PULSE AND PULSE MODULATED SIGNALS of Spectrum Analyzer

Chapter PULSE AND PULSE MODULATED SIGNALS

Guide to Spectrum and Signal Analysis
Pages 56
Views 820
Downloads : 5 times
PDF Size : 6.6 MiB

Summary of Contents

Guide to Spectrum and Signal Analysis

  • www.anritsu.com | 33PULSE AND PULSE MODULATED SIGNALSWhen a perfectly rectangular pulse waveform is transformed from the time domain to the frequency do main (Figure 38), the resulting envelope follows a function of the form:Figure 39 shows the spectral plot resulting from rectangular amplitude pulse modulation of a carrier. The individual lines represent the modulation product of the carrier and the modulation pulse repetition frequency with its harmonics. Thus, the lines will be spaced in frequency by whatever the pulse repetition frequency might happen to be.SpectrumEnvelopeDCAmplitudeyxτΤτ2Frequencyτ3τ4τ1Τ1Figure 38τΤτ2τ1Τ1Carrier fcFigure 39y = sin xx