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All – Ramin Farjadrad would like to propose the following text for transmit jitter (I’m just forwarding) -george 149.5.1 Test Modes Modify Test Mode 2 as follows Test mode 2: Transmit MDI Jitter in Master Mode Test mode 2 is for transmitter jitter testing on MDI when transmitter is in MASTER timing mode. When test mode 2 is enabled, the PHY shall transmit a continuous pattern of
JP03A (as specified in
Clause 94.2.9.1) or JP03B (as specified in
Clause 94.2.9.2)
with the transmitted symbols timed from its local clock source.
149.5.2.3 Transmit Timing Jitter
Add the following to Transmit Timing Jitter 149.5.2.3.2 Transmit MDI Jitter in Master Mode Jitter measurements in this subclause are performed with transmitter is enabled in Master timing mode with a local clock. To Measure Random Jitter in RMS (RJrms) and Deterministic
Jitter (DJ) followsteps as specified in Clause 94.3.12.6.1, with following modifications: fn
=1MHz x s, T = 68ns/s
(where s=1 @10G, s=0.5 @5G,
s=0.25 @2.5G) And for Even-odd jitter (EOJ) measurement follow steps as specified in Clause
94.3.12.6.2.
The calculated transmit timing jitters for RJrms, DJ, and EOJ from above measurements should be: RJrms = 1ps/s,
DJ = 9ps/s, EOJ = 4ps/ s (where s=1 @10G,
s=0.5 @5G, s=0.25 @2.5G) George A. Zimmerman, Ph.D. President & Principal Consultant CME Consulting, Inc. Experts in PHYsical Layer Communications 1-310-920-3860 To unsubscribe from the STDS-802-3-NGAUTO list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=STDS-802-3-NGAUTO&A=1 |