OmniPlex D Neural Data Acquisition System

The OmniPlex® D Neural Data Acquisition System is Plexon’s flagship electrophysiology research system. The combination of superior front-end amplification, intuitive control software, and game-changing PL2™ neural data file format make the OmniPlex D System the most advanced neural data acquisition and online spike sorting system on the market today.

 **OmniPlex Release 16.1 (Version 1.16.1.1) now available. Learn More about OmniPlex Release 16**

The OmniPlex D System is a compact, flexible platform for high performance data acquisition and powerful online spike sorting.  It offers low latency, superior common-mode rejection amplification and is well known for its user-friendliness.  The OmniPlex D System is a combination of the OmniPlex chassis, OmniPlex Software version 1.7 or higher and a Digital Headstage Processor (DHP) subsystem – all described below.

  • The compact OmniPlex chassis houses cards for synchronization and timing between system components, acquisition subsystem links, digital inputs for 64 channels and 32 auxiliary analog inputs for non-neural experiment signals.
  • The OmniPlex System Controller operates the OmniPlex Software consisting of OmniPlex Server, the “software engine” for neural signal processing, and PlexControl, which is the main user interface providing data visualization and the user interface for interacting with the system.
  • The Digital Headstage Processor (DHP) for use with digital headstages is Plexon’s most advanced subsystem. The DHP now enables up to 512 channels of neural recording, decreased sensitivity to ambient electrical noise, and lighter headstage cables with fewer wires for greater freedom of animal movement. Further, it offers real-time upsampling to 40KHz and adjustment of multiplexer timing offsets (equivalent to simultaneous sampling) for improved sorting quality, trodal acquisition and software referencing  – unlike other digital headstage based systems.Alternatively, the predecessor to the DHP is Plexon’s DigiAmp™ subsystem for analog headstages. The electrically isolated DigiAmp Digitizing Amplifier is available in two sizes: the MiniDigi™ for 16, 32, 48 and 64 channels, and the DigiAmp for 64, 128, 192 and 256 channels. This subsystem is recommended when using analog headstages.Both provide 16-bit A/D conversion at 40kHz per channel for acquisition of the complete wide-band signal. Flexible digital filtering supports a wide variety of filter types (Bessel, Butterworth, Elliptic, 2-12 poles, plus notch filter) and cutoff frequencies, for extracting spikes and field potentials from the wide-band signal and for noise removal.

Sorted spike and continuous data acquired by the OmniPlex D System is available to external clients (developed through the C/C++ or MATLAB® software development kits (SDKs) as soon as 1-2 milliseconds after acquisition. This figure is the actual end-to-end latency through the entire OmniPlex D System from hardware input to hardware output, including an online user client program.

The DigiAmps and all modules in the chassis are synchronized via a high-resolution master timing module.  The same master timing module can be extended to synchronize timestamps with compatible equipment such as Plexon’s CinePlex® Behavioral Research System.

A Plexon Sales Engineer is happy to discuss your needs and how the OmniPlex D could best support your research goals.

OmniPlex D System Features

Selected technical specifications for the OmniPlex D System are provided below.  A Plexon Sales Engineer is happy to discuss your needs and how the OmniPlex D could best support your research goals.

Features Specifications and Options
Remarks
Subsystems
– Digital Headstage Processor (DHP) subsystem
– DigiAmp™ Digitizing Amplifier subsystem
– DHP subsystem required for use with digital headstatges
– DigiAmp subsystem required for use with analog headstages
A/D input conversion 40kHz per neural channel at 16-bit resolution – Simultaneous sampling
– Continuous wide-band recording
on all neural channels
Timestamping
25µsec (40kHz)
Filtering – Software selectable digital filtering
– 2-12 pole filters, Butterworth,
Bessel or Elliptic; notch filter
For isolation of field potential and spike frequency bands
Referencing Digital selected channel referencing including:
– Common Average Referencing
(CAR) and
– Common Median Referencing
(CMR)
For online noise and artifact removal
Digital Inputs up to 64 channels Up to four 16 channel ports, individual TTL and/or strobed word data
Auxiliary non-neural A/D inputs 32 channels 16 bit A/D conversion for auxiliary non-neural signals, 250kHz max rate (with “fast” card)
Trodal sorting support Stereotrode and tetrode
Channel mapping
User-definable mapping sets
Spike sorting Automatic online in waveform space or directly in 2D/3D feature    space – Waveform space includes
time/voltage using boxes,
templates, lines or bands
– Feature space includes PCA,
peak/valley and more
– Powerful graphical tools for
manually defining and adjusting
sorting parameters online
File type recorded
Plexon .PL2 and .PLX files Utility provides conversion between formats
Compatibility – Plexon MATLAB®/C++ online and
offline SDKs
– PlexNet (TCP/IP or UDP), and
– NeuroExplorer® online link
Chassis dimensions 5.25 inches high, 19 inch rack

Subsystem Features

Features DHP Subsystem DigiAmp subsystem
Channels Up to 512 neural input channels Up to 256 neural input channels
Acquisition processor Digital Headstage Processor (DHP) – MiniDigi (16 to 64 channels)
– DigiAmp (64 to 256 channels)
Headstage compatibility
16 and 32 channel Plexon digital headstages 8, 16, 32 and 96 channel Plexon analog headstages including biopotential headstages
Electrode testing
Internal electrode impedance measurement External impedance measuring instrument
Controller platform Windows® 7 Windows® 7
Suggested application
Neural recording with digital headstages Neural recording with analog headstages and/or when using biopotential headstages

Manuals/User Guides

               Includes features up to version 1.15

               Post date April 17, 2017

Installation Packages/Upgrades

               Post date February 2, 2017

Change Log

               Post date February 2, 2017

Guides and How To Papers

               Analog version only

Technical Specs and Data Sheets

               Analog version only

Demos

               Post date March 14, 2017