How to change the gain of an analog output

I want to have a resolution of at least 500 v microphone. I thought that you could do this in two ways: one, to determine the maximum and minimum values, and two, to change the gain of the channel. I use a PCI MIO 16th 4, also known as the name of PCI 6040E and a CBS 68.

The NO 6040E manual family I read than analog output bit resolution is 12 bits. Usually a range of 0 - 10V or - 5V - + 5V, which gives about 2.44mV resolution. I thought that by changing the minimum and maximum output values I could therefore change the range and therefore to change the resolution. I want at least a 500microV (0.0005V) resolution. By changing the range 0 - 1V, I should get around 244.14 microV resolution.

The thing is that when I run my simple program, it displays the voltage I want, but it only increments around every 5 iterations of said 500microV, which is around the default resolution of 2.44mV, which indicates that the resolution has not changed (I use an osciloscope to measure physical strength).

My other option to change the gain should how to proceed, if possible. But I don't know where and how change that, and he does not appear in the DAQmx channel properties. Any ideas on how to do this, or perhaps another solution to my problem?

P.S. That's a linear ramp drive a piezo and take pictures while doing so, just in case you were wondering why I wanted to solve this problem.

Thank you for any help in advance!

You have not read the card correctly. The analog output is a range of 0-10 or + /-10.

Tags: NI Hardware

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