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ATEM production 4K SDI input problem
Posted:
Thu Apr 19, 2018 8:15 pm
by Philippe Domengie
I've read 3 or 4 similar topics on the forum but no solution or explanation really match what we experience :
We have 4 Sony cam that output a 1080p50 signal through HDMI. If we use Kramer FC-113 converter (540 euros) to 3G-SDI and connect to one of SDI input of ATEM, no signal. If we use a Decimator MD-HX (320 euros...) , then it works normally...
If we use FC-113 to SDI then FC-331 (total 1080 euros...) back to HDMi then input in HDMI in Atem, then it works...
Crazy no ???
WHY ? Does someone have a clue ?
Thanks for all your help, it's for a school and passionated students.
Re: ATEM production 4K SDI input problem
Posted:
Fri Apr 20, 2018 4:28 pm
by Philippe Domengie
So, I’ve been around surfing and here is some details of my search :
For 3G HD-SDI, 2 possibilities : Level A or B.
- Level A is used for streaming 1080p50 or 60 in the easy way : one stream on one cable.
It’s used on most of computer screen and a LOT of converter. The cheapest one but also the Kramer.
- Level B is used for the same (1080p50 and 60) but it’s 2 streams on one cable that seem to be used for extra bit depth info (like 4.4.4 or 10bits or both, i’m not sure).
But what I’m sure of is :
- Decimator MD-HX is capable to receive and send at both level A and B
- Kramer plays only with A level as Christie VP does.
- ATEM sdi input seems to only « understand » B level
- ATEM sdi program output is switchable between A and B and it does the trick with a lot of converter or VP.
All my best.
Re: ATEM production 4K SDI input problem
Posted:
Sun Apr 22, 2018 2:54 pm
by Xtreemtec
Indeed Level A vs B issue.. And you switch the Whole Atem from Level A to Level B when you switch that setting.. Not just the output.
We run a lot of 4K setups.. But when we run HD we do it 1080P so 3G.. We recently did a test on all our gear to check what standard they are. Put that into a database and put a sticker on each device telling what standard it supports..
We prever Level B as most hardware does do level B. But sometimes we run into issues with hardware from others.. So we always carry a few decimators with us on spare..
Re: ATEM production 4K SDI input problem
Posted:
Wed Apr 25, 2018 8:06 pm
by Philippe Domengie
Thanks a lot, it confirms all my researches and also the necessity to have some Decimator...
Re: ATEM production 4K SDI input problem
Posted:
Thu Aug 16, 2018 9:04 pm
by MM4CDDK
got an issue on my atem
is there any chance of the atem receive an input sdi signal from a 1080i60 pc?
Re: ATEM production 4K SDI input problem
Posted:
Mon Aug 20, 2018 9:08 am
by Xtreemtec
MM4CDDK wrote:got an issue on my atem
is there any chance of the atem receive an input sdi signal from a 1080i60 pc?
With a Decimator MD-HX or BMD UpDownCross HD converter you will..