Kenwood TS-990S - Manual (Page 144)

6 REJECTING INTERFERENCE
6-6
Index Contents
CHANGING THE CUTOFF FREQUENCIES (LOW
AND HIGH FREQUENCY) TO ADJUST THE
PASSBAND WIDTH CHARACTERISTICS
In the SSB, AM, or FM mode, you can modify the
passband width of the filter by changing the cutoff
frequencies (low and high frequency).
You can change the passband width so that interference will
be outside the bandwidth of the filter.
Low Cut Frequency Range
Interfering
Signal
Target Signal
Interfering
Signal
High Cut Frequency Range
0 Hz 1 KHz 5 KHz
[ESC]
[FIL/SEL] (M) Mode keys
[HI/SHIFT]
[FIL/SEL] (S)
[LO/WIDTH]
1 Press one of mode keys to select LSB, USB, FM, or
AM 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) is activated.
3 Rotate either HI/SHIFT or LO/WIDTH control.
• Rotating the HI/SHIFT control clockwise increases the
high cutoff frequency and rotating it counterclockwise
decreases the high cutoff frequency.
• Rotating the LO/WIDTH control clockwise increases the
low cutoff frequency and rotating it counterclockwise
decreases the high cutoff frequency.
• The changes of the shift and filter type appear on the RX
Filter screen.
4 Press [ESC] to exit.
Pressing [FIL/SEL] (M) or [FIL/SEL] (S) closes the RX Filter
screen.
Note:
◆ You can view the progress of adjustments while the sub-scope
appears on the sub-screen.
Mode
Cutoff frequency (low) (Hz) Cutoff frequency (high) (Hz)
Range Default Range Default
LSB/USB/
FM
0, 50, 100, 200,
300, 400, 500,
600, 700, 800,
900, 1000
200
1000, 1200, 1400,
1600, 1800, 2000,
2200, 2400, 2600,
2800, 3000, 3400,
4000, 5000
2800
AM 0, 100, 200, 300 100
2500, 3000, 4000,
5000
5000