[SI-LIST] Re: HDMI Frequency Failing RE Test by 7dB!!!!
- From: "Traa, Boris" <boris.traa@xxxxxxxxxxx>
- To: "ah.vinod@xxxxxxxxx" <ah.vinod@xxxxxxxxx>, SI-LIST <si-list@xxxxxxxxxxxxx>
- Date: Wed, 23 May 2012 15:13:07 +0000
Dear Venod,
You said that TV is oke and Blu Ray is tested. Seperately or as a combination
with the same cables you also used to attach your board?
Kind regards
Boris Traa
System design engineer EMC
It's the currents that make circuits work or fail.
Philips Innovation Services/EMC center
Room 2.020
High Tech Campus 26
5656AE Eindhoven, The Netherlands
Tel: ++ 31 40 27 43766
Fax: ++ 31 40 27 42224
E-mail: boris.traa@xxxxxxxxxxx
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On
Behalf Of vinod ah
Sent: Wednesday 23 May 2012 3:58 PM
To: SI-LIST
Subject: [SI-LIST] HDMI Frequency Failing RE Test by 7dB!!!!
Hi All,
I am designing a board with HDMI input and HDMI output. I am facing EMI issue
at 742.5MHz (failing FCC limits by 7dB) when running 1080p30 on both Input and
output HDMI i.e. BLu ray player connected to HDMI input connector of my board
is giving out data at 1080p30 and HDMI out of my board is connected to TV which
is also 1080p30 content. So i am unable to find out how is 742.5MHz coming out
as radiation as it is 10th Harmonic of pixel clock 74.25MHz!!!!!!!. I am not
facing any issues with other harmonics except for this. So i am totally
confused on how to go about debugging this issue.
Note: All the signals are routed on top layer without vias and all signals have
solid ground plane reference. The blu ray player and TV used, is tested for
radiation and no significant levels seen.
Regards
Vinod A H
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