Interesting FPGA board

Tue Jan 11 01:17:11 EST 2022

I got burned by my kickstarter Red Pitaya. It has a huge (25dB over noise
floor) spike at 2.3MHz, and then harmonics. The signal level does not
depend on the input range, so it must be introduced after the input stage.
It makes the board completely useless for measuring small signals. I
noticed that others also had similar problems and tried to mitigate them,
but I haven't yet tried to investigate it.
That's a pity, because it is a very nice and capable board.

Jacek
kw4ep

On Tue, 11 Jan 2022 at 01:03, Martin <dcmk1mr2 at gmail.com> wrote:

> I think it would be fun to turn a Pluto Plus
> <https://github.com/plutoplus/plutoplus> into a POE data radio.  It would
> be great to use 1296 MHz or 10 GHz.  It seems doable and would be fun to
> try.  It would need a RF
>
> The Red Pitaya uses a Zynq 7010 and can do this
> <http://pavel-demin.github.io/red-pitaya-notes/>.  I think a 7010 would
> be up to the task.  The Lime SDRs would be great but who knows when they
> are going to arrive.
>
> I will explore Reddit RPAN streams .
>
> --Martin
>
> On Mon, Jan 10, 2022 at 2:22 PM Samudra Haque <samudra.haque at gmail.com>
> wrote:
>
>> The zynq processor on the avnet is still supported freely in all the
>> current Vivado builds. This is based upon several cycles of delete and
>> installation on my poor laptop and also another Linux computer. What I am
>> annoyed is that the minized support ducks so I wrote my own mini board
>> definitions for a while  where i figured put 7010s is great and I can write
>> Vivado HDL/RTL directly to connect directly.
>>
>> But Terry what errors are you getting if you just install Vivado directly
>> and then start a project selecting just the basic part number? It's listed
>> as being free to license?
>>
>> On Mon, Jan 10, 2022, 17:11 n4tlf <n4tlf at wb4jfi.com> wrote:
>>
>>> I have several different FPGA boards and SDRs.  While I have been
>>> partial to Xilinx (and Verilog) in the past, I have started playing with
>>> Altera as well - thanks to some S100 FPGA boards.
>>>
>>> My biggest issue with Xilinx is their tools availability.  Can one run
>>> Vivado as a hobbyest for not a lot of money?  That stopped me a few years
>>> ago, I could run the older tools associates with Spartan FPGAs, but newer
>>> FPGAs required Vivado, which was either hobbled so much it couldn't do
>>> much, or it was fairly costly.
>>>
>>> The Avnet MiniZED came with a Vivado one-use limited license, but it
>>> expired after one year, and won't help with a re-installation on a new
>>> computer.
>>> In addition to the old Spartan-series FPGAs, I have:
>>> Avnet Spartan 6 LX9 FPGA board
>>> Mimas V2 Spartan 6 FPGA board
>>> two Red Pitaya boards with Zynq
>>> Avnet MiniZed with Zynq
>>> Digilent ZYBO development board with Zynq
>>>
>>> I also have a Line SDR and Lime SDR Mini (uses Altera FPGAs)
>>>
>>> I almost purchased the Analog Devices Adalm-Pluto a few times (another
>>> Zynq device), but it's frequency coverage STARTS at 325MHz, a range that
>>> I'm less interested  in.
>>>
>>> There is a nice book on the Zynq FPGAs, maybe available from Xilinx,
>>> called "The ZYNQ Book" ISBN 978-0-9929787-0-9.  www.zynqbook.com
>>>
>>> So, is Vivado available to hobbyests like me?
>>>
>>> Terry, N4TLF
>>> On 1/10/2022 11:59 AM, Samudra Haque wrote:
>>>
>>> Thanks Martin, it would be nice to do that. I recently accidentally
>>> discovered and broadcast a Reddit r/shortcircuit video stream of the fpga
>>> testbed so, that system has great capability like live  comments and stuff.
>>> But it does take a monitor and a dedicated setup. Have you the time to
>>> explore Reddit RPAN streams ?
>>>
>>> Michael Chisena and I have talked a lot of about streaming instructional
>>> electronics over thr new fangled systems... and I also want to ask of
>>> anyone else is interested? Then it could be a nice system to make if we
>>> used the OBS system ro switch video streams of the presenters from time to
>>> time into a zoom channel to support a group learning pathway .
>>>
>>> Zoom also works and I have a few cameras that can be switched (selected)
>>> on demand.
>>>
>>> But if group teaching is not required. I can and want to start
>>> collaboration in a technical education group towards homebrew digital and
>>> analog systems.
>>>
>>> You may have noticed the booboo created at ORI, they just find out that
>>> their matlab code can't be ported to HDL without the extensive HDL
>>> converter license. Surprising they didn't know this earlier and stay away
>>> from that pathway. They just put out an email on this.
>>>
>>> It is absolutely possible to write communication modulation and
>>> demodulation code as RTL and C/C++ (however ineffcient) without matlab!
>>> Even BASIC could be used to do a BPSK chain but of course the issues are
>>> with the matlab handy filters... I think.
>>>
>>> So should we not  try to learn about this stuff all together?
>>>
>>>
>>>
>>> On Sun, Jan 9, 2022, 00:42 Martin <dcmk1mr2 at gmail.com> wrote:
>>>
>>>> Hi All & Happy New Year!
>>>>
>>>> Have you considered the ADALM-PLUTO?  $229 from Digikey, 7010  (vs
>>>> 7007), ships today, has more interesting stuff and can be reloaded with
>>>> original software if SDR is needed.  I know it's not a dev board but people
>>>> do tack leads to spare GPIO pins.
>>>>
>>>> @Samudra, would you like to teach a little about FPGAs?  There is
>>>> interest with the 50 MHz and Up club in Sunnyvale.  I'm too rusty to lead
>>>> and it's not a bad commute over Zoom.
>>>>
>>>> 73 Martin W6MRR
>>>>
>>>> On Sat, Jan 8, 2022 at 9:10 PM Samudra Haque <samudra.haque at gmail.com>
>>>> wrote:
>>>>
>>>>> So it may be possible to post this project to Avnet Minized which is
>>>>> also zynq 7010s  based
>>>>>
>>>>> On Sun, Jan 9, 2022, 00:04 Terry Fox <tfox at knology.net> wrote:
>>>>>
>>>>>> Regarding today's discussion on tacos about FPGAs, this (Blackboard)
>>>>>> looks rather interesting.  It's not costly, and has some neat peripherals.
>>>>>>
>>>>>> Real Digital Signal Processing - Hackster.io
>>>>>> <https://www.hackster.io/adam-taylor/real-digital-signal-processing-0bea44?mc_cid=b16a7a12ba&mc_eid=65c2c46a0c>
>>>>>>
>>>>>> Welcome to Real Digital <https://www.realdigital.org/>
>>>>>>
>>>>>>
>>>>>> _______________________________________________
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-- 
Given a choice between two theories, take the one which is funnier
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