RBW Influence on Peak or Mean Power Measurement of Pulsed Signals

Modern radar systems occupy very wide bandwidth, either by using a very short pulse width or through pulse compression techniques. Besides the measurement of the pulse timing characteristics like pulse width or pulse interval, the verification of emissions according to EN or FCC standards is mandatory. ETSI regulations for measuring peak transmission power from in-vehicle telematics equipment and radar operating at 77-81 GHz require 50 MHz bandwidth for the measurements.

This application note provides information on how to perform spectral emission measurements on pulsed signals with spectrum analyzers using RBW filters with very wide bandwidth, and explains the capabilities and the limiting factors of the Rohde & Schwarz FSW signal and spectrum analyzer to perform this measurement.

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