Search found 6 matches

by Atlantico
Thu Mar 08, 2018 5:33 pm
Forum: BioSemi Hardware
Topic: Active Electrodes life Span
Replies: 0
Views: 13119

Active Electrodes life Span

Dear all We have a number of Pin-Type Active-electrodes and Flat-Type Active-electrodes along with the AD box etc. The system is working now, we use it routinely. I was just wondering what if there is a limited number of uses for these electrodes before accuracy etc being compromised, even if they a...
by Atlantico
Sat May 17, 2014 4:09 am
Forum: BioSemi Hardware
Topic: understanding active electrodes and impedance
Replies: 4
Views: 58907

Re: understanding active electrodes and impedance

My take on this Active electrodes: Amplifier close to the signal origin skin-side, so the connecting cable to the unit will transport a signal already amplified, which will be less degraded by the existing magnetic\electric coupling to the cable. Moreover since the output resistance of the active el...
by Atlantico
Fri May 16, 2014 8:04 pm
Forum: BioSemi Hardware
Topic: Channel Noise with Bucket Test
Replies: 1
Views: 6123

Channel Noise with Bucket Test

We have the active two system with ExG1-8 and A1-16 channels. We have done the one bucket test to all channels (salted distilled water inside, motionless electrodes) and we are getting these spikes and oscillations as shown in the figure bellow. What could be the cause to this? Time axis in seconds,...
by Atlantico
Tue Apr 29, 2014 9:05 pm
Forum: BioSemi Hardware
Topic: Using the pin type EEG electrodes for EMG signal acquisition
Replies: 0
Views: 9891

Using the pin type EEG electrodes for EMG signal acquisition

Our research work requires the acquisition of the Electromyogram (EMG) in a body area with body air, which we would prefer not to require shaving. So no shaving. Also means that we can not use the flat electrodes. Can we use the pin-type EEG electrodes (whose fasteners we will be removed from the ca...
by Atlantico
Tue Apr 29, 2014 11:02 am
Forum: BioSemi Hardware
Topic: Simultaneous EEC and ECG: which CMS & DRL to use
Replies: 7
Views: 17465

Re: Simultaneous EEC and ECG: which CMS & DRL to use

Thank You, will do that.
by Atlantico
Mon Apr 28, 2014 11:03 pm
Forum: BioSemi Hardware
Topic: Simultaneous EEC and ECG: which CMS & DRL to use
Replies: 7
Views: 17465

Simultaneous EEC and ECG: which CMS & DRL to use

In our experiment we will be acquiring the ECG using EX1 to EX8 FLAT electrodes, for which I have been using the front-end CMS and DRL connection. Simultaneously we will be acquiring the EEG using the PIN type electrodes A1 to A32 flat cables electrodes which have their own CMS and DRL. Which CMS & ...