Additional Features: Range 1: 0-6V, 0-2.5A Range 2: 0-20V and 0 to -20V, 0-0.5A 35 W triple output Constant voltage (CV) and Current limit (CL) modes (±20V) Constant voltage (CV) and Current foldback (CF) modes (+6V) Low noise and excellent regulation Digital voltage and current meters Output tracking An auto-tracking feature of the Agilent HP E3630A lets you use one voltage control to adjust the +20 V and -20 V outputs simultaneously. The outputs track each other to within 1 percent, making it easy to adjust the power supply circuits requiring balanced voltages.