User`s guide

16 17
Turning on the Scanner
The squelch and attenuator control scanner
sensitivity. If squelch is set too low, the scanner may
stop on noise or silence.
Note: Make sure the scanner’s antenna is connected
before you turn it on.
1. Turn the SQUELCH knob to about mid-position.
2. Turn the VOLUME knob to turn on the radio.
3. Turn SQUELCH down (counterclockwise) until
you hear noise.
4. Turn SQUELCH up (clockwise) a little past where
the noise stops. The higher the squelch is set,
the stronger the signal required to break the
squelch.
Understanding the Display Icons
Your PRO-652 features a high contrast, backlit
Liquid Crystal Display (LCD).
The scanner uses the following top row of icons:
F
The Function Key ( FUNC) has been pressed.
This acts as a “Shift” key.
T
The scanner is currently receiving trunking
control channel data.
G
The attenuator is set for Global mode.
A
The attenuator is currently active.
S
The radio’s squelch circuit is open.
Signal meter indicating signal strength.
Indicate scan or search direction.
F
T
GA
S
Srch Limit ZD
FM 154.935000
154.00 155.00
FrL/O Mode Stor