GRE PSR-255, Руководство пользователя

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19
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:
29.800
30.735 42.600 51.200
52.250 69.260 72.600 76.800
85.400 140.800 149.400 151.105
153.190 153.600 157.385 1593480
161.580 166.400
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 Specified Interval
26-54, 68-88, 137-144 and 146-174 MHz 5.0 kHz steps
144-146 and 380-512 MHz
12.5 kHz steps