PRO-2002 AM/FM Scanning Receiver
(200-0116)                 Birdies                    Faxback Doc. # 18976

Some frequencies may be difficult or impossible to receive.  If you
program-in one of these, the Scanner may lock up and you hear only noise.
These "birdies" are the products of internally generated signals mixing
with external signals like TV and FM broadcasts.  Telescopic antennas are
much more likely to pick up these undesirable signals-that is another good
reason for getting an outdoor, base-station type antenna for home
installations.

If the interference is not severe, you may be able to use SQUELCH to cut
out such annoying birdies.

A few of the most common birdies to watch out for are listed below.

             30.730 MHz               42.735 MHz 
             30.735                      ~ 
             30.745                   42.860 
             32.000                   44.790 
             32.005                      ~ 
             38.395                   44.810 
             38.400                  115.200 
             38.405                  121.600 
             40.975                  128.000 
               ~  
             40.990 

Even with the SQUELCH control set to maximum, scanning or searching may
stop on or around some of the frequencies listed above.  If the spurious
signal is strong enough (above 10uV in technical terms) you can listen to
it, but the Receiver will not auto scan/search.


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