Menu Button

Pressing this button will sequentially select among the following features, Continuous Tone Coded Squelch System (tc), channel scan (SCan), button conformation tones (BP) and the keypad lock (LC). Each successive press of the button will advance the display to the next feature in order. If no buttons are pressed for 5 seconds, the unit will return to standby mode and the display will indicate the current channel. Pressing the PTT or Monitor button will also return to the standby mode.

Continuous Tone Coded Squelch System (CTCSS) This feature allows you to ignore transmissions from other units that are using the same channel. One of 38 privacy codes may be selected. The same code must also be selected on those transceivers with which you desire to communicate. Keep in mind, however, that this feature does not prevent others from listening to your transmissions.

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Audiovox FR140 owner manual