Eye Pattern Measurements
There are several important measurements that are made on eye patterns. These are specified
as required tests for many standards. Eye measurements mainly deal with amplitude and timing,
which are outlined as follows:
Eye Amplitude
Eye amplitude is a measure of the amplitude of the data signal. The measurement is made using
the distribution of amplitude values in a region near the center of the eye (normally 20% of the
distance between the zero crossing times). The simple mean of the distribution around the “0”
level is subtracted from the mean of the distribution around the “1” level. This difference is
expressed in units of the signal amplitude (normally voltage).
Figure 5. Eye Measurements
370 SDA-OM-E Rev H
To Next Page
Loading...
Need help?
General