To BenF and others
The Nano is the perfect candidate for automotive troubleshooting and other low frequency signal analysis. One reason that I am looking for more signal resolution is for automotive secondary ignition analysis which would use about 500us/Div for single cylinder analysis. Many clues can be gleaned from close ignition signal analysis as shown in the GIF1 attachment. The actual waveform is shown in GIF2 attachment. I am sure that there are countless other applications where advanced users could use more resolution at the display and more samples per second to find random trigger events while at T/Div more than 10us/Div.
Yes, we are using an HV probe (1000x @50Kv with it’s own chassis ground) but the Nano (with 1x probe setting) will display in volts not kilo-volts because volts is the input signal. The user has to understand that the display represents kilo-volts.
In this example, if the grid resolution were changed to 50w x 25h (pixels) then half as much waveform could be displayed, but if the sample rate were also doubled, then the waveform would have twice the resolution. The capture buffer used would be half as many samples at twice the normal sample rate for 500us/Div. The screen could be scrolled left or right to make up for the narrower viewing area. Instead of being able to scroll 13 screens, you can now scroll only 6 screens at half the information per screen (equivalent to 3 screens). This whole process would be called “Oversampling 2x mode”. Other oversampling rate options may also be viable.
In addition to seeing better resolution on the screen, the oversampling would increase the ability to find a desired trigger (random event). In the above example the sampling rate would increase from 50Ksa/s to 100Ksa/s.
GIF1 compliments of motorage.search-autoparts.com/mo … 9&pageID=2
GIF2 compliments of labscopes.com/pg11.htm#b