Portable Rtl-Sdr Based Frequency Analyzer

The specialized super heterodyne Spectrum analyzers in general measure and display unevaluated data unprocessed signal information. It measures the desired range of signals, converting them to a much lower frequency of logarithmic level representation. This low cost portable potent test equipment analyse the frequency content of input signals up to 5 kHz. The device analyzes large measurements range, without knowing the phase relationships among the sinusoidal components. Frequency spectrum owns important information that spills over into adjacent channels and evaluating interference, distortion, harmonics, bandwidth and other spectral components, which are not easily detectable in time-domain waveforms.This test model RTL SDR- dongle based low cost Spectrum analyzer measures EMI, EMC and harmonics using a simple LED driver circuitry for all standard test equipment. It achieves desired electromagnetic compatibility. Various characteristic measurements including gain, frequency, bandwidth and amplitude of signals are measured and same is implemented using Matlab 2019 Version. Multiples of fundamental order Harmonic frequencies are deducted using an efficient filter.