Digital Coaxial
Most existing coaxial cables consist of a chemically foamed dielectric, which is highly susceptible to moisture. Belden strives to produce cables with optimum dielectric qualities. During the extrusion process, the dielectric material (polyethylene) is mixed with inert nitrogen gas using advanced production techniques. This results in a physically foamed dielectric that meets the most severe international quality standards. The most important advantages of the physically foamed dielectric are: Insusceptible to moisture Watertight Mechanically robust Stable attenuation up to at least 3 GHz, Thinner, more flexible, and easier to install cables. A damp heat test is defined in the IEC-standard 68-2 part 3. The results reproduce the influence of moisture. The damp heat test specifies that a cable has to be conditioned at a temperature of 400C and a relative of 93% for a period of 21 days. After this test, the attenuation must not have increased by more than 5% in respect to the pre-test value.
