Goto Section: 25.280 | 25.282 | Table of Contents
Revised as of October 1, 2016
Goto Year:2015 |
§ 25.281 Transmitter identification requirements for video uplink
(a) Earth-to-space transmissions carrying video information with analog
modulation must be identified through use of an Automatic Transmitter
Identification System (ATIS) with an analog identifier or a direct
sequence spread spectrum signal.
(1) Use of an analog identifier must be in accordance with the
(i) The ATIS signal must be a separate subcarrier that is automatically
activated whenever any radio frequency signal is transmitted.
(ii) The ATIS message must continuously repeat.
(iii) The ATIS subcarrier signal must be generated at a frequency of
7.1 MHz ±25 kHz and modulate the uplink radio frequency carrier at a
level no less than −26 dB (referenced to the unmodulated carrier).
(iv) ATIS subcarrier deviation must not exceed 25 kHz.
(v) The ATIS message protocol must be International Morse Code keyed by
a 1200 Hz ±800 Hz tone representing a mark and a message rate of 15 to
25 words per minute. The tone must frequency-modulate the subcarrier
signal with the ATIS message.
(vi) The ATIS message must include the FCC-assigned call sign of the
transmitting earth station, a telephone number providing immediate
access to personnel capable of resolving interference or coordination
problems, and a unique serial number of ten or more digits programmed
into the ATIS message in a permanent manner so that it cannot be
readily changed by the operator on duty. Additional information may be
included in the ATIS data stream provided the total ATIS message length
does not exceed 30 seconds.
(2) Use of a direct sequence spread spectrum ATIS signal must be in
accordance with the requirements in paragraphs (b)(1) and (2) of this
(b) As of September 3, 2016, transmissions of fixed-frequency,
digitally modulated video signals with a symbol rate of 128,000/s or
more from Satellite News Gathering vehicles or other temporary-fixed
earth stations must be identified through use of an ATIS in accordance
with the following requirements:
(1) The ATIS message must be modulated onto a direct sequence spread
spectrum signal in accordance with the DVB-CID standard, ETSI TS 103
129 (2013-05), “Technical Specification, Digital Video Broadcasting
(DVB); Framing structure, channel coding and modulation of a carrier
identification system (DVB-CID) for satellite transmission.” This
document is incorporated by reference in accordance with 5 U.S.C.
552(a) and 1 CFR part 51 and approved by the Director of the Federal
Register. The ETSI document may be obtained from ETSI, 650 Route des
Lucioles, 06921 Sophia Antipolis Cedex, France and by email to
email@example.com and a copy can be downloaded from
http://www.etsi.org. You may inspect a copy at the Federal
Communications Commission, 445 12th Street SW., Washington, DC 20554,
or at the National Archives and Records Administration (NARA). For
information on the availability of this material at NARA, call
202-741-6030 or go to:
(2) The ATIS message must continuously repeat.
(c) ATIS equipment must be integrated into the uplink transmitter chain
with a method that cannot easily be defeated.
[ 79 FR 8325 , Feb. 12, 2014; 81 FR 33601 , May 31, 2016]
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Goto Section: 25.280 | 25.282
Goto Year: 2015 |
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