The Keysight 85131C is an 81 cm (32 in) long1 semi-rigid cable with a 3.5 mm female2 to PSC-3.5 mm female connector. Cable frequency range is dc to 26.5 GHz with a return loss of 17 dB or better. Insertion loss is 0.43 * sqrt(f) + 0.3, where f is frequency in GHz, for the test port connector and 2.5 dB at maximum frequency for the device connector. Phase stability of the semi-rigid/flexible cables is specified with a 90 degree bend using a 4 to 3 inch radius. Stability1 of the Keysight 85131C is less than 0.06 dB and phase is 0.16 * f + 0.5, where f is frequency in GHz.