Split Frequency Operation - Icom IC-7851 Instruction Manual

■ Split frequency operation

Split frequency operation allows you to transmit and
receive in the same mode on two different frequencies.
Split frequency operation uses one frequency on the
Main band and another on the Sub band.
The following is an example of using 21.290 MHz for
receiving and 21.310 MHz for transmitting.
q
Set 21.290 MHz (USB) in the
w
Push [SPLIT] momentarily, then hold down [M=S]
for 1 second.
• The Quick split function is much more convenient for se-
lecting the transmit frequency. See
• The equalized frequencies and "
played.
• The [SPLIT] indicator lights white.
• The "
" icon indicates the transmit frequency.
TX
Set the transmit frequency to 21.310 MHz in one of
following ways.
➥
Rotate [MAIN DIAL] while holding down [XFC].
➥
Rotate the [SUB DIAL].
• The transmit frequency can be monitored while hold-
ing down [XFC] or using Dualwatch.
r
Now you can receive on 21.290 MHz and transmit
on 21.310 MHz.
To reverse the transmit and receive frequencies, push
[CHANGE] to exchange the Main and Sub band fre-
quencies.
✔ CONVENIENT
• Direct shift frequency input
The shift frequency can be directly entered.
q
Push [F-INP].
w Enter the desired shift frequency by pushing [0] to
[9].
• 0.001 MHz (1 kHz) ~ 9.999 MHz can be set.
• To enter a minus shift direction, first push [•].
e
Push [SPLIT].
• The shift frequency is entered in the Sub band and the
Split function is turned ON.
[Example]
To transmit on a 1 kHz higher frequency:
- Push [F-INP], [1], and then push [SPLIT].
To transmit on a 3 kHz lower frequency:
- Push [F-INP], [•], [3], and then push [SPLIT].
• Split lock function
Accidentally releasing [XFC] while rotating [MAIN
DIAL] changes the receive frequency. To prevent this,
use both the Split lock and Dial lock functions to change
only the transmit frequency. The Split lock function dis-
ables the Dial lock function while holding down [XFC]
in the Split mode.
The Dial lock's action in the Split mode can be select-
ed in the Others set screen for both the receive and
transmit frequencies, or only the receive frequency.
(p. 15-14)
Main band.
page 8-8 for details.
" are dis-
SPLIT
8-7
FUNCTIONS FOR TRANSMIT
[SPLIT] indicator
[M=S]
• When the Split function ON
• When [XFC] is pushed
• You are ready for Split frequency operation
[XFC] 10-keys
[CHANGE]
[SUB DIAL]
[MAIN DIAL] [SPLIT]
8