[802.3_ISAAC] [Return Loss] Cable channel IL and RL limits

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To: STDS-802-3-ISAAC@xxxxxxxxxxxxxxxxx

Subject: [802.3_ISAAC] [Return Loss] Cable channel IL and RL limits

From: Alireza Razavi <arazavimajom@xxxxxxxxxxx>

Date: Wed, 22 Jan 2025 21:37:08 +0000

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Reply-to: Alireza Razavi <arazavimajom@xxxxxxxxxxx>

Thread-index: AdttFOxEMs8XhkHdTaebsa/89jqNwA==

Thread-topic: [Return Loss] Cable channel IL and RL limits

Hi all,

I am sending this email to elaborate more on my comment in the meeting. I don’t believe the ASA limit for return loss is the appropriate limit. In the presentation by Ramanjit Ahuja from November 2024, measurements of four cables showed violations of the ASA limit line in high frequencies.

I’ve included one of these measurements below for reference.

https://www.ieee802.org/3/dm/public/1124/ahuja_8023dm_01e_11112024_poorreturnloss_equalization.pdf

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