Quest HD

Turn-Key Mobile EEG and ERP

Small and lightweight, the Quest HD frees your subjects to move freely and engage in natural behavior. Capable of true high density recording with a max channel count of up to 512 channels, with 24-bit resolution and sampling rate of 7.k ksps for the highest quality data.

Integrating with the Explorer line’s Compass software allows for turn-key setup with automatic device and accessory recognition, and an array of useful features including real-time impedance measurement, integrated video tracking through multiple USB cameras, and graphical control of ERP triggers and configuration.

The Quest HD elimates the need for cables, featuring wireless data transmission, an integrated battery, and internal data storage. With on-board processing, and a bevy of inputs and outputs, and a powerful yet user-friendly API, the Quest HD can be custom programmed for your unique paradigms with real-time control of external devices, stimulators and trackers. In addition to EEG and ERPs, the Quest is also compatible with the Explorer EMG front end for concurrent bipolar EMG recordings.

Highlights

  • A completely wearable EEG/ERP solution, with wireless communication and on-board data storage
  • On-board processing and an easy-to-use API for custom applications
  • Meets safety standards for laboratory and clinical research

Specifications

Quest HD Processor

Number of Channels up to 512
Analog I/O up to 28 inputs and 28 outputs
Digital I/O up to 20 input and 20 outputs, plus 2 strobes
Battery Life Internal, up to 2 hours; External, 4 – 6 hours
Data Communication with PC Gigabit Ethernet or Wi-Fi
Dimensions 183 mm x 95 mm x 36 mm
Weight 700 g

Recording

Resolution 24-bit
Inferred Noise <1 μVrms
Common Mode Rejection Ratio -110dB
Input Range Min ± 0.1875 V at a gain of 24
Input Range Max ± 2 V at a gain of 1
Input Impedance 1 GΩ, 20 pF

Quest HD+Stim

Concurrent Transcranial Stimulation and Electroencephalography

Adding to the mobility and features of the Quest HD, the Quest HD+Stim add the ability to do concurrent tCS along with your EEG and ERP recordings.

Powerful on-board processing allows for generation of complex waveforms, allowing you to use common tCS modalities (such as tDCS, tACS, tPCS or tRCS) or experiment with novel waveforms, even modulating or creating stimuli based on the subject’s behavioral or electrophysiological responses. Stimulation can be applied to any of the recording channels, with a switch time of less than a millisecond.

Highlights

  • Concurrent tCS and EEG/ERP
  • Selectable stimulation channels (switch time < 1ms)
  • Closed-loop control of tCS parameters
  • All of the mobility and features of the Quest HD
  • Meets safety standards for laboratory and clinical research

Specifications

Quest HD Processor

Number of Channels up to 512
Analog I/O up to 28 inputs and 28 outputs
Digital I/O up to 20 input and 20 outputs, plus 2 strobes
Battery Life Internal, up to 2 hours; External, 4 – 6 hours
Data Communication with PC Gigabit Ethernet or Wi-Fi
Dimensions 183 mm x 95 mm x 36 mm
Weight 700 g

Recording

Resolution 24-bit
Inferred Noise <1 μVrms
Common Mode Rejection Ratio -115dB
Input Range Min ± 0.1875 V at a gain of 24
Input Range Max ± 2 V at a gain of 1
Input Impedance 300 MΩ, 150 pF

Stimulation

Current Range 100 μA – 15 mA
Compliance Voltage ± 9 V to ± 30 V (configurable)
Pulse Width Min 33μs
Bandwidth DC to 120kHz

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