Radio Shack 20-164 - Manual (Page 8)

14
Installation
15
Installation
Note: The light remains on for a set time
after the last button is pressed.
To turn on the backlight:
1. Hold down LIGHT until the light turns on.
2. To turn off the backlight, press LIGHT.
To change the backlight mode:
1. Turn on the scanner. “Multi-system
Trunking Scanner” appears.
2. While “Multi-system Trunking
Scanner” appears, press LIGHT.
3. Press S or T to select a backlight mode
and duration (seconds).
Normal Keypress Ignore
3 K3 I3
5 K5 I5
10 K10 I10
20 K20 I20
4. Press ENT.
To change the display contrast:
1. Press MAN.
2. Press FUNC then 9.
3. Press S or T to select the contrast.
4. Press ENT.
Delay
Sometimes several seconds can pass between
transmissions. To avoid missing a reply, a
delay is automatically set for each channel.
The scanner pauses for 2 seconds after a
transmission stops before it resumes scanning
or searching.
To turn the delay on and off:
1. Press •/DELAY. “DLY” appears if the delay
is on.
2. To turn on the delay, press •/DELAY
again.
“dly” appears if the delay is off.
Squelch and Attenuator
The squelch and attenuator control the
scanner sensitivity. If you hear a hissing noise,
the scanner will remain on the current channel.
To set squelch:
1. Turn SQUELCH down (counterclockwise)
until you hear noise.
2. 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.
3. If noise starts breaking the squelch, turn
SQUELCH up to decrease the scanner’s
sensitivity. To hear weaker signals, turn
SQUELCH down to increase its sensitivity.
With the attenuator on, the scanner might not
receive weak signals, but immunity to adjacent
strong signals is improved.