Picotest J2154A PerfectPulse® Differential TDR

Product Code: J2154A

Overview Image Placeholder — Picotest J2154A PerfectPulse Differential TDR The J2154A revolutionises impedance testing by delivering sampling-grade TDR performance in a pocket-sized, USB-powered package costing a fraction of traditional instruments. This breakthrough enables signal integrity engineers to perform professional impedance measurements without the £15,000-£50,000+ investment typically required for dedicated TDR systems. Where It Fits Single-Ended TDR P2105A TDR Probe Bundle Differential TDR P2103A Differential Probe Complete Solution TDR Measurement Systems Why It Matters Feature Why It's Important What You Gain 30ps Rise Time Enables high-resolution spatial measurements Detect impedance changes as small as 164 mils on FR4 USB-C Power Eliminates external power requirements Portable testing capability for field and production use Oscilloscope Integration Leverages existing test equipment investment Professional TDR without dedicated sampling instruments Differential Capability Modern designs require differential pair testing Complete impedance characterisation for high-speed digital The J2154A includes a demo trace board with various impedance structures, enabling immediate hands-on learning and measurement validation for new users.

Wiring Quick-Start Host Direction Through Device Notes Oscilloscope Ch1 → BNC-SMA Cable J2154A Port 1 TDR signal input/output Oscilloscope Ch2 → BNC-SMA Cable J2154A Port 3 Differential mode (optional) J2154A Port 2 → TDR Probe Device Under Test Signal injection point J2154A Port 4 → TDR Probe Device Under Test Differential return (if used) USB-C Port → USB Cable 5V Power Source 118mA typical, 130mA max Code Snippet // Oscilloscope Math Setup for TDR Analysis // Configure for impedance calculation from reflection coefficient Math1 = 50 * (1 + Rho) / (1 - Rho) where Rho = (Ch1 - Ch2) / (Ch1 + Ch2) // Time-to-Distance Conversion Distance = (Time × c × √εr) / 2 // c = speed of light, εr = relative permittivity (~4.3 for FR4)