Goto Section: 74.938 | 74.949
FCC 74.939
Revised as of January 7, 2005
Goto Year:2004 |
2006
Sec. 74.939 ITFS response stations.
(a) An ITFS response station is authorized to provide communication by
voice, video and/or data signals with its associated ITFS response
station hub or associated ITFS station. An ITFS response station may
be operated only by the licensee of the ITFS station, by any person or
entity authorized by the ITFS licensee to receive point-to-multipoint
transmissions over its channels, by any lessee of excess capacity, or
by a subscriber of any lessee of excess capacity. The authorized
channel may be divided to provide distinct subchannels for each of
more than one response station, provided that digital modulation is
employed and the aggregate power does not exceed the authorized power
for the channel. An ITFS response station may also, jointly with other
licensees, transmit utilizing bandwidth in excess of that authorized
to the station, provided that digital modulation is employed, all
power spectral density requirements set forth in this part are met,
and the out-of-band emission restrictions set forth in Sec. 74.936 or
paragraph (k) of this section are complied with.
(b) ITFS response stations that utilize the 2150-2162 MHz band
pursuant to Sec. 74.902(f), the 2500-2686 MHz band, and/or the 125 kHz
channels identified in paragraph (j) of this section may be installed
and operated without an individual license, to communicate with a
response station hub, provided that the conditions set forth in
paragraph (g) of this section are met and that ITFS response stations'
technical parameters are consistent with all applicable rules in this
part and with the terms and conditions set out in the Commission's
Declaratory Ruling and Order, 11 FCC Rcd 18839 (1996).
(c) An applicant for a response station hub license, or for
modification thereto, shall:
(1) File FCC Form 331 with the Commission in Washington, DC, and
certify on that form that it has complied with the requirements of
paragraphs (c)(2) and (d) of this section and that the interference
data submitted under paragraph (d) of this section is complete and
accurate. Failure to certify compliance and to comply completely with
the requirements of paragraphs (c)(2) and (d) of this section shall
result in dismissal of the application or revocation of the response
station hub license, and may result in imposition of a monetary
forfeiture; and
(2) Submit the following (see Sec. 21.902(m) for permissible formats and
media) to the Commission's Reference Room:
(i) The data files required by Appendix D (as amended) to the Report
and Order in MM Docket 97-217, FCC 98-231, "Methods For Predicting
Interference From Response Station Transmitters And To Response
Station Hubs And For Supplying Data on Response Station Systems"; and
(ii) The demonstrations and certifications required by paragraph (d)
of this section.
(d) An applicant for a response station hub license shall prepare the
following:
(1) A demonstration describing the system channel plan, to the extent
that such information is not contained in the data file required in
(c)(2)(i) of this section; and
(2) A demonstration that:
(i) The proposed response station hub is within the protected service
area, as defined in Sec. 21.902(d)(1) of this chapter, of the ITFS
station(s) whose channels will be used for communications to the
response station hub or, in the case of an application for response
stations to utilize one or more of the 125 kHz response channels, the
response station hub is within the protected service area of the
station authorized to utilize the associated channel(s); and
(ii) The entire proposed response service area is within the protected
service area of the ITFS station(s) whose channels will be used for
communications to the response station hub or, in the alternative, the
applicant may demonstrate that the licensee of any cochannel protected
service area which is overlapped by the proposed response service area
has consented to such overlap. In the case of an application for
response stations to utilize one or more of the 125 kHz response
channels, such demonstration shall establish that the response service
area is entirely within the protected service area of the station
authorized to utilize the associated channel(s), or, in the
alternative, that the licensee entitled to any cochannel protected
service area which is overlapped by the proposed response service area
has consented to such overlap; and
(iii) The combined signals of all simultaneously operating ITFS
response stations within all response service areas and oriented to
transmit towards their respective response station hubs and all
cochannel ITFS stations and booster stations licensed to or applied
for by the applicant will not generate a power flux density in excess
of -73 dBW/m 2 (or the appropriately adjusted value based on the
actual bandwidth used if other than 6 MHz, see Sec. 74.903(a)(6)(i))
outside the boundaries of the applicant's protected service area, as
measured at locations for which there is an unobstructed signal path,
except to the extent that consent of affected licensees has been
