Hi all,
Question regarding hardware for lock-in amplifier.
I need to build lock-in amplifier using one of NI DAQ-cards and LabView software.
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-4472/4471.
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 amplifier signals before DAQ-card.
Can I use this USB-4431 for this purpose?
It seems to be slightly less good comparing to recommended internal PCI cards like NI 4472(4471), but maybe it is enough good for my application?
If not, which USB DAQ board can you recommend for this purpose?
Thank you in advance,
RG
