47 CFR 24.135 - Frequency stability.

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§ 24.135 Frequency stability.
(a) The frequency stability of the transmitter shall be maintained within ±0.0001 percent (±1 ppm) of the center frequency over a temperature variation of −30 °Celsius to 50 °Celsius at normal supply voltage, and over a variation in the primary supply voltage of 85 percent to 115 percent of the rated supply voltage at a temperature of 20 °Celsius.
(b) For battery operated equipment, the equipment tests shall be performed using a new battery without any further requirement to vary supply voltage.
(c) It is acceptable for a transmitter to meet this frequency stability requirement over a narrower temperature range provided the transmitter ceases to function before it exceeds these frequency stability limits.

Title 47 published on 2013-10-01

no entries appear in the Federal Register after this date.

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United States Code

Title 47 published on 2013-10-01

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 47 CFR 24 after this date.

  • 2014-03-17; vol. 79 # 51 - Monday, March 17, 2014
    1. 79 FR 14634 - Expanding Access to Mobile Wireless Services Onboard Aircraft
      GPO FDSys XML | Text
      Proposed rule; extension of comment period.
      The reply comment period for the proposed rule published January 15, 2014 (79 FR 2615), is extended. Submit reply comments on or before May 16, 2014.
      47 CFR parts 22, 24, 27, 87 and 90