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April 5-7, 2022|Santa Clara Convention Center| Santa Clara, CA
Location: Ballroom C
Date: Thursday, April 7
Time: 2:00 pm - 2:45 pm
Track: Drive World - Advanced Automotive
Format: Technical Session
Theme : Automotive, High-speed Communications
Pass Type: 2-Day Pass, All Access Pass
Vault Recording: TBD
High speed serial data buses, such as 10 Gb/s Ethernet and faster, prescribe the measurement bandwidth used for measurement. This practice improves repeatability of test across vendors. Originating in telecom, then popularized in Ethernet for datacom, this is now becoming important in standards for automotive and other markets using high speed serial data. The usage of Ethernet in automotive standards in particular is hurt by lack of precedent, and the IEEE 802.3â€™s preference to â€śrely on the discretion of the implementerâ€ť in some parts of the specification. Consequently the specifications of measurement bandwidth is in practice often misunderstood or poorly implemented and results in measurement errors.
We explain the rationale for controlling the bandwidth of the measurement equipment, and what the impact of the standard specification on measurement results. Further we will discuss the part that only a few optical standards explicitly mention in spite of the fact that it impacts both electrical and optical signalsâ€™ measurements alike: the end of measurement filter compliance.
We will also discuss the 802.3â€™s policy of relying on the implementerâ€™s expertise in some specifications, and how to interpret the standardâ€™s requirement technically, without bias.