12
Traffic Safety
Do not wear an earphone or head-
phones while operating a motor vehi-
cle. This can create a traffic hazard
and can be illegal in some areas.
Even though some earphones and
headphones let you hear some out-
side sounds when listening at normal
volume levels, they still can present a
traffic hazard.
CONNECTING AN
AMPLIFIED EXTENSION
SPEAKER
In a noisy area, an amplified extension
speaker might provide more comfort-
able listening. Plug the speaker ca-
ble’s
1
/
8
-inch (3.5 mm) mini plug into
the scanner’s jack. This discon-
nects the internal speaker.
Note: RadioShack stores sell an am-
plified communications extension
speaker.
INSTALLING AN
OPTIONAL CTCSS
TONE BOARD
The scanner’s CTCSS (Continuous
Tone Control Squelch System) feature
lets you choose to listen only to trans-
missions that transmit one of 38 stan-
dard CTCSS tones. To use CTCSS,
you must install an optional CTCSS
tone board (Cat. No. 20-0031).
Cautions:
• Make sure the scanner is off and
disconnect the power before you
install a CTCSS tone board.
• Discharge static electricity buildup
by touching a metal object before
you open the scanner.
1. Use a Phillips screwdriver to
remove the two side screws on
the scanner’s top cover and three
screws on the bottom.
Caution: The scanner’s speaker
is attached to the top cover and
the circuit board. Use care when
you remove the top cover to not
damage the speaker or its con-
nector.
20-418.fm Page 12 Wednesday, August 4, 1999 12:42 PM
