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Blog Category: Broadcast AV

Posted by: Bob Ferguson on March 03, 2017

As recent test results show, category cables – which are optimized for Ethernet traffic – often struggle with the HDBaseT signal. The characteristics of category cables are, at times, overkill for HDBaseT applications; other times, category cable characteristics are not sufficient to guarantee a good signal. HDBaseT is a different type of signal, and 4K video is pushing that limit even further.  

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Blog Category: Broadcast AV

Posted by: Steve Lampen on March 01, 2017

Many thought it would be impossible to design a cable to transmit a 4K UHD 12GHz video signal on a single coaxial cable. In 2016, Belden designed the first cable that does just that. Upon first glance it’s hard to see what makes this cable different. It still looks like a coaxial cable. But what happens underneath the cable jacket is what truly makes a difference.

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Blog Category: Broadcast AV

Posted by: Bob Ferguson on February 03, 2017

There has been a lot of talk about convergence in the cabling world; some of this has been driven by new technology and market overlapping. Today’s integrator has the ability to install a system that covers phones, computers, security, audio/video and even low-voltage power.

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Blog Category: Broadcast AV

Posted by: Steve Lampen on October 07, 2016

Who decided that the magic distance for video cables today is 100m (328 feet)? Isn’t that the distance limitation of data cables like Category 5e, 6 or 6A? How does that apply to video cable?

Most broadcast and video installations use data cables. In fact, some professionals say that these applications will eventually consist solely of data cables. Right now, many installations have a hybrid design with both data and coax cables, so maybe it makes sense that coax cable follow the same rule.

Five years ago, we decided to create the first cable designed specifically to carry signals up to 100m for 3G-SDI, 1794A. This was a slightly larger cable than 1694A. Even back then, we knew that the next step for video cables would involve 4K. But would 12G-SDI signal transmission over coax cable ever be possible? Most people said no...

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Blog Category: Broadcast AV

Posted by: on August 05, 2016

So you want to upgrade to a 4K system? There are several options when it comes to the type of signal your 4K system can send to display 4K images. To understand which option your AV application might require, it helps to understand what can make up a 4K image signal.

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Blog Category: Broadcast AV

Posted by: Steve Lampen on January 20, 2015

Well, another year is over. During that year I wrote 29 blogs. Did you miss any? Were there some you meant to act on, but other things got in the way? Or maybe you meant to send me an email and yell at me about something I wrote (I love those emails). Here's the list of all my blogs from 2014. Each one is a link. Just click on it to go to that blog. And, of course, you can always send a comment in the form at the bottom or send me an email directly (steve.lampen@belden.com). And if you have an idea for something else I should write about, I love those emails too!

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Blog Category: Broadcast AV

Posted by: Steve Lampen on January 13, 2015

If you google the name "Lampen", one thing you get is all the light bulb manufacturers in Scandinavia. Around the year 1400 or so, my family moved from Saxony (or somewhere like that) to England, and we were lamp makers. My British grandfather spent his entire life trying to convince himself that our last name was not German. My British dad quietly gave up the mis-translation. Now a lamp in 1400 was little changed from the pot of oil with a wick in it which goes back to the dawn of time, but you would think that would have led me to work in the lighting industry. I remember going to CEBIT, one of the largest electronic tradeshows in the world, in Germany. This show is so big, the buildings are permanent. And one of these buildings was all the lighting equipment and fixtures. On the front of the building was the huge word "LAMPEN". So, of course I had someone take a picture of me in front of my building.

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Blog Category: Broadcast AV

Posted by: Steve Lampen on January 06, 2015

Back in 1995, Belden brought out 1694A. It was an instant success. It was the first cable designed specifically for digital video. We won lots of awards at NAB and other shows for this cable. Of course, you can't use a cable without a connector, so in the months leading up to NAB we handed out rolls and rolls of the new cable to all our connector friends. Some people even doubted that anyone could make a BNC connector for this new cable. Back in the analog days, our mainstay was Belden 8281, the king of analog video. People loved it, even though it was a little stiff. As far as connectors went, the quarter-wavelength of analog video (4.2 MHz bandwidth for NTSC) was just under 18 metres (around 59 feet). Now a connector is way less than 59 feet, so it didn't matter what the impedance of that analog connector was. Any impedance was fine. It was then that a million broadcast engineers learned (or figured out) that the connectors they had been putting on the cable for almost 50 years were 50 ohm connectors - even though the cable was 75 ohms impedance.

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