Search found 3 matches

by digbabo
Thu Dec 08, 2011 11:02 am
Forum: USB PC Oscilloscopes
Topic: noise when use x100 probe with picoscope 4227
Replies: 5
Views: 3983

Re: noise when use x100 probe with picoscope 4227

You are right Dat, most of the noise is gone when the whole system is shielded. The problem is all for screening, not the probe as the similar amount of noise can be seen by the x10 and x100 probes.
by digbabo
Wed Nov 30, 2011 6:05 pm
Forum: USB PC Oscilloscopes
Topic: noise when use x100 probe with picoscope 4227
Replies: 5
Views: 3983

Re: noise when use x100 probe with picoscope 4227

Thanks for your replies, I was ground my probe by both HV earth and measurement earth, use both desktop and laptop (with battery), it doesn't help. I don't want to use the lowpass filter as it will distort the waveform. rather old Gould probe being designed for a scope with much higher input capacit...
by digbabo
Mon Nov 28, 2011 2:52 pm
Forum: USB PC Oscilloscopes
Topic: noise when use x100 probe with picoscope 4227
Replies: 5
Views: 3983

noise when use x100 probe with picoscope 4227

Hi, I am using picoscope 4227 to measure lightning impulse voltage up to +/-1MV. The input to the scope will be up to 1200V, I have to use x100 probe to reduce the input to range of +/-20V. When I use one of my x100 old probe (pb17 from GOULD maybe) with picoscope, it picked up alot of noise in the ...