Simultaneous Sampling between multiple WIFI cards (i.e.. NI 9239 Measurement system)

[brtvandenbroeck]

I'd like to build a multichannel acquisition system. A hard requirement is that all channel should be sampled simultaneous (used for beamforming). To avoid a lot of cabling the WIFI modules (i.e.. NI 9239 Measurement system) seem ideal. To spread the sensors out in a room I'd like to use multiple of these modules, but I need them to sample on the same clock (a clock delay isn't such a problem, but different clock jitter is --> glitches). For as far as I checked the datasheet of the NI 9239 (and similar), I think this can't be done...

Other needed specs are:

- # analog in: min 4

- FSmin = 16000Hz

- inputtype = voltage (for microphones)

- inputrange: preferably -1 --> 1V

So I wonder if there are any other similar products (using WIFI and sample simultaneous.) for which this is a possibility? Or am I mistaken and is it possible with the  NI 9239 (and similar)?

Thanks in advance!

Greetz,

Bert

[brtvandenbroeck]

I'd like to build a multichannel acquisition system. A hard requirement is that all channel should be sampled simultaneous (used for beamforming). To avoid a lot of cabling the WIFI modules (i.e.. NI 9239 Measurement system) seem ideal. To spread the sensors out in a room I'd like to use multiple of these modules, but I need them to sample on the same clock (a clock delay isn't such a problem, but different clock jitter is --> glitches). For as far as I checked the datasheet of the NI 9239 (and similar), I think this can't be done...

[brtvandenbroeck]

Other needed specs are:

- # analog in: min 4

- FSmin = 16000Hz

- inputtype = voltage (for microphones)

- inputrange: preferably -1 --> 1V

[brtvandenbroeck]

Other needed specs are:

[brtvandenbroeck]

- # analog in: min 4

[brtvandenbroeck]

- FSmin = 16000Hz

[brtvandenbroeck]

- inputtype = voltage (for microphones)

[brtvandenbroeck]

- inputrange: preferably -1 --> 1V

[brtvandenbroeck]

So I wonder if there are any other similar products (using WIFI and sample simultaneous.) for which this is a possibility? Or am I mistaken and is it possible with the  NI 9239 (and similar)?

[brtvandenbroeck]

Thanks in advance!

[brtvandenbroeck]

Greetz,

[brtvandenbroeck]

Bert

[Nico_support]

Hello Bert,

At this moment the NI 9191 doesn't have external PFI lines for triggering and sharing the hardware clock.

Could you please contact our office NI Belgium: 02/7570020 so we can further discuss your project?

Thanks!

Nico