question about LabVIEW lock-in amplifier design

[constantinex]

Hi all,

I'm using myDAQ with NI DAQPad-6259 Pinout to measurement the input signal. and i want to build a lock-in amplifier by labview to measurement the input signal. Does anyone have this kind of tutorials or vedios which can sample help me to build this? I didn't want to use the toolkit but try to understand how to build and why it should be.

Thanks. 

[natasftw]

Are you using a recent version of Windows?  I want to make sure you can use the DAQpad without running into issues.  It doesn't really have driver support with 64-bit operating systems.

[constantinex]

no,not the new version.

[natasftw · Accepted solution]

Then look here:

http://www.ni.com/white-paper/5613/en/

http://forums.ni.com/t5/Dynamic-Signal-Acquisition/lock-in-amplifier/td-p/1057126

http://forums.ni.com/t5/LabVIEW/lock-in-amplifier-using-NI-USB-6251/td-p/1550972

http://forums.ni.com/t5/Dynamic-Signal-Acquisition/Lock-in-Amplifier-and-DAQmx/td-p/282419

[eddycur88]

Hi,

Continuing this issue regarding lock-in amplifiers.

I have another question regarding hardware.

Due to the need to move it from one place to another we prefer solution based on notebook and thus USB DAQ-card.

I found this oneUSB-4431, having 4 channels (seems to be working in pseudo-differential input mode, if I am not mistaken), 24-bit resolution, up to 102.4 kS/s sampling rate, delta-sigma ADC and simultaneous sampling mode and +-10V input range - so looking similar to PCI-4474/4472. But it has smaller dynamic range (100dB instead of 110dB), smaller timebase accuracy, and sample-rate resolution and it seems that it doesn't hav antialiasing configurable filters, etc.

I need it for light-measuring applications with signal levels >10uV and I intend to use low-noise configurable AC/DC pre-amplifier (from Femto company) having gain and bandwidth control in order to apmlifier signals before DAQ-card.

Can I use this USB-4431 fro this purpose?

If not, which USB DAQ board can you recommend for this purpose?

Thank you in advance,

RG

[natasftw]

You didn't really continue the discussion.  You bumped an old thread to ask a new question. You'll have better luck asking in the multifunctionDAQ forums.  You're asking this question in a forum designed to discuss the myDAQ and myRIO.  These are quite a bit different than what you're wanting.

[eddycur88]

Ok, thanks.

I will try there.

All the best

RG