Teledyne LeCroy AORM - Advanced Optical Recording Measurements - Manual (Page 84)

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ISSUED: June 2013 923133 Rev A
By enabling cursor
tracking, the difference
cursors are swept
across the histogram.
As expected, the space
between the 3T and 4T
distributions is the
shortest, because of
inter-symbol
interference and the
many 3T widths. The
spacing is 138 ns.
To measure the spread of widths for the distributions, set the measure mode to My Measure and
configure the parameters:
1. P2: average of F2
2. P3: high of F2
3. P4: low of F2
4. P5: range of F2
Because parameter measurements are performed only on those portions of the waveform
between the parameter cursors, activate tracking so that they can be swept across the histogram.
Set the difference between the cursors so that they encompass one clock period. In this case, the
histogram is shown at 0.2
µs per division. Set the difference between the parameter cursors to:
2315 10
2 10
116
9
6
.
.
.
⋅
⋅
=
−
−
divisions