Yaesu FT-891 Operating Manual
Also see for FT-891: Information for Customers OperatingOperating manualAdvance manualReference bookQuick manual
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21Advanced OperationFT-891 Operating ManualNotch FilterThe DSP system’s Notch Filter may be helpful in removing one or more offending carrieror heterodyne signals from the audio passband.1. Rotate the MULTI knob, as needed, untilMulti Function Row “F-05 [SHIFT] [WIDTH][NOTCH]”.2. Press the [C](NOTCH) key to activate theNotch Filter. The “” icon will appear at the leftside of the “DNF” indication, and the “” nota-tion will appear at the top on the display. Youwill notice that the audio level of the carriersignal is now being reduced.3. Rotate the MULTI knob to adjust the “null” position of the Notch filter.4. Press the [C](DNF) key once more to turn the Notch Filter off. |
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