Watching signal amplitude is easy on software defined radios. But accurate DFT displays need to be cleaned up with windowing. Here’s why and how. Read more
Tag: hamr
Perseus SDR Preamp – Mystery is Solved
Many listeners have wondered about the mysterious Perseus SDR Preamp that seems to do nothing much. Mystery solved. Here’s how. Read more
SDR Receiver Creates Numbers
Deep down, your SDR receiver creates numbers. Lots of them. Where do these numbers come from? What do they mean and how are they used? Read more
Beamforming Comparison – Analog versus Digital
My experimental beamforming comparison shows that both analog and digital approaches work well and provide roughly the same results. See my video. Read more
Spectrum Display Noise Floor – Shifting Sands
Did you ever wonder why the spectrum display noise floor changes when you adjust spectrum display width on your SDR? Keep reading for the answer. Read more
Watching Digital Radio Signals
If you enjoy looking at signals, you will love watching digital radio signals. Many of these exist across the radio spectrum, from long waves to microwaves. Read more
Digital Phasing Reduces Radio Frequency Interference
Watch digital phasing reduce local noise and interference using Spatial Interference Filtering Techniques. It really works! Read more
SDR Spectrum Man-Made Noise is Everywhere
Your SDR spectrum man-made noise is a constant and distracting companion. Some call it noise, but it is really interference from nearby electronic devices and appliances. Read more
Geomagnetic Activity Effects HF Propagation
It seems like even small bumps in geomagnetic activity are ruining HF radio propagation for me this summer. Beware a K Index more than 2! Read more
Understanding SDR Spectrum Noise Floor
Let’s find out what the SDR spectrum noise floor means and where it comes from. And, we’ll do some math, too! Read more