Birdie Frequencies - Grecom PSR-410 Owner's Manual

and memory information. Power-on key sequences are also used to place
your scanner into firmware upgrade mode for CPU firmware upgrades.
The following table lists the power-on key sequences available in the PSR-
410. Unless otherwise specified, each sequence is invoked by pressing
and releasing each key in sequence, one at a time. The first key must be
pressed while the Welcome/Owner screen is being displayed:
Key Sequence
1
2
3
DIM
ATT
0, 0
0, 1
0, 2
0, 5
Hold PROG while
powering on ra-
dio

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 SQ clockwise to omit the birdie.
To find the birdies in your 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 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. This is a birdie. Make a list of all the birdies in your scanner for
future reference.
Shortcut to PGM>GLOB>Sound Mode
Shortcut to PGM>GLOB>Key Beeps
Displays Boot, CPU versions
Shortcut to PGM>GLOB>Light Mode
Shortcut to PGM>GLOB>Atten Mode
Shortcut to PGM>GLOB>Memory Info
Destructive, clears working memory and resets all Global
settings to factory defaults.
Destructive, resets all Global settings to factory defaults.
Does not affect working memory.
Destructive, executes EEPROM memory test, then clears
working memory and resets all Global settings to factory
defaults.
Places radio in CPU firmware upgrade mode
Function
81