Teledyne LeCroy AORM - Advanced Optical Recording Measurements - Manual (Page 106)

104
ISSUED: June 2013 923133 Rev A
1.5
Volts
3.15
4.35
Range
10
20
30
40
Count
2 3 4 5 6
The sequence for acquiring histogram data is:
1. trigger
2. waveform acquisition
3. parameter calculations
4. histogram update
5. trigger re-arm.
If the timebase is set in non-segmented mode, a single acquisition occurs prior to parameter
calculations. However, in Sequence mode an acquisition for each segment occurs prior to
parameter calculations. If the source of histogram data is a memory, storing new data to memory
effectively acts as a trigger and acquisition. Because updating the screen can take significant
processing time, it occurs only once a second, minimizing trigger dead-time (under remote control
the display can be turned off to maximize measurement speed).
Parameter Buffer
The parameter buffer allows you to include up to one million values in the trend calculation.
Parameter Events Capture
The number of events captured per waveform acquisition or display sweep depends on the
parameter type. Acquisitions are initiated by the occurrence of a trigger event. Sweeps are
equivalent to the waveform captured and displayed on an input channel (1, 2, 3, or 4). For non-
segmented waveforms an acquisition is identical to a sweep. Whereas for segmented waveforms
an acquisition occurs for each segment and a sweep is equivalent to acquisitions for all
segments. Only the section of a waveform between the parameter cursors is used in the
calculation of parameter values and corresponding histogram events.