They are hard-wired to the recorder in the trunk of the car. Started at the
beginning of watch, checked in at the end of the watch or shift.
Neither the audio or video are transmitted from the vehicle. This is for the
regular patrol cameras.
For the "Covert" installations..thats a differant story. Law enforcement
agencies can (and DO) use ***ANY*** frequency they please on a
non-interfering basis with the primary licensee. That means if your local
police dept wants to conduct a surviellance on the channel normally used for
the school district's car to car channel they can.
Frequencies they wont use....HAM or Amatuer, CB..(27 and 462/467)all classes
due to interferance.They will not use the 5 MURS channels due to
interferance.They will not use FRS.They tend to NOT use any "IB" frequencies
due to interferance and being overheard.Local Law Enforcement will not use
the 136-143Mhz military band.
Frequencies they WILL use.....Federal assignments(see 406-420Mhz and
162-172Mhz),Aircraft channels from 118-136Mhz AM(high altitude
surviellance), neighboring law enforcement's assigned channels.Local
NON-USED television channels!!! yeah..you heard right. If TV channel 8 is
not used in your area its a perfect place to hide a narrow band FM planted
mike.( no high power stuff,typically 100mw.) TV audio is 25Khz wide and even
if your on top of the mike...with it's 3-5Khz wide audio you wont hear much.
Hope this helps....happy monitoring!...Eddie

"JAMEZY NJ" wrote in message
...
Does anyone know the frequency that the Camera Mics in Police Cars use?