Kenwood TS-590S User Manual - Page 46

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) Default SSB/ FM 0, 50, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000 300 Hz AM 0, 100, 200, 300 100 Hz 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) SSB/ FM 1000, 1200, 1400, 1600, 1800, 2000, 2200, 2400, 2600, 2800, 3000, 3400, 4000, 5000 AM 2500, 3000, 4000, 5000 Default 2600 Hz 5000 Hz Low cut-off frequency High cut-off frequency Interfering signal Desired signal Interfering signal 0 Hz 1 KHz 5 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 ■ 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 After Mode Bandwidth Selection (Hz) Default 50, 80, 100, 150, 200, 250, CW 300, 400, 500, 600, 1000, 1500, 2000, 2500 500 Hz FSK 250, 500, 1000, 1500 500 Hz 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 Default 800 Hz ■ 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) Default 50, 80, 100, 150, 200, 250, 300, 400, 500, 600, 1000, 1500, 2000, 2500 2500 Hz 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 Default 1500 Hz ■ 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.