Kenwood TS-890S Operation Manual - Page 90

Changing the Passband Width and Shift Amount

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.. 6 REJECTING INTERFERENCE Changing the Passband Width and Shift Amount When in the CW or SSB-DATA mode, the passband width and shift amount of the DSP filter can be altered. When in the RTTY (FSK) or PSK mode, the passband width can be changed. The passband width can be changed so that the interfering signal falls outside the bandwidth of the filter. Target Signal Interfering Signal Interfering Signal 1 Press the mode key to select CW, USB-DATA, LSBDATA, FSK or PSK mode. 2 Press and hold [IF FIL] to display the RX Filter screen. 3 Turn the [LO/WIDTH] control to change the passband width. Turning the control to the right widens the passband width, while turning to the left narrows it. 4 Turn the [HIGH/SHIFT] control to shift the frequency band. Turning the control to the right shifts the frequency to the high bandwidth, while turning to the left shifts it to the low bandwidth. • The shift frequency band cannot be adjusted in the FSK and PSK modes. • The amount of change and the filter shape are displayed on the filter scope and RX Filter screen. Mode SSB/ SSBDATA CW FSK PSK Passband Width (Hz) Shift Frequency (Hz) Setting Value Setting Value Step 50/ 80/ 100/ 150/ 200/ 250/ 300/ 350/ 400/ 450/ 500/ 600/ 700/ 800/ 900/ 1000/ 1100/ 1200/ 1300/ 1400/ 1500/ 1600/ 1700/ 1800/ 1900/ 2000/ 50 to 1500 (default) to 2500 50 2100/ 2200/ 2300/ 2400/ 2500/ 2600 (default)/ 2700/ 2800/ 2900/ 3000 50/ 80/ 100/ 150/ 200/ 250/ 300/ 350/ 400/ 450/ 500 (default)/ 600/ 700/ 800/ 900/ -800 to 0 (default) to +800 10 1000/ 1500/ 2000/ 2500 250/ 300/ 350/ 400/ 450/ 500 (default)/ - 1000/ 1500 50/ 80/ 100/ 150/ 200/ 250/ 300/ 350/ 400/ 450/ 500 (default)/ 600/ 700/ 800/ 900/ 1000/ 1200/ 1400/ - 1500/ 1600/ 1800/ 2000/ 2200/ 2400/ 2600/ 2800/ 3000 5 Press and hold [IF FIL] or press [ESC] to end the process. 6-4

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Changing the Passband Width and Shift Amount
When in the CW or SSB-DATA mode, the passband width and shift
amount of the DSP filter can be altered. When in the RTTY (FSK)
or PSK mode, the passband width can be changed. The passband
width can be changed so that the interfering signal falls outside the
bandwidth of the filter.
Interfering Signal
Interfering
Signal
Target Signal
1
Press the mode key to select CW, USB-DATA, LSB-
DATA, FSK or PSK mode.
2
Press and hold [IF FIL] to display the RX Filter
screen.
3
Turn the [LO/WIDTH] control to change the
passband width.
Turning the control to the right widens the passband width,
while turning to the left narrows it.
4
Turn the [HIGH/SHIFT] control to shift the frequency
band.
Turning the control to the right shifts the frequency to the high
bandwidth, while turning to the left shifts it to the low bandwidth.
•
The shift frequency band cannot be adjusted in the FSK and
PSK modes.
•
The amount of change and the filter shape are displayed on
the filter scope and RX Filter screen.
Mode
Passband Width (Hz)
Shift Frequency (Hz)
Setting Value
Setting Value
Step
SSB/ SSB-
DATA
50/ 80/ 100/ 150/ 200/
250/ 300/ 350/ 400/
450/ 500/ 600/ 700/
800/ 900/ 1000/ 1100/
1200/ 1300/ 1400/
1500/ 1600/ 1700/
1800/ 1900/ 2000/
2100/ 2200/ 2300/
2400/ 2500/ 2600
(default)/ 2700/ 2800/
2900/ 3000
50 to 1500 (default) to
2500
50
CW
50/ 80/ 100/ 150/ 200/
250/ 300/ 350/ 400/
450/ 500 (default)/
600/ 700/ 800/ 900/
1000/ 1500/ 2000/
2500
-800 to 0 (default) to
+800
10
FSK
250/ 300/ 350/ 400/
450/ 500 (default)/
1000/ 1500
–
PSK
50/ 80/ 100/ 150/ 200/
250/ 300/ 350/ 400/
450/ 500 (default)/
600/ 700/ 800/ 900/
1000/ 1200/ 1400/
1500/ 1600/ 1800/
2000/ 2200/ 2400/
2600/ 2800/ 3000
–
5
Press and hold [IF FIL] or press [ESC] to end the
process.
6 REJECTING INTERFERENCE
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