Dear @nctnico, this is my third oscilloscope.
VPO is a function of update rate (memory depth) and persistence setting. However GW Instek did implement it in a way so traces don't become invisible like on an analog oscilloscope. Maybe you don't like that but the whole purpose of an oscilloscope is to show signals.
I've been testing this oscilloscope since Friday and this IS a problem. And for this reason, this screen will almost always have to be adjusted depending on the frequency of the signal. This is very confusing.
In all four videos 1.36 firmware, Persistence is off !!!, Vector mode, 50% Waveform Brightness!!!
VIDEO1
Display should not depend on memory size. But the GW-INSTEK 2000E depends on it.
This is just a poorly written display algorithm. It needs to be fixed in the next firmware. [132mV pk-pk 50kHz sine AM modulated with 21.76Hz sine.]
VIDEO2
It is possible that only my oscilloscope is bad, but in
Run mode it is badly calculated and the brightness is maximized everywhere. Look at VIDEO2 where I switch between
Run and
Stop mode. Only in
Stop mode is the display good! [132mV pk-pk 76kHz sine AM modulated with 18.5Hz sine.]
VIDEO3
After changing Holdoff or timebase, the display is good for a moment and then it's bad again. [132mV pk-pk 76kHz sine AM modulated with 18.5Hz sine.]
VIDEO4
This time I only change timebase.
[132mV pk-pk 50kHz sine AM modulated with 21.76Hz sine.]
Anyway, the oscilloscope is very responsive, I like it. I hope they will fix visual problems.