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. "В" VEO is Тог both transmitting (HAM bands only) апа
receiving and is selected
by placing the VFO switch in
the "В" position.
The transmit and receive frequency
will be controlled by "В" VFO, displayed on the fre-
quency readout, and stored іп "В" memory.
EXAMPLE:
When the set is turned ON, 7.100.0 will be displayed on the
readout.
This will occur whether the VFO switch is in either the "А"
or "В".
Rotating the tuning knob clockwise will increase
the frequency in 100Hz (10Hz) steps.
Rotating the tuning
'knob
counterclockwise
will
decrease
the
frequency
in
100Hz (10Н2) steps.
Ш Switching
from
one VFO
to the other VFO does not
clear the first VFO.
The frequency is retained іп МЕО"
memory.
EXAMPLE:
If 14.125.0МН2
is set with "A" VFO, and the VFO switch
is set to "В" VFO, the frequency readout will show "В"
МЕО5
frequency,
but 14.125.0МН2
is still stored in "А"
МЕО5
memory.
Returning the VFO switch to "А" VFO
position,
and
14.125.0 will be displayed
on the readout.
Accordingly,
if the switch is placed in the "В" VFO posi-
tion, the frequency that was set with the "В" VFO
will
appear.
This allows you to set a certain frequency with one
VFO, work up and down the band with the other VFO, and
periodically
check the set frequency simply by switching
between
"А" апа "В" VFO.
It also allows you to search
for a clear frequency with one VFO, while keeping your
operating
frequency on the other VFO.
When
you have
found
a clear frequency, switch
back to your operating
frequency,
inform
the station
you
are in contact
with of
the new frequency, and switch back.
It's that simple!
Ш The
!C-720A will perform this operation even оп two
different bands.
A frequency is set in either "А" or В"
VFO on one band, the VFO switch is set to the other
VFO,
and the band
set to any other band you wish to
work,
EXAMPLE:
Set "А" VFO то 14.255.0MHz.
Set the VFO switch to "В"
VFO.
Switch to the 21MHz band.
The frequency readout
will read 21.100.0MHz.
Operate anywhere you wish with
"В"
VFO.
When
you
want
to return to 14.255.0MHz,
switch back to "A" VFO.
The frequency readout will show
14.255.0MHz.
5-1-7
VFO
EQUALIZING
SWITCH
This switch allows either МЕО
to be brought to the exact
frequency
of the other VFO without turning the tuning
knob.
Therefore, it is very easy to make a few KHz split
transmit/receive frequencies.
EXAMPLE:
When "A" VFO is 14.255.5MHz апа "В" VFO is 21.355.0
MHz, pushing the VFO Equalizing switch, "В" МЕО" fre-
—14—
quency
becomes the same as "А" УҒО5
(14.255.5MHz).
Now the "A" МЕО
frequency is memorized
in the "В"
VFO, and you can operate anywhere with "А" VFO.
When
you
want
to return to the previous frequency
(14.255.5
MHz), switch back їо "B" VFO.
It's very easy.
Also, you
can make several KHz split frequency operation with "A"
VFO
and "В" VFO, іп a moment.
To reverse this (А the
same as B), push the Function Key first.
5-1-8
SIMPLEX/DUPLEX
(TRANSCEIVE/SPLIT)
Pushing the Simplex/Duplex
(Transceive/Split) switch will
change the relationship of the two VFO's.
In the SIMPLEX
(out) position, one VFO
is for both transmit and receive.
In the DUPLEX
(in) position, one VFO is for transmit and
the
other
is for receive, so that this will allow you
to
operate split transmit/receive frequencies on the same band.
EXAMPLE:
Set "A"
VFO
to 7.085.0MHz апа "В" VFO to 7.255.0
MHz.
Return the VFO Switch to "A" VFO then set the Simplex/
Duplex Switch to the Duplex position.
7.085.0MHz will
shown
on
the
readout
during
receive
("А"
VFO)
апа
7.255.ОМН2
during transmit
("В" VFO).
You are now
receiving on 7.085.ОМН2 and transmitting on 7.255.ОМН2.
Setting the VFO switch to "B" VFO to reverses the above.
5-1-9
HAM/GENERAL
COVER
SWITCH
This two position switch selects the range of frequencies to
be covered
by the Band Up/Down switches.
In the HAM
(out) position the frequencies available are those of the 9
amateur bands, between 1.8MHz and 28MHz.
In the general
coverage
mode
(in) the unit operates
as a receiver in the
range 0.1 to 30MHz with thirty 1MHz segments.
5-1-10
BAND
UP/DOWN
SWITCHES
These switches labeled UP and DOWN
increment the radio
one band at a time in the desired direction.
When in the
HAM
band mode
this switch will move the transceiver to
the next band with each push. When in the General Cover-
age mode the band changes up or down in 1MHz segments.
When the set reaches the highest band in either mode it will
automatically
return
to the lowest band, or vice versa, as
per the following charts.
In the GENERAL COVERAGE mode
DOWN:
15. 000. 0
UP: 15. 000. 0
l
|
14.000. 0
16. 000. 0
|
|
1.000.0
29.000. 0
}
+
0.000. 0
0.000. 0<--
|
l
29. 000. 125
1. 000. 0
|
| |
0.000. 0
29. 000. 0
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