Hi, Walter; Thanks for the graphs. I have two questions: 1. Noise "Rx_Noise_Pad" is injected into the analog circuit. What is the impedance of the noise source? How is the noise source connected to the circuit? Can you provide a SPICE netlist so that this parameter is unambiguously defined? 2. Since parameters Rx_DCD, Rx_RJ and Rx_SJ are jitters external to receiver as stated in the BIRD, how do Rx model developers know their values? Similarly, how do Rx model developers know the value of Rx_Noise_Pad which is injected to the Rx analog circuit? Thanks, Fangyi From: ibis-macro-bounce@xxxxxxxxxxxxx [mailto:ibis-macro-bounce@xxxxxxxxxxxxx] On Behalf Of Walter Katz Sent: Tuesday, May 10, 2011 1:13 PM To: IBIS-ATM Subject: [ibis-macro] Jitter Bird Graphic, and Backchannel Presentation All, Presentation made to IBIS ATM today. Walter Walter Katz wkatz@xxxxxxxxxx<mailto:wkatz@xxxxxxxxxx> Phone 303.449-2308 Mobile 720.333-1107