Tot (Time-Out Timer); Scanm (Scan Mode) - Baofeng UV-3R Mark II Reference

the immediate vicinity of a repeater station, there generally is no
reason to use the high power output in order to achieve full
quieting access to the repeater. With the transmit battery saver,
the automatic selection of Low Power operation conserves
battery drain significantly.
To activate the Transmit Battery Saver:
1) Press [ MENU/LOCK ] then rotate the [ DIAL ] knob to
MENU [14], SAVE
2) Press the [ U/V ] key to enter the set mode.
3) Clockwise or counterclockwise rotation of [ DIAL ] knob to
select the SAVE: ON/OFF
4) Press the [ U/V ] key to save the setting.
5) Press [ MENU/LOCK ] or [ PTT ] to EXIT to normal
operation.

TOT (Time-out Timer)

The TOT Feature provides a safety switch, which limits
transmission time to a preprogrammed value. The TOT default
is 180 seconds.
1) Press [ MENU/LOCK ] then rotate the [ DIAL ] knob to
MENU [15], TOT.
2) Press the [ U/V ] key to enter the set mode.
3) Clockwise or counterclockwise rotation of [ DIAL ] knob to
select the TOT: OFF/30S/60S/90S/120S/150S/180S
4) Press the [ U/V ] key to save the setting.
5) Press [ MENU/LOCK ] or [ PTT ] to EXIT to normal
operation.

SCANM (Scan Mode)

The UV-3R allows you to scan the memory channels, an entire
operating band, or a portion of that band. It will halt on signals
encountered, so you can talk to the station on that frequency, if
you like. To select the scanning mode, please see below:
1) Press [ MENU/LOCK ] then rotate the [ DIAL ] knob to
MENU [16], SCANM
10 June 20, 2012