Fangyi, That is correct. The enclosed ppt file explains this in detail and shows that this definition is the same as in 5.0 Walter From: fangyi_rao@xxxxxxxxxxx [mailto:fangyi_rao@xxxxxxxxxxx] Sent: Tuesday, August 16, 2011 3:04 PM To: wkatz@xxxxxxxxxx; ibis-macro@xxxxxxxxxxxxx Subject: RE: [ibis-macro] Updated Jitter BIRD (123). Hi, Walter; The Tx_DCD in the formula on page 2 is HALF of the peak-to-peak DCD. Fangyi From: ibis-macro-bounce@xxxxxxxxxxxxx [mailto:ibis-macro-bounce@xxxxxxxxxxxxx] On Behalf Of Walter Katz Sent: Tuesday, August 16, 2011 11:01 AM To: IBIS-ATM Subject: [ibis-macro] Updated Jitter BIRD (123). All, I have modified the Jitter BIRD to include formula applying all of the Jitter and Noise parameters to time domain waveforms. The interesting ones to discuss are the Rx Sj parameters. I am including this for those that will not have access to the WEB meeting graphics. Walter Walter Katz wkatz@xxxxxxxxxx Phone 303.449-2308 Mobile 720.333-1107