Search found 4 matches

by alevitsk
Tue Feb 01, 2022 10:54 pm
Forum: BioSemi Hardware
Topic: ABR Noise
Replies: 5
Views: 5623

Re: ABR Noise

Hi Coen, Yes, EX1 and EX2 are active electrodes. Thank you for the advice, I will shield the cables moving forward. I'm not sure if I should start a separate thread for this, but when using these same ABR inline cables, I got a different kind of interference (attached: this time the cables are plugg...
by alevitsk
Mon Jan 31, 2022 6:06 pm
Forum: BioSemi Hardware
Topic: ABR Noise
Replies: 5
Views: 5623

Re: ABR Noise

Hi Coen, Thank you! Yes, we are using a long, unshielded wire (~5ft). What struck me as odd is that we have not experienced such high interference during previous ABRs sessions. In addition, is it strange that the other nearby external electrodes (EXG 1 & 2), with unshielded cables of similar length...
by alevitsk
Thu Jan 27, 2022 9:57 pm
Forum: BioSemi Hardware
Topic: DC Offset Jitter
Replies: 0
Views: 7834

DC Offset Jitter

Hello, When viewing the electrode offsets in the ActiView window, I have been seeing some "jitter" in the voltages. They are small, momentary increases or decreases to the offset levels, that then return to normal. When I was first introduced to ActiView, I was told that these jitters were undesirab...
by alevitsk
Thu Jan 27, 2022 8:28 pm
Forum: BioSemi Hardware
Topic: ABR Noise
Replies: 5
Views: 5623

ABR Noise

Hello, I have been running ABR experiments in my lab, and today I noticed that the external electrodes that we use for the ABR tiptrodes are giving us a large, unexpected waveform. Neither the other externals, nor any of the bundle electrodes seemed to be giving us any trouble. I do not know if this...