The dual-channel Model 2306-VS Battery/ Charger Simulator with External Triggering is designed specifically for development and high speed production testing of DC battery-operated products, such as cellular handsets, cellular components like RFIC power amplifiers, and other high volume precision electrical components that require a DC voltage supply. Like Keithley’s original single-­channel Model 2302 Battery Simulator and dual-channel Model 2306 Battery/ Charger Simulator, this precision power supply has ultra-fast transient response to provide out- put characteristics identical to actual batteries. However, in addition to the capabilities offered by these models, the Model 2306-VS (voltage step) provides two external trigger inputs, which allow independent control of the instrument’s output channels. These trigger inputs speed and simplify control of the output channels by eliminating the time lags associated with GPIB data communications. The Model 2306-VS combines these external trigger inputs with built-in test sequencing to create an extremely fast voltage supply and measurement instrument that minimizes the need for computer and GPIB interaction.