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Agilent 4 Steps for Making Better Power Measurements Application Note 64-4D Four Steps for Power: The Fundamental Making Better Power RF and Microwave Measurements Measurement Before you select a power meter and Even a cursory analysis will reveal that Power measurement is the its associated sensors, make sure present power sensor technologies' fundamental parameter for that you have taken the following four have considerable overlap in characterizing components and steps, each of which can influence capabilities. New system technologies, systems at RF and microwave the accuracy, economy, and technical such as wireless modulation formats frequencies. Above the range of match to your application. and their associated production 30 MHz to 100 MHz, where the test requirements, will often require parameters of voltage and current 1. Understand the characteristics of some combined measurements such become inconvenient or more difficult your signal under test and how as time-gated peak parameters or to measure, microwave power they interact with the power- computed data such as peak-to- becomes the parameter of choice. sensing processes. average ratios. And you can be sure Power specifications are often the that all that data will be required at critical factor in the design, and 2. Understand power measurement speeds that push the state of the art. ultimately the performance, of almost uncertainties and traceability all RF and microwave equipment. to a primary power standard at Your analysis might also include a national laboratory, such as considerations of the installed base Power specifications are also the U.S. National Institute of of other sensors and power meters in central to the economic concept of Standards and Technology (NIST). your organization's inventory. And, it equity in trade. This simply means should consider the traceability chain that when a customer purchases a 3. Understand the characteristics of your organization's metrology lab to transmission product with specified and performance of available national standards. power performance at a negotiated sensor technologies and operating price, the delivered product must meet features of various power meters. This application note will provide you