Micro HDMI to SDI not working with non-BM converter

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John Roberson

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  • Joined: Wed Apr 19, 2017 8:18 pm

Micro HDMI to SDI not working with non-BM converter

PostWed Apr 19, 2017 8:33 pm

Hello,

Our organization recently purchased 2 BM Micro SDI to HDMI and 1 Micro HMDI to SDI converters.
Our intent is to use them connect an HDMI laptop source and display the content on 6 large monitors in our lobby. We currently have 1 generic HDMI to SDI converter, 1 generic SDI 4x splitter and 4 generic SDI to HDMI converters.

We are slowly improving our production quality for clients which is why chose to start the migration to Blackmagic equipment.

When we use the BM HDMI to SDI converter with the BM SDI to HDMI converters we have zero issues. If we use any of our generic SDI to HDMI converters with the BM HDMI to SDI converter we either get no signal or green scrambled screens.

When we use our generic HDMI to SDI converter to both the BM SDI to HDMI and the generic SDI to HDMI converts we have zero issues. The content displays correctly on all 6 screens.

Has anyone else run into this issue?
Does anyone know why this is happening?

Please help me understand if you have any information.

THANKS!!!
JOHN - Seattle Symphony Orchestra
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John Roberson

  • Posts: 2
  • Joined: Wed Apr 19, 2017 8:18 pm

Re: Micro HDMI to SDI not working with non-BM converter

PostSun May 21, 2017 5:41 pm

So here is BMD official stance....

Thank you for contacting us. In this case, the most likely cause of this behavior would be the EDID negotiations between the Blackmagic converters and these generic ones. All of our products with HDMI ports perform some type of EDID negotiation with the sources and destinations they are connected to. Once of the main reasons for this is to ensure that the HDMI signal is compliant with all copyright laws that our devices are required to follow. It is most likely possible that these generic converters are handling this process differently from the industry standards that our products adhere to, which could cause them to have trouble outputting a signal in this workflow. Given this information, I would not recommend using these generic converters in the same signal path as the Micro Converters, in order to avoid these differences in the EDID negotiations.

Just FYI for everyone out there

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