Goto Section: 73.612 | 73.614 | Table of Contents
FCC 73.613
Revised as of October 2, 2015
Goto Year:2014 |
2016
§ 73.613 Protection of Class A TV stations.
(a) An application for a new TV broadcast station or for changes in the
operating facilities of an existing TV broadcast station will not be
accepted for filing if it fails to comply with the requirements specified in
this section.
Note to § 73.613(a): Licensees and permittees of TV broadcast stations that
were authorized on November 29, 1999 (and applicants for new TV stations
that had been cut-off without competing applications or that were the
winning bidder in a TV broadcast station auction as of that date, or that
were the proposed remaining applicant in a group of mutually exclusive
applications for which a settlement agreement was on file as of that date)
may continue to operate with facilities that do not protect Class A TV
stations. Applications filed on or before November 29, 1999 for a change in
the operating facilities of such stations also are not required to protect
Class A TV stations under the provisions of this section.
(b) Due to the frequency spacing which exists between TV channels 4 and 5,
between channels 6 and 7, and between channels 13 and 14, first-adjacent
channel protection standards shall not be applicable to these pairs of
channels. Some interference protection requirements of this section only
apply to stations transmitting on the UHF TV channels 14 through 51 (See
§ 73.603(a) of this part).
(c) A UHF TV broadcast station application will not be accepted if it
specifies a site less than 100 kilometers from the transmitter site of a UHF
Class A TV station operating on a channel which is the seventh channel above
the requested channel. Compliance with this requirement shall be determined
based on a distance computation rounded to the nearest kilometer.
(d) A UHF TV broadcast station application will not be accepted if it
specifies a site less than 32 kilometers from the transmitter site of a UHF
Class A TV station that is authorized an effective radiated power of more
than 50 kilowatts and operating on a channel which is the second, third, or
fourth channel above or below the requested channel. Compliance with this
requirement shall be determined based on a distance computation rounded to
the nearest kilometer.
(e) In cases where a TV broadcast station has been authorized facilities
that do not meet the distance separation requirements of this section, an
application to modify such a station's facilities will not be accepted if it
decreases that separation.
(f) New interference must not be caused to Class A TV stations authorized
pursuant to Subpart J of this part, within the protected contour defined in
§ 73.6010 of this part. For this prediction, the TV broadcast station field
strength is calculated from the proposed effective radiated power and the
antenna height above average terrain in pertinent directions using the
methods in § 73.684 of this part.
(1) For co-channel protection, the field strength is calculated using the
appropriate F(50,10) chart from Figure 9a, 10a, or 10c of § 73.699 of this
part.
(2) For TV broadcast stations that do not specify the same channel as the
Class A TV station to be protected, the field strength is calculated using
the appropriate F(50,50) chart from Figure 9, 10, or 10b of § 73.699 of this
part.
(g) A TV broadcast station application will not be accepted if the ratio in
dB of its field strength to that of the Class A TV station at the Class A TV
station's protected contour fails to meet the following:
(1) −45 dB for co-channel operations where the Class A TV station does not
specify an offset carrier frequency or where the TV broadcast and Class A TV
stations do not specify different offset carrier frequencies (zero, plus or
minus) or −28 dB for offset carrier frequency operation where the TV
broadcast and Class A TV stations specify different offset carrier
frequencies.
(2) 6 dB when the protected Class A TV station operates on a VHF channel
that is one channel above the requested channel.
(3) 12 dB when the protected Class A TV station operates on a VHF channel
that is one channel below the requested channel.
(4) 15 dB when the protected Class A TV station operates on a UHF channel
that is one channel above or below the requested channel.
(5) 23 dB when the protected Class A TV station operates on a UHF channel
that is fourteen channels below the requested channel.
(6) 6 dB when the protected Class A TV station operates on a UHF channel
that is fifteen channels below the requested channel.
(h) New interference must not be caused to digital Class A TV stations
authorized pursuant to Subpart J of this part, within the protected contour
defined in § 73.6010 of this part. A TV broadcast station application will
not be accepted if the ratio in dB of the field strength of the digital
Class A TV station at the digital Class A TV station's protected contour to
the field strength resulting from the facilities proposed in the TV
broadcast station application fails to meet the D/U signal ratios for
“analog TV-into-DTV” specified in § § 73.623(c)(2) and 73.623(c)(3) of this
part. For digital Class A TV station protection, the TV broadcast station
field strength is calculated from the proposed effective radiated power and
the antenna height above average terrain in pertinent directions using the
methods in § 73.684 of this part and using the appropriate F(50,10) chart
from Figure 9a, 10a, or 10c of § 73.699 of this part.
(i) In cases where a TV broadcast station has been authorized facilities
that do not meet the interference protection requirements of this section,
an application to modify such a station's facilities will not be accepted if
it is predicted to cause new interference within the protected contour of
the Class A TV or digital Class A TV station.
(j) In support of a request for waiver of the interference protection
requirements of this section, an applicant for a TV broadcast station may
make full use of terrain shielding and Longley-Rice terrain dependent
propagation methods to demonstrate that the proposed facility would not be
likely to cause interference to Class A TV stations. Guidance on using the
Longely-Rice methodology is provided in OET Bulletin No. 69, which is
available through the Internet at
http://www.fcc.gov/oet/info/documents/bulletins/#69.
[ 65 FR 3001 , May 10, 2000]
return arrow Back to Top
Goto Section: 73.612 | 73.614
Goto Year: 2014 |
2016
CiteFind - See documents on FCC website that
cite this rule
Want to support this service?
Thanks!
Report errors in
this rule. Since these rules are converted to HTML by machine, it's possible errors have been made. Please
help us improve these rules by clicking the Report FCC Rule Errors link to report an error.
hallikainen.com
Helping make public information public