[hpsdr] PureSignal for HPSDR/Penelope/Mercury

[George Byrkit]

Jim,

(no disrespect meant...)

I think that you would discover that it is way more than a second Mercury being plugged in.  This was discussed on this list in the far-distant-past (like before 2015?)  That's roughly when this was all discussed.  I think that by reading the archives (if they are intact), you will answer your own questions.

This would be for you to attempt, I think.  Don't hold your breath for others to try.

73,
George K9TRV

-----Original Message-----
From: Hpsdr <hpsdr-bounces at lists.openhpsdr.org> On Behalf Of Jim Sanford
Sent: Sunday, May 28, 2023 9:12 AM
To: hpsdr at lists.openhpsdr.org
Subject: Re: [hpsdr] PureSignal for HPSDR/Penelope/Mercury

***** High Performance Software Defined Radio Discussion List *****

Good information, thanks.

I would GLADLY install a second Mercury to do this.  Since I have 
everything referenced to GPSDO, I would think the phase matching would 
be close.  Bus limitations would be an issue, no doubt. Would love to 
see an attempt.

Wonder if a single Mercury could be set to switch to a receive input 
coming off the PA sample port, only requiring 1 Mercury board.  (I THINK!)

Thanks & 73,

Jim

wb4gcs at amsat.org


On 5/28/2023 07:44, George Byrkit wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> While it might be technically possible, there are lots of hurdles to
> overcome, and PureSignal was not designed/implemented to work on the Mercury
> receiver.
>
> 1) PureSignal needs an additional phase/clock-synchronous receiver channel
> to get the feedback to correct the signal.  Mercury only has ONE receiver
> channel.  You'd have to hand-stack multiple Mercury boards to begin with...
>
> 2) PureSignal needs more FPGA memory space for code and everything.  A
> Cyclone III doesn't really have that available for you.
>
> 3) perhaps bus timing and all are also in the way.
>
> You should reach out to Dr Warren Pratt, NR0V, who implemented PureSignal.
>
> 73,
> George Byrkit, K9TRV
>
> -----Original Message-----
> From: Hpsdr <hpsdr-bounces at lists.openhpsdr.org> On Behalf Of Michael Carey
> Sent: Sunday, May 28, 2023 4:57 AM
> To: hpsdr at lists.openhpsdr.org
> Subject: [hpsdr] PureSignal for HPSDR/Penelope/Mercury
>
> ***** High Performance Software Defined Radio Discussion List *****
>
>
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