Multimodal Trigger Conditioner Box

- low level inputs
- high level inputs
- optical inputs

 

Highlights

simply use PowerPoint for stimulus/paradigm setup and presentation
1.5 kV isolation between trigger inputs and outputs
use various trigger sources from visual, auditory, electrical or tactile stimulators
connect to a data acquisition system, g.MOBIlab+ or g.USBamp
compatible to many other user-specific systems
use one encoded trigger channel for up to 16 different experimental conditions

What is g.TRIGbox - Multimodal Trigger Conditioner Box ?


The g.TRIGbox is a device to generate trigger pulses from various sensors or input signals. Input and output lines are isolated from each other. The trigger outputs can be connected to a data acquisition system (such as g.Recorder or g.MOBIlab+) or to the input sockets of g.USBamp biosignal amplifier. Thus, g.TRIGbox provides an exact detection and recording of almost any type of stimulation in your experimental paradigms. It's wide range of possible input signals and sensors allows the use of various trigger sources such as sound card outputs, microphones, piezoelectric or inductive sensors, response buttons, various logic signals (TTL, C-MOS, ...) provided by external stimulators, visual markers from the computer monitor, LED indicators, flash lamps or slide projectors. The threshold levels are adjustable separately for each channel. 4 LEDs indicate the proper detection for each channel.

The output signals are rectangular pulses with a minimum length of 20 ms assuring a reliable recording of all events even for low sampling frequencies. An additional analog encoded trigger output enables the recording of up to 16 different experimental conditions. For this case the output signal displays 16 different output voltage levels to be decoded during data analysis (e.g. with g.BSanalyze).

The optical sensors which can be fixed at the computer screen easily allow the quick and comfortable generation of experimental paradigms and stimulation patterns for psychophysiological studies. No special stimulation software is needed anymore. A simple and easy way is provided by use of PowerPoint for stimulus presentation. See the example below showing a sequence of stimuli used for a study on the influence of negative and neutral emotional visual impressions presented to the left vs. right visual field on EEG and GSR parameters.

Download info sheet (PDF 0.6 MByte)

Specifications    
Trigger output voltage:
   + 5 V (+ 200 mV if delivered for g.USBamp)
Input voltage (low level):
   +/- 0.5 mV to +/- 200 mV (4 inputs)
Input voltage (high level):
   +/- 100 mV to +/- 5 V (4 inputs)
Trigger output duration:
   min. 20 ms
Supply:
   9 V battery (or rechargeable)
Current consumption:
   ~ 40 mA
Low battery indicator:
   ~ 7 V
Isolation voltage between inputs and outputs:
   1.5 kV

Available accessories

optical sensors for detection of screen markers, LED indicators, flash lamps, slide projectors
push buttons for recording of subject responses, reaction times, ...
dynamic microphone to detect auditory stimuli
specialized user-specific sensors on request
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