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Pre-Amplifier; Attenuator; Cw Reverse - Kenwood TS-480HX Instruction Manual

Hf/ 50 mhz all mode transceiver
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PRE-AMPLIFIER

Switching the pre-amplifier OFF may help reduce
interference from adjacent frequencies.
Press [ATT/PRE/ ANT1/2] to cycle through "ATT" /
"PRE" / "
" (OFF) then return to "ATT". Select
"PRE" to turn the pre-amplifier ON. When it is ON,
the signal is amplified approximately 12 dB.
•
"PRE" appears when the function is ON.
The ON/ OFF setting will be automatically stored in
the current band. Each time you select the same
band, the same setting will be automatically selected.
The frequency range of each band is provided in the
table under "ATTENUATOR".

ATTENUATOR

The Attenuator reduces the level of received signals.
This function is useful when there is strong
interference from adjacent frequencies.
Press [ATT/PRE/ ANT1/2] to cycle through "ATT" /
"PRE" / "
" (OFF) then return to "ATT". Select
"ATT" to activate the attenuator function. When it is
ON, the signal is attenuated approximately 12 dB.
•
"ATT" appears when the function is ON.
The ON/ OFF setting will be automatically stored in
the current band. Each time you select the same
frequency band, the attenuator setting will be
automatically recalled.
The frequency range of each band is shown below.
F
e r
u q
n e
y c
B
n a
s d
(
M
H
) z
0
0 .
3
~
2
5 .
2
5 .
~
4
1 .
4
1 .
~
6
9 .
6
9 .
~
7
5 .
7
5 .
~
1
0
5 .
1
0
5 .
~
1
4
5 .
1
4
5 .
~
1
8
5 .
1
8
5 .
~
2
1
5 .
2
1
5 .
~
2
5
5 .
2
5
5 .
~
3
0
0 .
3
0
0 .
~
6
0
0 .
P
e r
a -
m
l p
i f i
r e
t A
e t
u n
t a
r o
D (
f e
u a
) t l
D (
f e
u a
) t l
O
F
F
O
F
F
O
F
F
O
F
F
O
F
F
O
F
F
O
F
F
O
F
F
O
N
O
F
F
O
N
O
F
F
O
N
O
F
F
O
N
O
F
F
O
N
O
F
F
O
N
O
F
F
O
N
O
F
F
10 REJECTING INTERFERENCE
CW REVERSE (RECEPTION)
This function pivots the BFO from the default position
(USB) to another position (LSB) in CW mode. It is
sometimes effective to remove the interfering signals
from the IF passband by pivoting the BFO.
1 Press [MODE] until "CW" appears.
2 Press [MODE] (1 s).
•
"CW" changes to "CWR".
3 To recover the default BFO position, press
[MODE] (1 s) again.
•
"CWR" changes to "CW".
49
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