HI, Thanks for sharing experience!
Question to FT8 and "noise" relations - In usual case everything in passband is noise except signal of interest. So with only one FT8 signal and white noise in passband S/N can be increased narrowing passband till it matches signal width. EME guys know that JT65 -16 dB signals are audible. But if there are many other FT8 signals (which are "noise" since are out of interest for me) then energy from all these 59++ signals are integrated as noise and my 57 signal became "very deep in the noise". If to narrow bandwidth in this case we get rid of QRMing 59++ signals (and proportional part of band white noise) - they are not integrated and our signal gets "above noise". Is this right or there is some magic excluding other FT8 signals from S/N calculations? Still very doubt in FT8 ability to be decoded 10dB below CW. -3 dB at best. 73 Arunas LY2IJ 2018-12-20 05:57, Joe Subich, W4TV rašė: >> Is the definition of "noise floor" being changed for FT8? > WSJT-X (and WSJT before that) defines noise as the integrated value > of noise (noise power) across the 2500 Hz (approximately based on > the receiver filter) receive bandwidth. > > 73, > > ... Joe, W4TV _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
