High Flex Cable Information


A standard coaxial cable is made from a centre core which the signal propagates along, a dielectric to make sure that the signal is retained in the core, a braided shield and a PVC jacket. The centre core on most coaxial cables used in broadcast systems is a single strand of signal wire usually made from copper or for high-frequency applications the core is also silvered to add conductivity to the cable.

In systems that demand movement of the cables with items of equipment, a flexible cable may be a solution, for a cable to become more flexible it needs to have a core that is multi-stranded. This allows for the cable to bend and flex without the potential to break that a single core has. The downside of increasing the cable's flexibility is that the signal integrity isn't as good as a single-core version.

The areas of application that require more movement of the cable than others are Machine Vision and Medical equipment, which tend us use the CoaXPress protocols.

CoaXPress offers a combination of Image data, Communication, Control and power over a single coaxial cable increasing the demands of the cable from a simple SDI standard. If you are looking for a cable to offer flexible SDI capability the following information will more than cover these standards too.




Cable Type Cable Group Operating Frequency Impedance Jacket Material  / Size Dielectric Material / Size Centre Conductor Material / Size Conductor Type Shielding Outer Conductor
Belden 1505F BC DC-6GHz 75 ohms PVC / 6.15mm FHDPE / 3.68mm Compacted Copper / 0.79mm Stranded/ Flexible Tinned Copper Braid
Belden 1694F AS/BH DC-6GHz 75 ohms PVC / 7.01mm PE / 4.57mm Copper / 1.016mm Stranded/ Flexible Double Layer Tinned Copper Braid
AS/BH DC-12GHz 75 ohms PVC / 6.8mm FHDPE / 4.8mm Copper / 19/0.2mm Stranded/ Flexible Tinned copper Braid & Foil
AS/BH DC-12GHz 75 ohms PVC / 7.2mm FHDPE / 4.8mm Copper / 19/0.2mm Stranded/ Flexible Double Tinned Copper Braid

Key to acronyms:

PVC - Polyvinyl chloride

FHDPE - Gas injected Foam High-Density Polyethylene


Cambridge Electronic Industries have been testing the capabilities of multistranded coaxial cables for use in a CXP environment and are happy to offer the following information on lengths of cable that can be achieved depending on the frequency of the signal. The tests were completed using a Bitflow CLX-PC2-CXP1 and a Basler BOA4096-93CC 1C Camera. Other test setups may provide different results.


Cable Type Micro BNC Connectors Maximum Distance at CXP-3 Maximum Distance at CXP-6 Maximum Distance at CXP-12 Min Bend Radius
Belden 1505F XPT-D001-NGAB 50m 23m 20m 63.5mm
Belden 1694F XPT-D001-NGAS 100m 60m 25m 69.85mm
XPT-D001-NGAS 100m 60m 20m 35mm
XPT-D001-NGAS 90m 40m 13m 35mm
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