue Dot (used by many businesses) 5 154.600 MHz 20.00 kHz Green Dot (used by many businesses)
MURS range will vary depending on antenna size and placement. With an external antenna, ranges of 10 miles or more can be expected.
The two channels in the 154Mhz range can be operated in wide band 25khz while the first three are restricted to narrow band 12.5khz only.
Digital voice modulation like MotoTRBO and P25 can be used legally on the MURS frequencies provided their emission bandwidth is less than or equal to the 11.25 kHz (for the 151 MHz frequencies) or the 20 kHz (for the 154 MHz frequencies) bandwidth restrictions. Repeaters are not allowed on the MURS frequencies.
The 154 MHz frequencies were moved from the Business Radio Service (Part 90 of the FCC rules) and stations previously licensed to use these frequencies with higher power levels are considered grandfathered users and may legally transmit high power transmissions. Only the Blue Dot (154.57 MHz) and Green Dot (154.6 MHz) channels are license free and part of MURS. The other color dot frequencies require FCC Part 90 Business Radio licenses to operate on. You must have a license to use 151.625 MHz, 151.955 MHz, 467.925 MHz, 467.850 MHz, 467.7625 MHz, 464.500 MHz and 464.550 MHz.
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