Teledyne LeCroy HDO6000 Operators Manual - Manual (Page 67)

Operator's Manual
Parameter Description
(pkpk) has two levels. Peak to peak is calculated using the formula maximum – minimum.
Percentile
(pctl) Horizontal data value that divides a histogram so the population to the left is xx% of the total.
Period
The time between every other pair of 50% crossings. Starting with first transition after left measurement
gate, period is measured for each transition pair, with values averaged to give final result.
Period@level
(per@lv) The time between every other pair of at the level specified. Starting with first transition after left
measurement gate, period is measured for each transition pair, with values averaged to give final result.
Phase
Phase difference between signal analyzed and signal used as reference. Both signals are measured from
the 50% point of their rising edges.
Rise
Duration of pulse waveform's rising transition from 10% to 90% of the amplitude averaged for all rising
transitions between the measurement gates. On signals not having two major levels (triangle or saw-tooth
waves, for example), top and base can default to maximum and minimum, giving less predictable results.
Rise 20-80%
(rise2080)
Duration of pulse waveform's rising transition from 20% to 80% of the amplitude averaged for all rising
transitions between the measurement gates. On signals not having two major levels (triangle or saw-tooth
waves, for example), top and base can default to maximum and minimum, giving less predictable results.
Rise@level
(rise@lv)
Rise at level: Duration of pulse waveform's rising edges between user-defined transition levels.
Threshold arguments specify two vertical values on each edge used to compute rise time.
Formulas for upper and lower values:
lower = lower thresh. x amp/100 + base
upper = upper thresh. x amp/100 + base
RMS
Root Mean Square of data between the measure gates calculated using the formula:
Where: vi denotes measured sample values, and N = number of data points within the periods found up to
maximum of 100 periods.
Setup Time from the data edge to the clock edge.
Skew
Time of clock1 edge minus time of nearest clock2 edge. Both signals are measured from the 50% point of
their rising edges.
Slew Rate
(slew) Slew rate or local dV/dt in a transition zone
Std Dev
(sdev)
Standard deviation of the data between the measure gates using the formula:
Where: vi denotes measured sample values, and N = number of data points within the periods found up to
maximum of 100 periods. This is equivalent to the rms for a zero-mean waveform. Also referred to as AC
RMS
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