[ibis-macro] Re: RX Optimization
- From: Ambrish Varma <ambrishv@xxxxxxxxxxx>
- To: "ibis-macro@xxxxxxxxxxxxx" <ibis-macro@xxxxxxxxxxxxx>
- Date: Fri, 8 Mar 2013 09:37:01 -0800
Hi Greg,
Rx training, when you consider real devices, don't have any idea how Tx's are
behaving. In fact they don't even know if there is any Tx equalization exist.
As such, there cannot and should not be any expectation that the simulators
should handle Tx equalization any differently during Rx training. The only
thing that the simulator has knowledge of is how many bits to ignore before it
starts gathering data for analysis purposes.
Glad you consider section 10 (or at least a part of it) clearly written :).
Thanks,
Ambrish.
From: ibis-macro-bounce@xxxxxxxxxxxxx [mailto:ibis-macro-bounce@xxxxxxxxxxxxx]
On Behalf Of Gregory R Edlund
Sent: Friday, March 08, 2013 12:04 PM
To: ibis-macro@xxxxxxxxxxxxx
Subject: [ibis-macro] RX Optimization
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
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