Bedienungsanleitung Kenwood TS-480SAT (Seite 54 von 104) (Englisch)

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10 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

using DSP filtering technology.

CHANGING THE DSP FILTER BANDWIDTH

For improving interference reduction capability, this

transceiver also provides the DSP filtering (AF) along

with IF filters. 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 and FSK

modes, you can change the filter bandwidth by

directly specifying a bandwidth. Changing the DSP

filter bandwidth (AF) does not affect the current

reception frequency.

■ SSB/ FM/ AM

1 Press [MODE] to select SSB, FM, or AM mode.

2 Press [FIL/ NAR].

• The current high-cut filter frequency for the

mode appears on the sub-display.

3 Turn the MULTI control clockwise to raise the

high cut-off frequency, or counterclockwise to

lower the high cut-off frequency.

MULTI

SHIFT

MULTI

SHIFT

4 Press [FIL/ NAR] again.

• The current low-cut filter frequency appears.

5 Turn the MULTI control clockwise to raise the

low cut-off frequency, or counterclockwise to

lower the low cut-off frequency.

6 To return to the normal operation, press

[FIL/ NAR] or [MTR/ CLR].

MULTI

SHIFT

MULTI

SHIFT

tsujdA edoM )zH(snoitceleSycneuqerF

/BSS

,0061,0041,0021,0001

,0042,0022,0002,0081

0043,0003,0082,0062

0005,0004,)tluafed(

,0004,)tluafed(0003,0052

0005

/BSS

,002,)tluafed(001,05,0

,007,006,005,004,003

0001,009,008

MA005,002,)tluafed(001,0

Note:

◆

The cut-off frequencies (LO) can be adjusted independently

for each operating mode. When you change the operating

mode, the previous setting is recalled for each operating

mode.

◆

When the DSP filter for data communication (Menu No. 45) is

ON, you cannot change the DSP filter bandwidth. Select

“oFF” to adjust the DSP filter bandwidth.

■ CW/ FSK

1 Press [MODE] to select CW or FSK mode.

2 Press [FIL/ NAR].

• The current DSP filter bandwidth (AF)

appears.

3 Turn the MULTI control clockwise to increase

(wider) the bandwidth, or counterclockwise to

decrease (narrower) the bandwidth.

Interfering

signal

Desired

signal

Interfering

signal

Pass band (AF)

edoM )zH(snoitceleShtdiwdnaB

tluafeD

)zH(

,004,003,002,051,001,08,05

0002,0001,006,005

006

KSF0051,0001,005,0520051

4 As for CW, you can further adjust the RX pitch

frequency. Access Menu No. 34 and turn the

MULTI control to adjust the RX pitch frequency

from 400 to 1000 Hz in steps of 50 Hz. The

default RX pitch frequency is 800 Hz {page 29}.

5 To return to the current operating mode, press

[MTR/ CLR] or [FIL/ NAR].

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