The Topward 6603D DC Triple Digital Power Supply delivers reliable performance at a very reasonable price. Included are such features as constant voltage and constant current modes, short circuit protection, front-panel outputs, operating mode indicators and a 3-1/2 digit LCD display with unit indicators for easy setup and monitoring of outputs. Also provided are 5 V/3 A outputs along with the normal adjustable outputs. Ripple and noise are less than 0.5 mV rms or 4 mV p-p in the constant voltage mode and 0.5 mA rms or 4 mA p-p in the constant current mode. Line regulation is also good: 0.02% + 2 mV (CV), 0.02% + 250 µA (CC). Load regulation: 0.02% + 2 mV (CV), 0.02% + 500 µA (CC). Output impedance: 5 m Ohm + 2 µH. Programming speed: UP NL 400 mS FL600 mS; (0.5% to 9.5%) Down NL 2.5 d FL200 mS. Operates from 115/230 V (±10%), 50/60 Hz input power.