[hpsdr] Fwd: Re: pihpsdr

[dl2hbj at gmail.com]

Hi Bob,

I had a similar problem which was gone with a more powerfully power supply.

Jan, DL2HBJ

> Am 05.02.2017 um 09:31 schrieb Bob Cowdery <bob at bobcowdery.plus.com>:
> 
> ***** High Performance Software Defined Radio Discussion List *****
> 
> I've got it running on the 7" touch screen now, looks fantastic but unfortunately didn't fix the blip even after I stopped the xrdp service.
> 
> pihpsdr shows about 35%, Xorg 20% and the rest very little. Free mem about 520K.
> 
> 73 Bob G3UKB
> 
>> On 2/5/2017 1:24 PM, Bob Cowdery wrote:
>> ***** High Performance Software Defined Radio Discussion List *****
>> 
>> Only 48K works, higher rates are not intelligible. I can run 384k
>> normally so you are probably correct that RDP is putting extra load on
>> the pi. I do have the standard 7" screen and enclosure which I plan to
>> set up so I will let you know how I get on with that.
>> 
>> Bob
>> 
>> 
>>> On 2/5/2017 1:15 PM, John Melton wrote:
>>> ***** High Performance Software Defined Radio Discussion List *****
>>> 
>>> 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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