The R&S ZNB40 from R&S is a mid range vector netwok analyzer with two or four test ports for the frequency range from 100 kHz to 40 GHz. It has a dynamic range of 135 dB which makes it possible to perform precise measurements on wideband DUTs or components whose behavior at low frequencies is especially important. The analyzer has a large 12.1 inches touch screen inteface which makes it easy to control and review test results. The ports on the R&S 20 have 2.92 mm Male connectors.