[Skimmertalk] [RBN-OPS] My Red Pitaya - The mystery continues

Fri Jun 14 14:03:36 EDT 2019

The separate Ethernet switch suggestion is a good one. However, I think there is some misleading information about Ethernet switches possibly being propagated here. There is no issue having your router, RP, and Skimmer Server on the same Ethernet switch, as long as the switch is a Gigabit Ethernet switch with a sufficient packet forwarding fabric. Not all Gigabit switches are created equal. :-) Besides, your Skimmer Server needs a path to the internet to send spots out.

Suggestions/notes:

1) Check the specs on your switch. Your Gigabit switch should be able to achieve 1,488,095 packets per second on each of its ports. If not, find another switch.
2) Your RP and Skimmer Server PC will only be stressing 2 ports on the switch - the ones they are attached to. The port connected to your router won’t be doing much.

Dave KM3T

> On Jun 14, 2019, at 1:36 PM, David Robbins <k1ttt.dave at gmail.com> wrote:
> 
> Yes, that is what I did.  A separate Ethernet switch (NOT hub!) to connect the rp and skimmer computer is what I did and it solved the problem… it also keeps all that data away from your router and anything else on the network that may not like congestion.
>  
> David Robbins K1TTT
> e-mail: mailto:k1ttt at arrl.net <mailto:k1ttt at arrl.net>
> web: http://wiki.k1ttt.net <http://wiki.k1ttt.net/>
> AR-Cluster node: telnet://k1ttt.net:7373 <telnet://k1ttt.net:7373/>
>  
>  
> From: RBN-OPS at groups.io <mailto:RBN-OPS at groups.io> [mailto:RBN-OPS at groups.io <mailto:RBN-OPS at groups.io>] On Behalf Of Andy (KU7T)
> Sent: Friday, June 14, 2019 17:19
> To: RBN-OPS at groups.io <mailto:RBN-OPS at groups.io>
> Cc: skimmertalk; alshovk at dxatlas.com <mailto:alshovk at dxatlas.com>; Vasiliy - K3IT
> Subject: Re: [RBN-OPS] My Red Pitaya - The mystery continues
>  
> This is a good thread. I am expecting my PR in the mail today, so I am very interested.  My intention was to have an additional network switch on the Skimmer PC and the RP, so none of this traffic would go over the “real” network or other switches or routers. From what I am reading there, that is like the best option. That would basically create a dedicated skimmer network switch. Is my assumption correct?  
>  
> Thanks
> Andy
> KU7T
>  
> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10
>  
> From: RBN-OPS at groups.io <mailto:RBN-OPS at groups.io> <RBN-OPS at groups.io <mailto:RBN-OPS at groups.io>> on behalf of Björn Ekelund <bjorn at ekelund.nu <mailto:bjorn at ekelund.nu>>
> Sent: Friday, June 14, 2019 10:10:42 AM
> To: RBN-OPS Reflector
> Cc: skimmertalk; alshovk at dxatlas.com <mailto:alshovk at dxatlas.com>; Vasiliy - K3IT
> Subject: Re: [RBN-OPS] My Red Pitaya - The mystery continues
>  
> My guess is a bandwidth bottleneck or interruptions in your LAN.  
> CW Skimmer Server fails fatally exactly like this on missed or 
> excessively delayed packets. Is the QS1R and the RP connected in the same manner? 
>  
> Björn SM7IUN
>  
>  
> Den fre 14 juni 2019 kl 14:15 skrev Pete Smith <n4zr at comcast.net <mailto:n4zr at comcast.net>>:
> Well, I've got got my Red Pitaya-based Skimmer Server working again.  Just a couple of things that I wonder if anyone can shed some light on.
> 
> 1.  When I set SkimSrv to 192 KHz segments with 5 or more bands, spotting stops entirely, though SkimSrv continues to spawn and drop decoders .  At 96 KHz, anything up to 8 bands continues working fine.  I'm guessing this is some defect in either the receiver software or the hermesintf.dll, because my QS1R-based skimmer performs normally at 7 bands x 192 KHz.
> 
> 2.  Periodically, but irregularly, my Red Pitaya SkimSrv will throw an error and stop working.  The interval can be anything from a minute or two to most of the night.  This is the error:
> 
> <image001.png>
> 
> This does not happen with my QS1R-based system, and I'm wondering if any other Red Pitaya SkimSrv users experience the same thing.
> 
> I should note this is with a 14-bit RP.  Also, despite all this, the RP's performance is excellent, particularly on 40m, where its spots consistently show a 2-7 dB better SNR than the QS1R,  The two are about even on 20M, with the QS1R maybe l;eading by a dB or two.
> 
> -- 
>  
> 73, Pete N4ZR
> Check out the Reverse Beacon Network 
> at <http://reversebeacon.net> <http://reversebeacon.net/>, now 
> spotting RTTY activity worldwide. 
> For spots, please use your favorite 
> "retail" DX cluster.
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