Yaesu FTDX101D Operation Manual page 36

MPVD ring
(MULTI PURPOSE VFO OUTER DIAL)
Select the MPVD operation by touching one of the keys: MAIN/SUB dial, VC TUNE, CLAR (Clarifier), C.S (Custom
Select).
The function of the MPVD ring can be changed simply by pressing the key below.
CLAR (Clarifier)
CLAR: Acts as a clarifier knob.
VC TUNE: Adjusts the tuning point when the VC tune function is activated.
C.S: 11 types of functions can be assigned in advance.
MAIN / SUB: Operates as a dial to set the frequency of the SUB band when the operation band
is the MAIN band, and as the frequency of the MAIN band when the operation
band is the SUB band.
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Change the function of the MPVD ring
MPVD ring
VC TUNE
VC TUNE Operation key
C.S (Costom Select key)
MAIN/SUB