$$Channel Frequency = Base Frequency + (Channel Number - 1) x Channel Spacing$$
Where:
* Base Frequency = 462.550 MHz
* Channel Number = 1 to 22
* Channel Spacing = 0.500 MHz
Here is a table of the center frequencies for each FRS channel:
| Channel | Frequency (MHz) |
|---|---|
| 1 | 462.550 |
| 2 | 462.575 |
| 3 | 462.600 |
| 4 | 462.625 |
| 5 | 462.650 |
| 6 | 462.675 |
| 7 | 462.700 |
| 8 | 462.725 |
| 9 | 467.550 |
| 10 | 467.575 |
| 11 | 467.600 |
| 12 | 467.625 |
| 13 | 467.650 |
| 14 | 467.675 |
| 15 | 467.700 |
| 16 | 467.725 |
| 21 | Private Talk 2 |
| 22 | Private Talk 1 |
In addition to the center frequencies, FRS radios also use sub-audible tones, known as CTCSS (Continuous Tone-Coded Squelch System), to selectively mute background noise. There are 38 different CTCSS tones that can be used with FRS radios, ranging from 67.0 Hz to 250.3 Hz.
It's important to note that FRS radios are subject to the regulations set by the Federal Communications Commission (FCC) in the United States and Industry Canada in Canada. These regulations include limits on the power output, antenna height, and other technical specifications. It is essential to comply with these regulations to ensure lawful and safe operation of FRS radios.