Read a data point every time via the sound card

Hello!

I'm reading the output of an amplifier to lock that cannot be connected to my PC. So I decided to read througn my mic.

To do this, I connect channel 1 or 2 for my microphone.

However whenever I do a reading I can not simply take a while but only several points at once.

10 is the minimum number of points I can get when I put the sampling of 100 and length frequency 0.1 in the VI of its acquisition.

Any combination that translates into less than 10 points gives me an error (for example 100 sampling rate and duration 0.01).

I thought that by indexing dynamic data to acquire its VI would solve the problem, but playback is differnet from that I get when reading lock-in amplifier

through GPIB.

(I'm testing with a locking amplifier which I can via GPIB interface.  So at the same time, I read with my sound card and the GPIB and compare graphs)

Any way to read a point every time?  Or I'm getting something other wrong here?

Thanks for your time!

Looks like the CDA min frequency response of 10 Hz, pg 69 card technical:

http://www.hardwaresecrets.com/datasheets/ALC888_1-0.PDF

However, you can apply a known value of low voltage DC at the entrance to see if it reads properly micro. Note that microphones out low level signals, looks like the ADC full scale entry is ~1-1.5V so make sure that your entry does not exceed. You can use dividers of resistive voltage if necessary to reduce the input voltage.

-AK2DM

Tags: NI Software

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