Eye diagram analysis is a standard validation step for interfaces like HDMI, USB, PCI Express and Ethernet. These protocols define compliance masks and acceptable jitter levels to ensure interoperability and performance. An eye diagram is a useful tool for understanding signal impairments in the physical layer of high-speed digital data systems, verifying transmitter output compliance, and revealing the amplitude and time distortion elements that degrade the BER for diagnostic purposes. The resulting shape, which visually resembles a human eye, provides an instantaneous and intuitive. Eye diagrams are the oldest and most widely used compliance methodology for high-speed serial links. The appearance of the eye diagram allows us to visually assess the performance of a channel and quickly evaluate key parameters of the signal, such as the amount of ISI, noise, and jitter. WHAT COULD POSSIBLY GO WRONG? 1. DIFFERENTIAL SIGNALS − Connect 2 scope channels to differential signal of the DUT − Switch on differential math with Differential and Common Mode signal as output. The DAC38RFxx family of devices comes equipped with the capability to generate eye diagrams by using JTAG communication with the DAC38RF8x eye scan GUI software.
