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Call the AVPro Team at –North America 877-886-5112 Interna1-605-274-6055
image down in YCbCr, which produces a slightly lower quality image than converting the 1080p
signal to RGB and then scaling it to the display resolution.
Color spaces can include 4:2:2 YCbCr, 4:4:4 YCbCr, 4:4:4 RGB, and possibly others. While viewing
this pattern, select in turn the different color spaces, watching for problems.
Check for loss of line structure, scaling, ringing, smearing and sharp resolution.
Choose the color space that has fewest problems. If all spaces are equivalent choose 4:2:2 YCbCr.
HDMI Troubleshooting
General
This section covers basic troubleshooting guidance for HDMI devices and systems using the SIX-G.
This is a practical field service guide and not a lab guide or debugging tool for manufacturers. We
use the divide and conquer process of elimination by being able to inject known signals into an
HDMI system, and it works quite well in identifying about 99% of issues that are commonly
encountered in the field. At this writing (Sept 2015) the industry is in the middle of change - again
- 4K UHD is upon us - and we just got done switching everybody to 1080P!
Features of the SIX-G that expedite the troubleshooting process include:
•
High-Bandwidth reference test patterns - 2160P60 @ 4:4:4/RGB - inject to verify system
compliance and operation.
•
HDCP Switch - OFF, 1.4, 2.2 - Verify system and device compatibility.
•
Motion Test Patterns - Verify video quality and check for and eliminate video artifacts.
•
Portability - Battery operation expedites component-to-component testing in complex
distribution systems - no more fumbling for an AC outlet – especially at a POE device
connection.
Caution - When troubleshooting and in general don't connect and disconnect HDMI cables and
equipment while your devices are powered on (Hot Plug Event). HDMI carries a low DC voltage
while connected and disconnected "hot" components can in some cases cause damage.