Icom IC-751A - Split (Duplex) Operation; Fm Repeater Operation

SWITCH/CONTROL POSITION
MODE
CW or
CW NARROW
VOX
ON (IN)
KEY SPEED
12
O'CLOCK
VOX
DELAY
10
O'CLOCK
TRANSMIT/RECEIVE
RECEIVE
•
FIH.L
BREAK-IN
OPERATION
WITH
AUTOMATIC
KEYING USING
AN
IAMBIC PADDLE
7-5
SPLIT (DUPLEX)
OPERATION
(Example)
Receiving:
7.057MHz/CW
Transmitting:
7.255MHz/LSB
Receiving
(VFO
A)
CW
/
n
C
1 n
1
.
u J
1. LI LI
1
SPI
VFO A
Transmitting
(VFO B)
\7
LSB
7
.? 5S.C!
n
1
LI
1
SPI
VFO B
7-6
FM
REPEATER
OPERATION
2)
Adjust the
KEY
SPEED
CONTROL for
a suitable keying
speed.
3)
Set
the transmit
release
delay
time to suit your
keying
speed by
adjusting the VOX
DELAY
CONTROL
while keying.
RotatS
the control
clockwise
to increase the
delay.
4)
The
transmit/receive switching
is
automatically
performed by
the
transceiver.
1
)
Set
the switches
and
controls
as
shown
in the table.
SWITCH/CONTROL
POSITION
MODE
CW or
CW NARROW
VOX
ON (IN)
KEY
SPEED 12
O'CLOCK
VOX
DELAY
FULL
(MAX.
COUNTERCLOCKWISE)
TRANSMIT/RECEIVE
RECEIVE
2)
Adjust the
KEY
SPEED
CONTROL for
a
suitable keying speed.
3)
The
transmit/receive switching
is
automatically
performed
by the
transceiver.
The
purpose
of
the
split function is
to
allow an
operator the option
of
transmitting
on
a
frequency different from the
receive frequency.
Push the
SPLIT
SWITCH
to
turn the
function
ON
or OFF.
1
)
Store
the
frequency
7.057MHz
in
VFO
A
and
7.255MHz
IN
VFO
B.
2)
Push
the VFO
A/B SWITCH to
select VFO A,
then push the
SPLIT
SWITCH to
select
the
split function.
The letters
"SPT" on
the
display
illuminate.
3)
The receive
frequency is
now set for
7.057MHz
and
the transmit
frequency is
7.255MHz. Push the
VFO A/B SWITCH
once
again
in
order
to
receive on
7.255MHz and transmit
on
7.057MHz.
Each
VFO also stores
the
operating mode
in addition to
the operat-
ing
frequency.
This allows
crossmode
contacts to
be made
easily.
A
tone encoder
is
often
required
to
access
HF
FM repeaters.
The
UT-30
PROGRAMMABLE
TONE
ENCODER
is available as
an
accessory
for use
with the IC-751
A.
Refer to
SECTION 10
-
5
for
installation
instructions.
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34
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