[Skimmertalk] new red pitaya

[Bob Wilson, N6TV]

I think you mean the Elecraft XG3

https://elecraft.com/products/xg3

I didn't know it could generate RTTY.  That's nice.

What was the conclusion of your tests?

73,
Bob, N6TV


On Mon, Jun 3, 2019, 5:21 PM Jeff Blaine <KeepWalking188 at ac0c.com> wrote:

> Trying to figure out the impact of changes to my skimmer setup drove me
> nuts as there was no stable method to test at a system level the mods.
> Eventually I found a solution - the Elecraft KG3 sig gen.  A feature of
> that device is the ability to program CW (and RTTY) including a CQ
> sequence which can be read by the skimmer.
>
> Given the stable source, the skimmer's SNR is stable to the dB level and
> precise incremental change  observations are possible.
>
> 73/jeff/ac0c
> alpha-charlie-zero-charlie
> www.ac0c.com
>
> On 6/3/19 6:50 PM, Bob Wilson, N6TV wrote:
> > On Mon, Jun 3, 2019 at 2:46 PM Andy KU7T <ku7t at ku7t.org> wrote:
> >
> >> How good is it compared to the old pitaya or QSR1 (SNR difference, more
> >> spots, …)?
> >>
> > I little bit better SNR, but the main advantage is 16 192 kHz slices vs.
> 8
> > max with the old board, plus no need for a 14:1 Impedance Transformer.  I
> > will say at first pass the new board seemed to be reading signals 1
> S-Unit
> > LESS than the old board, feeding both from the same antenna/preamp via a
> > passive splitter.  But the noise level was reduced even more, so the S/N
> > went up.
> >
> >> Do we still need a preamp for higher bands?
> >>
> > In theory, no, but I think I'll keep mine in line anyway as my VE3DO loop
> > isn't very sensitive above 40m.
> >
> >> Are you running it currently at N6TV-#?
> >>
> > Not yet.  Soon.  I just did brief standalone testing.  I have to do some
> > reconfiguration to move the new board to my old case.
> >
> > I do wish the RBN Aggregator could be enhanced to auto-start two
> > independent instances of CW Skimmer Server, something that is required to
> > make full use of all 16 slices of the new board.  Skimmer Server /
> > HermestIntf only permits 8 bands max per instance, so you need two
> > instances, each connecting to a different MAC address.  Aggregator can
> only
> > start one CW Skimmer Server.   I always have to start the second one
> > manually.
> >
> > 73,
> > Bob, N6TV
> >
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