Maybe consider pressing the Min/Max Hold once they have been enabled, resets or erases the waveforms rather than adding more of them. How many min max waveforms for channel 1 does one need?
We'll remove the button if both a minhold and maxhold for the channel are present. The user can modify the math expressions in the added channels, so we'd re-enable the button if one (or both) expressions are altered.
3.4.4 FFT does not mention the THD feature. The software shows invalid. Is it implemented and not documented, or just a place holder?
The THD will display as invalid if there isn't enough resolution to get an accurate measurement. You should have five full periods (ideally 10) to get a meaningful result. We'll clarify this in the manual.
One person had asked about tracking the rise time. Can you add histograms, averages, RMS.... to the measurements? Currently you can only display 8 measurements. You may need to make use of the upper right area of the display.
It's easy enough to allow multiple rows of measurements at the bottom. Our first thought is to have a window open when you click a measurement, which allows editing of the measurement, as well as displaying the histogram, trend, average, RMS, percentiles, etc.
We can add an option to pin some or all of this information to the upper right as well.
(By default, the upper right area is unused so that the software can be docked to one half of the screen without issue.)
Can histograms be added for math waveforms?
Yes - we can likely get this in by tomorrow's release.
What is the limiting factor in the 200 mVPP trigger limit? I assume you require a minimum of that value. Consider that a resistive probe may be 20:1. Even old TTL would not meet that level. Maybe I am not understanding the spec.
The trigger will work below 200 mVpp, but at a reduced bandwidth. At low amplitudes, you might need to bump the trigger level up or down by a few mV to get a stable trigger. The limit stated in the manual is a conservative guideline.