Sec. 73.258  Indicating instruments.

    (a) Each FM broadcast station shall be equipped with indicating 
instruments which conform with the specifications described in 
Sec. 73.1215 for determining power by the indirect method; for 
indicating the relative amplitude of the transmission line radio 
frequency current, voltage, or power; and with such other instruments as 
are necessary for the proper adjustment, operation, and maintenance of 
the transmitting system.
    (b) The function of each instrument shall be clearly and permanently 
shown in the instrument itself or on the panel immediately adjacent 
thereto.
    (c) In the event that any one of these indicating instruments 
becomes defective when no substitute which conforms with the required 
specifications is available, the station may be operated without the 
defective instrument pending its repair or replacement for a period not 
in excess of 60 days without further authority of the FCC: Provided 
that, if the defective instrument is the transmission line meter of a 
station which determines the output power by the direct method, the 
operating power shall be determined by the indirect method in accordance 
with Sec. 73.267(c) during the entire time the station is operated 
without the transmission line meter.
    (d) If conditions beyond the control of the licensee prevent the 
restoration of the meter to service within the above allowed period, 
informal request in accordance with Sec. 73.3549 may be filed with the 
Engineer in Charge of the radio district in which the station is located 
for such additional time as may be required to complete repairs of the 
defective instrument.

[ 41 FR 36818 , Sept. 1, 1976, as amended at  48 FR 44805 , Sept. 30, 1983; 
 50 FR 32416 , Aug. 12, 1985]