Basic Operation
This section is your main reference for using the scanner once you have programmed
conventional and trunked systems. Note that there are some slight differences to some
functions depending on whether you are trying to affect conventional operation or trunked
operation. Be sure to refer to the appropriate section depending on the mode you are using.
Turning On the Scanner
Turn the
VOLUME
control clockwise out of the detent position. The scanner automatically
starts scanning. Since there are no frequencies programmed in your scanner initially, you
may not receive any signals. Once you set the squelch and program some frequencies, you
will begin hearing conversations regularly.
Setting the Squelch
To set the squelch, you must be in the hold mode, and you should not be receiving a signal
on your scanner.
1. Press
▲
/HOLD
until you do not hear a signal.
2. Make sure that the
VOLUME
is set to a comfortable listening
level.
3. Think of the Squelch Control as a gate. Turn the
SQUELCH
control fully counterclockwise. This raises the “Squelch Gate” so
high that only very strong signals can get through.
4. Turn
SQUELCH
clockwise until you hear a hiss. This lowers the
“Squelch Gate” so that everything gets through – noise, weak
signals, medium signals and strong signals.
5. Turn
SQUELCH
back counter-clockwise just until the hiss stops.
Now the “Squelch Gate” allows only clear signals through.
Note: For Trunk Scanning
, a good squelch setting is critical. The
recommended setting is midpoint. If you set the squelch too
high, the scanner might not reliably stop on the control
channel.
19
STRONG SIGNALS
MEDIUM SIGNALS
WEAK SIGNALS
NOISE
STRONG SIGNALS
MEDIUM SIGNALS
WEAK SIGNALS
NOISE
STRONG SIGNALS
MEDIUM SIGNALS
WEAK SIGNALS
NOISE
Summary of Contents for APCO25
Page 1: ......
Page 2: ......
Page 6: ......
Page 81: ...75 Memo ...
Page 82: ...Memo 76 ...
Page 83: ...Memo 77 ...
Page 84: ......