Kenwood TM-255A Instruction Manual page 36

Scan is a useful feature for hands-off monitoring of
your favorite frequencies. After becoming comfortable
with how to use all types of Scan, the monitoring
flexibility gained will increase your operating
efficiency.
This transceiver provides 3 types of Scan as follows:
Memory Scan | Quick activity update of your favorite
frequencies.
Program Scan ' | General update of activity on the entire
band or a sub-section of the band while
in VFO mode.
VFO/ Memory/ | Check the current VFO, Memory
Call Scan Recall, and Call channel frequencies in
rotation.
1 Program Scan has several variations available
{page 31}.
Note:
@ Remember to adjust the squelch threshold level {page 16}
before using Scan.
@ Always turn OFF Tone Alert and Page before using Scan.
@ For CTCSS operation, Scan stops and the squelch opens only
for signals that contain the same CTCSS tone that is stored in
your transceiver.
@ For DTSS operation, Scan stops for any signal received;
however, the squelch opens only for signals that contain the
same DTSS code that is stored in your transceiver.
@ When both CTCSS and DTSS are ON, Scan stops for signals
that contain the matching CTCSS tone. However, the squelch
opens only when the matching DTSS code is received.
BUSY-FREQUENCY STOP
When a signal is received while using Program Scan,
the transceiver automatically stops scanning when a
signal is detected if Busy-frequency Stop is ON. The
transceiver remains on the same frequency for either
a short time or until the signal drops depending on
which Scan Resume method is selected. The squelch
must be adjusted to the noise threshold point with no
signals present.
The Busy-frequency Stop function can be turned ON
or OFF via Menu A, No. 03 {page 13}. The default is
ON.
SCAN RESUME METHODS
Time-operated mode: Scan resumes approximately
6 seconds after stopping on a busy frequency
regardless if the signal is still present.
Carrier-operated mode: Scan does not resume until
approximately 2 seconds after the signal drops.
Select the Scan Resume method via Menu A, No. 04
{page 13}. The factory default is the Time-operated
mode (0).
Note: For Scan to stop, the SQL control must be set just beyond
the threshold where the background noise disappears when no
signal is present.
SCAN HOLD
Busy-frequency Stop is useful primarily when
operating in a full-carrier mode such as FM. An
alternative to Busy-frequency Stop that works
especially well for SSB or CW is Scan Hold. Scan
Hold only stops the transceiver from scanning when
you turn the Main Tuning control, turn the
Alternate Tuning control, or press microphone
[UP]/[DWN]. Scan stops on the current frequency
and resumes a short time later.
Enable Scan Hold via Menu B, No. 56 {page 14}. The
default is OFF.
Note: Busy-frequency Stop must be turned OFF to use Scan
Hold.
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