Atlona Help Center

KB01105 - AT-ETU-SYNC Features Explained


ETU-SYNC Features Explained:

5V (5 volt): 5 volt refers to the 5 volt signal an HDMI source sends along with the video/audio information. This allows an HDMI source to read the EDID information of a display as well carry video from the source to the display. A lack of adequate 5V current can cause issues with signal pass-through.

The AT-ETU-SYNC allows you to analyze your HDMI signal path to confirm there is adequate 5V signal being passed.

HPD (Hot Plug Detect): Hot Plug Detect is the communication passed from a source to an HDMI/DVI display which allows the display to be aware that a signal is being passed to it. This is what will cause monitors to turn themselves on from a stand-by state when a source begins passing signal to them.

The AT-ETU-SYNC allows you to test the HPD signal on your signal path to confirm that there are no errors or factors blocking HPD from reaching the display. If you see that your display is in a stand-by state or says “No Signal”, running an HPD test on the AT-ETU-SYNC would allow you to verify if there are issues with the cabling, devices in the signal path or the display in accepting a signal.

HDCP (High-bandwidth Digital Content Protection): HDCP is a digital copyright protection signal which is passed between a source and display (as well as any product between them) to ensure there is no risk of content being illegally copied. HDCP has evolved throughout the years and the current HDCP standard is 2.2. This is what allows 4K videos to be watched on 4K TV’s that support HDCP 2.2 EDID. HDCP content is typically present on devices such as: Blu-Ray Players (playing commercially available Blu-Ray’s), Media Players (playing encrypted channels such as NetFlix, Hulu, HBO GO, Amazon Video) as well as computers streaming online content from online sources such as NetFlix, Hulu, Amazon Video and others. Some computers will allow users to output a non-HDCP encrypted signal until they launch a video that is encrypted such as one on iTunes. DVD’s do not carry HDCP content, neither do most video’s on YouTube and user-created videos. Video conferencing systems do not allow HDCP to pass due to the fact that streaming HDCP content is not allowed. Along with HDCP a process analyzing “key’s” occurs. This is when a particular source states how many display’s a signal can be viewed on. Most sources only allow video to be shown on one display. Using an Atlona matrix allows you to view video through a process called “key copy and replication”.

The AT-ETU-SYNC allows a user to analyze their signal path to verify if HDCP content is able to pass. Alternatively, if the customer is using an older TV that does not support a specific HDCP format, they may get a message regarding lack of HDCP support. The AT-ETU-SYNC can be used to confirm if there is HDCP signal being passed from the source or if the sink (display) does not support HDCP. This helps determine which part of the signal chain may need to be replaced due to lack of HDCP.

 The AT-ETU-SYNC does not have the ability to strip away HDCP content as this is an illegal process Atlona does not support.

Article ID: KB01105 


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