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VPixx
Technologies products
offer solutions to some of the more difficult technical challenges
facing vision scientists around the world today. Our
revolutionary DATAPixx data acquisition and graphics
system provides researchers with a hardware toolbox
implementing high performance video, analog I/O, digital I/O, and audio
I/O. By implementing all of these input / output functions in
a single peripheral, the DATAPixx resolves the long-standing technical
challenge of precisely synchronizing data input / output with video
refresh. For greatest flexibility under Mac OS X and Windows
XP, the DATAPixx can
be programmed through an ANSI C API, or from within the MATLAB
environment. For greatest convenience, the VPixx visual
testing program for Mac OS X can be used to quickly set up and run
experiments, and gather data.
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- Dual VGA outputs
with 16-bit video DACs for
generation of very low contrast stimuli, with microsecond
synchronization between left / right displays
- 16
analog-to-digital converter channels with
16-bit resolution, fast 200 kSPS simultaneously sampled inputs, and
microsecond
synchronization to video refresh
- 4
digital-to-analog converter channels with
16-bit resolution, fast 1 MSPS simultaneously updated
outputs,
and microsecond synchronization to video refresh
- Stereo audio
microphone input
for low-latency
verbal response time measurement
- Stereo audio
output with 96 kSPS updates, and
microsecond control over phase between audio left, audio right, and
video refresh
- 24 TTL outputs
for triggering external
equipment with microsecond synchronization to video refresh
- 24 TTL inputs
with microsecond timetagged
transitions, for high accuracy button response time measurement
- VESA mini-DIN-3
output for driving stereo
goggles
- USB 2.0
interface to host computer for data
transfer
- No special
graphics board needed, can be used
with a laptop
- Software support
includes low-level ANSI C API,
MATLAB, Octave (open source), and high-level VPixx visual testing
program for Mac OS X
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- Low-cost version
of the popular DATAPixx system
- Dual VGA outputs
with 16-bit video DACs for
generation of very low contrast stimuli, with microsecond
synchronization between left / right displays
- 24 TTL outputs
for triggering external
equipment with microsecond synchronization to video refresh
- 24 TTL inputs
with microsecond timetagged
transitions, for high accuracy button response time measurement
- VESA mini-DIN-3
output for driving stereo
goggles
- Can be field
upgraded to the full-function DATAPixx when analog or audio I/O
required by lab
- USB 2.0
interface to host computer
for data
transfer
- No special
graphics board needed, can be used
with a laptop
- Software support
includes low-level ANSI C API,
MATLAB, Octave (open source), and high-level VPixx visual testing
program for Mac OS X
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- Button response
boxes available in three form
factors:
1) tabletop with 5 large robust buttons
2) handheld with 5 thumb buttons
3) dual handheld with 2 thumb buttons each
- Guaranteed
microsecond-precise reaction time
measurement when interfaced to DATAPixx system
- Illuminated
buttons can cue subjects when a
response is
required, and which responses are valid
- Contact factory
for configuration details
- Custom
configurations are possible
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- Button response
boxes available in two form
factors:
1) handheld with 4 thumb buttons
2) dual handheld with 2 thumb buttons each
- Guaranteed
microsecond-precise reaction time
measurement when interfaced to DATAPixx system
- Built of 100%
plastic and fiber optic parts.
- Magnetically and
RF inert
- Contact factory
for configuration details
- Custom
configurations are possible
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- VPixx
Technologies has secured a number of new
21" CRTs
- Model is
ViewSonic G225fB
- Very fine 0.20
mm dot pitch
- Perfectly flat
screen
- Vertical refresh
rate up to 160 Hz
- Available with
DATAPixx system
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- A single design
document contains all the
stimuli for an experiment
- Each stimulus is
a list of region definitions
and sequencing commands
- Each region
contains a list of patterns which
can be mathematically combined
- Double-clicking
on a stimulus, region, pattern,
or command will open a parameter dialog for convenient stimulus editing
- Stimulus
sequences controlled with per-frame
resolution
- Stimuli can be
incorporated into many testing
paradigms including Constant Stimuli, Adjustments, Habituation,
Staircase, and VPEST
- Calibrated
region colors can be specified in
LMS (cone response), and the CIE spaces XYZ, Lxy, Lu'v', L*u*v*, and
L*a*b*
- Stimulus
sequences can be exported as picture
files and Quicktime movies for publishing or classroom demonstrations
- Supports
DATAPixx data acquisition and graphics
system
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- NOTE: The VPGA
is a PCI-only board, and is not
recommended for new installations. Please refer to the DATAPixx
which
offers increased performance and greater functionality.
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