Radar Signal Analysis With Oscilloscope Demodulation
Learn how oscilloscope demodulation and FFTs reveal radar pulse envelopes, Barker-coded phase modulation, chirp behavior, and frequency content.
58 articles
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Six Principles of FFT Analysis Using Real-time Oscilloscopes
FFT analysis converts time-domain oscilloscope data into a frequency-domain spectrum, revealing the signal’s underlying sine-wave components and interference sources.
Back to Basics: S-parameters
S-parameters quantify how signals reflect and transmit through a network, providing a frequency-domain view of loss, impedance, and signal integrity.
Six Ways Not to be Confused by S-parameters (Part I)
Clear definition of DUT boundaries and correct interpretation of port indexing are essential to accurately measuring and understanding S-parameters.
Six Ways Not to be Confused by S-parameters (Part II)
Understanding the differences between reflection coefficient, return loss, transmission coefficient, and insertion loss eliminates common S-parameter confusion.
Situational Awareness: RF Noise in the Lab
Understanding your lab’s RF background with spectral analysis and near-field probing helps separate real device emissions from environmental noise.
Near Field vs. Far Field Radiated Emissions
Near-field measurements capture all radiation components close to a device, but only dipole terms dominate far-field EMC compliance results.
Testing for Near Field Radiated Emissions in the Time Domain
Time-domain near-field probing reveals radiated emission signatures synchronized with switching currents, helping pinpoint return path discontinuities before EMC testing.
Unintentional Antennas in Electric Circuits
Small amounts of common current from ground bounce and return path gaps can turn ordinary interconnects into efficient radiating antennas.
Signal and Power Integrity Tutorial: Measuring Clock Jitter Sensitivity to Power Rail Noise, Pt. 2
By correlating filtered power rail variations with clock period tracking, you can quantify and verify a clock’s jitter sensitivity to supply noise.
Signal and Power Integrity Tutorial: Measuring Clock Jitter Sensitivity to Power Rail Noise, Part 1
By injecting a controlled power rail perturbation and tracking clock period variation, you can quantify a clock’s sensitivity to supply noise.
Eliminating DC Resistively Coupled Noise: A Signal and Power Integrity Tutorial
While split ground planes can reduce low-frequency resistive cross talk, differential signal routing provides a more robust and lower-risk solution.
Inductively Coupled Noise and Resistively Coupled Noise: A Signal and Power Integrity Tutorial
Understanding how return currents create inductive switching noise and low-frequency resistive crosstalk is essential to designing low-noise ground planes.