HP/Agilent N4871‑61620 (Keysight N4871A) is a 3.5 mm male to 3.5 mm male matched coaxial cable pair sold as a BERT cable kit, typically 1.0 m length, intended for high‑frequency test and measurement applications requiring matched pair timing and impedance performance.
Model designation: N4871‑61620 (commercially referenced as N4871A) is offered by Agilent/Keysight as a 3.5 mm to 3.5 mm matched pair cable kit for bit‑error‑rate test (BERT) and other high‑speed signal applications.
Connector type: Both ends terminate in 3.5 mm male coaxial connectors (two cables, each with 3.5 mm male terminations).
Impedance: Designed for 50 Ω systems (standard for 3.5 mm coaxial assemblies used in RF and microwave test equipment).
Intended frequency performance: 3.5 mm connectors and matched 50 Ω cables are specified for microwave frequencies; product listings and datasheets position this kit for high‑frequency BERT and RF interconnect use.
Length: Common commercial listings specify a 1.0 m cable pair configuration for the N4871‑61620 / N4871A kit.
Matched pair construction: Supplied as a matched pair to preserve timing and amplitude symmetry between two signal paths, suitable for differential or paired‑channel test setups.
Primary application: Use with BERT instruments, high‑speed digital test equipment, and RF/microwave test benches where matched timing and impedance are required.
Compatibility: Physically and electrically compatible with instruments and fixtures that accept 3.5 mm male coaxial connections and require 50 Ω matched cabling; commonly used with Keysight/Agilent test gear and third‑party BERT/test systems.