Changing The Passband Width And Shift To Adjust Passband Characteristics; Activating Audio Peak Filter For Use In Cw Mode - Kenwood TS-990S Instruction Manual

CHANGING THE PASSBAND WIDTH AND SHIFT
TO ADJUST PASSBAND CHARACTERISTICS
For use in CW or SSB-DATA mode, you can change the
passband width of the DSP filter and its amount of shift
from the center frequency. For use in RTTY (FSK) or
PSK mode, you can change the passband width. You can
change the pass bandwidth so that interference will be
outside the bandwidth of the filter.
Target Signal
Interfering Signal
[ESC]
Mode keys
1 Press a mode key to select CW, LSB-DATA, USB-
DATA, FSK, or PSK mode.
2 Press and hold [FIL/SEL] (M) or [FIL/SEL] (S) to open
the RX Filter screen.
The selected band and the mode name while receiving
appear, and the selected RX filter (A, B, or C) can be edited.
3 Rotate the LO/WIDTH control to change the pass band
width.
Rotating the control clockwise increases the passband width
and counterclockwise decreases the passband width.
4 Rotate the HI/SHIFT control.
Rotating the control clockwise shifts the frequency pass
bandwidth higher and counterclockwise shifts the frequency
pass bandwidth lower. The frequency range for use in FSK
and PSK mode cannot be adjusted.
5 Press [ESC] to exit.
Pressing [FIL/SEL] (M) or [FIL/SEL] (S) closes the RX Filter
screen.
Contents Index
Interfering Signal
[HI/SHIFT] [LO/WIDTH]
[FIL/SEL] (M) [FIL/SEL] (S)
Pass Bandwidth (Hz)
Mode
Range
50, 80, 100,
150, 200, 250,
CW 300, 400, 500,
600, 1000, 1500,
2000, 2500
50, 80, 100,
150, 200, 250,
300, 400, 500,
DATA
600, 1000, 1500,
2000, 2200, 2400,
2600, 2800, 13000
250, 300, 400,
FSK 500, 1000,
1500
50, 80, 100,
150, 200, 250,
PSK
300, 400, 500,
600, 1000, 1500
ACTIVATING AUDIO PEAK FILTER FOR USE IN
CW MODE
If the readability of a signal is affected by noise or any
other interference while receiving in CW mode, passing
the receive signal through a bandwidth centered on the
CW pitch frequency improves its readability.
[CW/CW-R]
1 Press [CW/CW-R] to select CW mode.
2 Press [APF/SEL] (M) or [APF/SEL] (S).
• Each time you press either one of the keys, the audio peak
filter for the selected band toggles between active and
inactive. While the audio peak filter is active, the "APF/SEL"
(M) or "APF/SEL" (S) LED lights green.
• The audio peak filter for the selected band is disabled by a
press of the same key.
REJECTING INTERFERENCE 6
Shift Frequency (Hz)
Default Range Default
-800, -750, -700,
-650, -600, -550,
-500, -450, -400,
-350, -300, -250,
-200,-150,-100,
500 -50, 0, 50, 100,
150, 200, 250,
300, 350, 400,
450, 500, 550,
600, 650, 700,
750, 800
1000, 1100, 1200,
1300, 1400, 1500,
2600 1600, 1700, 1800, 1500
1900, 2000, 2100,
2210
500 2210 only
1500 1500 only
[APF/SEL] (M) [APF/SEL] (S)
800
6-7