±60 V, 3 A Precision System PXI Source Measure Unit—The PXIe‑4139 is a high-precision, system source measure unit (SMU). It is ideal for a broad range of applications including manufacturing test or lab characterization with devices ranging from ICs (including PMICs and RFICs) and discrete devices (including LEDs and optical transceivers) to board-level test. The PXIe‑4139 features 4-quadrant operation. The PXIe‑4139 is a hardware-timed instrument with a high-speed sequencing engine for synchronizing acquisitions between multiple SMUs. The module supports direct DMA streaming between the host PC and SMU, so you can stream large waveforms and measurement data at the full update rate and sample rate of the instrument. You can custom-tune the PXIe‑4139 response to any load to achieve optimum responses with maximum stability and minimum transients.