[Linrad] Re: M audio

[SM0ERR <ericsson.com; mart.sakalov@xxxxxxxxxxxxxxxx>]

Hi John

I uploaded some files on unmodified M-audio cards (DELTA44 and AP192).

Spectrum mask at 2.510 MHz at -1dB below saturation and 96 kHz
sampling rate
DELTA44_dist.bmp
AP_192_dist.bmp

and on the same plot with some frequency offset.
DELTA_AP_diff.bmp

The AP192 card is using the AK5385AVF A/D converter and should have
9dB better S/(N+D) compared with the AK4524 used in DELTA44
The noise floor is -148.5 dBc and very similar to the modified DELTA44
card.

For 192kHz sampling.
AP192_noise.bmp

73 SM0ERR Mart







On Dec 1, 10:39 am, SM0ERR <mart.saka...@xxxxxxxxxxxx> wrote:
> Hi John.
>
> I have been using the Audiophile 192 together with WSE converter for
> some time now. The card is outperforming the delta44 at 96KHz sample
> rate, however as Alberto pointed out the noise rise / NF at 192KHz is
> +20 dB.
> I will do some tests bypassing the input OP's..
>
> 73  SM0ERR Mart
>
> On Nov 29, 5:30 pm, John <rad...@xxxxxxxxxxxxx> wrote:
>
>
>
> > What a shame, thanks for the reply.
> > John K1VBM
>
> > On Nov 28, 12:18 pm, AdB <adib...@xxxxxxxxx> wrote:
>
> > > rad...@xxxxxxxxxxxxx wrote:
> > > > Greetings and happy holidays.
>
> > > > While browsing M Audio's site,  http://www.m-audio.com/index.php?
> > > > do=products.family&ID=PCIinterfaces  , I noticed some new products,
> > > > among them some 192 KHz sampling rate cards, I think.  Has any one tried
> > > > this interface with linrad? It seem we are always looking for some
> > > > expanded spectrum capture capabilities.  If and when someone tries these
> > > > new products please post your resluts.
>
> > > > 73,
> > > > John K1VBM
>
> > > The Audiophile 192 was tested by Marco IK1ODO in his professional lab
> > > and found not
> > > very suitable for SDR, as when sampling at 192 kHz, the background noise
> > > starts to rise
> > > considerably from 40 kHz up. Not important for audio applications, but
> > > very bad for SDR...
>
> > > 73  Alberto  I2PHD- Hide quoted text -
>
> > - Show quoted text -- Hide quoted text -
>
> - Show quoted text -
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