ML2439A USB Power Meter User Guide : Automatic Measurements : Introduction
 
Introduction
The ML2439A automatically analyzes the waveform data in the buffers and calculates key waveform parameters. The calculated values are displayed in text mode when you press the Text/graph system key. Measurement definitions are described in Table: Measurement Definitions.
Measurement Definitions
Text
TERM
DEFINITION
Width
Pulse Width
The interval between the first and second signal crossings of the mesial line.
Rise
Rise time
The interval between the first signal crossing of the proximal line to the first signal crossing of the distal line.
Fall
Fall time
The interval between the last signal crossing of the distal line to the last signal crossing of the proximal line.
Period
Pulse Period
The interval between two successive pulses (reciprocal of the Pulse Repetition Frequency).
PRFreq
Pulse Repetition Frequency
The number of cycles of a repetitive signal that take place in one second.
Duty C
Duty Cycle
The ratio of the pulse on-time to off-time.
Offtime
Off-time
The time a repetitive pulse is off (equal to the pulse period minus the pulse width).
Peak
Peak Power
The maximum power level of the captured waveform.
Pulse
Pulse Power
The average power level across the pulse width, defined by the intersection of the pulse rising and falling edges with the mesial line.
Oversh
Overshoot
A distortion following a major transition (the difference between the maximum amplitude of the overshoot and the top line).
Avg
Average Power
The equivalent heating effect of a signal.
IEEETop
Top Amplitude
The amplitude of the top line (see IEEE definitions).
IEEEBot
Bottom Amplitude
.The amplitude of the base line (see IEEE definitions).
Skew
Skew
The time between the mesial level of a pulse on one channel and a pulse on a second channel.
EdgeDly
Edge Delay
The time between the left edge of the display and the first mesial transition level of either slope on the waveform.
Rise
Rise-time
The interval between the first signal crossing of the proximal line to the first signal crossing of the distal line.