BioSemi.nl

You should only connect one CMS/DRL to the AD-box (otherwise, the blue light keeps flashing). Connect either the A set with CMS/DRL, or the front-panel CMS/DRL. So, you can use the EX electrodes with the front-panel CMS/DRL provided the A connector remains unplugged.

Best regards, Coen (BioSemi)

Use the CFG file for 64 channels with 1020 labeling, best regards, Coen (BioSemi)

Contact info@biosemi.com

You will have to ship your AD-box and USB-receiver to BioSemi.

Note that the upgrade is only possible for AD-box serial ADC16 or higher.

Best regards, Coen (BioSemi)

Since the skin is not abraded, disinfection is generally not needed. When disinfection is preferred (as was the case during the Covid-19 outbreak), then follow the instructions as shown in https://www.youtube.com/watch?v=-CZx3_tbrYM . Do not use hydrogen peroxide since it may damage the headcap ...

https://scholar.google.com/scholar?hl=e ... oq=biosemi

Best regards, Coen (BioSemi)

Contact your local BioSemi representative

ADC6 is an Mk1 AD-Box and does not work with the red receiver. Your white receiver does work with the USB Trigger Interface (the trigger ports of white and red receivers are identical).

Best regards, Coen (BioSemi)

ActiView for ActiveThree can stream the data from the ringbuffer via a TCP/IP connection. You can consider to develop a MatLab client to read this real-time data stream.

Email to info@biosemi.com for the latest ActiView version and a TCP/IP client example.

Best regards, Coen (BioSemi)

It is normal operation that only trigger lines 15 (start/stop) and 16 (1 sec pulses) are transmitted from Master to Slave. The stimulation triggers should indeed be connected to the Master. The trigger lines 1-14 of the Slave are ignored when the Master and Slave files are merged into a single ...

ActiveTwo (Mk2 and Mk2.5) only works with ActiView 9.xx

ActiveThree only works with ActiView 10.x

Please contact your local BioSemi represenative for ActiView 9.03 that allows hypersampling:

Master: ActiveThree with ActiView 10.0 on 16 kHz sample rate
Slave: ActiveTwo with ActiView 9.03 on 2 kHz ...

The above CFG is for ActiveTwo.

Please download the ActiveThree CFGs from https://www.biosemi.com/download/CFG_fi ... view10.zip

Best regards, Coen (BioSemi)

Which "analog box" exactly are you talking about ?

It must be something else than a BioSemi AIB (https://www.biosemi.com/aib.htm) because the BioSemi box only has a digital optical output (and it is unlikely that you can measure anything meaningful from this optical data stream).

ActiveTwo Mk1 and Mk2 (as well as the new ActiveThree) systems use exactly the same BDF file format (https://www.biosemi.com/faq/file_format.htm). In particular, storing of the 16 trigger lines in the Status channel is the same for all systems. The only difference between Mk1 and Mk2 files is the ...

Use the current 9.02 version, it works with every ActiveTwo system (even as old as from 2002). You might have to upgrade the firmware of your USB-receiver to use it with Windows 10/11, see https://www.biosemi.com/faq/install_USB.htm.

Best regards, Coen (BioSemi)

The BioSemi system has DC amplifiers, there is no high-pass filter. Check the signal in ActiView with the (display) filters switched off. You have either a high-pass in your file reader, or you have capacitively coupled the trigger line to the Analog Input Box.

Best regards, Coen (BioSemi)

With the triggered hyperscanning method, the data files from the two (or more) systems are merged into a single hyperscanning file offline. So it is not possible to stream hyperscanning data during the recording.

Best regards, Coen (BioSemi)

According to the LSL website it should work with ActiveTwo (2 and 2.5), but that's all I know.

Best regards, Coen (BioSemi)

You can Hyperscan with the Active3 and Active2.5 system using the method described on https://www.biosemi.com/faq/Hyperscanni ... erface.htm .

It is not possible to use LSL for ActiveThree Hyperscanning.

Best regards, Coen (BioSemi)

Send the red receiver to BioSemi, we will replace it with a white one (we still have a few).

Best regards, Coen (BioSemi)

ADC11 are Mk1 systems (20 years old), they do not work with the new red receiver. You should use the older type white receiver.

Best regards, Coen (BioSemi)

What is the serial number of your AD-box ?

Best regards, Coen (BioSemi)

The CFG file stores all ActiView control settings, the channel labels, and a few system settings (e.g. how response switch signals are linked to triggers). ActiView opens with the default.cfg file.

On the About/Configure tabpage, you can read a CFG file (for example a CFG with 32-chan settings and ...

Google on "opamp buffer output impedance". With active electrodes, the electrode impedances in the interference paper (Ze in Fig. 1) are reduced from tens of kOhm to less than an Ohm, and the magnitude of interference is reduced with the same ratio.

Best regards, Coen (BioSemi)

1. What is the definition of offset?

The electrode-gel-skin interface forms a galvanic half-cell. The half-cell potential is determined by the electrode metal. The offset voltage is the potential difference between two of these half-cells. When the electrodes are identical (same metal and perfectly ...

The above is not a standard option in ActiView that can be enabled with a CFG setting. Bipolar display for all channels would require changing the (open source LabVIEW) source code.

Best regards, Coen (BioSemi)

Reference the data. After referencing, the locations of CMS and DRL are not relevant anymore.

Best regards, Coen (BioSemi)

That depends on whether the evoked responses also alternate in polarity. With ABR for example, that's not the case (so the noise trace still shows the noise).

Best regards, Coen (BioSemi)