Film-Tech Forum ARCHIVE: Server disconnect on NEC 4k lamp strike

This is topic Server disconnect on NEC 4k lamp strike in forum Digital Cinema Forum at Film-Tech Forum ARCHIVE.

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Posted by James Crowley (Member # 7299) on 05-05-2013, 07:10 AM:

Hi, does anyone have a problem with their server going into transport error when an NEC 4k strikes? This is with a Dolby (862 and 745) and I've heard it happens on doremis as well. Ferrite blocks have been placed in every available place and the server has been put to one side of the projector. I have a theory that there is a momentary power loss to the whole projector when the lamp strikes, so quick that its not noticeable but most equipment but enough to disturb the servers secure connection

Posted by Marcel Birgelen (Member # 6801) on 05-05-2013, 08:44 AM:

Have you tried putting the server on a UPS or different circuit?

Posted by Marco Giustini (Member # 4544) on 05-05-2013, 09:22 AM:

The 745 gets power from the projector itself, the 862 doesn't. If a DSS200 with an 862 loses communication with the projector when the lamp strike, there must be some sort of power surge or some sort of interference that disrupts Ethernet communications.

Try pinging the projector from the server and strike the lamp, see if you get packet loss when you do it.

I would look into the ignitor and maybe make sure the lamp wick is not too close to the mirror or to anything metallic.

Posted by Steve Guttag (Member # 268) on 05-05-2013, 10:06 AM:

None of my NEC/Dolby systems have issues when the lamp strikes. At the moment, they are all CAT 862 though...no CAT 745s in my NECs.