View source for 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 [[Technical Reference:Core Modules#Data Acquisition Module|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 <tt>* : - 1: 1-</tt> will match the full range of available channels.
* <tt>!EOG*</tt> matches all channels except those whose names begin with "EOG".
* <tt>*z</tt> will match all central electrodes.
* <tt>???</tt> will match all channels whose names consist of exactly three characters.

==States==
None.

==See also==
[[Technical Reference:Core Modules]], [[BCI2000 Glossary#Source Signal]]

[[Category:Filters]][[Category:Data Acquisition]]