Appendix B: Algorithms
TDS 500D, TDS 600B, & TDS 700D User Manual
B–11
Timing measurement. The ratio of the negative pulse width to the signal period
expressed as a percentage.
NegativeWidth is defined in Negative Width, below.
If Period = 0 or undefined then return an error.
NegativeDutyCycle =
NegativeWidth
Period
100%
Amplitude (voltage) measurement.
NegativeOvershoot =
Low * Min
Amplitude
100%
Note that this value should never be negative (unless High or Low are set
out-of-range).
Timing measurement. The distance (time) between MidRef (default = 50%)
amplitude points of a negative pulse.
If MCross1Polarity = ‘–’
then
NegativeWidth = (MCross2 – MCross1)
else
NegativeWidth = (MCross3 – MCross2)
Waveform[Start]
See Mean dBm on page B–10.
Amplitude measurement. The absolute difference between the maximum and
minimum amplitude.
PeaktoPeak = Max – Min
Negative Duty Cycle
Negative Overshoot
Negative Width
Optical Power
Peak to Peak
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