Hi there.
I am using the USB-6251 for frequency measurement. I use C# and the latest 8.5 drivers for .Net 3.5.
My question is this:
I have CounterInputChannel with MeasurementType=SemiPeriod.
The TimeBaseSource is "80MHzTImebase" and Prescaler is 1.
The reported minimum (CICHannel.Minimum property) is 25ns - 40MHz
I am measuring frequency on a 32.768kHz crystal which should be pretty stable and accurate. The measurements suggest that the samplerate is actually 20MHz, not 40MHz. This also makes sense, because if I try to create a frequency measurement, I am forced to use a divisor of 4 or more - which gives a sampling rate of 20MHz.
So my question is this: Is the reported minimum as read from CIChannel.Miminum wrong?
