User Reference:gHIamp

Synopsis

The g.HIamp is a 256 channel amplifier from g.tec. The contributed source module acquires raw signals from the amplifier in real time for use in BCI2000.

Location

http://www.bci2000.org/svn/trunk/src/contrib/SignalSource/gHIampSource

Versioning

Authors

Griffin Milsap (griffin.milsap@gmail.com) Rensselaer Polytechnic Institute

Version History

Version 0.9: August 2011

Supports one g.HIamp
Supports Filters
Referencing by any channel
Future compatible with g.HIamp master/slave configurations
Using g.HIamp C API version 1.11.02

Source Code Revisions

Initial development: 3472
Tested under: 3763
Known to compile under: 3798
Broken since: --

Functional Description

Acquires raw data from the g.HIamp.

Installation

Compile the gHIampSource module using CMake and your compiler. The resulting gHIampSource.exe should be placed in the prog directory automatically.

Parameters

SourceCh represents the total number of channels to be logged from the source module.
SampleBlockSize should be set equal to the size of the sample block pulled from the device.
SampleRate
ChannelNames
SourceChOffset
SourceChGain
DeviceIDMaster
DeviceIDs
RefChList
SourceChList
FilterEnabled
FilterHighPass
FilterLowPass
FilterModelOrder
FilterType
NotchEnabled
NotchHighPass
NotchLowPass
NotchModelOrder
NotchType
SourceBufferSize

Valid Operating Modes

The gHIamp only accepts specific combinations of sampling rates and sample block sizes. The following table shows all valid combinations of sample rate and block size. Operating outside of these modes is untested and could result in problems.

Sample Rate	Valid Sample Block Sizes
256 Samples per second	1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 32 64 128 256
512 Samples per second	2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 32 64 128 256
600 Samples per second	4 5 6 7 8 9 10 11 12 13 15 16 17 32 64 128 256
1200 Samples per second	8 9 10 11 12 13 14 15 16 32 64 128 256
2400 Samples per second	16 32 64 128 256
4800 Samples per second	32 64 128 256