Yaesu FT-991A Operating Manual page 47

More Frequency Navigation Techniques
Using the UP/DWN Buttons of the
Supplied MH-31
A8J
The UP/DWN buttons on the supplied MH-31
Microphone may also be used to manually scan the fre-
quency upward or downward.
In modes other than AM/FM,
the frequency changes by the
same step as the main dial.
When the microphone FST
button is pressed, the tuning
rate increases by a factor of
ten, in a manner similar to
the transceiver front panel
FAST button.
T h e f r e q u e n c y c h a n g e
amount ( step size ) differs de-
pending on the preset modu-
lation form and FST button
condition.
Operating
UP
Mode
CW/RTTY/
DATA-LSB/ +5 Hz
DATA-USB
LSB/USB/AM +10 Hz
FM/C4FM/
+5 kHz
DATA-FM
FT- 991 Operating Manual
Hand Microphone
Hand
A8J
DWN FST UP
FST FST
DWN + +
UP DWN
−5 Hz +100 Hz −100 Hz
−10 Hz +100 Hz −100 Hz
−5 kHz +50 kHz −50 kHz
Convenience Features
Page 45