Below are some of the technical specifications for the MURS frequencies
from the FCC web site. Notice that the bandwidths of the first three
frequencies are different than the last two. Not all radios are capable of
these
bandwidths.
Bandwidth
The frequencies available in the Multi-Use Radio Service are:
Frequencies Authorized Bandwidth 151.820 MHz 11.25 KHz 151.880 MHz 11.25
KHz 151.940 MHz 11.25 KHz 154.570 MHz 20.0 KHz 154.600 MHz 20.0 KHz
Emissions
A MURS transmitter must transmit only emission types A1D, A2B, A2D, A3E,
F2B, F1D, F2D, F3E, G3E. Emission types A3E, F3E and G3E include selective
calling or tone-operated squelch tones to establish or continue voice
communications. MURS transmitters are prohibited from transmitting in the
continuous carrier mode. The authorized bandwidth for any emission type
transmitted by a MURS transmitter is specified as follows:
* ALL A3E emissions are limited to 8 kHz.
* Emissions other than A3E on frequencies 151.820 MHz, 151.880 MHz,
and 151.940 MHz are limited to 11.25 kHz.
* Emissions other than A3E on frequencies 154.570 and 154.600 MHz are
limited to 20.0 kHz.
* MURS transmitters shall be designed to comply with the emission
masks described in _47 CFR 95.635_ (http://wireless.fcc.gov/rules.html) .
