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Rick, thanks for providing the test points. I
have more questions than comments (probably the general response to someone that
has just done a pot load of work). I notice that the tests indicated that
your transmitted voltage levels of about 50 - 70 db above a microvolt caused the
radiated emission to fail class B by about 30 to 50 dB, depending on the data
point. We all know that there is very loose coupling between power on the
lines and radiated power, since there is som much that is dependent on
geometry. However, you have created a nice stake in the
ground.
Based on the measurements you have made, would you
care to make any very rough estimates of the power levels that might cause
radiation problems, and how those same power levels would impact noise. I
would dearly love to be able to bound the problem of how much noise might be
transferred to the signal lines from powering the signal pairs, and was
wondering if you have any insights that might tie some of your measurements back
to this problem?
Thanks again for the good work Rick!
Best regards,
Robert D. Love
President, LAN Connect Consultants 7105 Leveret Circle Raleigh, NC 27615 Phone: 919 848-6773 Fax: 720 222-0900 email: rdlove@xxxxxxxx
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