[hpsdr] laptop recommendations and linux observations

[Erik Anderson]

Just a random voice, but would swapping out the kernel on an ubuntu system
with a realtime linux kernel help with the slower machines?

On Thu, Oct 28, 2010 at 5:25 PM, Erich Heinzle <vk5hse at yahoo.com> wrote:

> ***** High Performance Software Defined Radio Discussion List *****
>
> I will be getting a P4 2-3GHZ box with ~1GB of RAM in due course for little
> or no cost, but to allow mobile operation I am thinking about a laptop.
>
> Can anyone on the list confirm if something along the lines of:
>
> Compaq 620 XU333PA
> CPU: Intel Core Duo T4500
> RAM: 2GB DDR3
> HDD: 320GB SATA
> Graphic: Intel GMA 4500MHD
> Screen: 15.6” LED (1366 x 768)
>
> would be ok for GHPSDR or PowerSDR
>
> The screen res may be the only problem if the CPU would be OK.
>
>
> So far, I've figured out that:
>
> a netbook 1.6GHz 1GB RAM is unable to run ghpsdr under ubuntu 9.1 and do
> anything useful
>
> a desktop athlon ~2GHz a few years old now is unable to run ghpsdr under
> ubuntu 9.1, producing choppy meaningless audio, a fairly valid looking whole
> of HF spectrum, but can't generate a meaningful 192kHz wide spectrum for
> tuning.
>
> although the Athlon managed with the SDR-1000 and powerSDR back in the day
>
> Of note, and possibly of interest to HPSDR users generally:
>
> OzyBulkRead read failed -1
>
> errors seem to be due to slow USB ports.
> The Athlon motherboard USB port did not raise this eror, but the ports on
> the front of the Athlon tower did.
> The netbook ports did not raise this error.
> So, older PCs may struggle to handle the USB data rates.
>
>
> Thanks for any advice
>
> Erich
> VK5HSE
>
>
>
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