Rigol DS6000 Series User Manual page 156

RIGOL
threshold middle values the falling edge of source A and the rising edge of
source B and can be calculated according to "Delay A →B " and the period of
source A.
The phase calculation formula:
Wherein, Phase represents Phase, Delay represents Delay, PeriodA
represents the period of source A.
Note: The default value of the threshold middle value is 50%. You can also set it via
MEAS  Setting  Type  "Threshold". For the setting method, refer to
"Measurement Setting".
6-20
Delay
= ×
Phase
PeriodA
6 To Make Measurements
°
360
DS6000 User's Guide