[Skimmertalk] Red Pitaya Input 2

[Wes Cosand]

The ability to assign Input 1 and Input 2 to different receivers would be a
significant advantage.  But I have forgotten what little Linux I was
supposed to have known.

When I try to edit the line

sdr-receiver-hpsdr 1 1 1 1 1 1 &

to read


sdr-receiver-hpsdr 1 2 1 1 1 1 &

with the Nano editor I get an error: "Read Only File"
so I type


On Tue, Aug 15, 2017 at 1:10 PM, Bob Wilson, N6TV <n6tv at arrl.net> wrote:

> Dan,
> ...
>
> If you do need to use INP2, note that you'll have to move the jumpers
> across pins 2 and 5 on INP2 just as you did on INP1, to bypass the built-in
> attenuator.  There are separate attenuators jumpers for each input.
>
> Jan's suggested edit is correct, though I don't see a file named
> */sbin/discovery.sh* on my 0.97 image.
>
> You can edit the *start.sh* file using the *nano* full screen editor (or
> *vi* if you're more comfortable with that one), e.g.
>
> nano /opt/redpitaya/www/apps/sdr_receiver_hpsdr/start.sh
>
> Note that you have the option to use input 1 or 2 on each of the 6
> receivers that it starts, giving you the option to use INP1 for the low
> bands and INP2 for the high bands, if you have two antennas.
>
> Use Ctrl-X to exit the editor.  It will prompt you if you want to save your
> changes.  Then reboot.
>
> I assume you already edited or replaced */etc/rc.local* after you
> reformatted the microSD card, otherwise the SDR won't start automatically.
> The Red Pitaya 0.97 needs to have these lines to start the SDR receiver
> automatically every time it powers up:
>
> # Start the SDR Receiver compatible with HPSDR at boot time
> cat /opt/redpitaya/www/apps/sdr_receiver_hpsdr/sdr_receiver_hpsdr.bit
> >/dev/xdev
> cfg
> . /opt/redpitaya/www/apps/sdr_receiver_hpsdr/start.sh
>
> If you're not comfortable trying to cut and paste these lines into the file
> yourself, there's an another way.  Just enter these commands to save the
> old *rc.local* file, fetch a new one with the required commands already in
> place, and mark it executable:
>
> cd /etc
> mv rc.local rc.local.old
> wget http://www.kkn.net/~n6tv/rc.local
> chmod +x rc.local
>
>
> 73,
> Bob, N6TV
>
> On Tue, Aug 15, 2017 at 1:19 AM, Jan ok2zaw <honza at ok2zaw.com> wrote:
>
> > Hi Dan!
> >
> > I do have the same problem at OL7M. When I run Spectrum analyzer, there
> is
> > no sognal on IN1. PIC: http://www.ok2zaw.com/SDR/spectal.png  I used IN2
> > but still board was "unstable". I do have another one which works great!
> > I am sending the first one today back - I bought it directly on RP web. I
> > think the best way is to write to support.
> >
> > Anyway, there is way to switch to IN2:
> >
> > /sbin/discovery.sh
> >
> > /opt/redpitaya/www/apps/sdr_receiver_hpsdr/start.sh
> >
> > To select IN 2 for all six receivers you'll need to replace
> >
> > sdr-receiver-hpsdr 1 1 1 1 1 1 &
> >
> > with
> >
> > sdr-receiver-hpsdr 2 2 2 2 2 2 &
> >
> > Vy 73 Jan OK2ZAW / OL9A / OL7M
> >
> >
> > S pozdravem Jan Šustr
> > Regards Jan
> >
> > http://www.ok2zaw.com
> > http://www.qro.cz
> >
> >
> >
> > -----Original Message-----
> > From: Skimmertalk [mailto:skimmertalk-bounces at contesting.com] On Behalf
> > Of Dan Downard
> > Sent: Tuesday, August 15, 2017 12:48 AM
> > To: skimmertalk at contesting.com
> > Subject: [Skimmertalk] Red Pitaya Input 2
> >
> >
> > I configured my Red Pitaya per all of the excellent guidelines on this
> > reflector.  Thanks to all.  Everything was working great, but now I have
> a
> > problem:
> >
> > Something happened to the microSD card that came with my unit.   I bought
> > a new microSD card and formatted it using the .97 image.  Everything
> > appears to be working but no signals, and no waterfall on HPSDR, not even
> > background noise, are present.
> >
> > I tried loading the Spectrum Analyzer app and noticed that Input 1 was
> > dead but Input 2 seemed to be OK.  I am assuming that something happened
> to
> > Input 1!
> >
> > Could someone tell me how to make Input 2 the primary receiver/antenna
> > port?  I saw a Ubuntu script somewhere but can’t find it.
> >
> > Has anyone else had this problem?  I bought the unit from Mouser and am
> > going to contact them once I verify the problem.
> >
> > Dan K4FXN
> >
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-- 
Wes Cosand
6299 Route 413
PO Box 349
Pipersville, PA 18947