How to Achieve Optimum Power Measurement Speed and Accuracy
애플리케이션 노트
Introduction
When you need to maximize power measurement speeds, knowing three key items can make a significant difference. These items include understanding your test signal, equipment, and which measurement technique to use.
Know Your Test Signal
Knowing the expected power level measurement of the test signal helps you determine what can be done to improve test speed. For example, for low power test signals that fall very low in the power sensor dynamic range, little can be done to improve speed because the noise at that level requires iterations of measurements be averaged to achieve an accurate reading. You also need to know the power type such as CW, average, or peak power of any type of signal (AM, FM, or modulated signal) that needs to be measured. The signal bandwidth of a modulated signal (such as GSM, WiMAX™, WLAN, and LTE) requires the power meter/sensor support video band bandwidth (BW) in order to measure the peak and peak-to-average of the signal. For more details, refer to the Keysight Technologies, Inc. application note 4 Steps for Making Better Power Measurements.