Goto Section: 74.801 | 74.803 | Table of Contents
Revised as of October 22, 2020
Goto Year:2020 |
§ 74.802 Frequency assignment.
(a)(1) Frequencies within the following bands may be assigned for use
by low power auxiliary stations:
161.625-161.775 MHz (except in Puerto Rico or the Virgin Islands)
488.000-494.000 MHz (except Hawaii)
Note to paragraph (a)(1): Frequency assignments in the 614.000-698.000
MHz band are subject to conditions established in proceedings pursuant
to GN Docket No. 12-268. This band is being transitioned to the 600 MHz
service band, the 600 MHz guard band, and the 600 MHz duplex gap during
the post-incentive auction transition period (as defined in § 27.4 of
this chapter), which began on April 13, 2017. Low power auxiliary
stations must comply with the applicable conditions with respect to any
assignment to operate on frequencies repurposed for the 600 MHz service
band, the 600 MHz guard band, and the 600 MHz duplex gap, respectively.
This rule will be further updated, pursuant to public notice or
subsequent Commission action, to reflect additional changes that
implement the determinations made in these proceedings.
(2) The 653.000-657.000 MHz segment of the 600 MHz duplex gap may be
assigned for use by low power auxiliary service.
Note to paragraph (a)(2): The specific frequencies for the 600 MHz
duplex gap will be determined in light of further proceedings pursuant
to GN Docket No. 12-268 and the rule will be updated accordingly
pursuant to a future public notice.
(b)(1) Operations in the bands allocated for TV broadcasting are
limited to locations at least 4 kilometers outside the protected
contours of co-channel TV stations shown in the following table. These
contours are calculated using the methodology in § 73.684 of this
chapter and the R-6602 curves contained in § 73.699 of this chapter.
Type of station Protected contour
(dBu) Propagation curve
Analog: Class A TV, LPTV,
translator and booster Low VHF (2-6) 47 F(50,50)
High VHF (7-13) 56 F(50,50)
UHF (14-51) 64 F(50,50)
Digital: Full service TV, Class A TV, LPTV, translator and booster Low
VHF (2-6) 28 F(50,90)
High VHF (7-13) 36 F(50,90)
UHF (14-51) 41 F(50,90)
(2) Low power auxiliary stations may operate closer to co-channel TV
broadcast stations than the distances specified in paragraph (b)(1) of
this section provided that such operations either—
(i) Are coordinated with TV broadcast stations that could be affected
by the low power auxiliary station operation, and coordination is
completed prior to operation of the low power auxiliary station; or
(ii) Are limited to an indoor location that is not being used for
over-the-air television viewing, and the following conditions are met
with respect to the TV channel used: The TV signal falls below a
threshold of −84 dBm over the entire channel; the signal is scanned
across the full 6 megahertz channel where the wireless microphones
would be operated; and to the extent that directional antennas are
used, they are rotated to the place of maximum signal.
(c) Specific frequency operation is required when operating within the
600 MHz duplex gap or the bands allocated for TV broadcasting.
(1) The frequency selection shall be offset from the upper or lower
band limits by 25 kHz or an integral multiple thereof.
(2) One or more adjacent 25 kHz segments within the assignable
frequencies may be combined to form a channel whose maximum bandwidth
shall not exceed 200 kHz.
(d) Low power auxiliary licensees will not be granted exclusive
(e) Clearing mechanisms for the 700 MHz Band. This section sets forth
provisions relating to the transition of low power auxiliary stations
operating at 698-806 MHz (700 MHz band).
(1) Any low power auxiliary station that operates at frequencies in the
700 MHz band while transitioning its operations out of that band must
not cause harmful interference and must accept interference from any
commercial or public safety wireless licensees in the 700 MHz band.
(2) Any low power auxiliary station that operates at frequencies in the
700 MHz band will have until no later than June 12, 2010 to transition
its operations completely out of the 700 MHz band, subject to the
following. During this transition period, any commercial or public
safety licensee in the 700 MHz band may choose one or both of the
following voluntary methods to notify low power auxiliary stations:
(i) Any commercial or public safety licensee in the 700 MHz band may
notify the Commission that it has initiated or will be initiating
operations on specified frequencies in a particular market(s) in the
700 MHz band. The wireless operations initiated by the commercial or
public safety 700 MHz licensees may include system testing or trials.
Following receipt of the notification, the Commission will issue a
public notice providing that operators of low power auxiliary stations,
including wireless microphones, in the 700 MHz band in those market(s)
will be required to cease operations within 60 days after the
Commission's notice is released.
(ii) Any commercial or public safety licensee in the 700 MHz band may
notify any low power auxiliary station users operating in the 700 MHz
band that it has initiated or will be initiating operations on
specified frequencies in the market in which the low power auxiliary
station is operating. The wireless operations initiated by the
commercial or public safety 700 MHz licensees may include system
testing or trials. Upon receipt of such notice, the low power auxiliary
station in the affected market area must cease operation within 60
(iii) In the event that both of these notice provisions in paragraphs
(e)(2)(i) and (ii) of this section are used with respect to a
particular low power auxiliary station, the low power auxiliary station
will have to cease operations in the market(s) in accordance with
whichever notice provides for earlier termination of its operations.
(3) Notwithstanding this 60 day notice requirement, any low power
auxiliary station that causes harmful interference to any commercial or
public safety 700 MHz licensee must cease operations immediately,
consistent with the rules for secondary use.
(f) Operations in 600 MHz band assigned to wireless licensees under
part 27 of this chapter. Alow power auxiliary station that operates on
frequencies in the 600 MHz band assigned to wireless licensees under
part 27 of this chapter must cease operations on those frequencies no
later than the end of the post-auction transition period, as defined in
§ 27.4 of this chapter. During the post-auction transition period, low
power auxiliary stations will operate on a secondary basis to licensees
of part 27 of this chapter, i.e., they must not cause to and must
accept harmful interference from these licensees, and must comply with
the distance separations in § 15.236(e)(2) of this chapter from the
areas specified in § 15.713(j)(10) of this chapter in which a licensee
has commenced operations, as defined in § 27.4 of this chapter.
[ 52 FR 2535 , Jan. 23, 1987, as amended at 68 FR 12772 , Mar. 17, 2003;
75 FR 3638 , Jan. 22, 2010; 79 FR 48545 , Aug. 15, 2014; 80 FR 71728 ,
Nov. 17, 2015; 80 FR 73085 , Nov. 23, 2015; 81 FR 4975 , Jan. 29, 2016;
82 FR 41560 , Sept. 1, 2017]
Goto Section: 74.801 | 74.803
Goto Year: 2020 |
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