The Agilent/Keysight N1021B is an 18 GHz differential TDR/TDT probe kit engineered for high-speed signal integrity characterization on PCBs and components lacking standard RF connectors. It performs differential time-domain reflectometry and transmission measurements to identify impedance discontinuities, shorts, opens, and other transmission line anomalies. The probe interfaces directly with Keysight DCA-X mainframes and TDR/TDT modules, delivering time and frequency-domain analysis of differential impedances and S-parameters down to the component level.
Technical Specifications
• Bandwidth: Up to 18 GHz
• Nominal Differential Impedance: 100 Ohms
• Probe Tip Spacing: 0.0 mm to 2.54 mm or 0.5 mm to 2.54 mm
• Probe Tips: Hardened, spring-loaded, independently movable in Z-axis; chamfered design for small pad contact; non-replaceable
• Durability: Greater than 7500 touchdowns at force ≤ 10 N
• Variable Risetime: Less than 20 ps to 1 ns (mathematically adjustable)
• Connector Interface: SMA Female
– Key Features
• Differential TDR and TDT measurement capability
• S-parameter extraction (SDD11, SDD21, magnitude, phase, group delay)
• TDR calibration using shorts and loads for cable de-embedding
• Ergonomic handheld design with flexible cables and slim body
• Independent thumb-wheel tip adjustment for precise positioning
• Extended tips for target visibility during measurement
– Measurement Capabilities
• Differential impedance characterization and return loss analysis
• Insertion loss measurement and signal integrity troubleshooting
• Detection of faults including shorts and opens
• Time and frequency-domain impedance analysis versus distance or frequency
– Compatibility & Integration
The N1021B integrates with Keysight DCA-X Wideband Oscilloscope Mainframes (86100C, 86100D) and differential TDR/TDT modules such as the 54754A. Optional 86100C/D-202 Enhanced Impedance and S-Parameter Software enables automated measurement and analysis workflows. Compatible also with other Keysight TDR/TDT modules and remote sampling heads including the N1055A 35/50 GHz multi-port unit.
