The eye diagram test for optical modules is a common optical testing method used to measure the performance of optical modules during high-speed data transmission. It is ty pic ally used to test parameters such as transparency, transmission distance, and offline storage. It is vividly named so because its shape resembles an open eye. To generate an eye diagram, an oscilloscope needs to measure a large volume of data and then recover the diagram from the measured. The eye diagram is a graph displayed by a series of digital signals accumulated on the oscilloscope. When the oscilloscope. This instrument class measures samples of the input signal to form an eye diagram that can be used for analysis of the signal's noise, jitter, and eye mask compliance.