obtained or consents have been granted pursuant to paragraph
(d)(3)(ii) of this section to an extension of the response service
area beyond the boundaries of the protected service area; and
(iv) The combined signals of all simultaneously operating ITFS
response stations within all response service areas and oriented to
transmit towards their respective response station hubs, and all
cochannel ITFS stations and booster stations licensed to or applied
for by the applicant, will result in a desired to undesired signal
ratio of at least 45 dB (or the appropriately adjusted value based on
the actual bandwidth used if other than 6 MHz, see Sec. 74.903(a)(6)(ii)):
(A) Within the protected service area of any authorized or
previously-proposed cochannel MDS or ITFS station with a 56.33 km (35
mile) protected service area with center coordinates located within
160.94 km (100 miles) of the proposed response station hub; and
(B) Within the booster service area of any cochannel booster station
entitled to such protection pursuant to Sec. Sec. 21.913(f) of this chapter or
74.985(f) and located within 160.94 km (100 miles) of the proposed
response station hub; and
(C) At any registered receive site of any authorized or
previously-proposed cochannel ITFS station or booster station located
within 160.94 km (100 miles) of the proposed response station hub, or,
in the alternative, that the licensee or applicant for such cochannel
station or hub consents to the application; and
(v) The combined signals of all simultaneously operating ITFS response
stations within all response service areas and oriented to transmit
towards their respective response station hubs, and all cochannel ITFS
stations and booster stations licensed to or applied for by the
applicant, will result in a desired to undesired signal ratio of at
least 0 dB (or the appropriately adjusted value based on the actual
bandwidth used if other than 6 MHz, see Sec. 74.903(a)(6)(iii)):
(A) Within the protected service area of any authorized or
previously-proposed adjacent channel MDS or ITFS station with a 56.33
km (35 mile) protected service area with center coordinates located
within 160.94 km (100 miles) of the proposed response station hub; and
(B) Within the booster service area of any adjacent channel booster
station entitled to such protection pursuant to Sec. Sec. 21.913(f) of this
chapter or 74.985(f) and located within 160.94 km (100 miles) of the
proposed response station hub; and
(C) At any registered receive site of any authorized or
previously-proposed adjacent channel ITFS station or booster station
located within 160.94 km (100 miles) of the proposed response station
hub, or, in the alternative, that the licensee of or applicant for
such adjacent channel station or hub consents to such application; and
(vi) The combined signals of all simultaneously operating ITFS
response stations within all response service areas and oriented to
transmit toward their respective response station hub and all
cochannel ITFS stations and booster stations licensed to or applied
for by the applicant will comply with the requirements of Sec. Sec. 21.909(i)
of this chapter and paragraph (i) of this section.
(3) [Reserved]
(4) A certification that the application has been served upon
(i) The holder of any cochannel or adjacent channel authorization with
a protected service area which is overlapped by the proposed response
service area;
(ii) The holder of any cochannel or adjacent channel authorization
with a protected service area that adjoins the applicant's protected
service area;
(iii) The holder of a cochannel or adjacent channel authorization for
any BTA or PSA inside whose boundaries are locations for which there
is an unobstructed signal path for combined signals from within the
response station hub applicant's protected service area; and
(iv) Every licensee of, or applicant for, any cochannel or adjacent
channel, authorized or previously-proposed, incumbent MDS station with
a 56.33 km (35 mile) protected service area with center coordinates
located within 160.94 km (100 miles) of the proposed response station
hub; and
(v) Every licensee of, or applicant for, any cochannel or adjacent
channel, authorized or previously-proposed ITFS station (including any
booster station or response station hub) located within 160.94 km (100
miles) of the proposed response station hub.
(e) Applications for response station hub licenses shall be deemed
minor change applications and, except as provided in Sec. 74.911(e), may
be filed at any time. Notwithstanding any other provision of part 74,
applications for response station hub licenses meeting the
requirements of paragraph (c) of this section shall cut-off
applications that are filed on a subsequent day for facilities that
would cause harmful electromagnetic interference to the proposed
response station hubs. A response station hub shall not be entitled to
protection from interference caused by facilities proposed on or prior
to the day the application for the response station hub license is
filed. Response stations shall not be required to protect from
interference facilities proposed on or after the day the application
for the response station hub license is filed.
