General Guide To Scanning; Birdie Frequencies; Specified Intervals - GRE PSR-216 Owner's Manual

GENERAL GUIDE TO SCANNING

BIRDIE FREQUNCIES
Every scanner has birdie frequencies. Birdies are signals
created inside the scanner's receiver. These operating fre-
quencies might interfere with broadcasts on the same fre-
quencies. If you program one of these frequencies, you hear
only noise on that frequency. If the interference is not se-
vere, you might be able to turn SQUELCH clockwise to cut
out the birdie.
The birdie frequencies on this unit to watch for are:
72.170 80.300
144.550 150.150
168.635 385.450
401.7625 409.050
429.050 431.225
489.150 497.875
811.5625 819.600
836.700 814.975
859.7875 867.250
908.000 915.4375
940.150 944.050
To find the birdies in your scanner, being by disconnecting
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 scan every frequency
range from its lowest frequency to the highest. Occasionally,
the searching will stop as if it had found a signal, often with-
out any sound. That is a birdie. Make a list of all the birdies in
your scanner for future reference.

SPECIFIED INTERVALS

Frequencies in different bands are accessible only at spe-
cific intervals. For example:
Frequency Ranges
68-88, 137-144 and 146-174 MHz 5.0 kHz steps
108-136.9875, 144-146,
380-512 and 806-960 MHz 12.5 kHz steps
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85.775 136.5125
152.575 160.605
392.925 393.725
415.1875 425.1250
441.200 466.050
505.900 809.900
825.9375 827.6375
843.7125 851.750
891.925 899.9625
924.075 930.1875
947.550 956.2125
Specified Interval
2004/04/08, 16:50