User Reference:TransmissionFilter

Function

The TransmissionFilter forwards a subset of input channels to its output. Typically, it is used as the very last stage of the data acquisition module to select a subset of recorded channels for on-line processing, thus reducing data transmission overhead and processing load.

Parameters

TransmitChList

A list of input channels to be forwarded to the filter's output. May be defined as a list of channel names, ordinal channel numbers, wildcard patterns, or ranges.

Wildcard patterns may contain the usual * and ? wildcards, character sets enclosed in [], and may be negated by prepending an exclamation mark.
Ranges are given by begin and end, separated with a colon (:) or minus (-). Either of begin and end may be omitted, resulting in the full available range.

Channel labels are forwarded if present for the input signal.

Examples

Each of * : - 1: 1- will match the full range of available channels.
!EOG* matches all channels except those whose names begin with "EOG".
*z will match all central electrodes.
??? will match all channels whose names consist of exactly three characters.

SynthesizedChannels

A list of expressions used to create additional channels from existing information, such as BCI2000 state variables and channel data. Synthesized channels will have their expression as a label, and will be appended to transmitted channels at the end.

Example

When User_Reference:Logging_Input, the position will be present in the MousePosX and MousePosY state variables. To obtain additional channels with this information, set SynthesizedChannels to

MousePosX MousePosY

States

None.