EUROLAB, with its state-of-the-art accredited laboratories and expert team, provides precise and fast testing services within the scope of IEC EN 50289-1-11 test. This Part of IEC EN 50289 details test methods for determining the characteristic impedance, input impedance, and return loss of cables used in analog and digital communication systems. It should be read together with IEC EN 50289-1-1, which contains the essential provisions for its application.
This method should only be applied to cables with non-polar insulating materials, ie materials with dielectric permeability that does not change with frequency. Or in other words, this method should only be applied to cables whose mutual capacitance does not change with frequency.
The average characteristic impedance should be obtained from the measurement of the propagation speed with phase delay respectively according to IEC EN 50289-1-7 and the mutual capacitance according to IEC EN 50289-1-5. The measurement should be made at frequencies above 100 MHz where the phase delay approaches an asymptotic value.
The CUT must have or exceed the minimum length specified in the relevant section specification. Both ends of the CUT should be prepared in such a way that the effect on the test result when connected to the terminals of the test equipment is minimized. Twisting of pairs/quads must be maintained.
It is the purpose of the standard to detail the calibration procedure, not to detail the algorithms applied by a VNA to correct the measured results based on a calibration procedure. More information can be obtained from the VNA supplier's manuals.
Function matching of impedance data is useful for separating structural effects from characteristic impedance when such effects are significant. Where function fitting is used, the concept is that measurements from nearby frequencies help to interpret values obtained at a given frequency. Function fit is based on least square function fit.
EUROLAB assists manufacturers with IEC EN 50289-1-11 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.
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