I Split Frequency Operation - Icom IC-7400 Instruction Manual

I Split frequency operation

Split frequency operation allows you to transmit and
receive in the same mode on two different frequencies.
The split frequency operation is basically performed
using 2 frequencies in VFO A and VFO B.
The following is an example of setting 21.290 MHz for
receiving and 21.310 MHz for transmitting.
q Set 21.290 MHz (USB) in VFO A.
w Push [SPLIT] to turn the split function ON, then
push [A/B] for 1 sec.
• The equalized transmit (VFO B) frequency and "SPLIT"
appear on the LCD, and the [SPLIT] indicator lights.
e While pushing [XFC] rotate the tuning dial to set the
transmit frequency to 21.310 MHz.
• The transmit frequency can be monitored while pushing
[XFC].
r Now you can receive on 21.290 MHz and transmit
on 21.310 MHz.
To change the transmit and receive frequencies, push
[A/B] to exchange the VFO A and VFO B.
CONVENIENT
• Direct shift frequency input
The shift frequency can be entered directly.
q Push [F-INP].
w Enter the desired shift frequency with the digit
keys.
• 1 kHz to 1 MHz can be set.
• When you require a minus shift direction, push
[GENE • ] in advance.
e Push [SPLIT].
• The shift frequency is input in the sub readout and the
split function is turned ON.
[Example]
To transmit on 1 kHz higher frequency:
- Push [F-INP], [1.8 1] then [SPLIT].
To transmit on 3 kHz lower frequency:
- Push [F-INP], [GENE • ], [7 3] then [SPLIT].
• Split lock function
Accidentally releasing the [XFC] switch while rotating
the tuning dial changes the receive frequency. To pre-
vent this, use both the split lock and dial lock func-
tions to change the transmit frequency only. The split
lock function cancels the dial lock function while
pushing [XFC] during split frequency operation.
The dial lock's effectiveness during split frequency
operation can be selected in the set mode for both
receive and transmit frequencies; or only the receive
frequency. (p. 82)
FUNCTIONS FOR TRANSMIT
[SPLIT] Lights during split operation
[XFC]
Shows transmit (VFO B) frequency
• While pushing [XFC]
Shows shift frequency and direction
Shows transmit (VFO B) frequency
• After setting up
6
Tuning dial [A/B]
Appears
58