Icom IC-730 Instruction Manual page 14

The frequency range of each band is shown in the following
chart.
Band
3.5
7.0
10.0
14.0 13.900.0 ~ 14.599.9
18.0 17.900.0 ~ 18.599.9
21.0 20.900.0 ~ 21.599.9
24.0 24.400.0 ~ 25.099.9
28.0 27.900.0 ~ 28.599.9
28.5 28.400.0 ~ 29.099.9
29.0 28.900.0 ~ 29.599.9
29.5 29.400.0 ~ 29.999.9
5 - 1 - 3 TUNING RATE SWITCH
Pushing one of the Tuning Rate switches will change the
basic tuning rate of the set.
When pushed the 10Hz switch, the tuning rate becomes
10Hz. The 10Hz may be read from the increments on the
tuning knob.
When pushed the 100Hz switch, the tuning rate becomes
100Hz.
When pushed the 1K Hz switch, the tuning rate is changed to
correspond to 1K Hz steps. The last significant-digit on the
display will remain previous one. This position will allow you
to quickly OSY over a great frequency range.
5 - 1 - 4 DIAL LOCK BUTTON
After the IC-730 is set at a certain frequency for rag chew-
ing, mobile operation, etc., pushing the Dial Lock switch the
VFO is locked at the displayed frequency, thus inacti-
vating the operation of the tuning knob. To change the
frequency, the Dial Lock must first be disengaged by push-
ing and releasing the Dial Lock switch again.
5 - 1 - 5 VFO SWITCH
The CPU in the I C-730 contains two "VFO's" for both
receiving and transmitting. The VFO's are labeled "A" VFO
and "B" VFO and are selectable with the VFO Switch. This
dual VFO system gives the IC-730 many very con-
venient features. Please read this section very carefully and
perform the operation several times until you are com-
fortable with the system.
1. "A" VFO is for both transmitting and receiving and is
selected by placing the VFO switch in the "A" position.
The transmit and receive frequency will be controlled by
"A" VFO, displayed on the frequency readout, and
stored in "A" memory.
2. "B" VFO is for both transmitting and receiving and is
selected by placing the VFO switch in the "B" position.
The transmit and receive frequency will be controlled by
Frequency Range
3.400.0 ~ 4.099.9
6.900.0 ~ 7.599.9
9.900.0 ~ 10.599.9
"B" VFO, displayed on the frequency readout, and
stored in "B" memory.
EXAMPLE:
When the set is turned ON (7MHz and LSB are selected),
7.101.5 will be displayed on the readout.
This will occur whether the VFO switch is in either the "A"
or "B". Rotating the tuning knob clockwise will increase the
frequency in 100Hz (10Hz or 1KHz) steps. Rotating the
tuning knob counterclockwise will decrease the fre-
quency in 100Hz (10Hz or 1KHz) steps.

Switching from one VFO to the other VFO does
not clear the first VFO. The frequency is retained
in VFO's memory.
EXAMPLE:
If 14.125.0MHz is set with "A" VFO, and the VFO switch
is set to "N" VFO, the frequency readout will show "B"
VFO's frequency, but 14.125.0MHz is still stored in "A"
VFO's memory. Returning the VFO switch to "A" VFO
position, and 14.125.0 will be displayed on the readout.
Accordingly, if the switch is placed in the "B" VFO posi-
tion, the frequency that was set with the "B" 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 "A" and "B" VFO. It also allows you to search for
a clear frequency with one V FO, 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!
5 - 1 - 6 NORMAL/SPLIT SWITCH
Pushing the NO R MA L/SPLIT switch will change the rela-
tionshi p of the two VFO's. In the NOR (out) position, one
VFO is for both transmit and receive. In the SPT (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 and "B" VFO to 7.255.0MHz.
Return the VFO Switch to "A" VFO then set the NOR-
MAL/SPLIT Switch to the SPLIT position. 7.085.0MHz will
show on the readout during receive ("A" VFO) and
7.255.0MHz during transmit ("B" VFO). You are now
receiving on 7.085.0MHz and transmitting on 7.255.0MHz.
Setting the VFO switch to "B" VFO to reverses the above.
5 - 1 - 7 RIT (RECEIVE INCREMENTAL TUNING)
By using the RIT circuit, you can shift the receive fre-
quency ± 800Hz either side of the transmit frequency with-
out moving the transmit frequency itself. Therefore, when
you get a call slightly off frequency, or when the other
station's frequency has shifted, you can tune in the fre-
quency without disturbing the transmitting frequency. By
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