Kenwood TR-851A Instruction Manual page 21

4-5. SCAN
The following scan options are available:
* Program scan (''A'' or ''B'' is displayed during
VFO operation.)
@ Memory scan (AUTO mode is ON during memory
channel operation.)
* Memory channel mode scan (AUTO mode is OFF
during memory channel operation.)
4-5-1. Scan operation
(a) Scan stop conditions
The transceiver will stop on a busy channel dur-
ing normal scan operations. When an incoming
signal is detected during frequency scanning the
BUSY indicator will light. In order for this func-
tion to operate the SQL control must be adjusted
to the threshold point.
You may change the transceiver to stop on an
open channel rather than a busy channel.
Please see page 35 for the procedure.
(b) Scan indication
During frequency scanning, the MHz or kHz (for
50 Hz step) dot will blink.
{c) Scan direction
Scanning begins in the up direction and reverses
if the TUNING knob is turned counterclockwise
or the microphone's DWN switch is pressed.
(d) Frequency step in scan mode
In the program scan mode, frequencies are scan-
ned using the normal steps. in the SSB or CW
mode and when the F.STEP key ON frequencies
will be scanned in 1 kHz steps. (Refer to section
4-2-4.)
4-5-2. Programmable band-scan
During VFO operation, the scan frequency range is
determined by the frequency displayed and the fre-
quency stored in channel O as follows:
(a) In-range scan
If SCAN is initiated while the displayed frequen-
cy is between the limits specified in memory
channel 0, scan will proceed between these two
frequencies.
Lowest Receive frequency Transmut equency Highest
operating SCAN key: ON operating
frequency | | frequency
' 7 M be 3
7 t 1
! o>—__>
1 ae |
1 rates Ze !
= ih
' i t
' 2a, :
ee
| 1
When scanning down in frequency te: arrows in the diagram
paint ta the Iett
{b) Out-of-range scan
If SCAN is initiated while the displayed frequen-
cy is outside the range specified in memory
channel 0, scan will proceed outside the range
specified by these two frequencies.
SCAN key: ON
Lowest Highest
operating Receive frequency Transmit frequency operating
frequency 4 frequency
. — >
: ' ! 1 '
1 o—+L -- --~---~----- — 2-4
t ae '
1 AY at eS 1 '
se ee ae eee —
| tbs eon st ee eee ioe t
1 ase ee ' '
eee ee ee ee ee et
(c) All band scan
When the same transmit/receive frequency is
stored in memory channel O, the scan will pro-
ceed over the entire band.
Lowest Highest
operating Transmitirecewe frequency SCAN key: ON operating
frequency } frequency
t nae —1
t H t
: $—____.
We 88 @ NY FF oe ac eee '
W e s ode ee eee eS '
ict
U o oe er a eee weoco i
faint Se '
—
4-5-3. Memory scan
When the AUTO mode is ON, during memory chan-
nel operation, pressing the SCAN key will cause the
radio to scan the memory channels repeatedly, skip-
ping the channels that have no data stored.
4-5-4. Memory channel! mode scan
Select the desired mode and then initiate scan. Only
those channels with the specified mode will be scan-
ned.
4-5-5. Scan release
Press one of the following keys during scanning to
clear the scan mode:
(a} SCAN key
(b) PTT switch
(c} Others (except WMHz/M.CHA, NB,
FUNC, and VOICE keys)
LOW,
4-5-6. Scan hold
Scanning resumes about 6 seconds after stopping.
This is called TO (Time Operated) scan. It can be
changed to CO (Carrier Operated) scan, in which the
scan holds during signal reception and resumes
about 1.5 seconds after the input signal disappears.
Scanning will resume when the TUNING knob is
turned or the microphone UP/DWN switch is pressed
during scan hold.
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