Kenwood TH-79A Instruction Manual page 51

- The default is "Lock".
4 Press [MENU] to exit.
BEEP TONE
1 Press [MENU].
2 Turn the ENC control to select "Beep" (15).
FULL DUPLEX
Full Duplex OFF Full Duplex ON
(No indicator) ("DUP")
Full Duplex with Feedback
Prevention ON
("DUP" blinking)
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