----- Original Message ----- From: "ad9850" > > sorry I forgot to mention this. I followed the more or less standard > of 500 Hz bandwith. >
There was an article in the RSGB magazine recently that said MDS is not a substitute for NF (Noise Factor) but the concept of Minimum Detectable Signal seems easier to understand. I can make an approximate reading of the smallest signal I can receive but how do I know what bandwidth I am looking at? I can do it by ear or by looking at a waterfall, I will get vastly different results. By ear I may be using a 500Hz filter, by using a waterfall I could be looking at a fraction of a Hz. Under what conditions are these measurements made? 73 Alan G4ZFQ
