To: rsgb_lf_group@yahoogroups.co.uk, rsgb_lf_group@blacksheep.org
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From: DK1IS <DK1IS@kabelmail.de>
Message-ID: <9b8ce39c-8043-69a1-f5cd-b5070a6451b1@kabelmail.de>
Date: Fri, 2 Dec 2016 22:33:16 +0100
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Subject: LF: Argo Extensions?
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Dear Alberto,

lots of QRSS operators are successfully using your fine Argo software -=20
so do I. It has been essential for making the LF and MF band accessible=20
to amateur radio. So, first of all, thank you so much for this great=20
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=20
overhaul of
Argo, maybe changing some of its architecture, which dates back to 20=20
years ago..."

So I think it could be a good moment to ask for possible future=20
extensions of Argo=B4s features. Could it be practicable to add something=
=20
like a "notch-function" to the horizontal waterfall display, at its best=20
with an adjustable bandwidth? It should work in front of the ALC=20
function to avoid reduced sensitivity due to strong unwanted signals and=20
should be effective in the non-ALC-modes too. For example: the MF QRSS=20
beacon IQ2MI on 476,180 kHz usually booms in here every evening making=20
it difficult to look at weaker signals within spittig distance to this=20
frequency. In such situations a visual notch would be great! Having an=20
extremly sharp AF notch my Perseus RX does this job rather well (indeed=20
not on its own screen but on the VAC linked Argo screen!) but with many=20
other receivers it isn=B4t possible due to their notches being much to=20
wide for use at real narrow bandwidths.

Another nice gimmick would be to have an alarm function if a signal=20
appears in a given range of frequencies on the running waterfall -=20
perhaps something like an inversion of the notch function. Most of the=20
usual squelch circuits of the upstream receivers would not do this job=20
at weak signals without blanking the whole screen.

Sorry - it=B4s not difficult to create ideas but I can=B4t measure effort=
=20
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


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    <div class=3D"moz-cite-prefix">Dear Alberto,<br>
      <br>
      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:<br>
      <br>
      <font face=3D"Verdana"> <font size=3D"-2">"I have in my future plan=
s,
          after I will have finished a couple<br>
          of projects that are absorbing all of my time at present, to
          do an overhaul of<br>
          Argo, maybe changing some of its architecture, which dates
          back to 20 years ago..."<br>
          <br>
          <font size=3D"-1">So I think it could be a good moment to ask
            for possible future extensions of Argo=B4s 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=B4t
            possible due to their notches being much to wide for use at
            real narrow bandwidths.<br>
            <br>
            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.<br>
            <br>
            Sorry - it=B4s not difficult to create ideas but I can=B4t
            measure effort nor feasibility for their realization. But
            perhaps something is possible ...<br>
            <br>
            Thanks for your ever-lasting inspiration,<br>
            <br>
            gl es vy 73 de<br>
            <br>
            Tom, DK1IS<br>
            <a class=3D"moz-txt-link-abbreviated" href=3D"http://www.qrz.=
com/db/dk1is">www.qrz.com/db/dk1is</a><br>
          </font></font></font></div>
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