Tuesday, October 20, 2015

Part 5 of Construction of a HDMI Cable: Termination

In the previous installments of this series, we have discussed everything needed for the best performing HDMI cable and to improve overall performance in a system.  With that being said without the proper termination quality parts will mean nothing and the cable will not provide top performance.

It is very important to control the heat, silver content, quantity and flow of the solder. Less is more in this application and of course “Cleanliness is next to Godliness”.  Extra solder closes the gaps between the connection points and that can/will create its own RF field. To add insult to injury, when it comes to the soldering process ROHS (Federal Lead standards) has mandated that lead be mostly removed from solder for safety reason.  Unfortunately this means that solder most be applied at a higher temperature for it to flow. Higher temps mean a greater chance of thermal damage to any board level components.

What does this have to do with cables?
                                                           
Solder work must be done with the greatest of care and with a very small thermal operating window.   Careful is not cheap and cheap is not careful.

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