Sec. 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

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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]

                          Subpart E [Reserved]

           Subpart F--Competitive Bidding Procedures for DARS

    Source:  62 FR 11106 , Mar. 11, 1997, unless otherwise noted.