Anritsu's handheld Site Master, Cell Master, BTS Master, Spectrum Master, and VNA Master products provide a wide range of modes and options for power measurements including the High Accuracy Power Meter, the Internal Power Meter, the External Power Monitor, and the Channel Scanner. Each Power Meter solution has its own unique strengths and benefits. The objective of this application note is to discuss the basics of these different power meter solutions and to explain how Anritsu's handheld products can be used to make power meter measurements for different applications.