(f) Notwithstanding the provisions of Sec. 74.912 and except as provided
by Sec. 74.911(e), any petition to deny an application for a response
station hub license shall be filed no later than the sixtieth (60th)
day after the date of public notice announcing the filing of such
application or major amendment thereto. Except as provided in
Sec. 74.911(e), an application for a response station hub license that
meets the requirements of this section shall be granted on the
sixty-first (61st) day after the Commission shall have given public
notice of the acceptance for filing of it, or of a major amendment to
it if such major amendment has been filed, unless prior to such date
either a party in interest timely files a formal petition to deny or
for other relief pursuant to Sec. 74.912, or the Commission notifies the
applicant that its application will not be granted. Where an
application is granted pursuant to the provisions of this paragraph,
the conditional licensee or licensee shall maintain a copy of the
application at the response station hub until such time as the
Commission issues a response station hub license.
(g) An ITFS response station hub license establishing a response
service area shall be conditioned upon compliance with the following:
(1) No ITFS response station shall be located beyond the response
service area of the response station hub with which it communicates;
and
(2) No ITFS response station shall operate with a transmitter output
power in excess of 2 watts; and
(3) No response station shall operate with an EIRP in excess of that
specified in the application for the response station hub for the
particular regional class of characteristics with which the response
station is associated, and such response station shall not operate
with an EIRP in excess of 33 dBW + 10log(X/6) dBW, where X is the
channel width in MHz, and
(4) Each response station shall employ a transmission antenna oriented
towards the response station hub with which the response station
communicates and such antenna shall be no less directive than the
worst-case outer envelope pattern specified in the application for the
response station hub for the regional class of characteristics with
which the response station is associated; and
(5) The combined out-of-band emissions of all response stations using
all or part of one or multiple contiguous 6 MHz channels and employing
digital modulation shall comply with Sec. 74.936(e). The combined
out-of-band emissions of all response stations using all or part of
one or multiple contiguous 125 kHz channels shall comply with
paragraph (k) of this section. However, should harmful interference
occur as a result of emissions outside the assigned channel,
additional attenuation may be required; and
(6) The response stations transmitting simultaneously at any given
time within any given region of the response service area utilized for
purposes of analyzing the potential for interference by response
stations shall conform to the numerical limits for each class of
response station proposed in the application for the response station
hub license. Notwithstanding the foregoing, where a response station
hub licensee subchannelizes pursuant to Sec. 74.939(a) and limits the
maximum EIRP emitted by any individual response station
proportionately to the fraction of the channel that the response
station occupies, the licensee may operate simultaneously on each
subchannel the number of response stations specified in the license.
Moreover, the licensee of a response station hub may alter the number
of response stations of any class operated simultaneously in a given
region, without prior Commission authorization, provided that the
licensee:
(i) Files with the Commission (see Sec. 21.902(m) for permissible
format(s) and media) a demonstration indicating the number of response
stations of such class(es) to be operated simultaneously in such
region and a certification that it has complied with the requirements
of paragraphs (g)(6)(ii) and (iii) of this section and that the
interference data submitted pursuant to paragraph (g)(6)(ii) is
complete and accurate; and
(ii) Provides the Commission's Reference Room (see Sec. 21.902(m) for
permissible formats and media) with an update of the previously-filed
response station data and with a demonstration that such alteration
will not result in any increase in interference to the protected
service area or protected receive sites of any existing or
previously-proposed, cochannel or adjacent channel MDS or ITFS station
or booster station, to the protected service area of any MDS Basic
Trading Area or Partitioned Service Area licensee entitled to
protection pursuant to paragraph (d)(3) of this section, or to any
existing or previously-proposed, cochannel or adjacent channel
response station hub, or response station under Sec. 21.949 or Sec. 74.949 of
this chapter; or that the applicant for or licensee of such facility
has consented to such interference; and
(iii) Serves a copy of such demonstration and certification upon each
party entitled to be served pursuant to paragraph (d)(3) of this
section; and
(7) Where an application is granted under this section, if a facility
operated pursuant to that grant causes harmful, unauthorized
interference to any cochannel or adjacent channel facility, it must
promptly remedy the interference or immediately cease operations of
the interfering facility, regardless of whether any petitions to deny
or for other relief were filed against the application during the
application process. The burden of proving that a facility operated
under this section is not causing harmful, unauthorized interference
lies on the licensee of the alleged interfering facility, following
the filing of a documented complaint of interference by an affected
party; and
(8) In the event any MDS or ITFS receive site suffers interference due
to block downconverter overload, the licensee of each non-co/adjacent
response station hub with a response service area within five miles of
such receive site shall cooperate in good faith to expeditiously
identify the source of the interference. Each licensee of a response
station hub with an associated response station contributing to such
interference shall bear the joint and several obligation to promptly
remedy all block downconverter overload interference at any ITFS
registered receive site or at any receive site within an MDS or ITFS
protected service area applied for prior to the submission of the
application for the response station hub license, regardless of
whether the receive site suffering the interference was constructed
prior to or after the construction of the response station(s) causing
the downconverter overload; provided, however, that the licensee of
the registered ITFS receive site or the MDS or ITFS protected service
area must cooperate fully and in good faith with efforts by the
response station hub licensee to prevent interference before
constructing response stations and/or to remedy interference that may
occur. In the event that the associated response station(s) of more
than one response station hub licensee contribute(s) to block
downconverter interference at an MDS or ITFS receive site, such hub
licensees shall cooperate in good faith to remedy promptly the
interference.
