Teledyne LeCroy WaveExpert 100H Operators Manual - Manual (Page 158)

Operator’s Manual
156
WE-OM-E Rev A
Eye Crossing Crossing level of the
eye diagram
Eye Cyc Area The area under the
mean persistence trace
over the first UI on the
display
Eye delay Time to the first
crossing of an eye
relative to the trigger or
eye reference
Eye delta delay Delay of crossing times
between two eyes
Eye fall time Fall time of the mean of
the persistence map 90% to 10% default;
user selectable levels
Eye frequency Bit rate expressed as a
frequency
UI
F
* 2
1
=
Eye height Vertical eye opening
0 1 0 1
3 3
σ σ − − − =
P P EH
Eye mean Mean level of the eye
∑
UI
i
y
M 0
1 y
i
are the samples
between the eye
crossing times. M is the
number of samples in
the region within the
eye crossing points.
Eye Open Fac Size of vertical opening
of the eye Vertical eye closure
penalty
⎟⎟
⎠
⎞
⎜⎜
⎝
⎛
=
0
log 10
A
OMA
VECP
Eye over N Suppression ratio (RZ
only)
( )
( )
0 2 / 1 0
0 1
P P
P P
SR
−
−
=
−
P
0-1/2
is the zero level
1/2 of a UI from the
peak (one level) of the
RZ signal
Eye over P Positive overshoot of
eye diagram
List of Parameters
The following table describes the instrument parameters. Availability of some parameters
depends on the options installed. See the comments in the "Notes" column of the table.