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®PASSBAND
TUNING
CONTROL
PBT
-g>-
NOTCH
^^TX
SWITCH
JTX
®RIT/zlTX
CLEAR
SWITCH
CL
B1
This control allows
continuous tuning
of the
receiver selectivity
when
using
the
SSB,
CW
or
RTTY
mode.
Besides reducing
inter-
ference
on
the
desired
signal,
PASSBAND TUNING
may
also
improve
the
receive
audio.
The
normal
position
is
in
the center
(1
2
o'clock)
which
sets
filter
bandwidth
at
2.3kHz on
SSB.
Refer to
SECTION
7
-
7
for
more
information.
This switch turns the
variable receive
frequency
circuit
ON
and
OFF.
When
the
circuit
is
activated,
the
letters
"RIT"
on
the front panel
illuminate
and
the
amount
of
shift
is
indicated.
The amount
and
direction
of
frequency
shift
is
retained
in
memory
whether
the
circuit
is
ON
or
OFF
until
erased
with the
RIT/^TX
CLEAR
SWITCH.
Refer to the description for the
INCREMENTAL
TUN-
ING
CONTROL
and
also
SECTION
7
-
10
for
more
information.
This switch turns the
variable
transmit
frequency
circuit
ON
and
OFF.
When
the
circuit
is
activated,
the
letters
"AIX"
on
the front
panel illuminate
and
the
amount
of
shift
is
indicated.
The amount
and
direction of
frequency
shift
is
retained
in
memory
whether
the
circuit
is
ON
or
OFF
until
erased
with the RIT/idTX
CLEAR
SWITCH.
Refer to the description for the
INCREMENTAL
TUN-
ING
CONTROL
and
also
SECTION
7
-
10
for
more
information.
This switch
clears
the
memory
which
contains the
frequency
shift
information
as set
with the
INCREMENTAL TUNING
CONTROL
and
resets
the
small
incremental tuning
display to "0.0".
Push
the
FUNCTION SWITCH
first,
then
this
switch
in
order to
add
the
shifted
frequency
as
shown
on
the incremental tuning
display to
the
frequency
on
the
main
frequency
display.
The
incremental
tuning
display
resets
to "0.0".
Refer to
SECTION
7
-
10
for
more
information.
©FILTER
SWITCH
FILTER
©NOTCH
FILTER
SWITCH
NOTCH
I
@VFO
A/B
SWITCH
[A/Bl
This switch
selects a
different
combination
of the
second
IF
(9MHz)
filter
and
the
third IF
(455kHz)
filter
to vary the
overall selectivity
as
shown
in
the following
chart.
FILTER
SWITCH
SSB
CW/RTTY
CW/RTTY
NARROW
AM
FM
OUT
2.3kHz
500Hz
500/250HZ
8kHz
15kHz
IN
2.6kHz
2.3kHz
500/250HZ
3kHz
15kHz
Refer to
SECTION
7
-
9
for
more
information.
This switch controls the
notch
filter
circuit.
•
Notch
Filter
OFF:
Switch
OUT
•
Notch
Filter
ON:
Switch
IN
This switch
selects
either
VFO A
or
VFO
B
for
tuning purposes.
©VFO
EQUALIZING SWITCH
[A=B]
This switch
instantly
matches
the
frequency
and
mode
of operation
of the
two VFOs. The
display
does not change
when
this
switch
is
P
j
|
pushed,
however
confirmation
of the equalizing process
is
possible
^
1
by
pushing the
A/B
SWITCH
to
check
the
frequency
and
mode
of
the opposite
VFO.
VFO A
VFO
B
USB
VFO
A
VFO A
,
K
USB
/
u
J
/
n n
,
ILL
1
U.
LI
LI
1
VFO
A
USB
p
1.
3
S 0.0
0
1
VFO
B
1
^
VFO
B
Push
A=B
SWITCH.
USB
/
u
J
7
n n
r,
,
ILL
1
U.
LI
0
1
VFO
B
-
9
-
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