The Keysight 85131F is a 62.2 cm (24.5 in) long¹ flexible cable set composed of a 3.5 mm female² to PSC-3.5 mm female connector and a 3.5 mm female² to a 3.5 mm male connector. Cable frequency range is dc to 26.5 GHz with a return loss greater than or equal to 16 dB. Insertion loss is 0.25 * sqrt(f) + 0.2 dB, where f is frequency in GHz, for the test port connector and 1.5 dB at maximum frequency for the device connector. Phase stability of semi-rigid/flexible cables is specified with a 90 degree bend using a 4 to 3 inch radius. Stability¹ of the Keysight 85131F is less than 0.12 dB and phase is 0.13 * f + 0.5, where f is frequency in GHz.