(h) Applicants must comply with part 17 of this chapter concerning
notification to the Federal Aviation Administration of proposed
antenna construction or alteration for all hub stations and associated
response stations.
(i) Response station hubs shall be protected from cochannel and
adjacent channel interference in accordance with the following
criteria:
(1) An applicant for any new or modified MDS or ITFS station
(including any high-power booster station or response station hub)
shall be required to demonstrate interference protection to a response
station hub within 160.94 km (100 miles) of the proposed facilities.
In lieu of the interference protection requirements set forth in
Sec. Sec. 21.902(i) of this chapter, 21.938(b)(3) of this chapter and 74.903,
such demonstration shall establish that the proposed facility will not
increase the effective power flux density of the undesired signals
generated by the proposed facility and any associated main stations,
booster stations or response stations at the response station hub
antenna for any sector. In lieu of the foregoing, an applicant for a
new MDS or ITFS main station license or for a new or modified response
station hub or booster license may demonstrate that the facility will
not increase the noise floor at a reception antenna of the response
station hub by more than 1 dB for cochannel signals and 45 dB for
adjacent channel signals, provided that:
(i) The entity submitting the application may only invoke this
alternative once per response station hub reception sector; or
(ii) The licensee of the affected response station hub may consent to
receive a certain amount of interference at its hub.
(2) Commencing upon the filing of an application for an ITFS response
station hub license and until such time as the application is
dismissed or denied or, if the application is granted, a certification
of completion of construction is filed on FCC Form 330A, the ITFS
station whose channels are being utilized shall be entitled both to
interference protection pursuant to Sec. Sec. 21.902(i) and 21.938(b)(3) of
this chapter and 74.903, and to protection of the response station hub
pursuant to the preceding paragraph. Unless the application for the
response station hub license specifies that the same frequencies also
will be employed for digital and/or analog point-to-multipoint
transmissions by ITFS stations and/or ITFS booster stations, upon the
submission of a certification of completion of construction of an ITFS
response station hub on FCC Form 330A where the channels of an ITFS
station are being utilized as response station transmit frequencies,
the ITFS station whose channels are being utilized for response
station transmissions shall no longer be entitled to interference
protection pursuant to Sec. Sec. 21.902(i) and 21.938(b)(3) of this chapter
and 74.903 within the response service area with regard to any portion
of any 6 MHz channel employed solely for response station
communications. Upon the submission of a certification of completion
of construction of an ITFS response station hub on FCC Form 330A where
the channels of an ITFS station are being utilized for response
station transmissions and the application for the response station hub
license specifies that the same frequencies will be employed for
point-to-multipoint transmissions, the ITFS station whose channels are
being utilized shall be entitled both to interference protection
pursuant to Sec. Sec. 21.902(i) and 21.938(b)(3) of this chapter and 74.903,
and to protection of the response station hub pursuant to the
preceding provisions of this paragraph.
