Can't set high sample rate

[ignisuti]

I'm using the Measurement Computing USB-1608G which says it can handle 250KS/s per channel. However in DasyLab, I'm having trouble collecting analog samples at a rate that high. 

I'm trying to collect data at that rate on 10 channels. Through the settings, I've found out how to set it to 200KS/s, but once I hit the PLAY button, I'm told that rate is too high for that many channels. I'm told I have to bump it down close to 20K/s which is far too slow because I'm trying to capture events occuring within 10's-100's of microseconds. 

Is this a limitation of DasyLab? Is there a different setting I need to configure?

[hw70]

No, not per channel, 250kS/s is the USB-1608G's combined/sum/aggregate rate for all channels.

One channel >>> max 250kS/s

Two channels >>> max 125kS/s per channel

etc

http://www.mccdaq.com/PDFs/manuals/USB-1608G-Series.pdf (page 11)

[CJ_Butler__DASYLab_Pro]

Measurement Computing wrote the driver, and it is aware of the features and limitations of the supported products.

The USB-1608G uses successive approximation, and has one A/D converter for the channels. As Herr Wons has said, the maximum sample rate is aggregate, and you need to divide by the number of channels.

You should be using the USB-1616HS (1 million s/sec) or perhaps the USB-1608FS-Plus.

USB-1608FS-plus

• Simultaneous sampling (1 A/D converter per input)
• Up to 400 kS/s sample rate (100 kS/s max for any channel), up to 800 kS/s burst mode

See this product comparison

http://www.mccdaq.com/products/USB-1608-Comparison.aspx