Hello IBIS Comrades, My co-workers and I were having a discussion today about how simulators should handle TX equalization during RX training. I took an action item to run this past the Open Forum and make sure I was speaking correctly. "RX optimization (adaptive equalization), if it exists, occurs during Step 3, i.e. the call to RX AMI_Init. During optimization the RX algorithmic model must consider TX equalization, if it exists, and there is more than one way to accomplish this. Two are documented in the IBIS 5.1." By the way, Section 10.2.3.2 was clearly written. Most of our questions were answered simply by reading two pages of the spec. Greg Edlund Senior Engineer Signal Integrity and System Timing IBM Systems & Technology Group 3605 Hwy. 52 N Bldg 050-3 Rochester, MN 55901