The Model 2308 is a specialized power supply that has a very fast recovery to large, near instantaneous load current transitions. Conventional power supplies do not have this capability. The Model 2308 is designed specifically to respond to large load changes and very short pulsed loads with small transient voltage drop and a very fast recovery time. Typical devices that have these types of characteristic loads are mobile phones, wireless communication modules, and other portable, battery operated devices. The Model 2308 can maintain a near-constant output, even under quickly-changing load conditions. The power supply can measure a wide range of load currents. It can resolve down to 0.1 μA and measure up to 5 A. It has fast measurement capability as well and can measure load current pulses as narrow as 50 μsec. The Model 2308 can simulate the output of a battery. Its programmable output resistance can simulate a battery’s internal resistance so that the voltage output looks exactly like that of a battery’s output. The two channels can also sink current so that one channel (the battery channel) simulates a discharged battery, while the other channel (the charger channel) can be used to simulate a charger.