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
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.
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.
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