Network analysers having any of the following: 1. An output power exceeding 31,62 mW (15 dBm) anywhere within the operating frequency range exceeding 43,5 GHz but not exceeding 90 GHz; 2. An output power exceeding 1 mW (0 dBm) anywhere within the operating frequency range exceeding 90 GHz but not exceeding 110 GHz; 3. ‘Non-linear vector measurement functionality’ at frequencies exceeding 50 GHz but not exceeding 110 GHz; or 4. A maximum operating frequency exceeding 110 GHz; Technical note : ‘Non-linear vector measurement functionality’ is an instrument's ability to analyse the test results of devices driven into the large-signal domain or the non-linear distortion range.