Goto Section: 73.68 | 73.72 | Table of Contents
Revised as of September 1, 2021
Goto Year:2020 |
§ 73.69 Antenna monitors.
(a) Each station using a directional antenna must have in operation at
the transmitter site an FCC authorized antenna monitor.
(b) In the event that the antenna monitor sampling system is
temporarily out of service for repair or replacement, the station may
be operated, pending completion of repairs or replacement, for a period
not exceeding 120 days without further authority from the FCC if all
other operating parameters, and the field monitoring point values are
within the limits specified on the station authorization.
(c) If conditions beyond the control of the licensee prevent the
restoration of the monitor to service within the allowed period, an
informal letter request in accordance with § 73.3549 of the Commission's
rules must be filed with the FCC, Attention: Audio Division, Media
Bureau in Washington, DC for such additional time as may be required to
complete repairs of the defective instrument.
(d) If an authorized antenna monitor is replaced by another antenna
monitor, the following procedure shall be followed:
(1) Temporary authority shall be requested and obtained from the
Commission in Washington to operate with parameters at variance with
licensed values, pending issuance of a modified license specifying new
(2) Immediately before the replacement of the antenna monitor, after a
verification that all monitoring point values and the common point
current reading are within the limits or tolerances specified in the
rules, the following indications must be recorded for each radiation
pattern: Final plate current and plate voltage, common point current,
antenna monitor phase and current indications, and the field strength
at each monitoring point.
(3) With the new monitor substituted for the old, all indications
specified in paragraph (d)(2) of this section, again must be read. If
no change has occurred in the indication for any parameter other than
the indications of the antenna monitor, the new antenna monitor
indications must be deemed to be those reflecting correct array
(4) If it cannot be established by the observations required in
paragraph (d)(2) of this section that the common point current reading
and the monitoring point values are within the tolerances or limits
prescribed by the rules and the instrument of authorization, or if the
substitution of the new antenna monitor for the old results in changes
in these parameters, a partial proof of performance shall be executed
and analyzed in accordance with § 73.154.
(5) An informal letter request for modification of license shall be
submitted to the FCC, Attention: Audio Division, Media Bureau in
Washington, DC within 30 days of the date of monitor replacement. Such
request shall specify the make, type, and serial number of the
replacement monitor, phase and sample current indications, and other
data obtained pursuant to this paragraph (d).
(e) The antenna monitor must be calibrated according to the
manufacturer's instructions as often as necessary to ensure its proper
[ 38 FR 1918 , Jan. 19, 1973]
Editorial Note: For Federal Register citations affecting § 73.69, see
the List of CFR Sections Affected, which appears in the Finding Aids
section of the printed volume and at www.govinfo.gov.
Goto Section: 73.68 | 73.72
Goto Year: 2020 |
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