Kenwood TS-480HX Operation Manual - Page 57

Pre-amplifier, Attenuator, Cw Reverse Reception

Get Kenwood TS-480HX PDF manuals and user guides View all Kenwood TS-480HX manuals
Add to My Manuals
Save this manual to your list of manuals

Page 57 highlights

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. 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". 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. Frequency Bands (MHz) 0.03 ~ 2.5 Pre-amplifier (Default) OFF Attenuator (Default) OFF 2.5 ~ 4.1 OFF OFF 4.1 ~ 6.9 OFF OFF 6.9 ~ 7.5 OFF OFF 7.5 ~ 10.5 ON OFF 10.5 ~ 14.5 ON OFF 14.5 ~ 18.5 ON OFF 18.5 ~ 21.5 ON OFF 21.5 ~ 25.5 ON OFF 25.5 ~ 30.0 ON OFF 30.0 ~ 60.0 ON OFF 49

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
49
10
REJECTING INTERFERENCE
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.
s
d
n
a
B
y
c
n
e
u
q
e
r
F
)
z
H
M
(
r
e
i
f
i
l
p
m
a
-
e
r
P
)
t
l
u
a
f
e
D
(
r
o
t
a
u
n
e
t
t
A
)
t
l
u
a
f
e
D
(
5
.
2
~
3
0
.
0
F
F
O
F
F
O
1
.
4
~
5
.
2
F
F
O
F
F
O
9
.
6
~
1
.
4
F
F
O
F
F
O
5
.
7
~
9
.
6
F
F
O
F
F
O
5
.
0
1
~
5
.
7
N
O
F
F
O
5
.
4
1
~
5
.
0
1
N
O
F
F
O
5
.
8
1
~
5
.
4
1
N
O
F
F
O
5
.
1
2
~
5
.
8
1
N
O
F
F
O
5
.
5
2
~
5
.
1
2
N
O
F
F
O
0
.
0
3
~
5
.
5
2
N
O
F
F
O
0
.
0
6
~
0
.
0
3
N
O
F
F
O
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”.