Search found 1147 matches

by Coen
Fri Nov 15, 2024 7:45 pm
Forum: BioSemi Hardware
Topic: Error 5000
Replies: 13
Views: 19190

Re: Error 5000

Contact your local BioSemi representative
by Coen
Fri Nov 15, 2024 6:36 pm
Forum: BioSemi Hardware
Topic: Error 5000
Replies: 13
Views: 19190

Re: Error 5000

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)
by Coen
Fri Nov 15, 2024 1:44 pm
Forum: BioSemi all other topics
Topic: Real-time processing of EEG signals from Active3
Replies: 2
Views: 944

Re: Real-time processing of EEG signals from Active3

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)
by Coen
Tue Nov 12, 2024 5:59 pm
Forum: BioSemi Software (ActiView executable)
Topic: ActiView10 not working with USB2 receiver with Firmware4.0
Replies: 4
Views: 1454

Re: ActiView10 not working with USB2 receiver with Firmware4.0

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 hyper...
by Coen
Mon Nov 11, 2024 3:01 pm
Forum: BioSemi Software (ActiView executable)
Topic: ActiView10 not working with USB2 receiver with Firmware4.0
Replies: 4
Views: 1454

Re: ActiView10 not working with USB2 receiver with Firmware4.0

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 sam...
by Coen
Wed Nov 06, 2024 6:30 pm
Forum: BioSemi Software (ActiView executable)
Topic: Errors 7000 and 7001
Replies: 2
Views: 559

Re: Errors 7000 and 7001

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)
by Coen
Thu Oct 31, 2024 3:41 pm
Forum: BioSemi Hardware
Topic: hardware filters
Replies: 3
Views: 2287

Re: hardware filters

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).
by Coen
Thu Oct 31, 2024 3:25 pm
Forum: BioSemi all other topics
Topic: BIOSEMI Trigger and EEGLAB reading events
Replies: 1
Views: 566

Re: BIOSEMI Trigger and EEGLAB reading events

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 MS...
by Coen
Thu Oct 24, 2024 6:38 pm
Forum: BioSemi Software (ActiView executable)
Topic: Older Versions Repository? Looking for ActiView Version 705
Replies: 1
Views: 735

Re: Older Versions Repository? Looking for ActiView Version 705

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)
by Coen
Wed Oct 02, 2024 1:52 pm
Forum: BioSemi Hardware
Topic: hardware filters
Replies: 3
Views: 2287

Re: hardware filters

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)
by Coen
Wed Sep 25, 2024 1:32 pm
Forum: BioSemi all other topics
Topic: Hyperscanning with LabStreamingLayer
Replies: 6
Views: 4295

Re: Hyperscanning with LabStreamingLayer

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)
by Coen
Tue Sep 24, 2024 3:19 pm
Forum: BioSemi all other topics
Topic: Hyperscanning with LabStreamingLayer
Replies: 6
Views: 4295

Re: Hyperscanning with LabStreamingLayer

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

Best regards, Coen (BioSemi)
by Coen
Mon Sep 23, 2024 2:30 pm
Forum: BioSemi all other topics
Topic: Hyperscanning with LabStreamingLayer
Replies: 6
Views: 4295

Re: Hyperscanning with LabStreamingLayer

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)
by Coen
Mon Sep 09, 2024 6:24 pm
Forum: BioSemi Hardware
Topic: Error 5000
Replies: 13
Views: 19190

Re: Error 5000

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

Best regards, Coen (BioSemi)
by Coen
Fri Sep 06, 2024 5:24 pm
Forum: BioSemi Hardware
Topic: Error 5000
Replies: 13
Views: 19190

Re: Error 5000

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)
by Coen
Fri Sep 06, 2024 4:15 pm
Forum: BioSemi Hardware
Topic: Error 5000
Replies: 13
Views: 19190

Re: Error 5000

What is the serial number of your AD-box ?

Best regards, Coen (BioSemi)
by Coen
Tue Aug 06, 2024 2:33 pm
Forum: BioSemi Software (ActiView executable)
Topic: How to open .cgf
Replies: 1
Views: 3422

Re: How to open .cgf

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 1...
by Coen
Mon Jul 15, 2024 6:03 pm
Forum: BioSemi Software (ActiView executable)
Topic: Detailed review on the concept of offset?
Replies: 4
Views: 6149

Re: Detailed review on the concept of offset?

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)
by Coen
Fri Jul 12, 2024 7:15 pm
Forum: BioSemi Software (ActiView executable)
Topic: Detailed review on the concept of offset?
Replies: 4
Views: 6149

Re: Detailed review on the concept of offset?

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 ...
by Coen
Fri Jun 07, 2024 2:36 pm
Forum: BioSemi all other topics
Topic: Modify ActiView Configuration
Replies: 1
Views: 9403

Re: Modify ActiView Configuration

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)
by Coen
Thu May 30, 2024 1:38 pm
Forum: EEG data analysis
Topic: Seeking help with CMS and DRL location with EEGLAB
Replies: 2
Views: 13001

Re: Seeking help with CMS and DRL location with EEGLAB

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

Best regards, Coen (BioSemi)
by Coen
Sat Mar 09, 2024 5:48 pm
Forum: BioSemi Software (ActiView executable)
Topic: Event Related Average module
Replies: 4
Views: 15054

Re: Event Related Average module

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)
by Coen
Fri Mar 08, 2024 7:23 pm
Forum: BioSemi Hardware
Topic: Active Two Questions (CM. ABR, etc.)
Replies: 4
Views: 10620

Re: Active Two Questions (CM. ABR, etc.)

The trigger port needs TTL level signals. In order to connect an audio line signal, you will need to convert to TTL with a comparator and flip-flop. The accuracy of trigger timing is one sample length, see https://www.biosemi.com/faq/review_trigger_timing.htm

Best regards, Coen
by Coen
Fri Mar 08, 2024 1:56 pm
Forum: BioSemi Hardware
Topic: Active Two Questions (CM. ABR, etc.)
Replies: 4
Views: 10620

Re: Active Two Questions (CM. ABR, etc.)

It is a custom made system for 16+3 channel ECG (LA RA LL is the Wilson Central Terminal). It is probably something like 20 years old. Please email the serial number to info@biosemi.com, and I can check which upgrades are still possible. Soundcard to trigger interface can be done with the ERGO-OPTIC...
by Coen
Wed Feb 14, 2024 2:42 pm
Forum: BioSemi Software (ActiView executable)
Topic: Editing 32-channels in default.cfg
Replies: 3
Views: 8285

Re: Editing 32-channels in default.cfg

Do not edit CFGs in Notepad.

Open ActiView, set the controls according to your preferences, make a short data file, select the "about" tabpage and save your front-panel settings in a new CFG.

Best regards, Coen (BioSemi)
by Coen
Wed Feb 14, 2024 2:37 pm
Forum: BioSemi all other topics
Topic: Use few electrodes than64
Replies: 2
Views: 8678

Re: Use few electrodes than64

No, best regards, Coen (BioSemi)