Chapter 9 Rejecting Interference; Dsp Filters; Changing The Dsp Filter Bandwidth; Ssb/ Fm/ Am Mode - Kenwood TS-590S Instruction Manual

REJECTING INTERFERENCE

DSP FILTERS

Kenwood digital signal processing (DSP) technology
is adapted to this transceiver. Using DSP filtering
(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 filters designed using
DSP technology. When in SSB, FM, or AM mode, you
can change the filter bandwidth by altering its low and/
or high cut-off frequency. For CW, FSK, and DATA
modes, you can change the filter bandwidth by directly
specifying a bandwidth. Changing the filter bandwidth
does not affect the current receive frequency.
• The meter display changes, based on the
bandwidth you are setting up.
■

SSB/ FM/ AM Mode

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.
38
Default
300 Hz
100 Hz
Default
2600 Hz
5000 Hz
High cut-off frequency
Interfering
signal
5 KHz
■

CW/ FSK Mode

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
■

Data Mode

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, 1800, 1900, 2000, 2100,
2210
■

IF Filter A and B

This transceiver has 2 built-in IF filters: 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.
• " " appears when IF filter setting A is selected
and " " appears when IF filter setting B is
selected.
After
Default
500 Hz
500 Hz
Default
800 Hz
Default
2500 Hz
Default
1500 Hz