Teledyne LeCroy HDO6000 Operators Manual - Manual (Page 66)

HDO6000 High Definition Oscilloscope
Parameter Description
Threshold arguments specify two vertical values on each edge used to compute fall time. Formulas for
upper and lower values:
lower = lower thresh. x amp/100 + base
upper = upper thresh. x amp/100 + base
First Indicates value of horizontal axis at left cursor.
Frequency
(freq)
Period of cyclic signal measured as time between every other pair of 50% crossings. Starting with first
transition after left measurement gate. The period is measured for each transition pair. The reciprocal of
each period measurement is calculated as the frequency.
Freq@level
(freq@lv)
Period of cyclic signal measured as time between every other pair at the specified level. Starting with first
transition after left measurement gate. The period is measured for each transition pair. The reciprocal of
each period measurement is calculated as the frequency.
FWxx Measures the width of the largest area histogram peak at xx% of the population of the highest peak.
Half Period
(hper) Half period of a waveform.
Hist Ampl
(hampl) Difference in value between the two most populated peaks in a histogram.
Last Time from trigger to last (rightmost) cursor.
Level@X
(lvl@x)
Gives the vertical value at the specified x position. If the x position is between two points, it gives the
interpolated value. When the Nearest point checkbox is checked, it gives the vertical value of the nearest
data point.
MATLAB Produces a parameter using a user-specified MATLAB function.
Maximum
(max) Measures highest point in waveform. Unlike top, does not assume waveform has two levels.
Mean
Average of data for time domain waveform. Computed as centroid of distribution for a histogram of the data
values.
Median The average of base and top values.
Minimum
(min) Measures the lowest point in a waveform. Unlike base, does not assume waveform has two levels.
N-cycle Jitter Peak-to-peak jitter between edges spaced n UI apart.
None Disables parameter calculation
Num Points
(npoints) Number of points in the waveform between the measurement gates.
Overshoot-
Amount of overshoot following a falling edge. This is represented as percentage of amplitude. Overshoot-
is calculated using the formula (base - min.)/ampl x 100. On signals not having two major levels (triangle or
saw-tooth waves, for example), may not give predictable results.
Overshoot+
Amount of overshoot following a rising edge specified This is represented as a percentage of amplitude.
Overshoot+ is calculated using the formula (max. - top)/ampl x 100. On signals not having two major levels
(triangle or saw-tooth waves, for example), may not give predictable results.
Peaks Number of peaks in a histogram.
Peak to Peak Difference between highest and lowest points in waveform. Unlike ampl, does not assume the waveform
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