0.1V sensitivity having issues.

0.1V sensitivity having issues.

Postby headsmess » Thu Oct 17, 2019 7:25 am

im having issues with my lil 138.

10mV is fine.
1V is fine.


but 0.1V is crazy.

doesnt matter if its DC,AC or GND.

neither if its 1x,2x, or 5...

i have a signal displayed on the 0.1V.

varying too fast to get decent readings... i see 5Vp-p in the midst of all the flashing digits on the 2x setting. about 2V on 5x. and iunno. 0.5V on 1x. basically jsut random noise.

calibrates fine, the square wave adjusts fine. triple checked my soldering. so, unless ive got a faulty cap somewhere... im lost.

wish i hadnt killed my dso112 now. so much user friendly than this thing. even the firmware flash on that only took a few minutes. this one... i saw three pages of instructions and the need for doodads to actually do it. cant i just do it over USB?
headsmess
 
Posts: 7
Joined: Tue Nov 17, 2015 8:23 am

Re: 0.1V sensitivity having issues.

Postby headsmess » Thu Oct 24, 2019 9:51 pm

nothing? as i say, ive got a random signal on the 0.1v setting. everything else vaguely works, but that noise is driving me mad. renders the thing virtually useless.
headsmess
 
Posts: 7
Joined: Tue Nov 17, 2015 8:23 am


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