Kenwood TH-77A Instruction Manual page 30

The radio is delivered from the factory in the Time
Operated Scan mode. To switch between the modes,
use the following procedure:
@Hold/Resume selection
NOTE
Main band scan stops by pressing the F key. So sub band
scan must be started before main band scan.
30
3. Scan begins in the upwards direction.
MAIN BAND;
You can reverse
Tuning control.
SUB BAND;
You can
reverse the
direction
by pressing
the
UP/DWN key.
The tuning step size
Frequency Step selection.
4. Scan
stops on a busy channel,
i.e. a station
strong
enough
to open squelch
and set the BUSY
indicator
on.
5. MAIN BAND;
Press the PTT switch or the SCAN key to stop scan.
SUB BAND;
Press the SCAN
/ SUB
key within
10 seconds of
pressing the F key to stop scan.
the direction by turning the
depends on the current
4-5-4. Programmable Band Scan
@Lower/Upper Scan Limit Selection
Select
the lower
(upper) scan limit
frequency of the
band on the display, then press the DWN
(UP) key after
pressing the M and F keys.
NOTE
When the lower
limit frequency
is not in the same
band , different
step size, or higher than the upper
limit frequency,
Programmable
Band scan
is not
initiated.