This standard applies to the intermodulation level measurement of radio frequency connectors, connector cable assemblies and cables. The test procedures given in this standard are designed to measure the level of interference signals generated when two or more signals are transmitted inside passive radio frequency components.
GB/T 21021-2007 history
2021GB/T 21021.1-2021 Intermodulation level measurement for passive RF and microwave devices—Part 1: General requirements and measuring methods