Send the red receiver to BioSemi, we will replace it with a white one (we still have a few).
Best regards, Coen (BioSemi)
Search found 1134 matches
- Mon Sep 09, 2024 6:24 pm
- Forum: BioSemi Hardware
- Topic: Error 5000
- Replies: 9
- Views: 14469
- Fri Sep 06, 2024 5:24 pm
- Forum: BioSemi Hardware
- Topic: Error 5000
- Replies: 9
- Views: 14469
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)
Best regards, Coen (BioSemi)
- Fri Sep 06, 2024 4:15 pm
- Forum: BioSemi Hardware
- Topic: Error 5000
- Replies: 9
- Views: 14469
Re: Error 5000
What is the serial number of your AD-box ?
Best regards, Coen (BioSemi)
Best regards, Coen (BioSemi)
- Tue Aug 06, 2024 2:33 pm
- Forum: BioSemi Software (ActiView executable)
- Topic: How to open .cgf
- Replies: 1
- Views: 2413
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...
- Tue Aug 06, 2024 2:03 pm
- Forum: BioSemi Hardware
- Topic: CMS/DRL are unstable
- Replies: 1
- Views: 6714
- Mon Jul 15, 2024 6:03 pm
- Forum: BioSemi Software (ActiView executable)
- Topic: Detailed review on the concept of offset?
- Replies: 4
- Views: 4014
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)
Best regards, Coen (BioSemi)
- Fri Jul 12, 2024 7:15 pm
- Forum: BioSemi Software (ActiView executable)
- Topic: Detailed review on the concept of offset?
- Replies: 4
- Views: 4014
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 ...
- Fri Jun 07, 2024 2:36 pm
- Forum: BioSemi all other topics
- Topic: Modify ActiView Configuration
- Replies: 1
- Views: 8320
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)
Best regards, Coen (BioSemi)
- Thu May 30, 2024 1:38 pm
- Forum: EEG data analysis
- Topic: Seeking help with CMS and DRL location with EEGLAB
- Replies: 2
- Views: 9421
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)
Best regards, Coen (BioSemi)
- Thu Apr 18, 2024 10:29 pm
- Forum: BioSemi Software (ActiView executable)
- Topic: Making a config file
- Replies: 1
- Views: 3596
- Sat Mar 09, 2024 5:48 pm
- Forum: BioSemi Software (ActiView executable)
- Topic: Event Related Average module
- Replies: 4
- Views: 12845
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)
Best regards, Coen (BioSemi)
- Fri Mar 08, 2024 7:23 pm
- Forum: BioSemi Hardware
- Topic: Active Two Questions (CM. ABR, etc.)
- Replies: 4
- Views: 8364
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
Best regards, Coen
- Fri Mar 08, 2024 1:56 pm
- Forum: BioSemi Hardware
- Topic: Active Two Questions (CM. ABR, etc.)
- Replies: 4
- Views: 8364
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...
- Wed Feb 14, 2024 10:15 pm
- Forum: BioSemi Software (ActiView executable)
- Topic: Editing 32-channels in default.cfg
- Replies: 3
- Views: 6297
- Wed Feb 14, 2024 2:42 pm
- Forum: BioSemi Software (ActiView executable)
- Topic: Editing 32-channels in default.cfg
- Replies: 3
- Views: 6297
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)
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)
- Wed Feb 14, 2024 2:37 pm
- Forum: BioSemi all other topics
- Topic: Use few electrodes than64
- Replies: 2
- Views: 7132
Re: Use few electrodes than64
No, best regards, Coen (BioSemi)
- Sun Dec 03, 2023 5:24 pm
- Forum: EEG data analysis
- Topic: Change list of electrodes in BDF format from ABC to 10-20
- Replies: 3
- Views: 10791
- Mon Nov 27, 2023 2:52 pm
- Forum: EEG data analysis
- Topic: Change list of electrodes in BDF format from ABC to 10-20
- Replies: 3
- Views: 10791
Re: Change list of electrodes in BDF format from ABC to 10-20
Use ActiTools --> Editor (https://www.biosemi.com/download/ToolsF ... 02-Win.zip)
Best regards, Coen (BioSemi)
Best regards, Coen (BioSemi)
- Tue Nov 07, 2023 2:47 pm
- Forum: BioSemi Hardware
- Topic: Biosemi simultaneous Biopac
- Replies: 1
- Views: 7954
Re: Biosemi simultaneous Biopac
Why don't you measure simultaneous EEG and ECG (extra TP-flat electrodes) with the BioSemi system ?
Best regards, Coen (BioSemi)
Best regards, Coen (BioSemi)
- Tue Oct 31, 2023 3:11 pm
- Forum: EEG data analysis
- Topic: How Can I Verify That ActiveTwo USB-Receiver 5.1 Is Receiving Triggers from PsychoPy 3?
- Replies: 4
- Views: 10994
Re: How Can I Verify That ActiveTwo USB-Receiver 5.1 Is Receiving Triggers from PsychoPy 3?
