Sec. 15.229  Operation within the band 40.66-40.70 MHz.

    (a) Unless operating pursuant to the provisions in Sec. 15.231, the 
field strength of any emissions within this band shall not exceed 1,000 
microvolts/meter at 3 meters.
    (b) As an alternative to the limit in paragraph (a) of this section, 
perimeter protection systems may demonstrate compliance with the 
following: the field strength of any emissions within this band shall 
not exceed 500 microvolts/meter at 3 meters, as determined using 
measurement instrumentations employing an average detector. The 
provisions in Sec. 15.35 for limiting peak emissions apply where 
compliance of these devices is demonstrated under this alternative 
emission limit.
    (c) The field strength of any emissions appearing outside of this 
band shall not exceed the general radiated emission limits in 
Sec. 15.209.
    (d) The frequency tolerance of the carrier signal shall be 
maintained within &177;0.01% of the operating frequency over a 
temperature variation of -20 degrees to +50 degrees C at normal supply 
voltage, and for a variation in the primary supply voltage from 85% to 
115% of the rated supply voltage at a temperature of 20 degrees C. For 
battery operated equipment, the equipment tests shall be performed using 
a new battery.
[ 54 FR 17714 , Apr. 25, 1989, as amended at  55 FR 33910 , Aug. 20, 1990]