USB-4431 integration problems

[ddallen]

Good afternoon,

I have a few questions about this software and how it works with the NI USB-4431:

1: the filter roll off gives figures of 20dB to 400dB, is this per decade or per octave

2: What does the TC do?

3: Is there an option to put in a settling time for the filters?

4: How do I set up the software to take a finite number of measurements i.e. 100, I have tried this by putting in a For loop instead of the While loop. This does do 100 measurements but the value of TC does not appear to have any affect. It takes the same amount of time to take 100 measurements at 100ms as it does at 1s.

5: How do I get the i/p to accept Vrms measurments?

[Wilson54910]

Hi ddallen,

Which software are you using?

Thanks,

[ddallen]

Hi Nathan,

I am using the MultiChanel LockIn-DAQmx software

Dave

[Wilson54910]

Hi Dave,

Thanks for the clarification. 

I assume you are using the example given to you on this forum 

I am looking into what this could be but I have not used this example before.

[Wilson54910]

Hi Dave, 

This was the link - http://forums.ni.com/t5/Multifunction-DAQ/I-need-help-setting-up-USB-4431-as-a-lockin-amplifier/m-p/...