Tone Alert System - Kenwood TH-77A Instruction Manual

4-10. TONE ALERT SYSTEM
The Tone Alert function provides an audible alarm to
indicate when someone is transmitting on the
frequency you are monitoring. When the T.ALT
function is set, you will not hear voice communication.
When used in conjunction with the CTCSS function, this
would allow the transceiver to act similar to a private
paging system. During T.ALT operations, the Automatic
Power Off function is disabled.
1. Adjust each SQL control to the threshold point.
2. If you will be using the CTCSS function, select the
proper tone frequency and ensure the CTCSS
indicator is on the display.
. Press the F key, then the 4/T.ALT key. Both T.ALT
indicators light .
4. When a signal is present:
The T.ALT indicator flashes.
The BUSY indicator lights.
The transceiver will beep on and
off for approximately 5 seconds.
The passing time is counted up.
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5. The counting up time is displayed in minute.
maximum of 99 hours 59 minutes. The display is
rewritten by each new signal.
6. During time display the T.ALT
released by pressing PTT switch.
function can be
NOTE
1. When using CTCSS, the incoming signal must be
present for approximately 1 second for the T.ALT
to function properly.
2. If the DTSS function is used in conjunction with
the Tone Alert function, Tone Alert is activated
only when the same DTSS signal is received.
7. The T.ALT function can be released by pressing the F
key and the 4/T.ALT key again.
@Beep Sound Selection
Pressing and holding the SCAN key and turning on the
power switch will switch the BEEP sound alternately
between Pi Pi Pi and Pul Pul Pul.
NOTE
The Tuning control, PTT switch and all keys except
MONI, LAMP, and F are ineffective during T.ALT
operations.
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