ARRI DigitalGeneral CategoryTechnicalFlicker on SDI Outputs
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Rainer Fritz
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« on: March 03, 2012, 09:17:30 AM »
Hi !

Had yesterday a testshoot with the new V6 firmware on an Alexa+. Sensor and Projectframerate was 24fps, shutter 172,8 degree.
When I switch the scan format from psf to p on the MON Out and REC Out, I see a strange flicker there. With psf it is fine...

anyone else ?

rainer
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Rainer Fritz
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Michael Borenstein
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« Reply #1 on: March 03, 2012, 11:07:42 PM »
Rainer,

We haven't noticed this yet, but I will test your specific set up in the lab on Monday.  What was your lighting set up?

Regards
Mike
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Michael Borenstein
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Rainer Fritz
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« Reply #2 on: March 04, 2012, 07:09:39 AM »
I checked it on an exterior shot as well without any lights and got the same effect. I will check on monday if it has something to do with the tvlogic pvm or it is a specific thing to this cam.

Michael, can you please post on the ARRI homepage in the download section a link to the actual sony sxs drivers which are supporting the 64gb cards as well.

thx
rainer
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Rainer Fritz
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Michael Borenstein
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« Reply #3 on: March 04, 2012, 08:35:09 AM »
Rainer,

That's run by our IT and Marketing team out of Munich, but I will make the suggestion.  Do you need the driver now, I can send you a link.

Regards
Mike
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Michael Borenstein
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Bob
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« Reply #4 on: March 04, 2012, 11:04:37 PM »
Quote
When I switch the scan format from psf to p on the MON Out and REC Out, I see a strange flicker there. With psf it is fine...

Most monitors aren't capable to handle a true progressive HD-SDI signal, and can only work properly with a progressive segmented frame signal. I always advice our clients to put their monitor output signal in PsF.

Best Regards,

Vincent

 

 
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Rainer Fritz
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« Reply #5 on: March 04, 2012, 11:18:37 PM »
A LCD/TFT SDI monitor should be capable of a p signal. PsF was only introduced by sony to be able to feed old interlaced only monitors or equipment which can't handle a p signal like rf-transmitters which reading only tv-standard signals.
The in my case used TVLOGIC VFM-056W is like nearly all other panels a multiformat one. See tec-spec here: http://www.tvlogic.tv/Monitors/M_Spec.asp?sidx=1
I had never problems using a p signal with them....
but I will see if its the monitor or the cam...

Michael, yes please send me the link to the actual working 64gb sxs drivers...

thx
rainer
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Rainer Fritz
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Rainer Fritz
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« Reply #6 on: March 05, 2012, 02:47:38 AM »
After the weekend we were not able to reproduce this effect.
So... closing this one pse...
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Rainer Fritz
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Michael Borenstein
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« Reply #7 on: March 05, 2012, 10:55:53 AM »
Glad to hear that this is not an issue.  Please let me know if something changes.

Here's the driver link:

http://pro.sony.com/bbsc/ssr/mkt-recmedia/resource.downloads.bbsccms-assets-mkt-recmedia-downloads-upgrades.shtml

Regards
Mike
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Michael Borenstein
Digital Service Manager, Arri Inc.

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