J2121A High Power Line Injector - 400V/20A PSRR Measurement Tool

Overview

The Picotest J2121A High Power Line Injector is an essential test adapter for advanced power supply analysis. Designed for high-power applications, it supports input bus voltages up to 400V and currents up to 20A at 1MHz, making it ideal for military and satellite power systems. This versatile tool enables precise measurements of the Power Supply Rejection Ratio (PSRR), DC-DC converter input impedance, and inductor characteristics under DC bias.

Unlike traditional injection transformers, the J2121A excels in measuring ripple rejection without risking equipment damage. It features a regulated DC output with a fixed 750mV voltage drop and allows modulation of the input DC supply voltage using a network analyser source signal. The device includes an isolated current sense monitor output for direct VNA connection, eliminating the need for separate current probes.

With its 100Hz to 1MHz bandwidth and unity gain transfer, the J2121A offers unparalleled accuracy in power supply testing. The package includes a J2171A 200mA low-noise power supply, a 1-ohm calibration fixture, and a comprehensive user manual, ensuring out-of-the-box functionality for professional design engineers tackling complex power system challenges.