Goto Section: 21.937 | 21.939
FCC 21.938
Revised as of January 7, 2005
Goto Year:2004 |
2006
Sec. 21.938 BTA and PSA technical and interference provisions.
(a) BTA or PSA authorization holders are expected to cooperate with
one another by designing their stations in a manner that protects
service in adjoining BTAs and PSAs including consideration of
interference abatement techniques such as cross polarization,
frequency offset, directional antennas, antenna beam tilt, EIRP
decrease, reduction of antenna height, and terrain shielding.
(b) Unless the affected parties have executed a written interference
agreement in accordance with Sec. 21.937, and subject to the provisions of
Sec. Sec. 21.909, 21.913, 21.949, 74.939 of this chapter, 74.949 of this
chapter and 74.985 of this chapter regarding the protection of
response station hubs, booster service areas and 125 kHz channels from
harmful electromagnetic interference, stations licensed to a BTA or
PSA authorization holder must not cause harmful electromagnetic
interference to the following:
(1) The protected service area of other authorization holders in
adjoining BTAs or PSAs.
(2) The 56.33 km (35 mile) protected service areas of authorized or
previously proposed MDS stations (incumbents).
(3) Registered receive sites and protected service areas of authorized
or previously proposed stations in the Instructional Television Fixed
Service pursuant to the manner in which interference is defined in
Sec. 74.903(a).
(c)(1) ITFS applicants may locate a new station in an unused portion
of a BTA or PSA where interference to a previously-proposed or
authorized MDS station of a BTA or PSA authorization holder would not
be predicted.
(2) With respect to ITFS applications only and for purposes of
determining the existence of harmful electromagnetic interference as
caused to MDS stations licensed to BTA or PSA authorization holders by
subsequently proposed ITFS stations within that BTA, MDS stations
licensed to BTA and PSA authorization holders and will have a
protected service area of 56.33 km (35 miles), centered on the antenna
site of the MDS stations.
(3) The 56.33 km (35 mile) protected service area afforded to a
previously-proposed or authorized MDS station of a BTA or PSA
authorization holder with respect to a subsequently proposed ITFS
station is entitled to the interference protection standards of
Sec. 21.902.
(4) An ITFS station authorized before September 15, 1995 may be
modified, provided the power flux density of that station does not
exceed -73 dBW/m 2 (or the appropriate value for bandwidth other than
6 MHz) at locations along the 56.33 km (35 mile) circle centered on
the then-existing transmitting antenna site or service area of a
collocated incumbent MDS station, as applicable.
(d) Unless the affected parties have executed a written interference
agreement in accordance with Sec. 21.937, it shall be the responsibility
of a BTA or PSA authorization holder to correct at its expense any
condition of harmful electromagnetic interference caused to authorized
MDS service at locations within other BTAs or PSAs or within the 56.33
km (35 mile) protected service areas of authorized or previously
proposed ITFS and MDS stations (incumbents), or at authorized or
previously proposed ITFS receive sites.
(e) Unless specifically excepted, BTA or PSA authorization holders are
governed by the interference protection and other technical provisions
applicable to MDS.
(f) The calculated free space power flux density from an MDS station,
other than an incumbent MDS station, may not exceed -73 dBW/m 2 (or
the appropriate value for bandwidth other than 6 MHz) at locations on
BTA or PSA boundaries for which there is an unobstructed signal path
from the transmitting antenna to the boundary, unless the applicant
has obtained the written consent of the authorization holder for the
affected BTA or PSA.
(g)(1) Authorization holders for BTAs or PSAs must notify
authorization holders of adjoining areas of their application filings
for new or modified stations; provided the proposed facility would
produce an unobstructed signal path anywhere within the adjoining BTA
or PSA.
(2) This service of written notification must include a copy of the
FCC application and occur on or before the date the application is
filed with the Commission.
(3) With regard to incumbent MDS stations, authorization holders for
BTAs or PSAs must comply with the requirements of Sec. 21.902.
(h) Where a PSA adjoins a BTA and both authorizations are held by the
same individual or entity, the PSA shall be considered an extension of
the protected service area of the BTA regarding the interference
protection, limiting signal strength, and notification provisions of
this section.
[ 60 FR 36557 , July 17, 1995, as amended at 60 FR 57367 , Nov. 15, 1995;
63 FR 65112 , Nov. 25, 1998; 64 FR 63737 , Nov. 22, 1999]
Goto Section: 21.937 | 21.939
Goto Year: 2004 |
2006
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