Select the "analog" trigger format and trigger line 1-16 are displayed as colored dots/bars. Select the "decimal" trigger format and the triggers are displayed as two groups of 8 bit numbers.
- Tue Oct 31, 2023 2:33 pm
- Forum: EEG data analysis
- Topic: How Can I Verify That ActiveTwo USB-Receiver 5.1 Is Receiving Triggers from PsychoPy 3?
- Replies: 4
- Views: 10994
Re: How Can I Verify That ActiveTwo USB-Receiver 5.1 Is Receiving Triggers from PsychoPy 3?
If the triggers are received, then they are shown in ActiView.
- Fri Oct 20, 2023 12:52 pm
- Forum: BioSemi all other topics
- Topic: ActiView TCP server
- Replies: 11
- Views: 23783
Re: ActiView TCP server
Filtering the TCP outputs is not a standard option in ActiView, it is only possible by modifying the (open source LabVIEW) code. You could consider programming a simple low pass in you C++ client. High frequency interference on the photo sensor signal is usually caused by 100 Hz fluctuating light fr...
- Tue Oct 10, 2023 7:32 pm
- Forum: BioSemi Hardware
- Topic: Sending triggers from Response Switch through parallel port to psychopy
- Replies: 3
- Views: 10594
Re: Sending triggers from Response Switch through parallel port to psychopy
You have to make a suitable cable to route pins 17+18 of the USB-receiver to readable pins of the psychopy PC.
Best regards, Coen (BioSemi)
Best regards, Coen (BioSemi)
- Tue Oct 03, 2023 5:37 pm
- Forum: BioSemi all other topics
- Topic: ActiView TCP server
- Replies: 11
- Views: 23783
Re: ActiView TCP server
The timing across the channels is only determined by the sampling moments. All ADCs (EEG and sensors) in the AD-box sample at the same moment, controlled by the same clock pulse (sampling is synchronous within 10 picosecond). The trigger channel is added in the USB-receiver with a precision of one s...
- Mon Sep 25, 2023 4:00 pm
- Forum: BioSemi all other topics
- Topic: Trouble with repairing BDF file
- Replies: 8
- Views: 15816
Re: Trouble with repairing BDF file
We have inspected the file, all the data (not just the triggers) is corrupted after 1960 seconds (total file is 4576 sec). In an Hex-file-editor, we can see that after 1960 seconds the data is from an Excel file. It looks like hard disk problems, but how this could happen without error popups is puz...
- Mon Sep 25, 2023 3:29 pm
- Forum: BioSemi all other topics
- Topic: ActiView TCP server
- Replies: 11
- Views: 23783
Re: ActiView TCP server
The photosensor does not output negative values. You can connect a signal generator to the ERGO (see https://www.biosemi.nl/forum/viewtopic.php?f=1&t=931&p=2854 ). Even easier is to connect a potentiometer (approx. 10k linear) between pin 1 and 3 with the wiper to pin 4 and pin 5 to pin 2 (ERGO will...
- Mon Sep 25, 2023 2:38 pm
- Forum: BioSemi all other topics
- Topic: Trouble with repairing BDF file
- Replies: 8
- Views: 15816
Re: Trouble with repairing BDF file
It appeared that the header and part of the data at the beginning of the file were missing (we have no idea how the file could get corrupted like this, we have never seen anything similar). We could repair the file by stripping the begin of the file until the start of a whole 1 sec data block, addin...
- Thu Sep 21, 2023 9:41 pm
- Forum: BioSemi Hardware
- Topic: Sending triggers from Response Switch through parallel port to psychopy
- Replies: 3
- Views: 10594
Re: Sending triggers from Response Switch through parallel port to psychopy
With "RespSwitch=1" in the CFG, the button triggers are available on pins 17 and 18 of the trigger port on the USB-receiver, see https://www.biosemi.com/faq/trigger_signals.htm . I understand that you acquire the psychopy triggers with the AIB. Why don't you connect the psychopy triggers directly to...
- Thu Sep 21, 2023 2:32 pm
- Forum: BioSemi all other topics
- Topic: Trouble with repairing BDF file
- Replies: 8
- Views: 15816
Re: Trouble with repairing BDF file
The first bytes of the header are already corrupted, and it looks like a lot of fields have been overwritten with zero's. We have only seen things like that when a computer crashes during recording (although usually in such cases only the file length field is wrong and can be easily repaired). Pleas...
- Thu Sep 21, 2023 2:03 pm
- Forum: BioSemi Software (ActiView executable)
- Topic: Acquisition software SDK support for ARM platforms
- Replies: 1
- Views: 9717
Re: Acquisition software SDK support for ARM platforms
The ARM processor is not supported by BioSemi. The driver source code is proprietary and not made available to BioSemi users. The best way to proceed is to set up an extra thread in (open source LabVIEW) ActiView to read data from the ringbuffer (example code is available). The extra thread runs par...