Radio Shack 20-164 User Manual

10
11
Keytones and Keylock
The scanner sounds a tone each time you press
a key. To prevent accidental changes, you can
lock the keypad.
To set the keytone:
1. Turn on the scanner. “Multi-system Trunking
Scanner” appears.
2. While “Multi-system Trunking Scanner”
appears, press 1 to turn on the keytone or 2
to turn it off.
To lock the keypad:
1. Press FUNC then KEY/LIGHT. “Key locked”
appears briey and the keypad is locked.
When locked, the only controls that operate
are FUNC, LIGHT/KEY, SQ, and VOL.
2. To unlock the keypad, press FUNC then
KEY/LIGHT again. “Key unlocked” appears.
Backlight and Contrast
Your scanner features a backlit keypad and
display for easy viewing. You can select from
three backlight modes:
Normal – Press LIGHT to activate the backlight.
Keypress – Press any key on the keypad to
activate the backlight.
Ignore – Keypress mode, but the scanner
ignores the function of the rst key pressed to
activate the backlight.
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  or  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  or  to select the contrast.
4. Press ENT.
Squelch and Attenuator
The squelch and attenuator help you control
your scanner’s sensitivity. If you hear a hissing
sound, the scanner will remain on an active
channel, even after a disconnect tone or a
stopped transmission.

Radio Shack 20-164 Specifications

General

Brand	Radio Shack
Model	20-164
Category	Scanner
Language	English