Sec. 90.269  Use of frequencies for self-powered vehicle detectors.

    (a) Frequencies subject to Sec. 90.20(d)(22) may be used for the 
operation of self-powered vehicle detectors by licensees of base/mobile 
stations in the Public Safety Pool in accordance with the following 
conditions:
    (1) All stations are limited to 100 milliwatts carrier power and 
20K00F7W, 20K00F7X, 20K00F8W, 20K00F8X, 20K00F9W or 20K00F9X emissions. 
The frequency deviation shall not exceed 5 kHz. No more than two 30 ms. 
pulses may be emitted for each vehicle sensed.
    (2) The transmitters must be crystal controlled with a frequency 
tolerance of plus or minus .005% from -20 deg. to plus 50  deg.C. They 
must be type accepted.
    (3) The total length of the transmission line plus antenna may not 
exceed one-half wavelength and must be integral with the unit.
    (4) All operation shall be on a secondary, non-interference basis.
    (b) [Reserved]
[ 48 FR 54982 , Dec. 8, 1983, as amended at  54 FR 38681 , Sept. 20, 1989; 
 62 FR 18929 , Apr. 17, 1997]

    Effective Date Note: At  62 FR 18929 , Apr. 17, 1997, Sec. 90.269 was 
amended by revising the introductory text of paragraph (a), effective 
Oct. 17, 1997.