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10.2.1.3 Delay and Phase Parameters
Source A
Source B
Period
Delay
Figure 10.2 Delay and Phase Parameters
1. Delay(r-r): indicates the time difference between the threshold middle values of
the rising edge of Source A and that of Source B. Negative delay indicates that
the rising edge of Source A occurred after that of Source B.
2. Delay(f-f): indicates the time difference between the threshold middle values of
the falling edge of Source A and that of Source B. Negative delay indicates that
the falling edge of Source A occurred after that of Source B.
3. Delay(r-f): indicates the time difference between the threshold middle values of
the rising edge of Source A and the falling edge of Source B. Negative delay
indicates that the rising edge of Source A occurred after the falling edge of
Source B.
4. Delay(f-r): indicates the time difference between the threshold middle values of
the falling edge of Source A and the rising edge of Source B. Negative delay
indicates that the falling edge of Source A occurred after the rising edge of
Source B.
5. Phase(r-r): indicates the phase deviation between the threshold middle values of
the rising edge of Source A and that of Source B. The phase formula is as follows:
°360×=
sourceA
RR
RR
Period
BDelayA
BPhaseA
Wherein,
PhaseA
R
B
R
represents Phase(r-r),
DelayA
R
B
R
represents Delay(r-r), and
Period
sourceA
represents the period of Source A.
6. Phase(f-f): indicates the phase deviation between the threshold middle values of
the falling edge of Source A and that of Source B. The phase formula is as follows:
°360×=
sourceA
FF
FF
Period
BDelayA
BPhaseA
Measurements
DHO4000 User Guide
156
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