PRO-26 Portable 200-Channel Scanner
(200-0506)                 General Guide              Faxback Doc. # 19196

A GENERAL GUIDE TO SCANNING

See "Guide to Scanning," Faxback Doc. 17653.

BIRDIE FREQUENCIES

Every scanner has birdie frequencies.  Birdies are signals created inside
the scanner's receiver.  These operating frequencies might interfere with
broadcasts on the same frequencies.  If you program one of these 
frequencies, you hear only noise on that frequency.  If the interference
is not severe, you might be able to turn SQUELCH clockwise to cut out the
birdie.  You can also use the search skip memories to avoid unwanted birdie 
frequencies.

Here are the birdie frequencies on this unit that you might want to watch
for:

      38.4000     311.7500     313.1625     497.7500
      74.2000     312.2875     322.1625     818.9750
     115.2375     312.3000     341.8500     818.9875
     132.2750     312.3125     345.7125     820.7000
     137.6500     312.3250     368.7000     908.4500
     137.6400     312.4625     380.8875     967.8000
     230.4750     312.4750     403.3375    1083.9500
     288.0875     313.1250     423.6125    1083.9875
     288.1000     313.1375     628.6250    1114.0500
     311.7375     313.1500     455.3500    1260.3000
                                           1290.4000

To find the birdies in any receiver, begin by disconnecting the antenna and
moving it away from the receiver.  Make sure that no other nearby radio or
TV sets are turned on near the receiver.  Use the search function and scan
every frequency range from its lowest frequency to the highest.  
Occasionally, the searching will stop as if it had found a signal, often
without any sound.  That is a birdie.  Make a list of all the birdies in
your scanner for future reference.

(CS 1/24/96)