Audio Peak Filter - Yaesu FT-991 Operating Manual

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1. Press the F(MLIST) button to reveal the functions
list on the TFT LCD display.
2. Touch [ APF ] on the LCD. The APF function will be
set to "ON".
APF indicator
APF level indicator
3. Rotate the MULTI knob to set the sound volume to a
comfortable level.
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 The APF bandwidth can be selected from NAR-
ROW/MEDIUM/WIDE via the Menu item "113
APF WIDTH".
4. To cancel the APF action, touch [ APF ] on the LCD.
The "OFF" will appear in the display, confirming that
the APF system is no longer in operation.
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The APF may only be activated while the transceiver is
in CW mode.
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FT-991 O
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F(M-LIST) Button
MULTI Knob
M
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