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Appendix B: Algorithms
B–14
TDS 500C, TDS 600B, & TDS 700C User Manual
3. From TLR, continue the search, looking for a crossing of HighRef. Update
TLR if subsequent LowRef crossings are found. If a HighRef crossing is
found, it becomes the high rise time or THR. (Use linear interpolation if
necessary.)
4. RiseTime = THR – TLR
High
HighRef
LowRef
Low
THRTLR
Rise Time
Figure B–3: Rise Time
Amplitude (voltage) measurement. The true Root Mean Square voltage.
If Start = End then RMS = the (interpolated) value at Waveform[Start].
Otherwise,
RMS =
ŕ
End
Start
Ă(Waveform(t))
2
dt
(End * Start) SampleInterval
Ǹ
For details of the integration algorithm, see below.
RMS: