78.111—Frequency tolerance.
Stations in this service shall maintain the carrier frequency of each authorized transmitter to within the following percentage of the assigned frequency.
| Frequency band (MHz) | Frequency tolerance | |
|---|---|---|
| Fixed (percent) | Mobile (percent) | |
| 1,990 to 2,110 | 0.005 | |
| 6,425 to 6,525 | 0.005 | |
| 6,875 to 7,125 | 0.005 | |
| 12,700 to 13,250 1 | 0.005 | 0.005 |
| 17,700 to 18,820 | 0.003 | |
| 18,820 to 18,920 | 0.001 | |
| 18,920 to 19,700 | 0.003 | |
| 1 Stations that employing vestigal sideband AM transmissions shall maintain their operating frequency within 0.0005% the visual carrier, and the aural carrier shall be 4.5 MHz ±1 kHz above the visual carrier frequency. | ||
[52 FR 7145, Mar. 9, 1987, as amended at 68 FR 12776, Mar. 17, 2003]