Red Pitaya SDR update

[Jeff Scaparra]

Looks like we can utilize an external clock but it wouldn't be 10MHz.

http://wiki.redpitaya.com/index.php?title=External_ADC_clock
http://forum.redpitaya.com/viewtopic.php?f=9&t=17

On Wed, Nov 11, 2015 at 7:20 PM, Jeff Scaparra <jeff at scaparra.com> wrote:

> Has anyone evaluated the clock on the RP or used it for JT65? Is it good
> enough? Is there a way to provide a 10MHz reference that is common on some
> other radios? I always wanted a good reason to build a rubidium clock
> source. :) I do believe the Red Pitaya will be a better radio. 14 bit ADCs
> and Direct Sampling should be able to have better dynamic range and less
> noise. Some shielding will be needed for the Red Pitaya as I get much
> better results with a metal cover over it (probably just picking up noise
> in my "shack").
>
> On Wed, Nov 11, 2015 at 2:50 PM, Terry N4TLF <n4tlf at wb4jfi.com> wrote:
>
>> I am definitely interested Martin.  After I straighten out a few things,
>> I can do both the LF and RP.  Right now, I have so many different versions
>> of PowerSDR and Quisk on so many computers, it’s hard to keep track!
>>
>> I am glad that you are taking charge of this!  The Red Pitaya is
>> definitely a wonderful SDR platform.  I wish the HPSDR guys would get more
>> interested in it, as I think the RP platform would be better than the
>> present Hermes Lite.  Of course, the RP costs a little more, but look at
>> what the hardware can do!
>> 73, Terry, N4TLF
>>
>>
>> *From:* Martin <dcmk1mr2 at gmail.com>
>> *Sent:* Wednesday, November 11, 2015 1:35 PM
>> *To:* Tacos <tacos at amrad.org>
>> *Subject:* Red Pitaya SDR update
>>
>> Thanks to Pavel Demin, the Red Pitaya now has a couple of SD card images
>> to support a wide array of interesting and useful software.
>>
>> There's a dual receiver single transmitter
>> <http://pavel-demin.github.io/red-pitaya-notes/sdr-transceiver-hpsdr/>
>> configuration that acts like a HPSDR network interface with dual receivers
>> and a transmitter.  This opens up the possibility of using PowerSDR, Quisk,
>> an Android app or other software.  It seems like diversity reception works
>> in PowerSDR.
>>
>> I'd like help design and build the rest of the stuff it takes to turn the
>> RP into a robust, portable transceiver.  I've never done this before and
>> hope there's others on this list who would be interested in joining me.  We
>> have some great resources in the club although I know everyone is time
>> constrained.  I'm willing to commit significant time and effort to the
>> project.
>>
>> I realize there's time sensitive work going on in the AMRAD Low Frequency
>> world. That said, I'd like to propose this as a AMRAD project to follow on
>> the Charleston receiver as time permits.  As most of the digital heavy
>> lifting has been done it's mostly a matter of building the analog
>> transmit/receive chain and ancillary stuff.
>>
>> Terry N4TLF has done testing on the RP LF performance and found it too
>> noisy to be useful but perhaps there's a fix.
>>
>> The Red Pitaya <http://store.redpitaya.com/red-pitaya-board.html> is now
>> $238 so an affordable, complete HF SDR transceiver should be possible.
>>
>> This could be a great project for the club that hopefully attracts
>> interest and new members.
>>
>> So - anyone else in?  What do you think?
>>
>> 73 Martin W6MRR.
>>
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>> ------------------------------
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>>
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>>
>
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