Intel Agilex® 7 Device Family High-Speed Serial Interface Signal Integrity Design Guidelines

ID 683864
Date 6/15/2023
Document Table of Contents

1.2. Channel Insertion Loss (IL) Budget Calculation

The following figure is an example of a channel IL budget calculation for an end-to-end (TP0 to TP5) 200GBASE-CR4 channel, with the IL estimation at the Nyquist frequency for each channel component provided. Estimate the minimum and maximum insertion loss allocations for each component of the channel (from the transmitter to the receiver) to meet the link standard budget (for example, IEEE 802.3cd).

Figure 2. 200GBase-CR4 End-to-End Channel IL Estimation ExampleAssign a few dB of margin to the end-to-end channel PCB design to account for PCB manufacturing and process, voltage, and temperature (PVT) variations.