[Skimmertalk] new red pitaya

Mon Jun 3 19:21:07 EDT 2019

Well, round about comparison. compared old rp with qs1r after doing front
end jumper change to bypass attenuator and they were almost identical. then
added matching transformer, but didn't compare it again to the qs1r. now I
compared the old rp to the new one and the new one seems to get more spots,
but one spots that they both make the snr is almost always the same or maybe
1db better for the new one.

David Robbins K1TTT
e-mail: mailto:k1ttt at arrl.net
web: http://wiki.k1ttt.net <http://wiki.k1ttt.net/> 
AR-Cluster node: 145.69MHz or telnet://k1ttt.net:7373

From: Andy KU7T [mailto:ku7t at ku7t.org] 
Sent: Monday, June 03, 2019 21:46
To: Bob Wilson, N6TV; Dave Robbins, K1TTT; SkimmerTalk Reflector
Subject: RE: [Skimmertalk] new red pitaya

Bob,

Thanks for writing this up.  My main questions are: 

How good is it compared to the old pitaya or QSR1 (SNR difference, more
spots, .)?  

Do we still need a preamp for higher bands?

Are you running it currently at N6TV-#?

Thanks and 73

Andy

KU7T

Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986>  for Windows
10

  _____  

From: Skimmertalk <skimmertalk-bounces at contesting.com> on behalf of Bob
Wilson, N6TV <n6tv at arrl.net>
Sent: Monday, June 3, 2019 1:44:30 PM
To: Dave Robbins, K1TTT; SkimmerTalk Reflector
Subject: Re: [Skimmertalk] new red pitaya 

Yes, just about everything you need to know is documented here:

https://pavel-demin.github.io/stemlab-sdr-notes/alpine/

Be sure to scroll down to the bottom where he explains how to change the
default password.

The SD card image located on that page seems to be the only OS image that
works with the new board.  I have not found any other version of Alpine
Linux or Ubuntu that works.

The trick is to get maximum disk space on the microSD card that comes with
the unit (so you have room to install extra Linux goodies like Python and
Emacs).  The xadc shell script <https://www.kkn.net/~n6tv/xadc-new.sh> to
display the CPU temperature works fine too.

To get max space, delete all the partitions on the microSD card first,
using Windows Disk Manager, then recreate one large primary partition, then
reformat the entire card as FAT32 (not FAT) using Windows.  I think that's
why WC2L had problems, as well as a bad microSD card.

Finally, unzip the directory structure onto the empty 4GB card instead of
trying to use Win32DiskImager, which only is for Ubuntu .img files, not
Pavel's Alpine Linux Zip files, and the imager also recreates the wrong
partition structure (118MB Primary partition on a 4GB card).

CWSL_Tee <https://github.com/HrochL/CWSL> works fine, the same as before,
so you can listen to the STEMlab SDR with HDSDR while it is skimming.  Be
sure to change CWSL_Tee.cfg to request HermesIntf_XXXX.  I don't think it
matters which version you use of CWSL_Tee or HermestIntf.dll that you
used.  EXTIO_CWSL.dll looks a bit newer than the original.

In the past I also had to have QS1RIntf.dll in the Skimmer directory even
though it is not being used.

I ran 7 bands at 192 kHz on a 1 Gbps Ethernet switch with CAT6 STP cables
with no problem.  I assume you are not connecting by WiFi.

I plan to run about 14 bands at 192 kHz when I get all done with it.  Note
that by default the SDR-Receiver-HPSDR generates TWO mac addresses and two
IP addresses for the same board, 8 slices each, and these can be treated as
two independent SDR receivers.  So you can run CW Skimmer and RTTY Skimmer
on one IP address, and just CW Skimmer on the second (to avoid CPU
overload).  The second MAC address is the same as the first with FF for the
2nd-to-last byte, e.g. if you see SDR-F01234.local on the sticker, one
skimmer should use HermestIntf_1234.dll and the second HermesIntf_FF34.dll
(from separate skimmer directories, running SkimSrv.exe and SkimSrv2.exe,
CWSL_Tee.dll and CWSL_Tee2.dll).

One can access both IP addresses from a web browser and see the same menu.
My router sees one as http://sdr-f01234.local but the other as
http://sdr-f01234-6.local, for some reason.  These names aren't registered
unless you run sdr_receiver_hpsdr/start.sh automatically by copying it to
the root directory (on Windows), or copying to /media/mmcblk0p1/ using the
Linux command line.  Don't forget to use the "rw" and "ro" commands before
and after making file changes, or lbu commit -d after making configuration
changes, like the password.

73,
Bob, N6TV

On Mon, Jun 3, 2019 at 3:40 AM David Robbins <k1ttt.dave at gmail.com> wrote:

> Yes, they are arriving in the states.  I think I have mine working, wc2l
> not
> so much.  I just want to find out what is the proper set of images, dll's,
> etc to get them running just with cw skimmer server and rbn aggregator.
>
>
>
> Right now I am using:   stemlab-sdr-alpine-3.9-armv7-20190411.zip
>
> I had also tried: red-pitaya-alpine-3.9-armv7-20190527.zip  but that
didn't
> seem to work at all
>
> I also updated to:  HermesIntf-18.5.22.zip
>
>
>
> I was a bit confused because I expected to find images to write on the sd
> card instead of just copying files, but it seems to work so I won't argue
> with that part of it.  but are those the best rp image and hermes
interface
> dll's to use?
>
>
>
> Should those work with cwsl_tee 2.0.0.1??  or is there a newer version of
> that I should use??
>
>
>
>
>
> Right now I have mine running with 5 bands at 96khz, when I tried 7 at
> 192khz I think I was overloading my switch that also has the older rp
> running rtty skimmer server on 5 or 6 bands though it to a different
> computer. I have some better switches and cat-6 cables coming to see if
> that
> helps.
>
>
>
> 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: 145.69MHz or  <telnet://k1ttt.net:7373>
> telnet://k1ttt.net:7373
>
>
>
>
>
> _______________________________________________
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