Search found 3 matches

by gf1
Thu May 17, 2018 6:14 pm
Forum: DSO 112 & 112A (Coral)
Topic: DSO112A displays -100mV DC with shorted input
Replies: 3
Views: 6451

Re: DSO112A displays -100mV DC with shorted input

Zooming in vertically to 20mV/div (and moving up the trace) reveals also a small periodic AC waveform added to the -100mV DC offset, which does not look like noise: 20180517_002128~01.jpg Consequently I tried to measure this signal at the AOUT test point (ADC input) with a faster 1GSps scope, and go...
by gf1
Sun May 13, 2018 3:33 pm
Forum: DSO 112 & 112A (Coral)
Topic: DSO112A displays -100mV DC with shorted input
Replies: 3
Views: 6451

DSO112A displays -100mV DC with shorted input

Yesterday my DSO112A arrived and I'm quite surprised by the capabilities of this little gadget :) I noticed a strange behaviour, though, which I cannot explain. DSO is running on battery power (in order to rule out any influence from USB power supply) and rests on a table, test cable is not yet conn...