Here is a great video explaining the concept of signal-to-noise ratio.
Signal to Noise Ratio
The video “Signal to Noise Explained in plain English. | Ham Radio For Dummies K6UDA Radio – YouTube” explains the concept of signal-to-noise ratio (SNR) in the context of ham radio. The video is presented by K6UDA Radio, who simplifies the technical jargon of SNR for a layperson. SNR refers to the ratio of the desired radio signal to the background noise in the receiving equipment, measured in decibels.
Having a good receiver is important to overcome SNR, especially on certain bands. The noise floor, which is the level of atmospheric noise picked up by the receiver, is an important factor in SNR. Pixie dust is a term used to describe atmospheric noise, which can create heavy noise floors, particularly on 80 meters.
The video provides an example of how digital signal processing can improve SNR by filtering out noise. The video also contains information about a meter giveaway for subscribers.