(j) ITFS response stations may operate on either all or part of a 6
MHz channel assigned a licensee, on any 125 kHz channel assigned a
licensee, or on adjacent frequencies authorized to multiple licensees
where such stations are operated jointly. The 125 kHz channels listed
in the following table shall be assigned to the licensees of MDS and
ITFS stations for use at response stations, or for licensing for
point-to-multipoint transmissions pursuant to paragraph (l) of this
section, in accordance with the table. The specified 125 kHz frequency
channel may be subdivided to provide a distinct operating frequency
for each of more than one station, or may be combined with adjacent
channels, provided that digital modulation is employed in accordance
with paragraph (a) of this section. The specified 125 kHz frequency
channels also may be exchanged with the licensee of another MDS or
ITFS station for use of another 125 kHz channel assigned to the other
licensee.
------------------------------------------------------------------------
Main 125 kHz
Frequency (MHz) channel channel
designation designation
------------------------------------------------------------------------
2686.0625 A1 I1
2686.1875 B1 I2
2686.3125 C1 I3
2686.4375 D1 I4
2686.5625 E1 I5
2686.6875 F1 I6
2686.8125 G1 I7
2686.9375 H1 I8
2687.0625 A2 I9
2687.1875 B2 I10
2687.3125 C2 I11
2687.4375 D2 I12
2687.5625 E2 I13
2687.6875 F2 I14
2687.8125 G2 I15
2687.9375 H2 I16
2688.0625 A3 I17
2688.1875 B3 I18
2688.3125 C3 I19
2688.4375 D3 I20
2688.5625 E3 I21
2688.6875 F3 I22
2688.8125 G3 I23
2688.9375 H3 I24
2689.0625 A4 I25
2689.1875 B4 I26
2689.3125 C4 I27
2689.4375 D4 I28
2689.5625 E4 I29
2689.6875 F4 I30
2689.8125 G4 I31
------------------------------------------------------------------------
(k) 125 kHz wide response channels shall be subject to the following
requirements: The 125 kHz wide channel shall be centered at the
assigned frequency. If amplitude modulation is used, the carrier shall
not be modulated in excess of 100%. If frequency modulation is used,
the deviation shall not exceed # 25 kHz. Any emissions outside the
channel shall be attenuated at the channel edges at least 35 dB below
peak output power when analog modulation is employed or 35 dB below
licensed average output power when digital modulation is employed (or,
when subchannels are used, the appropriately adjusted value based upon
the ratio of the channel-to-subchannel bandwidths). Any emissions more
than 125 kHz from either channel edge, including harmonics, shall be
attenuated at least 60 dB below peak output power when analog
modulation is employed, or at least 60 dB below licensed average
output power when digital modulation is employed (or, when subchannels
are used, the appropriately adjusted value based upon the ratio of the
channel-to-subchannel bandwidths). Notwithstanding the foregoing, in
situations where adjacent channel licensees jointly transmit over more
than one channel utilizing digital modulation, the maximum out-of-band
power shall be attenuated at the edges of those combined channels at
least 35 dB relative to the licensed average power level of each
channel. Emissions more than 125 kHz from either edge of the combined
channels, including harmonics, shall be attenuated at least 60 dB
below peak analog power or licensed average digital power of each
channel, as appropriate. Different types of emissions may be
authorized for use on 125 kHz wide channels if the applicant describes
fully the modulation and bandwidth desired, and demonstrates that the
modulation selected will cause no more interference than is permitted
under this paragraph. Greater attenuation may be required if
interference is caused by out-of-channel emissions.
