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When you switch between a voltage range >= +/-5V and a voltage range <= +/- 2V, a relay click sound should be heard.
My VT DSO-2810Rs works fine from +/-5V to +/- 50Volts but shows a very small signal on any scale below +/- 2Volts on either channel A or B. I don't hear the relay clicking any longer ...

I'm looking to test some transistors and could use the x,y mode to plot the characteristic curves. I couldn't find anything in the Multi-Instrument 3.6 manual but I thought that there maybe a way to do it.
Thanks,
Squatch

Thanks so much for your expert help. With your help we found the problem and I repaired my VT DSO-2820R.
It seems that I have caused the problem with a ground loop and damaged the USb soft start IC (MIC2025-1YMM).
I purchased a new chip from Mouser for less than a buck and now I am back using my ...

I am still troubleshooting the unit. I have found something new.
With the cable taped as I said before I am now seeing the data slow to update to the screen after 18 - 20 minutes ( at 100kHz and 20,000 record length) . At a 20,000 record length per sweep it starts really fast the slows to a 1 second ...

Using the example on page 21 of the VTDSO-2820R manual rev1.1.
Re-calibration of channel A through all the voltage ranges was successful.
When calibrating channel B erratic readings started and the scope trace was all over the screen when the screen froze with an error. “Transfer error!”
After doing ...

I ran the test you ask for. I checked the 10X probe setting and they were in the 1X position for both probes.
When I change from 2Volts to 5Volts I don't hear the relay chatter on either channel.
Thanks for your assistance!
I suppose it needs a new relay or 2?
I had one more screen shot but I see 3 ...

I am having some issues with VT DSO-2820R. I have been monitoring signals on channel A from +/-200mv to +-1 volt. I am seeing some discrepancies when I change the voltage setting from +/-2V to +/-5V and the readings are way different. I have a signal generator connected now and the output is 1KHZ ...

Can you record a live session or playback of a portion of the data seen on the screen to a .mov, .avi, .mp4, file for example, to be played back at a presentation?
Thanks,
Squatch