Kenwood TS-680S Instruction Manual page 17

4-2-3. Receiving
POWER switch : OFF (=)
RIT control : Center
iF SHIFT control : Center
SQL control :
Fully counterclockwise
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AF gain control :
Fully counterclockwise
OFF (m@! | OFF( a!
REC (a) stow, a)
Note:
All segments on the Display Panel and Indicators are
shown on for this explanation.
1. Preset the contrals as shown in the accompanying
illustration.
2. Turn on the DC power supply (Fixed station) and
then turn the transceiver's power switch ON. The
display panel will indicate as shown below.
use AVFO
runnAnn
ee
Note: — .-
if the display is not as shown reset the
microprocessor using the procedure in Section
4-4-2,
3. Select the desired mode using one of the MODE
keys.
4. Adjust the AF gain control for the desired volume.
5. Press the UP/DOWN switches to select the
desired frequency band.
6. Slowly rotate the TUNING knob until the desired
signal can be heard clearly.
4-2-4. Dual Digital VFO's
Operational convenience can be enhanced thru the
use of both VFO A and VFO B.
Two VFO's are provided to allow you to change fre-
quencies rapidly. You could set one VFO to the lower
tuning range and the other VFO to the upper tuning
limit. You can set either VFO to any frequency you
desire.
(ajJA=B key
Depressing this key causes the data contained in
the inactive VFO (the VFO that is not currently be-
ing displayed) to change to the same data contain-
ed in the active VFO (the one currently displayed).
Both the frequency, mode and antenna selection
are changed.
Pome RF GAIN
.
=i
control : MAX
mem) wm ee eo
NB LEVEL
control : Center
\
OFF(m)
For example:
VFO A is set at 7 MHz in LSB, and VFO B is
21 MHz in USB. VFO A is the active VFO (show
on the display}. Depressing the A=8 key will
cause VFO B to change to 7 MHz in LSB.
(b)A/B key
Allows selection of the desired active VFO. Each
time this key is depressed the active VFO will
alternate between VFO A and VFO B.
(c)SPLIT key
Allows the use of one VFO for transmit, and the
other for receive (Split Frequency operation).
For example:
VFO A is the active VFO, and VFO B is the inactive
VFO, Depressing the SPLIT key will cause the TS-
1405/6808 to receive on VFO A and transmit on
VFO B. The mode of reception and transmission
will follow the mode contained in the appropriate
VFO memory. It is possible to work cross band,
cross mode if desired.
To avoid confusion during contest, or pile-up
operations we recommend using VFO A for
receive and VFO B for trasmit.
4-2-5. Frequency Step
1. The frequency step is set automatically depending
on the mode that has been selected.
Frequency Step
.. Mode | USB/LSB/
| me CWICWN AM/FM
| Frequency step 10 Hz 100 Hz
One revolution
| of TUNING knob | 10 kHz 50 kHz
17