LF: Octo soundcard for Raspberry Pi

To:	"[email protected]" <[email protected]>
Subject:	LF: Octo soundcard for Raspberry Pi
From:	Paul Nicholson <[email protected]>
Date:	Mon, 8 Jan 2018 12:11:39 +0000
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Back in stock now on Amazon UK

 https://www.amazon.co.uk/Octo-channel-sound-card-Raspberry/dp/B06Y3PZ6MF

I'm just testing one now using a clean shaped PPS waveform
and it's showing between 200nS and 300nS timing jitter, which
is about 4 times worse than it ought to be, but good enough
for timing coherent reception.

I'm using a TLP2955 opto isolator on the PPS out of the GPS,
fed by a smoothed supply and this seems to help.  Last time
I played with one of these I could get better than 1uS jitter.

--
Paul Nicholson
--

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