RE: why 20ppm tolerance for ref. clk ?
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From: Krishna Sankar [mailto:firstname.lastname@example.org]
Sent: Tuesday, May 29, 2001 11:48 PM
Subject: why 20ppm tolerance for ref. clk ?
I have read that, reference clock in Clock Data Recovery Unit used in SONET
needs to have a tolerance of + or - 20 ppm to meet SONET output frequency
Can any one of you please explain how this figure is attained.
thanks in advance,
Krishna Sankar M
Tel : +91-80-8520408 / 8520416 Ext. 4320
Fax : +91-80-8520478
email : email@example.com <mailto:firstname.lastname@example.org>