RichardK,
Thank! I will give it a go later today.
RichardK, thanks for this. Unfortunately I could not compare with the latest Hantek 1.0.4 as their website is down.
Just some feedback that may help on your project:
My issue with no noise on channel two on the Hantek software and the usual noise on both channels on your software is still there. If I run the Calibration utility on yours it reminds me to ground the probes and then fails, and then the noise on my channel 2 goes away! Channel 1 stays the same. Now my result looks the same as on the Hantek software.
Running the calibration on the Hantec does not come back with either a failure or a complete and nothing changes. I assume the calibration feature is not working there.
Thanks again.
Matchless,
As I posted earlier, I have that problem occasionally at a lesser degree. One channel being noticeably less noise than the other - and mine swaps. I believe it to be a software artifact instead of real. It is practically impossible for any signal to be totally noise free. If you are seeing NO noise on Ch2 at all, I think you have a problem not related to RichardK's software.
If noise shows with RichardK's software, and the stock doesn't, it make me think may be the display setting. The
stock software restore last setting on start up - so
if the last setting is wrong, it stays wrong. RichardK's software doesn't restore last setting, so you are forced to change and that just may get it to the right setting.
Check and see if you make the same mistake I made often when I was new with the scope: Volt/div and probe 1x/10x setting. The mistake was setting the V/div too low and/or not matching that of 1x/10x problem.
Example of setting mistake:
using the scope's reference wave - Square +2V @ 1KHz.
1ms/div, Ch1 at
1V and Ch2 at
500mV.
Ch1 at 1V will show with noise
Ch2 (top part) will show little or no noise
Photo 1 - shows no noise on Ch2 when square wave is highThat is
because at 500mV, it cuts off before when the trace when it reaches +-4 divisions = +-2V. With the reference wave square high part being 2V,
anything above 2V is clipped and the scope trace flat-lined.
Due to parts' tolerance, 2V is not exactly 2V. You see 2.02V in the photo. In any case, with anything over 2V clipped, positive noise is clipped. So it would appear as if it is much less noise.
One can imagine, for a square wave @ +-2V (instead of just +2V), both high volt and low volt noises are gone so it looks as if Ch2 has no noise at all.
Photo 2 - Proper setting for bothIf I set Ch2 at 1V/division (as with Ch1), now it wont clip and Ch2 noise is shown in full. In fact, Ch2 has more noise than Ch1 when settings allow it to show instead of clipping it off.
These two photo was taken back-to-back, so practically at the same time. With the stock software, it restores the last setting on open, so until I notice it and change it, it would always looks as if Ch2 has less noise than Ch1 in this scenario - but in fact Ch2 is more noise than Ch1 when proper setting is chosen.
Hope this helps...
Rick