This part of 60512 is applicable to electrical connectors, sockets, cable assemblies or interconnection systems. This part of 60512 describes a frequency and a time domain method to measure return loss as a function of frequency.
DS/EN 60512-25-5:2004 history
2004DS/EN 60512-25-5:2004 Connectors for electronic equipment - Tests and measurements - Part 25-5: Test 25e - Return loss