PMI Eagle 220, Руководство пользователя

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What the Eagle™ Records
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large amount of memory to store raw waveforms. The memory
size of a single 3-cycle waveform capture record is larger than the
size of four hours of interval graph data (at one-minute intervals).
Trigger Logic
Waveform capture uses a single threshold for triggering. This
threshold is a percentage. At the end of each 60Hz cycle, the
RMS voltage for that cycle is compared with the RMS voltage of
the previous cycle. If the percent change in RMS value is greater
than the threshold, waveform capture is triggered.
Any voltage channel can trigger waveform capture. The voltage
must be at least 5V to trigger. If a trigger occurs, the waveform
data is recorded.
The trigger test is repeated every cycle, so if the RMS voltage
keeps changing, waveform capture will continue to be triggered,
until the voltage stabilizes.
Figure 25 – Typical Waveform Capture
What is Recorded
When a trigger occurs, the waveform data for the triggering cycle
is recorded, along with the date and time (to the nearest cycle).