Tektronix DPO7054 Quick Start User Manual

Analyzing Wavef
orms
Automated Measurement Selections
The following tables list each automated measurement by ca tegory: amplitude, time, more, histogram, or communication.
(See page 80, Taking Automatic Measurements.)
Amplitude Measurements
Measurement Description
Amplitude
The high value less the low value m easured over the entire waveform or gated region.
High
This value is u sed as 100% whenever high reference, mid reference, or low reference values
are needed, such as in fall time or rise time measurements. It can be calculated using either
the min/max or histogram method. The min/max method uses the maximum value found. The
histogram method uses the most common value found above the midpoint. This value is measured
over the entire waveform or gated region.
Low
This value is used as 0% whenever high reference, mid reference, or low reference values are
needed, such as in fall time or rise time measurements. It can be calculated using either the
min/max or histogram method. The m in/max method uses the minimum value found. The histogram
method uses the most common value found below the midpoint. This value is measured over
the entire waveform or gated region.
RMS The true Root Mean Square voltage over the entire waveform or gated region.
AC RMS The true Root Mean Square voltage over the measurement region.
Max
Typically the most positive peak voltage. Max is measured over the entire waveform or gated region.
Min
Typically the most negative peak voltage. Min is measured over the entire waveform or gated region.
Pk-Pk
The absolute difference between the maximum and minimum amplitude in the entire w aveform
or gated region.
Cycle RMS The true R oot Mean Square voltage over the first cycle in the waveform or the first cycle in the
gated region.
+Overshoot This is m easured over the entire waveform or gated region and is expressed as:
Positive Overshoot = ((Maximum - High) / Amplitude) x 100% .
-Overshoot This is measured over the entire waveform or gated region and is expressed as:
Negative Overshoot = ( (Low - Minimum) / Amplitude) x 100%.
Mean
The arithmetic m ean over the entire waveform or gated region.
Cycle Mean The arithmetic m ean over the firstcycleinthewaveformorthefirst cycle in the gated region.
Time Measurements
Measurement Description
Rise Time
The time required for the leading edge of the first pulse in t
he waveform or gated region to rise from
the low reference value (default = 10% ) to the high reference value (default = 90%) of the final value.
Fall Time
The time required for the falling edge of the first pulse in the waveform or gated region to fall from
the h igh reference value (default = 90%) to the low reference value (default = 10%) of the final value.
Pos Width
The distance (time) between the mid reference (default 50%) amplitude points o f a positive pulse.
The measurement is made on the fi rst pulse in the w avefor
m or gated region.
Neg Width
The distance (time) between the mid reference (defau
lt 50%) amplitude points of a negative pulse.
The measurement is made on the fi rst pulse in the w aveform or gated region.
+ Duty Cyc The ratio of the positive pulse width to the signal period expressed as a percentage. The duty cycle
is measured on the first cycle in the waveform or gated region.
82 DPO7000 Series and DPO /DS A70000/B Series Quick Start User Manual

Tektronix DPO7054 Specifications

General

Brand	Tektronix
Model	DPO7054
Category	Test Equipment
Language	English