User Reference:SignalGeneratorADC - Revision history

Mellinger: /* RandomSeed */

2025-12-19T15:05:29Z

RandomSeed

← Older revision		Revision as of 15:05, 19 December 2025
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	An [[User Reference:Expression Syntax\|arithmetic expression]] that evaluates to a multiplication factor applied to signal amplitude.		An [[User Reference:Expression Syntax\|arithmetic expression]] that evaluates to a multiplication factor applied to signal amplitude.

	===~~RandomSeed~~===		===NaNChannels===
	~~An initialization~~ value for ~~the system's random number generator~~.		List of channels to set to a NaN value when space bar is pressed. Useful for testing filters. This parameter is only available on Windows.
	~~When a nonzero value~~ is ~~specified, the random number generator will always produce the same sequence, leading to identical pseudorandom noise, which is most useful for testng purposes~~.

	~~If this~~ is ~~zero,~~ the random ~~number generator will be initialized~~ from ~~system time, leading to different noise each time~~.		===SourceProperties===
			A matrix that defines any number of additional virtual brain signal sources by their amplitudes, frequencies, and time offset. May be empty for no additional sources.

			===Mixing matrix===
			A source-to-sensor projection matrix that defines how the signal is formed from the additional virtual brain signal sources.
			May be empty if no additional sources are defined.

			===Variate Timing===
			A nonzero value will introduce random variation into the block duration generated by the source module. The value of this parameter represents the probability for a millisecond sleep before the module returns from its ''Process()'' function.

	===SignalType===		===SignalType===

Mellinger: /* States */

2021-01-15T20:11:15Z

States

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	==States==		==States==
	Any state may occur in the ~~expression~~ given in the ''OffsetMultiplier'' parameter.		Any state may occur in the expressions given in the ''OffsetMultiplier'' and ''AmplitudeMultiplier'' parameter.

	==See also==		==See also==

Mellinger: /* OffsetMultiplier */

2021-01-15T20:10:36Z

OffsetMultiplier

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	This allows to create a test signal that depends on the value of [[BCI2000 Glossary#State\|state variables]].		This allows to create a test signal that depends on the value of [[BCI2000 Glossary#State\|state variables]].
	E.g., to create a simulated evoked response in the [[User Reference:P3SpellerTask\|P300 Speller's]] copy spelling mode, enter ''StimulusType'' as the multiplier expression, and a nonzero value into the ''DCOffset'' parameter.		E.g., to create a simulated evoked response in the [[User Reference:P3SpellerTask\|P300 Speller's]] copy spelling mode, enter ''StimulusType'' as the multiplier expression, and a nonzero value into the ''DCOffset'' parameter.

			===AmplitudeMultiplier===
			An [[User Reference:Expression Syntax\|arithmetic expression]] that evaluates to a multiplication factor applied to signal amplitude.

	===RandomSeed===		===RandomSeed===

Mellinger: /* RandomSeed */

2009-06-04T09:54:27Z

RandomSeed

← Older revision		Revision as of 09:54, 4 June 2009
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	===RandomSeed===		===RandomSeed===
	An initialization value for the system's random number generator.		An initialization value for the system's random number generator.
	When a nonzero value is specified, the random number generator will always produce the same sequence, leading to identical pseudorandom noise.		When a nonzero value is specified, the random number generator will always produce the same sequence, leading to identical pseudorandom noise, which is most useful for testng purposes.

	If this is zero, the random number generator will be initialized from system time, leading to different noise each time.		If this is zero, the random number generator will be initialized from system time, leading to different noise each time.

Mellinger: /* SineFrequency */

2009-06-04T09:53:43Z

SineFrequency

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	===SineFrequency===		===SineFrequency===
	Test signal frequency. When ~~given~~ as a raw number, the frequency is given in terms of the sampling rate. Absolute frequencies may be given as decimal numbers or fractions when directly followed with ''Hz''.		Test signal frequency. When specified as a raw number, the frequency is given in terms of the sampling rate. Absolute frequencies may be given as decimal numbers or fractions when directly followed with ''Hz''.
	Examples:		Examples:
	* ''0.25'' (half the Nyquist frequency),		* ''0.25'' (half the Nyquist frequency),

Mellinger: /* Function */

2009-06-04T09:53:19Z

Function

← Older revision		Revision as of 09:53, 4 June 2009
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	The test signal is a sine wave overlayed with white noise and a DC component.		The test signal is a sine wave overlayed with white noise and a DC component.
	Test signal amplitude may be controlled using the system's pointing device, which is useful in testing SMR type BCI setups.		Test signal amplitude may be controlled using the system's pointing device, which is useful in testing SMR type BCI setups.
	The signal's DC component may ~~follow~~ the value of a state variable, which is useful in testing ERP type BCI setups.		The signal's DC component may reflect the value of a state variable, which is useful in testing ERP type BCI setups.

	==Parameters==		==Parameters==

Mellinger at 10:10, 8 April 2008

2008-04-08T10:10:10Z

← Older revision		Revision as of 10:10, 8 April 2008
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	==See also==		==See also==
	[[User Reference:DataIOFilter]], [[Programming Reference:GenericADC]]		[[User Reference:DataIOFilter]], [[Programming Reference:GenericADC Class]]

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

Mellinger at 19:44, 8 November 2007

2007-11-08T19:44:46Z

← Older revision		Revision as of 19:44, 8 November 2007
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	===OffsetMultiplier===		===OffsetMultiplier===
	An [[User Reference:Expression Syntax\|arithmetic expression]] that evaluates to a multiplication factor applied to the DC offset as given by the ''DCOffset'' parameter.		An [[User Reference:Expression Syntax\|arithmetic expression]] that evaluates to a multiplication factor applied to the DC offset as given by the ''DCOffset'' parameter.
	This allows to create a test signal that depends on the value of [[Glossary#State\|state variables]].		This allows to create a test signal that depends on the value of [[BCI2000 Glossary#State\|state variables]].
	E.g., to create a simulated evoked response in the [[User Reference:P3SpellerTask\|P300 Speller's]] copy spelling mode, enter ''StimulusType'' as the multiplier expression, and a nonzero value into the ''DCOffset'' parameter.		E.g., to create a simulated evoked response in the [[User Reference:P3SpellerTask\|P300 Speller's]] copy spelling mode, enter ''StimulusType'' as the multiplier expression, and a nonzero value into the ''DCOffset'' parameter.

Mellinger: /* See also */

2007-11-08T18:03:29Z

Mellinger: /* OffsetMultiplier */

2007-11-07T17:51:58Z

OffsetMultiplier

← Older revision		Revision as of 17:51, 7 November 2007
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	===OffsetMultiplier===		===OffsetMultiplier===
	An [[User Reference:Expression Syntax\|arithmetic expression]] that evaluates to a multiplication factor applied to the DC offset as given by the ''DCOffset'' parameter.		An [[User Reference:Expression Syntax\|arithmetic expression]] that evaluates to a multiplication factor applied to the DC offset as given by the ''DCOffset'' parameter.
			This allows to create a test signal that depends on the value of [[Glossary#State\|state variables]].
			E.g., to create a simulated evoked response in the [[User Reference:P3SpellerTask\|P300 Speller's]] copy spelling mode, enter ''StimulusType'' as the multiplier expression, and a nonzero value into the ''DCOffset'' parameter.

	===RandomSeed===		===RandomSeed===

← Older revision		Revision as of 18:03, 8 November 2007
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	==See also==		==See also==
	[[User Reference:DataIOFilter]], [[Programming Reference:GenericADC]]		[[User Reference:DataIOFilter]], [[Programming Reference:GenericADC]]

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