(l) Any MDS or ITFS conditional licensee or licensee who wishes to use
one or more of its associated I channels for point-to-multipoint
transmissions in a system with one or more authorized, or previously-
or simultaneously-proposed, response station hub(s) shall:
(1) File FCC Form 331 with the Commission, filing with Mellon Bank for
I channels associated with an MDS station, and filing with the
Commission in Washington, DC for I channels associated with an ITFS
station. The application shall specify which of the associated I
channels is/are intended for point-to-multipoint transmissions, or
whether an I channels station already authorized for
point-to-multipoint transmissions is being modified. The applicant
also shall certify on the appropriate form that it has complied with
the requirements of paragraph (l)(2) of this section. Failure to
certify compliance and to comply completely with the requirements of
paragraph (l)(2) of this section shall result in dismissal of the
application or revocation of the authorization for point-to-multipoint
transmissions on the relevant I channels, and may result in imposition
of a monetary forfeiture. Modification applications to convert I
channels associated with ITFS stations to point-to-multipoint
transmissions shall be considered minor changes for purposes of
Sec. 74.911. These applications shall be subject to the procedures set
forth in Sec. 21.27(d) of this chapter or Sec. 74.911(e), as appropriate; and
(2) Submit to the Commission's Reference Room (see Sec. 21.902(m) for
permissible format(s) and media) the following:
(i) Duplicates of the Form 331 filed with Mellon Bank or with the
Commission, as appropriate; and
(ii) The interference analyses required to be performed under Sec. 21.902
of this chapter, and Sec. 21.938 of this chapter where appropriate,
including the provisions of Sec. Sec. 21.909 of this chapter, 21.913 of this
chapter, 74.939 and 74.985 regarding the protection of response
station hubs and booster service areas from harmful electromagnetic
interference, and including protection of stations authorized pursuant
to Sec. Sec. 21.949 of this chapter and 74.949 from harmful electromagnetic
interference, using the appropriately adjusted interference protection
values based upon the ratio of the bandwidths in use; and
(3) Except as provided in Sec. 21.27(d) of this chapter or Sec. 74.911(e), as
appropriate, be permitted to file applications to convert associated I
channels to point-to-multipoint transmissions at any time. I channels
used for point-to-multipoint transmissions shall be afforded
interference protection in the same manner as other
point-to-multipoint MDS and ITFS facilities, with appropriate
adjustment of the interference protection values for bandwidth.
Notwithstanding any other provision of parts 21 and 74, applications
to convert associated I channels to point-to-multipoint transmissions,
meeting the requirements of paragraphs (l) (1) and (2) of this
section, shall cut-off applications that are filed on a subsequent day
for facilities that would cause harmful electromagnetic interference
to the proposed point-to-multipoint operations; and
(4) Notwithstanding the provisions of Sec. Sec. 21.30(a)(4) of this chapter
and 74.912, and except as provided in Sec. 21.27(d) of this chapter or
Sec. 74.911(e), as appropriate, be subject to a petition to deny an
application to convert associated I channels to point-to-multipoint
transmissions that is filed no later than the sixtieth (60th) day
after the date of public notice announcing the filing of such
application or major amendment thereto. Notwithstanding Sec. Sec. 21.31 of
this chapter and 74.911(d), and except as provided in Sec. 21.27(d) of
this chapter or Sec. 74.911(e), as appropriate, an application to convert
associated I channels to point-to-multipoint transmissions that meets
the requirements of this paragraph shall be granted on the sixty-first
(61st) day after the Commission shall have given public notice of the
acceptance for filing of it, or of a major amendment to it if such
major amendment has been filed, unless prior to such date either a
party in interest timely files a formal petition to deny or for other
relief pursuant to Sec. 21.30(a) of this chapter or Sec. 74.912, or the
Commission notifies the applicant that its application will not be
granted. Where an application is granted pursuant to the provisions of
this paragraph, the conditional licensee or licensee shall maintain a
copy of the application at the I channels station until such time as
the Commission issues an I channels station license for
point-to-multipoint transmissions; and
(5) Where an application is granted under this paragraph, and a
facility operated pursuant to that grant causes harmful, unauthorized
interference to any cochannel or adjacent channel facility, promptly
remedy the interference or immediately cease operations of the
interfering facility, regardless of whether any petitions to deny or
for other relief were filed against the application during the
application process. The burden of proving that a facility operated
under this paragraph is not causing harmful, unauthorized interference
lies on the licensee of the alleged interfering facility, following
the filing of a documented complaint of interference by an affected
party.
(6) A certification that copies of the materials set forth in
paragraph (l)(2) of this section have been served upon the licensee or
conditional licensee of each station (including each response station
hub and booster station) required to be studied pursuant to paragraph
(l)(3) of this section, and upon any affected holder of a Basic
Trading Area or Partitioned Service Area authorization pursuant to
paragraph (l)(2) of this section.
(m) A response station may be operated unattended. The overall
performance of the response station transmitter shall be checked by
the hub licensee as often as necessary to ensure that it is
functioning in accordance with the requirements of the Commission's
rules. The licensee of a response station hub is responsible for the
proper operation of all associated response station transmitters. Each
response station hub licensee is responsible for maintaining, and
making available to the Commission upon request, a list containing all
customer names and addresses, plus the technical parameters (EIRP,
emission, bandwidth, antenna pattern/height/orientation/polarization)
pertinent to each class of response station within the response
service area.
