§  5.211   Frequency monitors and measurements.

   The licensee of a broadcast experimental radio station shall provide
   the necessary means for determining that the frequency of the station
   is within the allowed tolerance. The date and time of each frequency
   check, the frequency as measured, and a description or identification
   of the method employed shall be entered in the station log. Sufficient
   observations shall be made to insure that the assigned carrier
   frequency is maintained within the prescribed tolerance.