Difference between revisions of "Contributions:NihonKohdenSource"

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Revision as of 21:31, 22 November 2015


The Nihon Kohden JE-120A amplifier is a clinical monitoring system capable of acquiring EEG or ECoG signals from up to 256 channels. Paired with the QI-123A LAN converter box, this system can provide a research data stream in addition to the clinical data stream. The research data stream can be sampled at up to 2kHz for 256 channels, 5kHz for 128 channels or 10kHz for 64 channels.





Griffin Milsap (griffin.milsap@gmail.com) Johns Hopkins University

Peter Brunner (brunner@neurotechcenter.org) Wadsworth Center - National Center for Adaptive Neurotechnologies

Version History

Version 1.0: November 2015

  • #

Source Code Revisions

  • Initial development: 4913
  • Tested under: #
  • Known to compile under: 4913
  • Broken since: --

Functional Description



  • SourceCh total number of channels to be acquired from the source module or auto for all channels (256 channels)
  • SampleBlockSize number of samples acquired in each block or auto for default setting (1/10th of sampling rate)
  • SampleRate determines the rate at which the device samples data.
  • ChannelNames is a convenience parameter. Name channels here and they can be referenced by these names later.
  • SourceChOffset auto for default settings (0 for each channel).
  • SourceChGain auto for default settings (1 for each channel).
  • SourceChList list of channels that should be acquired or auto for all channels
  • SourceBufferSize

Valid Operating Modes

The NihonKohdenSource only accepts specific sampling rates. The number of channels acquire is limited at sampling rates of 5000 Hz and above. The following table shows all valid combinations of sample rate and maximum number of channels.

Sample Rate Max SourceCh
100 Samples per second 256 Channels
200 Samples per second 256 Channels
500 Samples per second 256 Channels
1000 Samples per second 256 Channels
2000 Samples per second 256 Channels
5000 Samples per second 128 Channels
10000 Samples per second 64 Channels

Valid Operating Modes

State Variables

See also

User Reference:Filters, Contributions:ADCs