On Wed, 14 Aug 2013 19:55:03 -0700 (PDT)
m240zz(a)gmail.com wrote:
yes, I am afraid you are assuming all of us are as
smart as you on the
topic so if you have time please have another go at it. You are in a
unique position to do this since you have all the equpiment at hand.
OK. I will try
to make things more clear.
The thing that confuses me is why is it during the
sweeps due the fft look
so different in each of the windows and it seems like the timing of the
sweeps are different. The sweeps happen at the same time for each dongle,
right? The dongles are all listening in parallel at the same time? If
so, seems like they would look more alike at the same time. My apologies
for the density on this end.
The dongles suffer from various problems. Overload and
inadequate anti-alias
filtering. A lot of false signals are generated but that is different
between the different dongles.
The input is identical to all the dongles and you can see that in the beginning
of the video where signal levels are low. At high signal levels they
behave quite differently because false signals dominate (But not in Linrad.)
73
Leif / SM5BSZ