Sec. 73.691  Visual modulation monitoring.

    (a) Each TV station must have measuring equipment for determining 
that the transmitted visual signal conforms to the provisions of this 
subpart. The licensee shall decide the monitoring and measurement 
methods or procedures for indicating and controlling the visual signal.
    (b) In the event technical problems make it impossible to operate in 
accordance with the timing and carrier level tolerance requirements of 
Sec. 73.682 (a)(9)(i), (a)(9)(ii), (a)(12), (a)(13), and (a)(17), a TV 
broadcast station may operate at variance for a period of not more than 
30 days without specific authority from the FCC: provided that, the date 
and time of the initial out-of-tolerance condition has been entered in 
the station log. If the operation at variance will exceed 10 consecutive 
days, a notification must be sent to the FCC in Washington, D.C., not 
later than the 10th day of such operation. In the event normal operation 
is resumed prior to the end of the 30 day period, the licensee must 
notify the FCC upon restoration of normal operation. If causes beyond 
the control of the licensee prevent restoration of normal operation 
within 30 days, a written request must be made to the FCC in Washington, 
D.C., no later than the 30th day for such additional time as may be 
necessary.

[ 60 FR 55480 , Nov. 1, 1995]