The Keysight 85131H is a 62.2 cm (24.5 in) long (1) flexible cable with a 3.5 mm female (2) to 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 is 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 characterized with a 90 degree bend using a 3 inch radius. Stability1 of the Keysight 85131H is less than 0.12 dB and phase is 0.13o * f + 0.5o, (where f is frequency in GHz). 1 Cable length and stability are supplemental characteristics. 2 Special rugged female connecter is designed specifically for connecting to the network analyzer test port, but does not mate with a standard male connector. Unused, with certificate.