Lock in Amplifier with high sampling rates on non DSA hardware

[Avs]

Hi,

I plan to use the NI lock-in amplifier startup kit to detect a harmonic signal of around 400kHz. I plan to use the digitizer PCI-5105 ( I have not purchased it till now, but I will soon). I have downloaded the lock-in start up kit and unzipped the folders and was hoping to give it a trial run with a NI USB-6363 however the vi does not open because it says there are a lot of subvi's missing (subvi's like AI read.vi, AI clear.vi, etc.). Also the LockinDemo.vi seems to use NI 4472 as a default hardware. My questions are 1) Can the NI lock-in-amplifier startup kit be used with PCI-5105 and 2) can the missing vi's be downloaded from somewhere or be replaced with other blocks on my own?

Thanks in advance for any help

Avishek

[johnsold]

Avishek,

The missing subVI names sound like they may be from the legacy DAQ drivers.  The newer driver is called DAQmx and the VIs have names like DAQmx Read.vi.

The legacy DAQ drivers are still available, I think, but they may not be compatible with your OS or devices.

Lynn

[Ryan-C]

Hi Avishek,

The above poster is right -- you want to use the DAQmx drivers.  The newest available version is 9.5, here: http://joule.ni.com/nidu/cds/view/p/id/2888/lang/en

Best,

[Avs]

Thanks a lot Ryan and Lynn. I will look into it.

The other question that was on my mind is whether I can use a non-NI data acquisition card to run with Labview Real Time operating system. ( I am planning to use a Gage-applied digitizer) to capture data which I want to process on a Labview RTOS. Is this possible? If so, what do I need to do.

Avishek.

[Aldo_A · Accepted solution]

Hi Avishek,

To begin development with LabVIEW Real-Time, first you can check if you current system will support LVRT. You can make use of the RT Disk Utility which will test your system as mentioned in this KB article: http://digital.ni.com/public.nsf/allkb/9209361E17708D548625744A007FF353

We have lists of hardware belonging to proven systems here: https://decibel.ni.com/content/docs/DOC-10692 and you can always check for other hardware compatibility here: http://zone.ni.com/devzone/cda/tut/p/id/8239

We don't have a driver available for the Gage PCI cards but if these cards use VISA calls, you can develop and have LVRT recognize your card by following the KBs:

1) Recognize Third Party Device with LVRT: http://zone.ni.com/devzone/cda/tut/p/id/3142

2) Developing LVRT Driver for PCI Device: http://zone.ni.com/devzone/cda/tut/p/id/3251

I hope this info helps!

[tronoh]

Dear All

I have plotted waveform graph frequency vs amplitude of real time signal. I am using measurement computing USB1208FS. I used fft.vi to plot the graph and get the waveform which is attached. On X-axis frequency is form 0 to 0.49HZ. But I want to increase that from 50 to 500 hz. When X-axis scale is in auto select mode then it automatically adjust to 0 to 0.499 hz. When I deselect autoselect mode and edit x-axis from 50hz to 500hz then no waveform comes on display. I have set the sapling rate of 1024 and count of 500. Please guide me how can i get the desired waveform graph.

The waveform which i plot is shown in attch1 and my desired waveform is shown in attach2.

waiting for response

Kind Regards

Urfee

[altenbach]

You are posting in a thread marked as solved with a question that has nothing to do with lock amplifiers.

Please start a new thread!!!