Keysight Agilent 85131D Semi-rigid Test Port Cable 3.5 mm (f) to 3.5 mm (m)Condition: Used Achieve phase stability with these 53 cm cables when a DUT is connected between cable ends The Keysight 85131D is an 53 cm (21 in) long1 semi rigid cable set composed of a 3. 5 mm female2 to PSC 3. 5 mm female connector and a 3. 5 mm female2 to 3. 5 mm male connector. Cable frequency range is dc to 26. 5 GHz with a return loss of 16 dB or better. Insertion loss is 0. 3 * sqrt(f) + 0. 2 dB, where f is frequency in GHz, for the test port