- Key Features
AlphaLab SnR integrated, advanced stimulation sources give users the power to deliver complex, unique stimulation patterns on user-specified channels simultaneously. A high saturation point and advanced hardware components give users the ability to stimulate and record on all channels. Current return path controls, current monitors, and immediate stimulation logging give the researcher more control over the experiment.
- Expandability high channel. Each system may have between 16 to 128 channels.
- Data streaming. All data collected by the SnR can be cloned and streamed to multiple computers.
- Multi-user support. Workload may be optionally divided among multiple computers, allowing multiple users to simultaneously access, analyze, and manipulate the data.
- Impedance check. One-click impedance check.
- Digitizing HeadStage. The SnR utilizes a compact, lightweight digitizing HeadStage that samples each channel at up to 44kHz with a 16 bit A/D resolution.
- Low noise. less than 5uV @ 500kΩ electrode and less than 3uV @ ground.
- Differential inputs. The HeadStage uses differential inputs, which enables acquiring different signal types i.e. EMG, EEG, etc.
- Powerful DSPs. The SnR is equipped with advanced, powerful DSPs. All processing is done on the SnR itself, not on the PC.
- Open file format. Files are easily converted to other file formats, including .txt, .mat, .plx, .smr directly imported by the common off-line data analysis software.
- Experimental events log. User-defined events can be created within the software, allowing the researcher to mark the data file with a user-defined variable making offline analysis easier.
- Controllable digital filtering.The user can select the LP and HP for both spike and LFP recordings.
- Online sorting. The SnR allows 4 spike templates to be set per channel. 8-point template matching, a SSQ algorithm, and optional window discriminators are utilized to make spike sorting as easy and accurate as possible.
- Online statistics. Spike raster, firing rate, PSTH and evoked potential
- Video tracking synchronization. Alpha Omega has partnered with Noldus (Ethovisia*) to provide synchronization between the SnR and Noldus video tracking systems, making the SnR the ideal choice for labs with video tracking needs.
* Our software supports Ethovision V9.0 and 11.5
- Technical Specifications
Number of channels
16 - 128 (Several 128 channel systems can be cascaded)
Dynamic Input Range**
Hardware high pass filter (HPF)
0.075Hz OR 1Hz
Hardware low pass filter(LPF)
Maximum 44,000 Samples per Second for each channel
Input Referred Noise (RMS)
5µV @ 500 KΩ electrode
Measure, calculate and report for all electrodes
Physiological Signal Types
Spikes, LFP, EEG, EMG and other
Optional, supports up to 128 current sources
No. of channels
Up to 128 channels (can be split into two HeadStages)
2 stereo outputs
General purpose I/O pack
Optional - 16 analog inputs, 8 analog outpts, 4 digital
inputs, 1 digital input port (16 bits), 8 digital outputs
Up to 128 current sources
Stimulation Pulse Width
50 µSec - 1 mSec
Stimulation Pulse Amplitude
Biphasic - 2 µA – 7 mA (up to ±50V)
2 stereo outputs
Digital Port (16bit) + strobe and ready
1 expandable to 9
100 V – 240 V, 50Hz - 60Hz
Connection to PC
Standard 1 GB Ethernet
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- Software toolkit
Complete MATLAB Control & Data Access
All data can be cloned and streamed almost instantaneously to multiple computers. This gives users the ability to access data through a MATLAB or C++ toolkit and write custom algorithms. Additionally, commands can be sent back to the SnR from MATLAB or C++ to control the software, adjust parameters, and trigger stimulation, making the system ideal for closed-loop applications.
- Data streaming. All data collected by the system can be accessed online in MATLAB.
- Full system control. From within MATLAB, commands can be sent to adjust almost all system parameters or trigger unique stimulation paradigms.
- Closed-loop functionality. Data can be analyzed online, and results can directly trigger digital outputs or stimulation
- Easy programming. Specially designed MATLAB toolbox and instructions make accessing data in MATLAB simple and easy.
- Endless possibilities. Online access to data means each user can code paradigms specifically for their unique research goals. Examples (shown on right) include online statistics and automatic spike sorting algorithms.
Phase-specific microstimulation in brain-machine interface setting differentially modulates beta oscillations and affects behavior
Oren Peles, Uri Werner-Reiss, Hagai Bergman, Zvi Israel, Eilon Vaadia