Goto Section: 73.1800 | 73.1835 | Table of Contents
Revised as of September 1, 2021
Goto Year:2020 |
§ 73.1820 Station log.
(a) Entries must be made in the station log either manually by a person
designated by the licensee who is in actual charge of the transmitting
apparatus, or by automatic devices meeting the requirements of
paragraph (b) of this section. Indications of operating parameters that
are required to be logged must be logged prior to any adjustment of the
equipment. Where adjustments are made to restore parameters to their
proper operating values, the corrected indications must be logged and
accompanied, if any parameter deviation was beyond a prescribed
tolerance, by a notation describing the nature of the corrective
action. Indications of all parameters whose values are affected by the
modulation of the carrier must be read without modulation. The actual
time of observation must be included in each log entry. The following
information must be entered:
(1) All stations. (i) Entries required by § 17.49 of this chapter
concerning any observed or otherwise known extinguishment or improper
functioning of a tower light:
(A) The nature of such extinguishment or improper functioning.
(B) The date and time the extinguishment or improper operation was
observed or otherwise noted.
(C) The date, time and nature of adjustments, repairs or replacements
(ii) Any entries not specifically required in this section, but
required by the instrument of authorization or elsewhere in this part.
(iii) An entry of each test and activation of the Emergency Alert
System (EAS) pursuant to the requirement of part 11 of this chapter and
the EAS Operating Handbook. Stations may keep EAS data in a special EAS
log which shall be maintained at a convenient location; however, this
log is considered a part of the station log.
(2) Directional AM stations without an FCC-approved antenna sampling
system (See § 73.68). (i) An entry at the beginning of operations in
each mode of operation, and thereafter at intervals not exceeding 3
hours, of the following (actual readings observed prior to making any
adjustments to the equipment and an indication of any corrections to
restore parameters to normal operating values):
(A) Common point current.
(B) When the operating power is determined by the indirect method, the
efficiency factor F and either the product of the final amplifier input
voltage and current or the calculated antenna input power. See
(C) Antenna monitor phase or phase deviation indications.
(D) Antenna monitor sample currents, current ratios, or ratio deviation
(ii) Entries required by § 73.61 performed in accordance with the
schedule specified therein.
(iii) Entries of the results of calibration of automatic logging
devices (see paragraph (b) of this section) or indicating instruments
(see § 73.67), whenever performed.
(b) Automatic devices accurately calibrated and with appropriate time,
date and circuit functions may be utilized to record entries in the
station log Provided:
(1) The recording devices do not affect the operation of circuits or
accuracy of indicating instruments of the equipment being recorded;
(2) The recording devices have an accuracy equivalent to the accuracy
of the indicating instruments;
(3) The calibration is checked against the original indicators as often
as necessary to ensure recording accuracy;
(4) In the event of failure or malfunctioning of the automatic
equipment, the person designated by the licensee as being responsible
for the log small make the required entries in the log manually at that
(5) The indicating equipment conforms to the requirements of § 73.1215
(Indicating instruments—specifications) except that the scales need not
exceed 5 cm (2 inches) in length. Arbitrary scales may not be used.
(c) In preparing the station log, original data may be recorded in
rough form and later transcribed into the log.
[ 43 FR 45854 , Oct. 4, 1978, as amended at 44 FR 58735 , Oct. 11, 1979;
47 FR 24580 , June 7, 1982; 48 FR 38481 , Aug. 24, 1983; 48 FR 44806 ,
Sept. 30, 1983; 49 FR 33603 , Aug. 23, 1984; 58 FR 44951 , Aug. 25, 1993;
59 FR 67102 , Dec. 28, 1994; 60 FR 55482 , Nov. 1, 1995]
Goto Section: 73.1800 | 73.1835
Goto Year: 2020 |
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