---
kind: "section"
citation: "47 C.F.R. § 73.1545"
title: "47"
number: "73.1545"
heading: "Carrier frequency departure tolerances."
url: "https://uscodex.org/cfr/47/73.1545"
---

# §73.1545. Carrier frequency departure tolerances.

- (a) **AM stations.** The departure of the carrier frequency for monophonic transmissions or center frequency for stereophonic transmissions may not exceed ±20 Hz from the assigned frequency.
- (b) **FM stations.**
  - (1) The departure of the carrier or center frequency of an FM station with an authorized transmitter output power more than 10 watts may not exceed ±2000 Hz from the assigned frequency.
  - (2) The departure of the carrier or center frequency of an FM station with an authorized transmitter output power of 10 watts or less may not exceed ±3000 Hz from the assigned frequency.
- (c) [Reserved]
- (d) **International broadcast stations.** The departure of the carrier frequency of an International broadcast station may not exceed 0.0015% of the assigned frequency on which the station is transmitting.

## Notes

### Amendments

[44 FR 58734, Oct. 11, 1979; 44 FR 64408, Nov. 7, 1979, as amended at 47 FR 13165, Mar. 29, 1982; 65 FR 30004, May 10, 2000; 67 FR 21691, May 1, 2001; 89 FR 7255, Feb. 1, 2024]

### Authority

Authority: 47 U.S.C. 154, 155, 301, 303, 307, 309, 310, 334, 336, 339.

### Amendments

[44 FR 58734, Oct. 11, 1979; 44 FR 64408, Nov. 7, 1979, as amended at 47 FR 13165, Mar. 29, 1982; 65 FR 30004, May 10, 2000; 67 FR 21691, May 1, 2001; 89 FR 7255, Feb. 1, 2024]