[hpsdr] pihpsdr

John Melton john.d.melton at googlemail.com
Sun Feb 5 05:15:34 PST 2017


Hi Bob,

Do you get the blip regardless of sample rate?

I suspect that the problem is caused by running RDP but not 100% sure as 
I cannot test because I do not run any Microsoft software here.

-- John


On 05/02/17 12:40, Laurence Barker wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> I wasn't getting that on my USB based Ozy. I did find that the behaviour was
> sample rate and noise blanker setting dependent - if you selected too high a
> sample rate it would stop functioning. With my RPI3 I was able to get 192K
> samples per second, but with no NB selected; you needed a lower sample rate
> with NB.
>
> Is the behaviour you get affected by sample rate, NB, AGC etc selection?
>
>
>
> Laurence Barker G8NJJ
>
> laurence at nicklebyhouse.co.uk
>
> -----Original Message-----
> From: Hpsdr [mailto:hpsdr-bounces at lists.openhpsdr.org] On Behalf Of Bob
> Cowdery
> Sent: 05 February 2017 10:46
> To: hpsdr at lists.openhpsdr.org list <hpsdr at lists.openhpsdr.org>
> Subject: [hpsdr] pihpsdr
>
> ***** High Performance Software Defined Radio Discussion List *****
>
> Hi all,
>
> Thanks John for a very nice piece of software. Just put it on one of my pi
> 3's running over RDP (latest production version). Listening to 40m as I
> write this.  I have a basic Metis system so obviously running the 'old'
> protocol. I do notice there is a rhythmic blip every 2-3 seconds which shows
> as evenly spaced horizontal bars on the waterfall and a rise in the noise
> floor on the spectrum. I don't get this with other software. Sounds like a
> buffer alignment problem or if this is just me then anyone any idea what
> might cause it.
>
> 73's Bob G3UKB
>
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