MIDLAND GXT255 - Manual (Page 11)

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Call Tone : Your GXT255 can transmit a call tone for a fixed length of time. To send
a call tone, press the PTT twice rapidly. The TX icon will appear during transmitting
a call tone and tone can be heard on the speaker for confirmation.
Scan : Your GXT255 can scan all of the 22 channel to observe for any activity. To
enter the scan mode, press and hold the button for one second.
Press button again to exit the scan mode.
Your radio will rapidly scan each of the 22 channels and stop on any active channel.
When you press the PTT button to transmit on an active channel, the scanning function
will stop. To resume scanning, press and hold the button for one second.
Keypad Lock : To avoid accidentally changing the radio operation, press the
button for 3 seconds . The icon will appear on the display. When the is on the
LCD display the and button will be disabled. When locked, you will be able
to turn the radio off and on, monitor, transmit/receive, and send a call tone. To
unlock, press and hold the for 3 seconds.
Backlit LCD : Your GXT255 comes with a backlit LCD display to enable you to view
the setting in a dark environment. The backlighting can be turned on/off by pressing
the button. The backlighting will turn on for 5 seconds.