Sec. 73.157  Antenna testing during daytime.

    (a) The licensee of a station using a directional antenna during 
daytime or nighttime hours may, without further authority, operate 
during daytime hours with the licensed nighttime directional facilities 
or with a nondirectional antenna when conducting monitoring point field 
strength measurements or antenna proof of performance measurements.
    (b) Operation pursuant to this section is subject to the following 
conditions:
    (1) No harmful interference will be caused to any other station.
    (2) The FCC may notify the licensee to modify or cease such 
operation to resolve interference complaints or when such action may 
appear to be in the public interest, convenience and necessity.
    (3) Such operation shall be undertaken only for the purpose of 
taking monitoring point field strength measurements or antenna proof of 
performance measurements, and shall be restricted to the minimum time 
required to accomplish the measurements.
    (4) Operating power in the nondirectional mode shall be adjusted to 
the same power as was utilized for the most recent nondirectional proof 
of performance covering the licensed facilities.

[ 50 FR 30947 , July 31, 1985]