Goto Section: 25.280 | 25.282 | Table of Contents
FCC 25.281
Revised as of October 1, 2011
Goto Year:2010 |
2012
§ 25.281 Automatic Transmitter Identification System (ATIS).
All satellite uplink transmissions carrying broadband video information
shall be identified through the use of an automatic transmitter
identification system as specified below.
(a) Effective March 1, 1991, all satellite video uplink facilities
shall be equipped with an ATIS encoder meeting the specifications set
forth in paragraph (d) of this section.
(b) All video uplink facilities utilizing a transmitter manufactured on
or after March 1, 1991 shall be equipped with an ATIS encoder meeting
the performance specifications set forth in paragraph (d) of this
section and the encoder shall be integrated into the uplink transmitter
chain in a method that cannot easily be defeated.
(c) The ATIS signal shall be a separate subcarrier which is
automatically activated whenever any RF emissions occur. The ATIS
information shall continuously repeat.
(d) The ATIS signal shall consist of the following:
(1) A subcarrier signal generated at a frequency of 7.1 MHz +-25 KHz
and injected at a level no less than -26 dB (referenced to the
unmodulated carrier). The subcarrier deviation shall not exceed 25 kHz
peak deviation.
(2) The protocol shall 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 shall frequency modulate the subcarrier signal.
(3) The ATIS signal as a minimum shall consist of the following:
(i) The FCC assigned earth station call sign;
(ii) A telephone number providing immediate access to personnel capable
of resolving ongoing interference or coordination problems with the
station;
(iii) A unique ten digit serial number of random number code programmed
into the ATIS device in a permanent manner such that it cannot be
readily changed by the operator on duty;
(iv) Additional information may be included within the ATIS data stream
provided the total message length, including ATIS, does not exceed 30
seconds.
[ 55 FR 21551 , May 25, 1990. Redesignated at 62 FR 5932 , Feb. 10, 1997]
Goto Section: 25.280 | 25.282
Goto Year: 2010 |
2012
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