Dear Alberto,
lots of QRSS operators are successfully using your fine Argo
software - so do I. It has been essential for making the LF and MF
band accessible to amateur radio. So, first of all, thank you so
much for this great piece of work! At Nov 6, 2016 you wrote to
Clemens, DL4RAJ:
"I have in my future plans,
after I will have finished a couple
of projects that are absorbing all of my time at present, to
do an overhaul of
Argo, maybe changing some of its architecture, which dates
back to 20 years ago..."
So I think it could be a good moment to ask
for possible future extensions of Argo´s features. Could it
be practicable to add something like a "notch-function" to
the horizontal waterfall display, at its best with an
adjustable bandwidth? It should work in front of the ALC
function to avoid reduced sensitivity due to strong unwanted
signals and should be effective in the non-ALC-modes too.
For example: the MF QRSS beacon IQ2MI on 476,180 kHz usually
booms in here every evening making it difficult to look at
weaker signals within spittig distance to this frequency. In
such situations a visual notch would be great! Having an
extremly sharp AF notch my Perseus RX does this job rather
well (indeed not on its own screen but on the VAC linked
Argo screen!) but with many other receivers it isn´t
possible due to their notches being much to wide for use at
real narrow bandwidths.
Another nice gimmick would be to have an alarm function if a
signal appears in a given range of frequencies on the
running waterfall - perhaps something like an inversion of
the notch function. Most of the usual squelch circuits of
the upstream receivers would not do this job at weak signals
without blanking the whole screen.
Sorry - it´s not difficult to create ideas but I can´t
measure effort nor feasibility for their realization. But
perhaps something is possible ...
Thanks for your ever-lasting inspiration,
gl es vy 73 de
Tom, DK1IS
www.qrz.com/db/dk1is
|
|
