4-Channel System SourceMeter, 20V/1A and 6V/3A, 20W. Four-channel SMU instrument in a single 1U full rack chassis Stackable; no 1U spacing requirements between units Tightly-integrated voltage/current source and measure instruments with 6½-digit resolution 20 V at 1 A and 6 V at 3 A power envelopes, 20 watts 100mV to 20V voltage 100nA to 3A current 0.015% DCV basic accuracy Up to 28 open drain digital I/O bits Correlated results to the 2602B System SourceMeter SMU Instrument TSP technology embeds complete test programs inside the instrument for best-in-class system-Level throughput TSP-Link expansion technology for multi-channel parallel test without a mainframe Front Panel LAN (LXI-C), USB 2.0 TMC488 protocol, and digital I/O interfaces Built-in web browser based software enables remote control through browser / computer