§ 74.795   Digital low power TV and TV translator transmission system
facilities.

   (a) A digital low power TV or TV translator station shall operate with
   a transmitter that is either certificated for licensing based on the
   following provisions or has been modified for digital operation
   pursuant to § 74.796.

   (b) The following requirements must be met before digital low power TV
   and TV translator transmitter will be certificated by the FCC:

   (1) The transmitter shall be designed to produce digital television
   signals that can be satisfactorily viewed on consumer receiving
   equipment based on the digital broadcast television transmission
   standard in § 73.682(d) of this chapter;

   (2) Emissions on frequencies outside the authorized channel, measured
   at the output terminals of the transmitter (including any filters that
   may be employed), shall meet the requirements of § 74.794, as
   applicable;

   (3) The transmitter shall be equipped to display the digital power
   output (i.e., average power over a 6 MHz channel) and shall be designed
   to prevent the power output from exceeding the maximum rated power
   output under any condition;

   (4) When subjected to variations in ambient temperature between 0 and
   40 degrees Centigrade and variations in power main voltage between 85%
   and 115% of the rated power supply voltage, the frequency stability of
   the local oscillator in the RF channel upconverter shall be maintained
   within 10 kHz of the nominal value; and

   (5) The transmitter shall be equipped with suitable meters and jacks so
   that appropriate voltage and current measurements may be made while the
   transmitter is in operation.

   (c) The following additional requirements apply to digital heterodyne
   translators:

   (1) The maximum rated power output (digital average power over a 6 MHz
   channel) shall not exceed 30 watts for transmitters operating on
   channels 14-69 and 3 watts for transmitters operating on channels 2-13;
   and

   (2) The transmitter shall contain circuits which will maintain the
   digital average power output constant within 1 dB when the strength of
   the input signal is varied over a range of 30 dB.

   (d) Certification will be granted only upon a satisfactory showing that
   the transmitter is capable of meeting the requirements of paragraph (b)
   of this section, pursuant to the procedures described in § 74.750(e).

   [ 69 FR 69336 , Nov. 29, 2004]

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