Configuring The Behavior Of The Hi/Shift And Lo/Width Controls (Ssb/Ssb-Data Only); Changing The Cutoff Frequency - Kenwood TS-890S Instruction Manual

Configuring the Behavior of the HI/SHIFT and LO/
WIDTH Controls (SSB/SSB-DATA Only)
The high cutoff/low cutoff selection in the SSB mode and Shift/
Width selection in the SSB-DATA mode are preconfigured in the
default setting, but they can be changed in the menu.
SSB Mode
Configure in Menu [6-11] "Filter Control in SSB
Mode (High/Low and Shift/Width)"
Setting Value High & Low Cut (default)/ Shift & Width
SSB-DATA Mode
Configure in Menu [6-12] "Filter Control in SSB-
DATA Mode (High/Low and Shift/Width)"
Setting Value High & Low Cut (default)/ Shift & Width

Changing the Cutoff Frequency

In the SSB, AM and FM modes, the passband width of the filter
can be altered by changing the cutoff frequency (low or high).
The passband width can be changed so that the interfering signal
falls outside the bandwidth of the filter.
Low Cutoff Frequency Range
Target Signal
Interfering
Signal
0 Hz 600 Hz 2 KHz
.
1 Press the mode key to select LSB, USB, FM or AM
mode.
2 Press and hold [IF FIL] to display the RX Filter
screen.
3 Turn the [HI/SHIFT] or [LO/WIDTH] control.
• Turning the [HI/SHIFT] control to the right increases the
cutoff frequency (high) while turning the control to the left
decreases the frequency.
• Turning the [LO/WIDTH] control to the right increases the
cutoff frequency (low) while turning the control to the left
decreases the frequency.
• The amount of change and the filter shape are displayed on
the filter scope and RX Filter screen.
.
4 Press and hold [IF FIL] or press [ESC] to end the
process.
High Cutoff Frequency Range
Interfering Signal
5 KHz
REJECTING INTERFERENCE 6
Low Cutoff Frequency
(Hz)
Mode
Setting Value
SSB/ SSB- 0/ 50/ 100 to 200 (default)
DATA to 2000 (100-step)
AM/ AM-
0/ 100 (default)/ 200/ 300
DATA
FM/ FM- 0/ 50/ 100 to 200 (default)
DATA to 1000 (100-step)
When configured to "Auto", a roofing filter with a
●
bandwidth wider than the passband width of the DSP
filter is selected using high cutoff/low cutoff or Width/
Shift.
When "Auto" is configured in the AM mode, a 6 kHz
●
roofing filter is automatically selected if the high cutoff
frequency is 3 kHz or lower, and a 15 kHz roofing filter is
selected if the high cutoff frequency is higher than 3 kHz.
In the FM mode, the option is fixed at 15 kHz and cannot
●
be changed.
When the low cutoff frequency is increased until it
●
reaches the high cutoff frequency, the high cutoff
frequency will also change at the same time while
keeping the passband width at 0 Hz.
When the high cutoff frequency is decreased until it
●
reaches the low cutoff frequency, the low cutoff
frequency will also change at the same time while
keeping the passband width at 0 Hz.
High Cutoff Frequency
(Hz)
Setting Value
600 to 2800 (default) to
3000 (100-step)/ 3400/
4000/ 5000
2000 to 3000 (100-step)/
3500/ 4000/ 5000 (default)
1000 to 2800 (default) to
3000 (100-step)/ 3400/
4000/ 5000
6-3