Tot Feature; Saving The Battery During Reception - Yaesu FTA-850L Operating Manual

 If "ON" is displayed in the right hand of "Dual
Watch", the FTA-850L are performing the dual
watch.
The display will return to the previous screen and
" icon, which indicates that the FTA-850L
the "
are performing the dual watch, will appear on the
display.
 When the radio encounters a signal in the current
channel, it still polls both channels alternately with
longer staying time on the current channel.
 When the radio encounters a signal in the priority
channel, the radio stays on the priority channel until
the signal disappears, and the frequency indication
on the display blinks.
After the signal disappears, the dual watch re-
sumes.
 To stop the dual watch, select "Dual Watch" and
press the [ ENT ] key in the COMM Func menu.

TOT Feature

The TOT (time-out timer) shuts off the transceiver after
continuous transmission exceeds the programmed
time. This feature prevents unintended transmission
by mistake and reduces battery consumption.
To select the TOT, select either of "1min", "2min",
"3min", "4min", "5min" on the item "TX TOT" of the
COMM Setup menu in the SETUP mode.

Saving the Battery during Reception

One of the important features of the FTA-850L are
its battery saver, which "puts the radio to sleep" for
a time interval, periodically "waking it up" to check
for activity. If somebody is talking on the channel,
the FTA-850L will remain in the "awake" mode, then
resume its "sleep" cycles. This feature significantly
reduces quiescent battery drain.
To activate the battery saver, select one of the follow-
ing interval time ratios on the item "Battery Save" of
the Config menu in the SETUP mode.
50% ... Sleeps for 100 ms after 100 ms awake
70% ... Sleeps for 250 ms after 100 ms awake
80% ... Sleeps for 450 ms after 100 ms awake
90% ... Sleeps for 900 ms after 100 ms awake
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