Kenwood TS-2000X, TS-B2000 Rejecting Interference, DSP Filters, SSB/ FM/ AM Modes, CW/ FSK Modes

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/ SEL].

• 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/ SEL].

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/ SEL].

• 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/ SEL].

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