The HDMI interface offers a multitude of benefits to the installer providing a one cable system that provides fully uncompressed Digital video and audio signals between components
The HDMI interface was originally designed to offer a simple source to screen connection in a single location, but now installers are expected to distribute these signals to multiple locations throughout a building and over distances far exceeding the original design specification of HDMI.
Installers are finding that once they try to operate outside of the HDMI parameters or use lower quality cables and active components that they experience one of the following:
Sparkles on the Picture
Audio Drop Out
The problem has always been that because the HDMI interface is a fully digital signal path installers do not have any method to fault find in the chain. That is until now. The HDMI -DAD device from Asheridge offers a unique way to break into the HDMI chain and see what is happening or in the majority of cases what is not!
Having an HDMI -DAD will enable installers to split the system and find out what signals are missing from the HDMI start up sequence. The HDMI - DAD incorporates circuitry to ensure that the low speed portion of the HDMI chain is operating correctly, including checking the 5 Volts from the source equipment ensuring that an excessive voltage drop has not occurred when the 5 volts arrives at the Screen or projector. The unit also checks that the HOT PLUG detect signal is operating within the specified voltage range and that this arrives at the source equipment at the correct voltage.
Once these two voltages have been confirmed the DAD then goes on to check that the EDID signal is operating correctly and everything is OK then the final check is the HDCP signal path.
If any of these checks fail then a picture is extremely unlikely. The HDMI -DAD gives an installer the means to fault find any HDMI installation and see which cables or components are generating issues. At last installers can be more scientific in their approach to fault finding on HDMI systems and eradicate the need for 'equipment swapping' which has been the only option up to now.
The DAD also has another useful feature that restores the rise time on the leading edge of the low speed clocks and this can overcome most of the above issues. If the DAD fixes the problem then it can be left in situ and does not require any additional power supply.