Radio Shack PRO-79 User Manual

41

Reception of the frequencies covered by your scanner is mainly
“line-of-sight.” That means you usually cannot hear stations that
are beyond the horizon.

Every scanner has birdie frequencies. Birdies are signals creat-
ed inside the scanner’s receiver. These operating frequencies
might interfere with transmissions 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 

 clockwise to cut out the birdie. This scan-

ner’s birdie frequencies (in MHz) are:

To find the birdies in your individual scanner, begin by discon-
necting the antenna and moving it away from the scanner. Make
sure that no other nearby radio or TV sets are turned on near
the scanner. Use the search function and search every frequen-
cy 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.

162.400

162.425

162.450

162.475

162.500

162.525

162.550

30.075

30.735

38.400

40.000

40.980

48.025

51.200

51.225

112.675

128.575

136.725

140.800

144.655

152.995

160.965

166.400

169.010

386.375

399.375

402.475

416.0375

426.625

434.675

442.100

447.425

456.075

458.175

464.3625

466.225

474.3125

480.575

490.3375

504.625

506.4125

20-314.fm  Page 41  Monday, December 13, 1999  12:55 PM