How can I send triggers using inline code in E-Prime to ActiveTwo using the Biosemi USB Virtual Serial Port cable?
If your E-Prime experiment contains legacy inline code for sending triggers via the parallel port, you can switch to sending triggers via the new USB virtual serial port cable by following these instructions:Read More
Can I record high-density sEMG with the ActiveTwo system?
High density surface EMG as described in the recent publications on the Biosemi site is possible with the addition of the sEMG accessories. The original model of the high density sEMG probe was made for ActiveOne, so the connector differed. The current version separates the electrode grid from the preamp as in: reusable grid sEMG preamplifier…Read More
How long do active electrodes last, and what is the process for repair if they get broken?
We expect the new red-rubber reinforced ActiveTwo active electrodes to last more than 1000 uses, based on our experience so far, and based on automated repeated-strain testing. The way ActiveTwo electrode sets are built, they are not repairable by the end-user, but we can replace single electrodes for you. We can so this quickly (24…Read More
Can I install ActiView on a Windows 10 computer?
You CAN install current versions of ActiView on Windows 10. But, before you do so, if the system was orignally delivered before January of 2017 you should update the firmware on the optical receiver / USB interface so that you do not have to go through the very long and arduous process of installing an…Read More
Where can I find the coordinates of the 128 channel caps based on the 5% system defined by Oostenveld and Praamstra?
The positions in these caps come from the Oostenveld and Praamstra 5% system. See http://robertoostenveld.nl/electrode/ for background and for links to electrode coordinates in a variety of formats. Depending on what software you are using for analysis, we might be able to provide another file format. The Biosemi channel assignments (relating electrode labels to electrode sites in…Read More
How can I change the ActiView CFG file so that it displays and saves the correct channel labels for my system?
In the ActiView software, select About ActiView > Load CFG. Navigate to the folder called Configuring and select the CFG that matches your head caps. For example, if you have Biosemi standard 32 channel head-caps and want the 10-20 labels to be displayed, the file you want is “10-20system32+8.cfg”. Once this CFG is loaded, go…Read More
How can I send triggers from MATLAB via the USB virtual serial port trigger cable provided with my ActiveTwo System?
Since mid-2016, Biosemi has included a black USB virtual serial port trigger cable with each new ActiveTwo system. The device is depicted below. Inside the shell of the 37 pin connector is a microchip that appears to the stimulus computer as a virtual serial port but provides 8 bit parallel TTL output to the ActiveTwo…Read More
What are the computer requirements for ActiveTwo?
ActiveTwo is provided with drivers and host data acquisition software for Windows, Mac, and Linux computers. Note that certain applications, such as event-related potentials, often require a separate computer to run experimental control / stimulus delivery software. The requirement for a separate computer for stimulus delivery is more a function of the experimental control software…Read More
How do I perform the one-bucket test to identify faulty electrodes? Or, why does the blue CM in Range flicker and the signals pulsate once every half second?
The blue CM in Range light reflects two things: 1) whether the CMS and DRL electrodes are adequately connected to the participant’s body, and 2) whether all of the other active electrodes, cables and connectors are intact. If any of these are NOT true, then the blue CM in Range light will flicker and the…Read More
What is the purpose of amplifier/converter modules in the ActiveTwo system?
The ActiveTwo Base System has no channels. The Base System consists of the parts that every ActiveTwo system needs to have, but excludes the parts that are used to custom configure ActiveTwo for various purposes, like amplifier/converter (AC modules). The AC modules give the system the capacity to record from active electrodes. With four of…Read More
Is every TMS system EEG compatible?
Maybe. There is no way the EEG system can harm the TMS system, but there are some TMS systems that are essentially useless with some EEG systems. You need a a suitable combination of features in each to be successful at all in using TMS with EEG. Desirable attributes: Coils designed specifically for use with…Read More
What is the difference between 1020 and ABC electrode / cap labels?
Electrodes and head caps can have positions derived from systems based on the International 1020 System. When the positions are based on 1020, the labels on the caps and electrodes can either be the actual 1020 position names (such as Fp1, Cz, etc) or they can be what is called ABC, which actually means A1,…Read More
Can I ship multiple work orders in one box?
If you have more than one item to be repaired, we will normally issue a separate work order number for each item. In that case, it is not necessary to ship the items to us separately. They can be packed together, assuming you pack carefully and include the documentation we request when we send you…Read More
Are there any restrictions to carrying BioSemi ActiveTwo equipment on commercial aircraft — particularly the battery?
The system does not use Lithium Ion batteries that are the focus of a lot of recent concern, but our shippers and airlines may ask questions about the battery. ActiveTwo is safe to be put in checked luggage or carried on board aircraft. It uses sealed, non-spillable lead-acid batteries that are safe to fly. On the…Read More
What size adhesive washer do I need?
The inside diameter of adhesive ring should be about the same size as, or larger than, the diameter of the electrode contact. The inside diameter of the adhesive ring should not be larger than the outer diameter of the electrode housing. The outside diameter minus the center hole determines how much surface area contacts the…Read More