Birdie Frequencies; Frequency Conversion - GRE PSR-200U Owner's Manual

Birdie Frequencies

Every scanner has birdie frequencies. Birdies are signals created 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 SQUELCH clockwise to cut out the birdie.
To find the birdies in your individual scanner, begin 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 tune
function and tune every frequency range from its lowest frequency to the
highest. Occasionally, the tune 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.

Frequency Conversion

The tuning location of a station can be expressed in frequency (kHz or MHz)
or in wavelength (meters). The following information can help you make the
necessary conversions.
1 MHz (million) = 1,000 kHz (thousand)
• To convert MHz to kHz, multiply the number of megahertz by 1,000:
30.62 (MHz) x 1000 = 30,620 kHz
• To convert from kHz to MHz, divide the number of kilohertz by 1,000:
127,800 (kHz) / 1000 = 127.8 MHz
• To convert MHz to meters, divide 300 by the number of megahertz:
300 / 50 MHz = 6 meters
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