Hello D-Tools Newsletter Subscribers and welcome to another edition of HDMI Cable Constriction 101 from Kordz USA !
Last month we went over the five basic methods of contact termination. If you missed this article, you may review it here. In addition to contact termination, another important – and distinctly different – aspect of HDMI cable construction is connector shielding. As you will see, not all connector shielding is the same.
There are 5 main methods for in-shell shielding of the HDMI cable/connector transition:
1. Don’t have any ………………… Surely no need for explanation why this is a bad idea, but it’s staggeringly common! In fact, this is probably the second most common method of connector shielding.
2. Copper foil ………………………. A simple wrap of copper foil around the terminals. Cheap and reasonably effective for mass market products. Most use the foil alone as the bridge between the cable braid and connector chassis, but better examples join the braid and chassis directly. This is probably the most common technique used.
3. Full metal connector ………… Often with no internal shield or insulation, resulting in the shell being live with ground current, and also very heavy and bulky! Please pay special attention to the overmold as they can be over spec and block other HDMI ports.
4. Internal tray assembly ………. An elegant and effective method whereby the front plug chassis continues almost the full length of the connector, and a ‘hood’ is placed over the top to complete the shield.
5. 360 ° Alloy internal shell …….. Kordz GEN-4 all features an internal single-piece alloy shell for 360° coverage, and very is lightweight. Furthermore it’s insulated from the outer shell to eliminate any stray ground currents. Not only does this method offer superior insulation and EMC shielding, but also ensures added strength in the critical cable termination point of the cable.
Like contact termination, there are varying methods and degrees of quality. Knowing the differences in advance can go a long way to ensuring that your cable is capable for your particular applications.
Next month, we’ll explore connector tolerances and how that affects the manufacturer, installer, and the consumer.
If you need any additional information on this topic or any Kordz related products, feel free to drop me a line.
Kordz USA, Inc