Kenwood TS-990S - Manual (Page 152)

6 REJECTING INTERFERENCE
6-14
Index Contents
■ Adjusting the Noise Reduction Levels for the main
band
1 Rotate the NR1 or NR2 control to adjust the effect
level for the Noise Reduction 1 or the time constant for
Noise Reduction 2.
Rotating the NR1 or NR2 control clockwise suppresses
noise.
■ Adjusting the Noise Reduction Levels for the sub
band
1 Press and hold [NR1/SEL] or [NR2/SEL] to open the
Noise Reduction 1 (Sub) or Noise Reduction 2
(Sub) screen.
Noise Reduction 1
Noise Reduction 2
2 Press [-] (F4) or [+] (F5), or rotate the MULTI/CH
control to adjust the effect level for the Noise Reduction
1 or the time constant for Noise Reduction 2.
• Noise is suppressed more effectively if a larger value is
configured.
• The available range for Noise Reduction 1 is from "1"
to "10". The default is "5". The available range for Noise
Reduction 2 is from "2" to "20". The default is "20".
3 Press [ESC] to exit.
Pressing and holding [NR1/SEL] or [NR2/SEL] closes the
Noise Reduction 1 (Sub) or Noise Reduction 2 (Sub)
screen.
BEAT CANCELLER (SSB, AM AND FM)
The beat canceller performs digital processing at the AF
stage, thus making it possible to suppress a number of
periodic interference signals (beat signals) in the receive
bandwidth.
You can use the beat canceller for SSB, AM, and FM
modes.
Target Signal
Interfering Wave
(Beat)
[F1 F7]
[MENU]
[BC] (M) [BC] (S) Mode keys
1 Press one of the mode keys to select USB, FM, or AM
mode.
2 Press [BC] (M) or [BC] (S) to select the Beat
Canceller.
• Each time you press the key, the beat canceller for the
selected band cycles as follows: Off > BC1 > BC2 > Off
In the main screen, “BC1” appears above the frequency
display of the selected band with Beat Canceller 2 enabled.
• In the main screen, "BC2" appears above the frequency
display of the selected band if Beat Canceller 2 is active.
• If BC1 is configured, it suppresses weak or continuous
beat signals. If BC2 is configured, it suppresses intermittent
beat signals like CW signals.
Note:
◆ Beat Canceller can suppress the overall audible beat; however, the
gain of the target signal cannot be recovered by the AGC function.
Therefore, if the beat signal is larger than the target signal, use of
the manual notch filter, auto notch filter or band elimination filter
may activate the AGC function making the target signal clearly.