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 ° to plus 50  °C. They must be certificated.

   (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;  63 FR 36610 , July 7, 1998]