METHOD FOR CORRECTING FREQUENCY- AND LENGTH-DEPENDENT LINE ATTENUATION FOR FDR-MEASUREMENTS CARRIED OUT ON HIGH-FREQUENCY CABLES

摘要

The invention relates to a method for correcting frequency-dependent line attenuation for FDR-measurements carried out on high-frequency cables. The usefulness of reflection coefficient measurements is limited by the fact that there can be considerable errors due to the frequency- and length-dependent attenuation that is intrinsic to the cable. The aim of the invention is to provide a means of solving this problem. The invention is based on a set of parameters for an attenuation model being generated for each type of cable to be measured, based on attenuation values provided by the manufacturer. This attenuation model is used to produce a length-dependent correction function in the time domain and this length-dependent correction function is then used to correct the measurement values of the complex reflection coefficient which are also transformed into the time domain, hereby producing physically correct values.