The Keysight 11857B test port cable set consists of two high-quality coaxial cables with 75 Ohm impedance and a length of 61 cm (24 inches) each. One cable has Type-N plugs at both ends, the other has a Type-N plug and a Type-N socket. The cables are phase balanced with a maximum phase difference of 2 degrees at 1.3 GHz, making them ideal for precise S-parameter measurements in RF test systems. Optionally, the set is also available without phase alignment (option B24), which offers flexibility for different measurement requirements.