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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/ Shift & Width (default)
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.
.
5 KHz2 KHz600 Hz0 Hz
Interfering Signal
Target Signal
Interfering
Signal
High Cutoff Frequency Range
Low Cutoff Frequency Range
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.
Mode
Low Cutoff Frequency
(Hz)
High Cutoff Frequency
(Hz)
Setting Value Setting Value
SSB/ SSB-
DATA
0/ 50/ 100 to 200 (default)
to 2000 (100-step)
600 to 2800 (default) to
3000 (100-step)/ 3400/
4000/ 5000
AM/ AM-
DATA
0/ 100 (default)/ 200/ 300
2000 to 3000 (100-step)/
3500/ 4000/ 5000 (default)
FM/ FM-
DATA
0/ 50/ 100 to 200 (default)
to 1000 (100-step)
1000 to 2800 (default) to
3000 (100-step)/ 3400/
4000/ 5000
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.
REJECTING INTERFERENCE 6
6-3
89


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