User manual

Operator's Manual
List of Standard Measurement Parameters
NOTE: There may be additional parameters available depending on the software options installed on the
oscilloscope.
Parameter Description
Amplitude
(ampl)
Measures the difference between upper and lower levels in two-level signals. Differs from pkpk in that noise,
overshoot, undershoot, and ringing do not affect the measurement. Amplitude is calculated by using the
formula Top – Base. On signals not having two major levels (such as triangle or saw-tooth waves), the
amplitude parameter returns the same value as peak-to-peak.
Area
Integral of data: Computes area of the waveform relative to zero level. Values greater than zero contribute
positively to the area; values less than zero, negatively.
Base
Lower of two most probable states (higher is top). Measures lower level in two-level signals. Differs from min in
that noise, overshoot, undershoot, and ringing do not affect measurement. On signals not having two major
levels (such as triangle or saw-tooth waves), the amplitude parameter returns the same value as minimum.
Delay
Time from trigger to transition: Measures time between trigger and first 50% crossing of specifies signal. Delay
can be used to measure the propagation delay between two signals by triggering on one and determining
delay of other.
Duty Cycle Percent of period for which data are above or below the 50% level of the signal.
Fall 80-20%
(fall8020)
Duration of pulse waveform's falling transition from 80% to 20% of the amplitude averaged for all falling
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.
Fall Time
(fall)
Duration of pulse waveform's falling transition from 90% to 10% of the amplitude averaged for all falling
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.
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.
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.
Minimum
(min)
Measures the lowest point in a waveform. Unlike base, does not assume waveform has two levels.
None Disables parameter calculation
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.
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.
Peak to Peak
(pkpk)
Difference between highest and lowest points in waveform. Unlike ampl, does not assume the waveform has
two levels. Peak to peak is calculated using the formula maximum – minimum.
Period
The time between every other pair of 50% crossings. Starting with first transition after left measurement gate,
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