Re: LF: Testing Audioinjector Octo with RPi3

["Stan, W1LE" <stanw1le@verizon.net>]

Hello Paul,

 Can multiple 2 channel audioInjectors be stacked up on the Raspberry 
Pi, to get 4 channels ?
Can a single 2 channel audioinjector be used with a USB 2 channel audio 
card, for 4 channels ?
How about 2 separate USB audio cards for 4 channels of input ?

How are the 3 needed channels used ?  GPS/PPS, E filed antenna, and H 
field antenna ?
Slowly getting started...

Stan, W1LE    Cape Cod   FN41sr


On 2/25/2018 1:32 AM, Paul Nicholson wrote:
> A four day run of the Octo sampling at 48k/sec with PPS from
> a neo-m8t.   The PPS jitter is around 30nS most of the time,
>
>  http://abelian.org/vlf/tmp/180225a.png
>
> The Octo sample rate is also staying quite constant too.
> The GPS has a poor view of the sky.
>
> The Octo is working well at 48k/sec.
>
> No feedback from the Flatmax Octo forum on the glitches at
> 96k/sec.  Even if I keep the input level below 1.3V it looks
> like the S/N is poor.   As it stands, it's not really usable
> at that rate.  My LF rx project is stalled without a 3-channel
> 96k/sec capture.
>
> Later today I'll put the Octo back to 96k/sec for another play.
>
> --
> Paul Nicholson
> --