Goto Section: 74.792 | 74.794 | Table of Contents
FCC 74.793
Revised as of October 1, 2011
Goto Year:2010 |
2012
§ 74.793 Digital low power TV and TV translator station protection of
broadcast stations.
(a) An application to construct a new digital low power TV or TV
translator station or change the facilities of an existing station will
not be accepted if it fails to meet the interference protection
requirements in this section.
(b) Except as provided in this section, interference prediction
analysis is based on the interference thresholds (D/U signal strength
ratios) and other criteria and methods specified in § 73.623(c)(2)
through (c)(4) of this chapter. Predictions of interference to
co-channel DTV broadcast, digital Class A TV, digital LPTV and digital
TV translator stations will be based on the interference thresholds
specified therein for "DTV-into-DTV." Predictions of interference to
co-channel TV broadcast, Class A TV, LPTV and TV translator stations
will be based on the interference threshold specified for
"DTV-into-analog TV." Predictions of interference to TV broadcast,
Class A TV, LPTV and TV translator stations with the following channel
relationships to a digital channel will be based on the threshold
values specified for "Other Adjacent Channels (Channels 14-69 only),"
where N is the analog channel: N-2, N+2, N-3, N+3, N-4, N+4, N-7 , N+7,
N-8, N+8, N+14, and N+15.
(c) The following D/U signal strength ratio (db) shall apply to the
protection of stations on the first adjacent channel. The D/U ratios
for "Digital TV-into-analog TV" shall apply to the protection of Class
A TV, LPTV and TV translator stations. The D/U ratios for "Digital
TV-into-digital TV" shall apply to the protection of DTV, digital Class
A TV, digital LPTV and digital TV translator stations. The D/U ratios
correspond to the digital LPTV or TV translator station's specified
out-of-channel emission mask.
Simple mask Stringent mask Full service mask
Digital TV-into-analog TV 10 0 Lower ( -14)/Upper ( -17)
Digital TV-into-digital TV -7 -12 Lower ( -28)/Upper ( -26)
(d) For analysis of predicted interference from digital low power TV
and TV translator stations, the relative field strength values of the
antenna vertical radiation pattern if provided by the applicant will be
used instead of the doubled values in Table 8 in OET Bulletin 69 up to
a value of 1.0.
(e) Protection to the authorized facilities of DTV broadcast stations
shall be based on not causing predicted interference to the population
within the service area defined and described in § 73.622(e) of this
chapter, except that a digital low power TV or TV translator station
must not cause a loss of service to 0.5 percent or more of the
population predicted to receive service from the authorized DTV
facilities.
(f) Protection to the authorized facilities of TV broadcast stations
shall be based on not causing predicted interference to the population
within the Grade B field strength contours defined and described in
§ 73.683 of this chapter, except that a digital low power TV or TV
translator station must not cause a loss of service to 0.5 percent or
more of the population predicted to receive service from the authorized
TV broadcast facilities.
(g) Protection to the authorized facilities of Class A and digital
Class A TV stations shall be based on not causing predicted
interference to the population within the service area defined and
described in § 73.6010 (a) through (d) of this chapter, respectively,
except that a digital low power TV or TV translator station must not
cause a loss of service to 0.5 percent or more of the population
predicted to receive service from the authorized Class A TV or digital
Class A TV facilities.
(h) Protection to the authorized facilities of low power TV and TV
translator stations and digital low power TV and TV translator stations
shall be based on not causing predicted interference to the population
within the service area defined and described in § § 74.707(a) and
74.792, respectively, except that a digital low power TV or TV
translator station must not cause a loss of service to 2.0 percent or
more of the population predicted to receive service from the authorized
low power TV, TV translator, digital low power TV or digital TV
translator station.
[ 69 FR 69335 , Nov. 29, 2004, as amended at 76 FR 44828 , July 27, 2011]
Goto Section: 74.792 | 74.794
Goto Year: 2010 |
2012
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