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From: romeshkulasekhara on 25 May 2010 05:05
I am searching for a portable (low cost) data acquisition system with
minimum 4 analog channels and 200 ksamples/sec. simultaneous
sampling.
I will be processing signals of a few hundreds of micro volts to
hundreds of millivolts. I will be streaming the data to a pc for
logging. Any recommendations ?

I have asked this in sci.engr.control but I could get little response.

Thanks in advance.
From: amark on 25 May 2010 07:39
On May 25, 7:05 pm, "romeshkulasekh...(a)gmail.com"
<romeshkulasekh...(a)gmail.com> wrote:
> I am searching for a portable (low cost) data acquisition system with
> minimum 4 analog channels and 200 ksamples/sec. simultaneous
> sampling.
> I will be processing signals of a few hundreds of micro volts to
> hundreds of millivolts. I will be streaming the data to a pc for
> logging. Any recommendations ?
>
> I have asked this in sci.engr.control but I could get little response.
>
> Thanks in advance.

Sorry, all that occurs to me is a soundcard, and they're usually not
capable of such rates. Maybe there is one somewhere for the job...
From: Spehro Pefhany on 25 May 2010 07:41
On Tue, 25 May 2010 02:05:19 -0700 (PDT), the renowned
"romeshkulasekhara(a)gmail.com" <romeshkulasekhara(a)gmail.com> wrote:

>I am searching for a portable (low cost) data acquisition system with
>minimum 4 analog channels and 200 ksamples/sec. simultaneous
>sampling.
>I will be processing signals of a few hundreds of micro volts to
>hundreds of millivolts. I will be streaming the data to a pc for
>logging. Any recommendations ?
>
>I have asked this in sci.engr.control but I could get little response.
>
>Thanks in advance.

Try National Instruments. You'll need more in the way of specs..


Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff(a)interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
From: Martin Riddle on 25 May 2010 19:09


<romeshkulasekhara(a)gmail.com> wrote in message
news:d7efdfa7-592b-49b9-adc6-76cddcfc0af3(a)p5g2000pri.googlegroups.com...
> I am searching for a portable (low cost) data acquisition system with
> minimum 4 analog channels and 200 ksamples/sec. simultaneous
> sampling.
> I will be processing signals of a few hundreds of micro volts to
> hundreds of millivolts. I will be streaming the data to a pc for
> logging. Any recommendations ?
>
> I have asked this in sci.engr.control but I could get little response.
>
> Thanks in advance.

Also try Measurement computing.

Cheers


From: linnix on 25 May 2010 20:27
On May 25, 2:05 am, "romeshkulasekh...(a)gmail.com"
<romeshkulasekh...(a)gmail.com> wrote:
> I am searching for a portable (low cost) data acquisition system with
> minimum 4 analog channels and 200 ksamples/sec. simultaneous
> sampling.
> I will be processing signals of a few hundreds of micro volts to
> hundreds of millivolts. I will be streaming the data to a pc for
> logging. Any recommendations ?
>
> I have asked this in sci.engr.control but I could get little response.
>
> Thanks in advance.

You can use a micro with high sampling rates. For example: ARM M3 can
sample upward of 250K/s. However, you would need to deal with the
high data rate (200K/s * 10 b/s * 4 = 8Mb/s). Furthermore, you need
pre-amps to bring the signals into manageable ranges.
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