Magnus, completing my pevious remarks, I found a better match with the following formula:
C/N0(dBHz) = 19 log(AMU) + 25 It does look perhaps a bit odd to use '19' instead '20' but together with the offset of 25 it inclines a bit the curve to fit well for AMU 2 to AMU 15. If ever a real precise value will be possible - I doupt it. Perhaps the Thunderbolts do have small differences in conversion factors? Can wet expect high precision here as it is not a measurement device for reception levels? Arnold On Sun, 14 Feb 2010 00:50:57 +0100, Magnus Danielson wrote: >Arnold, >Arnold Tibus wrote: >> Magnus & Mark, >> >> for my Thunderbolt system I found a very good correlation >> between AMU and dBc/ Hz ( observed on my system using >> the ThunderboltMonitor watching over long time stable satellite signals ) >> when I use the Formula: C/N0(dBHz) = 20 log(AMU) + 23.5. >It would work well, but for lower AMU values (in particular 0) it would >not work so well. Something like the above was my initial assumption. >The availability of AMU=0.0 for a 20 dBc/Hz signal suggests a little >more happens. >Cheers, >Magnus _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
