The Keysight 85135F is a dual flexible cable set engineered for high-frequency network analyzer measurements from DC to 18 GHz. Each cable measures 62.9 cm in length and terminates with a 2.4 mm female NMD connector on the test port end and a 7 mm connector on the device end. The set delivers return loss of 17 dB or better across the operating band, with insertion loss performance of 0.3 × √f + 0.2 dB at the test port connector and 1.5 dB maximum at the device connector.
Technical Specifications
• Cable Length: 62.9 cm (24.75 inches) per cable
• Quantity: Two cables per set
• Frequency Range: DC to 18 GHz
• Test Port Connector: 2.4 mm female NMD slotted
• Device Connector: 7 mm
• Return Loss: 17 dB or better
• Insertion Loss (Test Port): 0.3 × √f + 0.2 dB (f in GHz)
• Insertion Loss (Device End): 1.5 dB maximum at 18 GHz
• Amplitude Stability (90° bend, 4–3 inch radius): Less than 0.12 dB
• Phase Stability (90° bend, 4–3 inch radius): 0.13 × f + 0.5 degrees (f in GHz)
– Key Features
• NMD connector design provides enhanced mechanical stability through larger coupling threads
• Minimum bend radius of 4 inches (10 cm) for the 2.4 mm cable sections
• Fragile center conductor requires careful handling to prevent damage from stretching, overtightening, or excessive bending
• Phase stability performance achieved when device under test is connected between cable ends
– Typical Applications
• Network analyzer measurements and calibration
• High-frequency RF testing in laboratory and field environments
• Precision impedance and reflection coefficient characterization
– Compatibility & Integration
Designed for Keysight network analyzers equipped with male NMD-2.4 mm test ports. Female slotted NMD connectors on the test set end ensure compatibility with standard Keysight test port configurations. Proper handling—avoiding tight coiling, vertical hanging, and electrostatic discharge—protects sensitive internal components and maintains measurement accuracy.