(n) The transmitting apparatus employed at ITFS response stations
shall have received type certification.
(o) An ITFS response station shall be operated only when engaged in
communications with its associated ITFS response station hub or ITFS
station or booster station, or for necessary equipment or system tests
and adjustments. Upon initial installation, and upon relocation and
reinstallation, a response station transmitter shall be incapable of
emitting radiation unless, and until, it has been activated by
reception of a signal from the associated ITFS station or booster
station. A hub station licensee shall be capable of remotely
de-activating any and all response station transmitters within its RSA
by means of signals from the associated ITFS station or booster
station. Radiation of an unmodulated carrier and other unnecessary
transmissions are forbidden.
(p) All response stations utilizing an EIRP greater than 18 dBW shall
be installed by the associated hub licensee or by the licensee's
employees or agents. For the purposes of this section, all EIRP dBW
values assume the use of a 6 MHz channel. For channel bandwidths other
than 6 MHz, the EIRP dBW values should be adjusted up (channel >6 MHz)
or down (channel <6 MHz) by 10 log(X/6) dBW, where X is the channel
width in MHz. For response stations located within 1960 feet of an
ITFS receive site registered and built prior to the filing of the
application for the hub station license, the hub licensee must notify
the licensee of the ITFS receive site at least one business day prior
to the activation of these response stations. The notification must
contain, for each response station to be activated, the following
information: name and telephone number of a contact person who will be
responsible for coordinating the resolution of any interference
problems; street address; geographic coordinates to the nearest
second; channels/subchannels (transmit only); and transmit antenna
pattern, EIRP, orientation and height AMSL. (If transmit antenna
pattern, EIRP, orientation or height AMSL are not known with
specificity at the time of notification, the hub licensee may,
instead, specify the worst-case values for the class of response
station being activated.) Such notice to the ITFS licensee shall be
given in writing by certified mail unless the ITFS licensee has
requested delivery by email or facsimile. The ITFS licensee may waive
the notification requirement on a site-specific basis or on a
system-wide basis. The notification provisions of this section shall
not apply if:
(1) The response station will operate at an EIRP no greater than -6
dBW; or
(2) The response station will operate at an EIRP greater than -6 dBW
and no more than 18 dBW and:
(i) The channels being received at the ITFS site are neither the same
as, nor directly adjacent to, the channel(s) to be transmitted from
the response station; and
(ii) The hub station licensee has replaced, at its expense, the
frequency downconverters used at all ITFS receive sites registered and
constructed prior to the filing of the hub station application which
are within 1960 feet of the hub station's response service area; and
(iii) The downconverters, at a minimum, conform to the following
specifications:
(A) A frequency of operation covering the 2150-2162 MHz band or the
2500-2686 MHz band; and
(B) A third-order intercept point of 30 dBm; and
(C) A conversion gain of 32 dB, or the same conversion gain as the
existing ITFS downconverter, whichever is least; and
(D) A noise figure of no greater than 2.5 dB, or no more than 1 dB
greater than the noise figure of the existing ITFS downconverter,
whichever is greater; and
(iv) The proposal to upgrade the ITFS downconverter was made in
writing and served upon the affected ITFS licensee, conditional
licensee or applicant at the same time the application for the
response station hub license was served on cochannel and adjacent
channel ITFS parties and no objection was made within the 60-day
period allowed for petitions to deny the hub station application.
(q) Interference calculations shall be performed in accordance with
Appendix D (as amended) to the Report and Order in MM Docket 97-217,
FCC 98-231, "Methods For Predicting Interference From Response Station
Transmitters and To Response Station Hubs and For Supplying Data on
Response Station Systems." (Note: This document is subject to change
and will be updated/amended as needed without prior notification.
Applicants should always utilize the most current version of the
document, as found at the Commission's internet web site,
http://www.fcc.gov/mmb/vsd/files/methodology.doc). Compliance with
out-of-band emission limitations shall be established in accordance
with Sec. 21.908(e) of this chapter.
[ 63 FR 65119 , Nov. 25, 1998, as amended at 64 FR 63740 , Nov. 22, 1999;
65 FR 46623 , July 31, 2000]
Goto Section: 74.938 | 74.949
Goto Year: 2004 |
2006
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