REJECTING INTERFERENCE

DSP FILTERS

KENWOOD digital signal processing (DSP) technology is used for the functions described in this section. Using DSP filtering, the TS-2000 frees you from installing many analog filters for each operating mode. Additionally, you can control the bandwidth, cancel the multiple jamming beat, and reduce the noise level using DSP filtering technology.

CHANGING THE RECEIVE 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 and FSK modes, you can change the filter bandwidth by directly specifying a bandwidth. Changing the filter bandwidth does not affect the current receive frequency.

Note:

◆The receive filter bandwidth can be changed only on the main transceiver.

◆The IF DSP filter is not available in FM mode.

■SSB/ FM/ AM Modes

1 Select SSB, FM, or AM mode.

2Press [DISP].

• The current filter selection appears.

3Turn the LO/ WIDTH control clockwise to raise the low cut-off frequency, or counterclockwise to lower the low cut-off frequency.

LO/ WIDTH

f

f

Turn the HI/ SHIFT control clockwise to raise the high cut-off frequency, or counterclockwise to lower the high cut-off frequency.

HI/ SHIFT

f

f

Adjust

Frequency Selections (Hz)

 

 

0, 50, 100, 200, 300, 400,

LO/ WIDTH 500, 600, 700, 800, 900, 1000

1400, 1600, 1800, 2000,

HI/ SHIFT 2200, 2400, 2600, 2800, 3000, 3400, 4000, 5000

Mode

Default low-cut

Default high-cut

frequecy (Hz)

frequency (Hz)

 

SSB/ FM

300

2600

 

 

 

AM

100

5000

 

 

 

4To return the display to the current operating mode, press [DISP].

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.

◆When the Packet filter (Menu No. 50A) is ON, you cannot change the DSP filter bandwidth. Switch the Packet filter OFF to adjust the DSP filter bandwidth.

■CW/ FSK Modes

1 Press [CW/ FSK/ REV] to select CW or FSK mode.

2 Press [DISP].

• The current filter selection appears.

3Turn the LO/ WIDTH control clockwise to increase (wide) the bandwidth, or counterclockwise to decrease (narrow) the bandwidth.

 

Interfering

Desired

Interfering

 

 

signal

signal

signal

 

 

 

 

 

 

Mode

Bandwidth Selections (Hz)

Default

(Hz)

 

 

 

 

CW

50, 80, 100, 150, 200, 300, 400,

600

500, 600, 1000, 2000

 

FSK

250, 500, 1000, 1500

 

1500

 

 

 

 

 

4As for CW, you can further adjust the shift frequency for passband. Turn the HI/ SHIFT control to adjust the shift frequency from 400 to 1000 Hz in steps of 50 Hz. The default shift frequency is 800 Hz.

5To return the display to the current operating mode, press [DISP].

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