Measuring in High Frequency: High Sample Rates & Computer Streaming Slow, PS4000.llb

[NatNeuWe]

Hai,

Im still a Beginner to LabView and need some help.

I am using Picoscope 4000 Series for the measurements. I am using one of the examples provided by NI, PS4000.llb (PS4000_stream.vi), and discovered that the computer or LabView is very slow, or not showing any data at all, when i change the Sample Rates to 60 M S/s. I even tried at 30 M S/s, i did see some data being stream but really slow.

The problem is i need to measure at the frequency of 30 MHz. As i understood, i will have to set the Sample Rates double the measured frequency.

I think it has to do with the Samples Rate and Number of Samples. or maybe something else.

I would be really glad for the help. 🙂

Nat

[Philipp_Kost]

Hi NatNeuWe,

can you send me the link to the device driver an t the direct link to the manual(s) you use.

Kind regards,

Philipp K.

AE | NI Germany

[Dennis_Knutson]

As the download page clearly states, the driver is not written by NI and is unsupported. Have you contacted Pico?

[NatNeuWe]

Hi Wendler,

sorry for the late reply.

here is the link to the dll from picotech.

http://www.picotech.com/softdownloader.html?zeitfaktor=5m0k3m34k1pp3r&os=drivers&soft=PS4000sdk&pid=...

Somehow i figured it out, i have no problem since. Instead of using PS4000_Stream.vi, i used PS4000_block. To my understanding, this vi does not stream the data directly, but save it in the Scope before sending it to pc.

I hope its the right way, since i have no problem after using a different example.

Regards,

NatNeuWe

[PicoKarunen]

Hi NatNeuWe,

You want to have a look at the webpage below

http://www.picotech.com/education/oscilloscopes/data-acquisition-modes.html

It explains how the data acquisition modes work with Pico Technology devices.

If you require more information please feel free to post on the Pico Technology forum (http://www.picotech.com/support/)

Kind Regards,

Karunen

Pico Technology Technical Specialist