[Skimmertalk] Red Pitaya + Skimmer Server only receiving on lowest band

[Bob Wilson, N6TV]

Hi Carsten,

The only guess I have is that the wrong app is running in the Red Pitaya
(SDR transceiver instead of SDR receiver?) , or somehow it has the wrong
command line arguments.

You can check if the correct SDR app is running with proper parameters by
typing the Ubuntu command:

ps aux | grep -i sdr


And you'll see something like this in response, indicating the process is
running with all eight receiver slices on RP input 1:

root   1571 40.3  0.0   9076    32 ?        Sl   Sep20 556:54 /opt/redpitaya
/www/apps/sdr_receiver_hpsdr/sdr-receiver-hpsdr 1 1 1 1 1 1 1 1
root   2215  0.0  0.1   3732   540 pts/0    S+   22:36   0:00 grep
--color=auto -i sdr


(Ignore the last line, that's the grep command itself).

If that looks OK, check that all bands are selected in the CW Skimmer
Server UI, which defines the center frequencies of each receiver.

Failing that, recheck that you have followed all the steps here, or try an
older version of HermestIntf and let us know what you discover.

http://hamsci.org/n6tv-red-pitaya-combine-cw-rtty-skimmer-hdsdr

73,
Bob, N6TV

On Sun, May 20, 2018 at 5:41 AM, Carsten Steinhoefel <
carsten at steinhoefel.co.uk> wrote:

> After repairing my QS1R failed (so far), I have now got myself a Red
> Pitaya.
>
>
> It has got v0.98 of the image and I have installed the Receiver for HPSDR.
>
>
> Setting up Skimmer Server with just HermesIntf (tried 17.7.6 and latest
> version), I only get spots on the lowest band configured. So if I select
> say 160/80/40, I only get 160m spots and if I do 40/20/15 I get only 40m
> spots etc.
>
>
> The same behaviour with CWSLTee. In HDSDR I can receive fine on the lowest
> band selected in Skimmer Server. On all other bands (the correct
> frequencies are shown), there is no signal at all. The display goes down to
> -399dBFS.
>
>
> If I select fewer bands the network bandwith goes down as expected (seen
> in Task Manager)
>
>
> Same behaviour on 2 Windows 10 PCs (one with the latest versions of all
> software involved, one with Skimmer Server 1.5 and an older CWSLTee that
> was already on).
>
>
> Any ideas?
>
>
> 73 Carsten G0SYP