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Element Icon BioGraph Signal
Category: Signal Acquisition AddIn: Signal Processing
Creator: OkazoLab Scope: Experiment
Owns Snippets: None Usage: Snippets


NameDescription                              ConstraintsTypeOn
Biograph Server
Biograph Server Address        Defines the address of a computer on which the Biograph server is running. Use '', if the Biograph server runs on the same computer.                String         
Biograph Port Number        Defines the port number of the Biograph server                Int32         
Sampling Rate        Defines the requested sampling rate (in Hz) of the Biograph server                Double         
Action Channel Info
Update Channel Info Now        Assign 'true' at the runtime, to update the channel info by code                Boolean         
Channel Type        Returns an array of action channels types from the current configuration of the Biograph server.                cxcAct..         
Threshold1        Returns a double array of the thresholds 1 from the current configuration of the Biograph server.                Double..         
Threshold2        Returns a double array of the thresholds 2 from the current configuration of the Biograph server.                Double..         
Scale Minimum        Returns a double array of the signal scale minimums from the current configuration of the Biograph server.                Double..         
Scale Maximum        Returns a double array of the signal scale maximums from the current configuration of the Biograph server.                Double..         
Signal Generator
Signal Source        Defines a source for the signal. The emulated rhythmes can be used for offline validation of the chosen analysis settings                enEmul..         
Emulated Sampling Rate        Defines the emulation sampling rate (samples per second), when data is generated or streamed from a file.                Double         
Primary Frequency        Defines the frequency of the primary rhythm in the generated signal, in Hz. Assign the zero to exclude the primary frequency from the generated signal.                Double         
Secondary Frequency        Defines the frequency of the secondary rhythm in the generated signal, in Hz. The secondary frequency magnitude is a half of the primary frequency magnitude. Assign the zero to exclude the secondary frequency from the generated signal.                Double         
Noise Level        Defines the noise level (in % to the norm magnitude of the primary frequency). The noise is added to the generated signal. Assign the zero the exclude the noise from the generated signal.                Double         
External Datafile        Opens the dialog for selecting a data file containing a stream of double numbers representing a signal. If a file name without a path is defined, the data file will be picked up in the location of the experiment file.                String         
Channel Configuration
Selected Channels        Defines what signal channels are selected for acquisition within EventIDE. Selected channels are registered in the EventIDE signal pool at runtime and become available for the signal analysis elements.                IList         
Selected Channel Count        Indicates how many signal channels are currently selected for acquisition                Int32         
Total Channel Count        Indicates how many signal channels are available for acquisition in the total                Int32         
Buffer Size        Defines the size (in samples) of a circular buffer that stores incoming signal data.                Int32         
Runtime Control
Reset Signals Now        Runtime commands that resets the signal buffers and data acquisition                Boolean         
Is Enabled        If set to false the element is completely omitted when the experiment is run                Boolean         
Title        Title of the element                String         

BioGraph Signal Element reads and buffers real-time signals provided by the Biograph server application, which, in turn, collects and pre-processes data from various bio-sensor hardware Thought Technology Ltd. The Biograph server can be run either in parallel with EventIDE, or on a separate computer in a network.


The Biograph element reads arbitrary signals sent via a network by the Biograph server application. The signals conveys so-called 'Biograph actions', which may include binary, percentage or numerical values depending on the signal type. Up to 64 signals can be processed in parallel. As an experiment starts, the element begins receiving data and buffering signal samples into circular buffers, maintained by EventIDE (the buffers can collect data from multiple signal acquisition elements) at the fixed rate of 16Hz. The signal processing elements, e.g. Signal Analyzer element can be then used to monitor and analyze the buffered signals at run-time. Fast buffering and processing time in EventIDE allows instant detection of signal characteristics and, subsequently, various forms of signal-based feedback control in experiments.

Practical Use

  1. Make use that the Biograph server application is operational and connected to the EventIDE computer by a network (or, runs on the same computer).
  2. Add a new Biograph Signal element to any event in your experiment (the element is global and works from the start to the end of experiment).
  3. Select the new Biograph Signal element and browse its properties in the Property panel.
  4. Set the Biograph Server Address and Biograph Port Number properties, if necessary.
  5. Select the channels for acquisition and buffering via the Selected channels property.
  6. Update the Action Channels Info by requesting the Biograph configuration with the Update Channel Info action
  7. Once the channels are selected, you can access them with by of the signal processing elements.


  • Reading the Biograph signals performs in the main Control Loop of an EventIDE experiment. If the control loop interval exceeds 62.5 ms (e.g. during heavy graphical updates), some data samples can be lost. Normally, the control loop interval stays within 1ms, which is safe for loosless signal reading.

  Name Size
- BioGraph-Signal-Element-Icon.png 4.33 KB
- BiographIcon.png 4.39 KB

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