Kenwood TM-733A Instruction Manual page 46

TIME-OUT TIMER (TOT)
It is sometimes necessary or desirable to restrict a
single transmission to a specific maximum time. This
feature can be useful when accessing repeaters to
prevent repeater time-outs, or when particularly trying
to conserve battery power. Activate TOT anytime you
wish to limit your transmit time.
1 Press [F] (1s), [TOT].
* The current TOT selection appears.
2 Turn the Tuning control, or press microphone
[UP]/[DWN], to select the desired timer value.
+ The available selections are "OFF", "3", "5", "10",
"20", and "30" minutes. The default is "OFF".
3 Press [MHz] or microphone [PTT] to return to the
previous mode.
+ Any Front Panel button, microphone button, or
switch can be used in this step except
microphone [UP]/[DWN] and the microphone
DTMF keypad keys. It's not advisable to use
[BAND SEL], [CONT SEL], or [PWR] because
they will also perform their own functions.
+ "TOT" remains visible on the Display.
When TOT times out, the transceiver automatically
returns to Receive. To resume transmitting, release
and then press [PTT] again.
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