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No solution as yet other than to use portable laptop on battery.
The problem has been fixed by one user.
https://www.eevblog.com/forum/rf-microw ... to-sdr/25/
Look about 2/3 down the page. You can search the page for his user name "Taucher" to take you to the relevant post.
Hope this helps. I'll be modding mine as soon as the warranty is out as I have same problem, but it is not too intrusive at the minute as I seldom disconnect the Tx port while it is in use.
I'll try it on one of mine and see if it behaves any better.
Hello to all PlutoSDR owners,
I have replaced internal oscillator in Pluto. I have used ASTX-13-C-40.000MHz-I05-T. Pluto is more stable then before and I am able to make SSB qso now without drifting. No need GPS stabilisation I think.
I have had no experience with SMD removing from PCB, so change was little bit dramatical, but I have done it and Pluto works.
Now is Pluto fully usable for QO-100.
Thanks to Mathias DL9BQ for usable informations - look at his qrz.com pages.
Have a nice day de Pavel OK1PHU
Mouser UK have them in abundance
https://www.f1te.org/index.php/realisat ... dalm-pluto
Don't like Mousers £12 delivery charge though!!
- Screenshot_20191001-212846_Twitter.jpg (540.76 KiB) Viewed 879 times
In my case my main PC refused to work but my laptop was fine.
Yep that's my twitter post 2 above this, the pluto is working really nicely on QPSK/8PSK and 16APSK. As Mike says you just shove an RTMP stream at the unit over IP and out comes RF.
In my config in the VMIX software I have;
URL : rtmp://220.127.116.11:7272/,437,DVBS2,16APSK,333,12,
Pass : ,M0EYT,
The parameters are fairly obvious, and should be in exactly the format described above. The only think I needed to tweak in VMIX was the video output setting so it basically matches the symbol rate, else overflows start to appear.
With the pluto the RF output on 2.4G is fairly low, I think from memory I measured -18dBm average with a 333Ksps QPSK, an old Avantek gain block takes this up to 20mW then another amp up to a watt where its fed to a PE1RKI amp for about 22watts at the feed, easily enough to get 333Ksps QPSK up to the satellite with a 1.2m offset dish. Now the setup runs on the bench, I'll put a USB <> Ethernet adapter onto the Pluto, and build PA/SDR etc into my outdoor unit along with WB/NB source switching.
Pic above shows the nice clean QPSK generated by the pluto.
Hope to see you on the w/b transponder,