A measurement test instrument and associated voltage management system for accessory device

摘要

A measurement test instrument (10) voltage management system for an accessory device (12) has a accessory device interface (16) that provides a voltage to a memory device (22) in the accessory device (12). A sensing signal (24) is generated when the accessory device is connected to the interface that causes an interrupt signal to be coupled to a controller (38). The controller retrieves accessory device data stored in the device memory (22) via the interface and determines if the connected accessory device is a valid device capable of being supported by the measurement test instrument (10) and voltage power requirements for the accessory device. The controller generates an enable signal (40) for a valid and supported device that is coupled to a voltage switching circuit (30). The voltage switching circuit generates at least a first output voltage (28) based on the voltage power requirements that is coupled to the accessory device (12) via the interface (16) to provide power to the accessory device.