Rejecting Interference; Dsp Filters; Changing The Dsp Filter Bandwidth; Ssb/ Fm/ Am Mode (High Cut/Low Cut) - Kenwood TS-590SG Instruction Manual

9 REJECTING INTERFERENCE

DSP FILTERS

KENWOOD digital signal processing (DSP)
technology is adapted to this transceiver. Using DSP
fi ltering (AF), you can control the bandwidth, cancel
the multiple jamming beat, and reduce the noise level.

CHANGING THE DSP FILTER BANDWIDTH

For improving interference reduction capability, this
transceiver also provides IF fi lters designed using
DSP technology. To change the passband of the fi lter,
you can use the method of changing the high and
low cut-off frequency (HI/LOW cut), or you can use
the method of changing the bandwidth and center
frequency (WIDTH/SHIFT). Changing the IF fi lter
does not affect the current receive frequency.
• The meter display changes, based on the
bandwidth you are setting up.
■

SSB/ FM/ AM Mode (High cut/Low cut)

1 Select SSB, FM, or AM mode.
2 Turn the LO/WIDTH control clockwise to raise
the low cut-off frequency, or counterclockwise to
lower the low cut-off frequency.
Mode Low cut Frequency (Hz)
SSB/ 0, 50, 100, 200, 300, 400,
FM 500, 600, 700, 800, 900, 1000
AM 0, 100, 200, 300
Turn the HI/SHIFT control clockwise to raise the
high cut-off frequency, or counterclockwise to
lower the high cut-off frequency.
Mode High cut Frequency (Hz)
1000, 1200, 1400, 1600,
SSB/ 1800, 2000, 2200, 2400,
FM 2600, 2800, 3000, 3400,
4000, 5000
AM 2500, 3000, 4000, 5000
Low cut-off frequency
Desired signal
Interfering
signal
0 Hz 1 KHz
Note: The cut-off frequencies can be adjusted
independently for each operating mode. When you change
the operating mode, the previous setting is recalled for each
operating mode.
40
Default
300 Hz
100 Hz
Default
2600 Hz
5000 Hz
High cut-off frequency
Interfering
signal
5 KHz
■

CW/ FSK Mode (Width/Shift)

1 Select CW or FSK mode.
2 Turn the LO/WIDTH control clockwise
to increase the bandwidth (wide), or
counterclockwise to decrease the bandwidth
(narrow).
Desired signal
Interfering
signal
Interfering
signal
Before
Mode Bandwidth Selection (Hz)
50, 80, 100, 150, 200, 250,
CW 300, 400, 500, 600, 1000,
1500, 2000, 2500
FSK 250, 500, 1000, 1500
3 As for CW, you can further adjust the shift
frequency for the pass band. Turn the
HI/SHIFT control clockwise to increase the
shift frequency (high), or counterclockwise to
decrease the shift frequency (low).
Shift Frequency (Hz)
300, 350, 400, 450, 500, 550, 600,
650, 700, 750, 800, 850, 900, 950,
1000
■

SSB Data Mode (Width/Shift)

1 Select Data mode (USB-DATA/LSB-DATA).
2 Turn the LO/WIDTH control clockwise
to increase the bandwidth (wide), or
counterclockwise to decrease the bandwidth
(narrow).
Bandwidth Selection (Hz)
50, 80, 100, 150, 200, 250, 300, 400,
500, 600, 1000, 1500, 2000, 2500
3 Turn the HI/SHIFT control clockwise to increase
the shift frequency (high), or counterclockwise
to decrease the shift frequency (low).
Shift Frequency (Hz)
1000, 1100, 1200, 1300, 1400, 1500,
1600, 1700, 1750, 1800, 1900, 2000,
2100, 2210
■

IF Filter A and B

This transceiver has 2 built-in IF fi lters: A and
B. The IF Filter settings are stored with the last
settings of the LO/WIDTH and HI/SHIFT controls.
Press [IF FIL] to toggle between IF Filter setting A
and B (each VFO A and VFO B).
• " " appears when IF fi lter setting A is selected
and " " appears when IF fi lter setting B is
selected.
After
Default
500 Hz
500 Hz
Default
800 Hz
Default
2500 Hz
Default
1500 Hz