---
kind: "section"
citation: "47 C.F.R. § 78.113"
title: "47"
number: "78.113"
heading: "Frequency monitors and measurements."
url: "https://uscodex.org/cfr/47/78.113"
---

# §78.113. Frequency monitors and measurements.

- (a) The licensee of each CARS station shall employ a suitable procedure to determine that the carrier frequency of each transmitter is maintained within the tolerance prescribed in [§ 78.111](/cfr/47/78.111.md) at all times. The determination shall be made, and the results thereof entered in the station records: when a transmitter is initially installed; when any change is made in a transmitter which may affect the carrier frequency or the stability thereof; or in any case at intervals not exceeding one year.
- (b) **The choice of apparatus to measure the operating frequency is left to the discretion of the licensee.** However, failure of the apparatus to detect departures of the operating frequency in excess of the prescribed tolerance will not be deemed an acceptable excuse for the violation.

## Notes

### Amendments

[37 FR 3292, Feb. 12, 1972, as amended at 41 FR 29696, July 19, 1976; 50 FR 23422, June 4, 1985]

### Authority

Authority: 47 U.S.C. 152, 153, 154, 301, 303, 307, 308, 309.

### Source

Source: 37 FR 3292, Feb. 12, 1972, unless otherwise noted.

### Amendments

[37 FR 3292, Feb. 12, 1972, as amended at 41 FR 29696, July 19, 1976; 50 FR 23422, June 4, 1985]