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Sound card input bandwidth Samsung NC-10

J

Joerg

Jan 1, 1970
0
Gents,

Wanted to do some electrical measurements (FFT) using the sound card of
my li'l travel companion Samsung NC-10. This time higher up but then I
found out that the sensitivity rolls off around 6kHz (-6dB). Couldn't
find any hints on what goes on and whether or how that can be fixed. Any
ideas?

The sound card of a larger laptop goes to 23kHz and the desktop to
around 21kHz.
 
J

Joerg

Jan 1, 1970
0
some hidden setting that set it for lowpass filtered mic input instead
of full bw line input?

That what I am hoping for, that someone knows a secret hook. The sound
card and OS settings for these machines are majorly dumbed down compared
to the good old days.
 
J

Joerg

Jan 1, 1970
0
Jan said:
It seesm Samsung makes crap these days.
My expensive new 3D TV as an example.
BTW the audo is shit too, sound like they cut below 200 Hz.
Avoid them.


Can't say that. This netbook is otherwise very nicely made. Samsung is
one of the very few companies that managed to do what only Compaq could
really do in the old days (roughly 20 years ago): Build a portable
computer that can go more than 5h per charge. The Samsung can actually
do 8h. That's the most important feature to me and the reason I bought it.
 
J

Joerg

Jan 1, 1970
0
Vladimir said:
The built-in audio systems are unpredictable; especially in the laptops.
Use an external USB sound thing; get a reasonably good one. The other
reason for using an external sound is that someone will eventually apply
full scale AC into it. "Psst-bam!" as the zurgs say. It is better to
"psst-bam" just an external card then entire laptop.

Not much risk here, it's only me who will be using it. Mostly probes
will be connected which pick up fields and have no direct connection to
anything.
 
J

Joerg

Jan 1, 1970
0
google brough up this: http://www.iw3aut.altervista.org/files/PMSDR-Manual-v1.0.pdf

look at page 38, it says it only has mic input so maybe you need lower
your input level

I had very low input levels, the NC-10 simply won't see anything above
6kHz, has a steep roll-off there that almost has to be digital. So maybe
there's an "unlatch trick". I can live with the 48kHz sample clock limit
but not with the 6kHz roll-off.

On the desktop and the other laptop I also used the MIC inputs and both
run to well above 20kHz. The other laptop (Durabook) doesn't have line
input either (laptops rarely do).
 
J

Joerg

Jan 1, 1970
0
Joerg said:
Gents,

Wanted to do some electrical measurements (FFT) using the sound card of
my li'l travel companion Samsung NC-10. This time higher up but then I
found out that the sensitivity rolls off around 6kHz (-6dB). Couldn't
find any hints on what goes on and whether or how that can be fixed. Any
ideas?

The sound card of a larger laptop goes to 23kHz and the desktop to
around 21kHz.

Gents, it's fixed, after a hint from Heiko Nocon in the German NG almost
pointed my nose right into it: Realtek settings -> Microphone -> Noise
Suppression and Echo Cancellation to off -> full bandwidth.

This should really have been und Audio I/O. Plus I never saw it because
they decided to write light blue onto a blue background (oh man ...).
 
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