Semi-Rigid Cable Set (21in.) DC 26.5GHz, for network analyzers with a 3.5 mm test port The Agilent (now Keysight) 85131D is an 53 cm (21 inch) long semi-rigid cable set composed of a 3.5 mm female to PSC-3.5 mm female connector and a 3.5 mm female to 3.5 mm male connector. Cable frequency range: dc to 26.5 GHz Return loss: 16 dB or better Insertion loss is: 0.3 * sqrt(f) + 0.2 dB, where f is frequency in GHz, for the test port connector and 1.8 dB at maximum frequency for the device connector Phase stability of semi-rigid/flexible cables: 90 degree bend using a 4 to 3 inch radius Stability of the Keysight 85131D: < 0.06 dB Phase: 0.16 * f + 0.5, where f is frequency in GHz