Sec. 87.145  Acceptability of transmitters for licensing.

    (a) The Commission publishes a list of type approved and type 
accepted equipment entitled ``Radio Equipment List--Equipment Acceptable 
for Licensing.'' Copies of this list are available for inspection at any 
of the Commission's offices.
    (b) Each transmitter must be type accepted for use in these 
services, except as listed in paragraph (d) of this section. However, 
aircraft stations which transmit on maritime mobile frequencies must use 
transmitters type accepted for use in ship stations in accordance with 
part 80 of this chapter. Type acceptance under part 80 is not required 
for aircraft earth stations transmitting on maritime mobile-satellite 
frequencies. Such stations must be type accepted under part 87.
    (c) Some radio equipment installed on air carrier aircraft must meet 
the requirements of the Commission and the requirements of the FAA. The 
FAA requirements may be obtained from the FAA, Aircraft Maintenance 
Division, 800 Independence Ave., SW., Washington, DC 20591.

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    (d) The equipment listed below is exempted from type acceptance. The 
operation of transmitters which have not been type accepted must not 
result in harmful interference due to the failure of those transmitters 
to comply with technical standards of this subpart.
    (1) Development or Civil Air Patrol transmitters.
    (2) Flight test station transmitters for limited periods where 
justified.
    (3) U.S. Government transmitters furnished in the performance of a 
U.S. Government contract if the use of type accepted equipment would 
increase the cost of the contract or if the transmitter will be 
incorporated in the finished product. However, such equipment must meet 
the technical standards contained in this subpart.
    (4) ELTs notified in accordance with Sec. 87.147(e).
    (5) Signal generators when used as radionavigation land test 
stations (MTF).
    (e) Aircraft earth stations must correct their transmit frequencies 
for Doppler effect relative to the satellite. The transmitted signal may 
not deviate more than 335 Hz from the desired transmit frequency. (This 
is a root sum square error which assumes zero error for the received 
ground earth station signal and includes the AES transmit/receive 
frequency reference error and the AES automatic frequency control 
residual errors.) The applicant must attest that the equipment provides 
adequate Doppler effect compensation and where applicable, that 
measurements have been made that demonstrate compliance. Submission of 
data demonstrating compliance is not required unless requested by the 
Commission.
[ 53 FR 28940 , Aug. 1, 1988, as amended at  57 FR 45750 , Oct. 5, 1992;  58 FR 30127 , May 26, 1993;  58 FR 67695 , Dec. 22, 1993]