Tektronix TDS210 auto setup problem

[PabloT]

Good morning,

I'm using Tektronix TDS210 and Labview to adquire waveform information. It is connected to the computer via RS-232.

I'm using the labview drivers for this oscilloscope. Everything works fine except when the oscilloscope has to auto setup when there is a signal of 100Hz or less of a low amplitude.

It tries to auto setup, but it isn't capable to find the signal. The timebase didn't auto setup correctly...

What can be the problem? I was thinking of changing the default settings of the oscilloscope. How can i do this?

[NathanT]

Hello Pablo,

      I recommend that you explicitly configure the scope with the Configuration VIs in the instrument driver.  That way you can be certain that it is configured how you expect it to be.  It also might be good to consult the instrument manual to get a better idea of the limitations of the auto setup.

Cheers,

NathanT

[PabloT]

Thank you for the answer.

I've already configured the scope withe the Configuration VI and the problem is still there. I realized its not a matter of the communication with labview. 

Measuring directly a signal of 10Hz and 1Vpp using the AUTOSET button didn't work. The timebase didn't adjust correctly.

However, i tried the same but using LabView. I made a small program that firstly runs the autosetup and then it forces the timebase to TIME/DIV=25ms/div. Doing this it worked.

Later i tried reducing the amplitude to 200mVpp and the scope didn't manage to adjust correctly. So i guess that the autoset doesn't work fine with low frequencies and low amplitudes. I could configure the program to adjust the vertical line too, but its not useful for the experiment that I'm trying to carry out since i do not know the amplitude of the signal.

I consulted the manual but there is nothing useful about the autoset...