Belden demonstrates unique cable performance properties of its HDMI cables for HD audio and video


Belden runs an unamplified 1080p/60 digital video signal over 30 meters of connectorized HDMI video cable with crystal clear results.

Belden, the leader in professional A/V signal transmission technology, now offers a complete line of cables and related products for use by the home theater installer, including 26 AWG shielded twisted pair HDMI cables in lengths of 1, 2, 3, 4, and 7 meters. And to demonstrate the unique cable performance properties of these HDMI cables, Belden has successfully run an unamplified 1080p/60 digital video signal 30 meters from a generic Blu-ray Disc player to a generic 1080p/60 display. The result: a crystal clear 1080p/60 digital video signal over 30 meters.

According to Werner Eich, Market Manager Broadcast EMEA for Belden, the secret behind the Belden HDMI cables is the patented Bonded-Pair® technology: “Belden has used this technology for over sixteen years in Category 5, 5e, 6 and now Category 6A 10 gigabit (10GBASET) data cables. Bonded-Pairs attach the two insulated wires of each pair together, without any glue or bonding agent. This makes the most stable pair ever made, providing unequalled impedance tolerance.

Even when the cable is flexed or bent, the conductor-to-conductor spacing remains constant. This means that the impedance also remains constant, and the problems of regular twisted pairs, such as impedance variations, are minimized. Impedance variations cause signal reflection ("return loss"). These variations also allow the signal to radiate off the cable (egress) and to pick up noise from other sources (ingress). Reducing these effects allows cables made this way to run farther, with less signal loss, and less noise, than regular twisted pairs.”

In addition to making bulk cable with Bonded-Pairs, Belden also produces standard Nonbonded-Pair HDMI cables as assemblies. Werner Eich: “We believe these to be the highest quality Nonbonded-Pair HDMI cables, so our customers have a choice of Bonded-Pair or Nonbonded-Pair cables (HD2001-2007). All of these meet Belden’s high standards of quality, performance, consistency, and reliability.

Belden HDMI cables are performance tested

Belden’s HDMI cables are performance tested to verify their capability to handle transmissions in advanced high definition applications based on 1080p. These digital video/audio cables are also UL-rated for residential and commercial installations (including in-wall use).
Belden verifies HDMI cable performance, among other methods, with a technique known as an "Eye-Pattern" test. Other critical electrical parameters tested by Belden include Impedance, Attentuation, Crosstalk, and Skew.

In eye pattern testing, the digital data signal traveling along the cable is repetitively sampled and applied to the vertical input of an oscilloscope, while the data rate is used to trigger the horizontal sweep. The result seen on the scope is a series of lines that might be thought of as signal traces. In the very middle of the eye diagram is a flattened hexagon called the "eye mask.” If signal traces cross into the region of the eye mask, the cable fails the test. On the other hand, an acceptably-performing cable (or other HDMI component) will yield a wide “eye” area. In general, if a source – a device generating an HDMI signal – produces a good signal and if the HDMI cable delivers that signal at least well enough to pass the eye pattern test, the display in a home theater setup should be able to reconstitute the digital signal without errors.

Werner Eich says: “The home theater is an exciting entertainment option that provides consumers with a total immersion viewing and listening experience. Home theater devices must be capable of sending and receiving a wide range of video and audio signal types. The selection of cables to support that signal traffic is critical. The use of HDMI compliant cable from Belden will help ensure that you enjoy superior, uncompressed digital video and audio quality in your new home theater as your installation expands and evolves.”

HDMI cables background

HDMI cables are the interface between any audio/video source and any audio and/or video monitor in a home theater setup, as well as providing support for standard, enhanced, or high-definition video and multichannel digital audio – all on a single assembly.

Belden HDMI digital video/audio cables can be used to connect HDMI sources like broadband/cable set-top boxes, digital video recorders, DVD players, HD-DVD and Blu-ray players to displays like plasma screens, digital light projection (DLP) projectors, liquid-crystal displays (LCDs) and liquid crystal on silicon (LCOS) or digital image light amplification (D-ILA) devices, among others.

HDMI (High Definition Multimedia Interface) is the first industry-supported interface for uncompressed, all-digital audio/video. This standard was created by a consortium of media-industry giants for high performance digital connections. There have already been five versions of HDMI since it was first released in 2002. Each has provided the consumer more features and performance, but also specified more speed and bandwidth.

Where digital computer data is relatively tolerant of transmission losses, video data is not. For a sharp, clear picture accurate transmission of data bits is essential, requiring a high quality HDMI cable. Currently, 1080p (Category 2, version 1.3b) is the highest resolution format used for broadcasting and consumer distribution of video content. In the term "1080p" the number 1080 represents 1080 lines of vertical display resolution, and the letter p stands for a progressive (non-interlaced) scan.

About Belden

Belden designs, manufactures and markets signal transmission solutions, including cables, connectors and I/O modules as well as network devices and control, load sensing and load moment limitation systems designed for safety-critical applications ranging from industrial automation to data centers, broadcast studios and the aviation and aerospace industry. The company focuses on segments of the worldwide cable and automation markets that require both highly specialized and readily available products. With manufacturing facilities in North America, Europe and Asia, Belden has recorded a total revenue of USD 2 billion for the fiscal year 2008.

Together with its brands Hirschmann™ and Lumberg Automation™, Belden offersan extensive and highly specialized product portfolio covering the full range of data communications – from the information and control levels down to the field level. The company has more than 15 offices throughout Europe, the Middle East and Africa, with manufacturing facilities in Czech Republic, Germany, the Netherlands, UK, Denmark, Italy and Hungary.

For more information about Belden, please visit www.belden-emea.com.

For further information, please contact:

Nancy van Heesewijk
Lelyweg 6
4612 PS Bergen op Zoom
The Netherlands
Tel: +31 164 317 018
Fax: +31 164 317 039

Berry Medendorp
Tel: +31 77 387 8555
Fax: +31 77 387 8488


Belden runs an unamplified 1080p/60 digital video signal over 30 meters of connectorized HDMI video cable with crystal clear results. (Photo: Belden, PR117)

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