Kenwood TS-890S Operation Manual - Page 89

Configuring the Behavior of the HI/SHIFT and LO/ WIDTH Controls (SSB/SSB-DATA Only) The high cutoff/low cutoff selection in the SSB mode and Shift/ Width selection in the SSB-DATA mode are preconfigured in the default setting, but they can be changed in the menu. SSB Mode Configure in Menu [6-11] "Filter Control in SSB Mode (High/Low and Shift/Width)" Setting Value High & Low Cut (default)/ Shift & Width SSB-DATA Mode Configure in Menu [6-12] "Filter Control in SSBDATA Mode (High/Low and Shift/Width)" Setting Value High & Low Cut/ Shift & Width (default) Changing the Cutoff Frequency In the SSB, AM and FM modes, the passband width of the filter can be altered by changing the cutoff frequency (low or high). The passband width can be changed so that the interfering signal falls outside the bandwidth of the filter. Low Cutoff Frequency Range High Cutoff Frequency Range Interfering Signal Target Signal Interfering Signal REJECTING INTERFERENCE 6 Mode SSB/ SSBDATA AM/ AMDATA FM/ FMDATA Low Cutoff Frequency (Hz) Setting Value 0/ 50/ 100 to 200 (default) to 2000 (100-step) 0/ 100 (default)/ 200/ 300 0/ 50/ 100 to 200 (default) to 1000 (100-step) High Cutoff Frequency (Hz) Setting Value 600 to 2800 (default) to 3000 (100-step)/ 3400/ 4000/ 5000 2000 to 3000 (100-step)/ 3500/ 4000/ 5000 (default) 1000 to 2800 (default) to 3000 (100-step)/ 3400/ 4000/ 5000 ● When configured to "Auto", a roofing filter with a bandwidth wider than the passband width of the DSP filter is selected using high cutoff/low cutoff or Width/ Shift. ● When "Auto" is configured in the AM mode, a 6 kHz roofing filter is automatically selected if the high cutoff frequency is 3 kHz or lower, and a 15 kHz roofing filter is selected if the high cutoff frequency is higher than 3 kHz. ● In the FM mode, the option is fixed at 15 kHz and cannot be changed. ● When the low cutoff frequency is increased until it reaches the high cutoff frequency, the high cutoff frequency will also change at the same time while keeping the passband width at 0 Hz. ● When the high cutoff frequency is decreased until it reaches the low cutoff frequency, the low cutoff frequency will also change at the same time while keeping the passband width at 0 Hz. 0 Hz 600 Hz 2 KHz 5 KHz 1 Press the mode key to select LSB, USB, FM or AM mode. 2 Press and hold [IF FIL] to display the RX Filter screen. 3 Turn the [HI/SHIFT] or [LO/WIDTH] control. • Turning the [HI/SHIFT] control to the right increases the cutoff frequency (high) while turning the control to the left decreases the frequency. • Turning the [LO/WIDTH] control to the right increases the cutoff frequency (low) while turning the control to the left decreases the frequency. • The amount of change and the filter shape are displayed on the filter scope and RX Filter screen. .. 4 Press and hold [IF FIL] or press [ESC] to end the process. 6-3