•
Input both TX and
RX
frequencies
to
VFO
and
VFO
B.
VFO
A
FM
Zi
0 Zf
n n
n
L
J.
Jl
U U. U
vro
•
n 1
U
1
VFO
B
FM
ZI
o
ZI
n n n
C
J. L U
U.
LI
m B
n 1
U
1
Push the
SPLIT SWITCH.
FM
ZI
0
ZI
n n
n
L
J. J U U. U
SPT
VFO A
n 1
U
1
7-7
PASSBAND
TUNING
(PBT)
OPERATION
1)
After
installing the UT-30 in the transceiver,
push
the FM MODE
SWITCH and program
both the
transmit and
receive frequencies
into VFO
A
and
VFO
B, respectively.
2)
Push
the
SPLIT SWITCH
to
select
the
split (duplex)
operation.
3)
Select the transmit mode with either the T/R SWITCH or
the
PTT
SWITCH.
4)
Push
the FUNCTION
SWITCH
while transmitting. The red LED
lights
and
indicates
the programmed tone is being transmitted.
5)
Push the FUNCTION SWITCH again
to
cancel the tone.
NOTE: If no UT-30
is
installed, the FUNCTION INDICATOR
lights
but no
tone signal
is
transmitted.
Passband Tuning is
a
system
designed
to
electronically narrow
the
bandwidth
(selectivity) of
frequencies
that will pass
through the
receive crystal
filter.
1)
The
PBT CONTROL has a
detent at
the center
(12
o'clock)
position.
This position
provides
the
widest
bandwidth,
and the
control should
normally be
left here.
2)
The
PBT CONTROL
may
also be used to
adjust
the tone
of the
receive audio for
maximum
intelligibility.
3)
While
receiving in the LSB
mode,
narrow the
bandwidth by
turning the
PBT
CONTROL
counterclockwise to
eliminate
interference
from lower
frequencies
(interfering signals
are high
pitched).
Torn the
PBT CONTROL
clockwise to
eliminate
interference
from
higher frequencies
(interfering
signals are
low
pitched).
4)
While
receiving in the USB
mode,
the bandwidth is
reduced
in the
opposite
manner.
Narrow the
bandwidth by
turning
the
PBT
CONTROL
clockwise to
eliminate
interference from
higher
frequencies
(interfering
signals are
high pitched).
Turn the
PBT
CONTROL
counterclockwise to
eliminate
interference
from
lower
frequencies
(interfering signals
are low
pitched).
NOTE: The
passband
tuning
does
not
function when
the
trans-
ceiver is in
the AM or
FM mode.
Receiving
LSB signal
Turn PBT
CONTROL
cou
ntercl
ockwise
.
Receiving
LSB
signal
Turn
PBT
control
clockwise.
-
35
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