4 RECEIVE AND TRANSMIT
DAPF (Audio Peak Filter) operationAPF/TPF
The APF changes the audio frequency response by boosting a particular frequency to enhance a desired CW signal.
The peak frequency can be adjusted with
The audio filter shape is also selectable from “SOFT” and “SHARP” in Others set mode (p.
qDuring CW mode, push APF/TPF to turn the audio peak filter ON and OFF.
•“ APF ” appears in the display and [APF/TPF] indicator above this switch lights green.
wPush and hold APF/TPF for 1 sec. several times to select the desired audio filter width.
•WIDE, MID and NAR filters, or, 320, 160 and 80 Hz fil- ters are available depending on APF type setting in level set mode.
eIf “APF” is selected for