375 MHz is a third harmonic for 100BaseTX.
The primary frequency for 100BaseTX is 125 MHz (the extra 25 covers
Ethernet overhead).
_ Honeywell
David W. Sterner
Quality Assurance Engineering
2 Corporate Center Drive - Suite 100
P.O. Box 9040
Melville, NY 11747
Phone: (516) 577-2321
Fax: (516) 577-3540
[email protected]
<http://www.honeywell.com>
[email protected]
<http://www.IEEE.LI>
Editor, The Pulse
IEEE 05888136
From: [email protected] [mailto:[email protected]] On Behalf Of
Knighten, Jim L
Sent: Friday, November 21, 2008 4:17 PM
To: [email protected]
Subject: 375MHz from 10/100Base-T
I am experiencing a robust radiated emission at 375 MHz from a rack
containing various computing hardware. This seems to come from Ethernet
10/100Base-T switches, cables, etc. Have others experienced this
frequency with Ethernet hookups?
Jim
__________________________
James L. Knighten, Ph.D.
EMC Engineer
Teradata Corporation
17095 Via Del Campo
San Diego, CA 92127
858-485-2537 - phone
858-485-3788 - fax (unattended)
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This message is from the IEEE Product Safety Engineering Society emc-pstc
discussion list. To post a message to the list, send your e-mail to
<[email protected]>
All emc-pstc postings are archived and searchable on the web at:
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Graphics (in well-used formats), large files, etc. can be posted to that URL.
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Instructions: http://listserv.ieee.org/request/user-guide.html
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