Icom IC-725 Instruction Manual

5
BASIC
OPERATION
5-5
RIT/Af FUNCTION
By
using the
RIT
function, it is possible
to
shift the
receive
frequency up
to
±1
kHz on
10
Hz
steps without
moving
the
transmit
frequency.
This
is
useful
for fine tuning
stations
which
transmit
using
off frequency
or
for compensating
for
frequency
drift.
The
IC-725
has an
added
feature:
the RIT
shift
frequency
can
be
added to
the
displayed frequency.
1)
Push the
[RIT]
switch
to
activate
the
RIT
function.
•
"RIT" appears
on
the FUNCTION DISPLAY.
2)
Rotate the
RIT
control.
•
Clockwise
rotation Increases frequency
•
Counterclockwise
rotation
:
Decreases frequency
1
)
Set
the frequency and
mode
for
21.2500
MHz and USB
in VFO
A mode.
2)
Set
the frequency and
mode for
21.3600
MHz
and USB
in
VFO
B
mode.
3)
Push the
[VFO]
switch to
select VFO
A mode.
4)
Push the [SPLIT] switch.
5)
Push
either the PTT or [TRANSMIT] switch to transmit.
•
You are transmitting
on 21.3600
MHz
in
USB
mode
and receiving on 21.2500
MHz
in USB
mode.
6)
To
change
the transmit and
receive frequencies
in
the
split
operation,
push
the
[VFO] switch
to select
the
VFO
B
indicated.
3)
To
add
the RIT
shift frequency to the displayed fre-
quency,
push the
[FUNC] switch then push
the [RIT]
switch.
•
The displayed
frequency changes.
•
"RIT"
disappears.
4)
To
clear the
RIT shift
frequency, push
the [RIT]
switch.
•
"RIT"
disappears.
5-6
SPLIT
OPERATION
Split
operation
allows you to transmit and receive on two
different
frequencies.
The IC-725
provides split operation using either of the
following two
methods:
(1)
Using the
contents
of VFO
A
and VFO
B in
VFO
mode.
(2)
Using
memory channel 23
or
24
in MEMORY
mode.
(1)
USING VFO
A
AND B MODES
Split
operation is
possible using the contents of VFO
A
and
VFO B
in VFO mode.
Following is
an example for 21.2500
MHz
/
USB for receiv-
ing
and 21.3600
MHz
/
USB
for transmitting using split
operation.
VFO
A :
Displayed
frequency
for
receiving
USB
zi
i
z*c
n nn
vfoa
z*c
L
I.LUIU.UU
CO
VFO
B
:
Transmit frequency
USB
.r/
/
~/c n nn
VF
o B
z*i
L l.-IUU.UU
CO
(2)
USING
MEMORY
CHANNEL
23 OR
24
Memory
channels 23
and
24
can memorize both transmit
and
receive frequencies. This
is useful
for
selecting
the
most
often
used split
frequencies.
Following is
an example
for 21.2500
MHz
/
USB
for receiv-
ing and 21.3600
MHz
/
USB
for transmitting using
split
operation.
•
How
to
memorize split frequencies into
memory
channel
23
1)
Select VFO A
mode and
push
the
[UP] or [DOWN]
switch
to
select
memory channel 23.
2)
Push the [SPLIT]
switch.
•
"SPLIT" appears.
3)
Set
the
frequency and mode to
21.2500
MHz and USB
and
push the [MW]
switch to
memorize the
information.
4)
Push the [VFO]
switch
to
select
VFO B mode.
5)
Set
the
frequency and mode to
21.3600
MHz
and USB,
and push the
[MW] switch to
memorize
the
information.
•
How to
operate
the split
frequencies
1)
Push
the [MEMO]
switch to select
MEMORY
mode
and
push the
[UP]
or
[DOWN] switch to
select
memory
channel 23.
2)
Push the [SPLIT]
SWITCH.
•
"SPLIT" appears.
3)
Push either
the
PTT
or
[TRANSMIT]
switch to
transmit.
•
You are
transmitting on
21.3600
MHz
in USB
mode
and receiving
on 21.2500
MHz
in USB
mode.
4)
To
reverse the transmit
and
receive
frequencies,
follow
the steps
above for
memorizing
frequencies,
reversing
the VFOs.

Icom IC-725 Specifications

General

Brand	Icom
Model	IC-725
Category	Transceiver
Language	English