Kenwood TH-55AT Series - Manual (Page 19)

The Tone Alert function will provide an audible “alarm" to
signal when someone is transmitting on the frequency you
are monitoring.
For proper tone alert system operation the squelch must be
set to the threshold point.
1. Press the T.ALT key. The T.ALT indicator will light.
2. When a signal is present:
The T.ALT indicator will flash.
The busy indicator will light.
The transceiver will beep ON and OFF for about 5
seconds.
3. The T.ALT function can be released by pressing the
T.ALT key again.
Note:-----------------------------------------------------------------------------------------
• The tuning control, PTT switch, and all the keys except MONI,
LAMP are not effective during the T.ALT operations.
• Turning on the power switch while the T.ALT function is on
may cause the BELL indicator to flicker.
If this happens, turn the T.ALT off, and then back on.
3-8 TONE ALERT SYSTEM
3-9 BATTERY SAVER
The transceiver provides a battery saver mode to conserve
on battery power.
The transceiver will activate the battery saver circuit 10
seconds after the last key operation with the squelch clos­
ed.
ON OFF ON OFF
Approx.
200 mS
Approx. 800 mS
20
The function will be released by key operation or when
squelch opens.
The function cannot operate during scan or tone frequency
selection.
Note:------------------------------------------------------------------------------------- —
It is possible that you might press the MONI switch during the OFF
period. Squelch would not open during this period.
3-10 AUTOMATIC POWER OFF
The transceiver also provides an Automatic Power OFF cir­
cuit.
The circuit action is described below^____________________
1. A 5 second audio confir­
mation alert will sound
after 59 minutes if no
signal has been received
and if you have not per­
formed any key operation. L
Off
* u
rnz C
U0 $
2. 1 minute after this alert signal the transceiver will shut
itself OFF except for enough power to show "po OFF"
in the LCD display.
Release
The function can be released by pressing the MONI key or
turning the Power switch OFF and back ON.
The function can not be activated during scan or Tone Alert
System operation.
Note:-----------------------------------------------------------------------------------------
To conserve battery life even more simply turn the transceiver
OFF when you are not using it.