The CTCSS mode can be turned off by accessing the flashing subchannel num- ber CTCSS icon and using the Up or Down button to select 00 as the tone code frequency; then press monitor again.

NOTE: To communicate with other FRS units, they must be switched to the same channel and CTCSS subcode. To communicate with other FRS units that do not have subcodes, switch your unit to the same channel with the subcode set to 00.

The CTCSS subcodes do not prevent others from hearing your trans mission. This will only allow you to ignore all traffic on a given channel

not using the same subcode.

Roger Beep Tone

The Roger Beep is a beep tone sequence which is automatically transmitted whenever the PTT button is released. This alerts the receiving party that your transmission has been ended intentionally, provided that unit has an enabled Roter Beep funtion also. To enable the Roger Beep tone:

-Press the F button three times until the rb icon flashes and On or oF appears on the display.

-Then press the Up or Down button to set the function on.

-To disable the Roger Beep tone, proceed as before, except press the Up or Down button to set the function oF.

-Press the PTT button to confirm the on or off condition.

VOX Function

This feature enables you to have hands-free conversation. When using the internal microphone/speaker or external microphone/headset (purchased separately, Part Number ABM-6CF8), your voice or the signal is detected and the radio transmits and receives automatically.

To access the VOX function:

-Press the VOX button; the VOX icon appears on the display. NOTE: In the VOX mode, the sensitivity is automatically set.

-To exit the VOX mode, press the VOX button again; the VOX icon will disappear from the display.

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Audiovox FR548-2CH owner manual Roger Beep Tone, VOX Function