Difference between revisions of "Contributions:NihonKohdenSource"

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(Functional Description)
 
(One intermediate revision by the same user not shown)
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* '''DigitalMark1''' to '''DigitalMark2'''
 
* '''DigitalMark1''' to '''DigitalMark2'''
 
** not implemented
 
** not implemented
 +
 +
==DC Input From Other Devices==
 +
Analog data from a g.TRIGbox and parallel port can be obtained though the JE120A's DC inputs. A parallel port Y-splitter and a custom cable is necessary. Connection of the custom cables and Y-splitter is outlined in the image below.
 +
 +
[[File:Parrallel Ports to JE120A.jpg|700px|alt text]]
 +
 +
The outputs from the g.TRIGbox and parallel port to the DC input of the JE120A are defined below. Note that the g.TRIGbox trigger outputs are the TTL pins. See [[Contributions:ParallelPortFilter]] for information on how to set the outputs of a parallel port from BCI2000.
 +
{| class="wikitable"
 +
! JE120A
 +
!
 +
! g.TRIGbox
 +
!
 +
! Parallel Port
 +
!
 +
|-
 +
| Pin No.
 +
| Signal
 +
| Pin No.
 +
| Signal
 +
| Pin No.
 +
| Signal
 +
|-
 +
| 1
 +
| DC01
 +
| 1
 +
| Output A
 +
| -
 +
| -
 +
|-
 +
| 2
 +
| DC02
 +
| 2
 +
| Output B
 +
| -
 +
| -
 +
|-
 +
| 3
 +
| DC03
 +
| 3
 +
| Output C
 +
| -
 +
| -
 +
|-
 +
| 4
 +
| DC04
 +
| 4
 +
| Output D
 +
| -
 +
| -
 +
|-
 +
| 5
 +
| DC05
 +
| 5
 +
| Encoded Output
 +
| -
 +
| -
 +
|-
 +
| 6
 +
| DC06
 +
| -
 +
| -
 +
| -
 +
| -
 +
|-
 +
| 7
 +
| DC07
 +
| -
 +
| -
 +
| -
 +
| -
 +
|-
 +
| 8
 +
| DC08
 +
| -
 +
| -
 +
| -
 +
| -
 +
|-
 +
| 9
 +
| DC09
 +
| -
 +
| -
 +
| 2
 +
| Data0
 +
|-
 +
| 10
 +
| DC10
 +
| -
 +
| -
 +
| 3
 +
| Data1
 +
|-
 +
| 11
 +
| DC11
 +
| -
 +
| -
 +
| 4
 +
| Data2
 +
|-
 +
| 12
 +
| DC12
 +
| -
 +
| -
 +
| 5
 +
| Data3
 +
|-
 +
| 13
 +
| DC13
 +
| -
 +
| -
 +
| 6
 +
| Data4
 +
|-
 +
| 14
 +
| DC14
 +
| -
 +
| -
 +
| 7
 +
| Data5
 +
|-
 +
| 15
 +
| DC15
 +
| -
 +
| -
 +
| 8
 +
| Data6
 +
|-
 +
| 16
 +
| DC16
 +
| -
 +
| -
 +
| 9
 +
| Data7
 +
|-
 +
| 24
 +
| GND
 +
| 24
 +
| GND
 +
| 24
 +
| GND
 +
|}
  
 
==See also==
 
==See also==

Latest revision as of 15:16, 30 July 2019

Synopsis

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.

Location

http://www.bci2000.org/svn/trunk/src/private/SignalSource/NihonKohdenSource

Versioning

Authors

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

This setup requires the following components:

  • JE-120A amplifier:
  • QI-123A LAN converter:


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. [edit]

  • Input range: ±3.2 mV or ±12.8 mV (selectable)
  • Effective resolution: 16 bit (97.65 nV/LSB) or 16 bit (390.62 nV/LSB) (selectable)
  • Input impedance: 200 MΩ
  • Sampling Rates: 100Hz, 200Hz, 500Hz, 1000Hz, 2000Hz, 5000Hz, 10000Hz

Clinical Setup

Installation

Parameters

  • 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.

SamplingRate Max SourceCh Aliasing Filter Cut-Off
[samples/sec] [channels] [Hz]
100 256 30 or 35
200 256 60 or 70
500 256 120
1000 256 300
2000 256 600
5000 128 1200
10000 64 3000

Valid Operating Modes

State Variables

  • DC01 to DC16 DC Input data
    • Digital Range: 0 to 65535
    • Analog Range: 0xFFFF(Max)-0x8000(0V)-0x0000(Min). (Signed.)
    • 1LSB: 366.3uV
  • SpO2
    • Digital Range: 0 to 100
    • 0 means 0%, 100 means 100%
  • EtCO2
    • Digital Range: 0 to 100
    • 0 means 0mmHg, 100 means 100mmHg
  • BP1 to BP2
    • not implemented
  • DigitalMark1 to DigitalMark2
    • not implemented

DC Input From Other Devices

Analog data from a g.TRIGbox and parallel port can be obtained though the JE120A's DC inputs. A parallel port Y-splitter and a custom cable is necessary. Connection of the custom cables and Y-splitter is outlined in the image below.

alt text

The outputs from the g.TRIGbox and parallel port to the DC input of the JE120A are defined below. Note that the g.TRIGbox trigger outputs are the TTL pins. See Contributions:ParallelPortFilter for information on how to set the outputs of a parallel port from BCI2000.

JE120A g.TRIGbox Parallel Port
Pin No. Signal Pin No. Signal Pin No. Signal
1 DC01 1 Output A - -
2 DC02 2 Output B - -
3 DC03 3 Output C - -
4 DC04 4 Output D - -
5 DC05 5 Encoded Output - -
6 DC06 - - - -
7 DC07 - - - -
8 DC08 - - - -
9 DC09 - - 2 Data0
10 DC10 - - 3 Data1
11 DC11 - - 4 Data2
12 DC12 - - 5 Data3
13 DC13 - - 6 Data4
14 DC14 - - 7 Data5
15 DC15 - - 8 Data6
16 DC16 - - 9 Data7
24 GND 24 GND 24 GND

See also

User Reference:Filters, Contributions:ADCs