The MEASure group of commands is used to acquire data using a set of high level instructions. They are structured to provide trade-off fine control of the measurement process for easy operability. MEASure? provides a complete capability where the power meter is configured, a measurement taken, and results returned in one operation. The instrument is set to a basic, predefined measurement state with little user intervention necessary or possible. Sometimes, more precise control of measurement is required. In these cases, MEASure? should not be used. Rather, a sequence of configuration commands, generally from the CALCulate and SENSe groups should be used to set up the instrument for the measurement, then READ? or FETCH? commands are used to return the desired measurement data in a specific format.