OmniPlex Neural Recording Data Acquisition System
OmniPlex® Neural Recording Data Acquisition System is Plexon’s flagship electrophysiology (a.k.a. ephys) research system. This system combines front-end amplification and acquisition with intuitive and powerful control and visualization software.
**OmniPlex Release 18 now available. Learn More about OmniPlex Release 18**
The OmniPlex 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 System is a combination of the OmniPlex chassis, OmniPlex Software, and for new OmniPlex systems purchased today, a Digital Headstage Processor (DHP) subsystem – all described below. Other versions of the OmniPlex system could utilize an OmniAmp or DigiAmp A/D device.
- 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 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 adaptive power line noise filter) and cutoff frequencies, for extracting spikes and field potentials from the wide-band signal and for noise removal.
- The DHP and the DigiAmp digitizing amplifier are both electrically isolated.
Sorted spike and continuous data acquired by the OmniPlex 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 System from spike detection 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 could best support your ephys research goals.
OmniPlex System Features
Selected technical specifications for the OmniPlex System are provided below. A Plexon Sales Engineer is happy to discuss your needs and how the OmniPlex could best support your neural recording and ephys research goals.
|Features||Specifications and Options||Remarks|
– 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
|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
– Common Median Referencing
|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|
– PlexNet (TCP/IP or UDP), and
– NeuroExplorer® online link
|Chassis dimensions||5.25 inches high, 19 inch rack|
Includes features up to Release 17
Post date April 17, 2017
- OmniPlex Release 18 (Version 220.127.116.11) – Windows 7 Post date December, 2018
- OmniPlex Change Log Post date December, 2018
Guides and How To Papers
- OmniPlex Digital Input Guide Please see Chapter 9 of the OmniPlex User Guide for information about the Digital Input card
- Integrating OmniPlex and CinePlex V3
- OmniPlex 64 channel to 128 channel upgrade procedure
Analog version only
Technical Specs and Data Sheets
Analog version only
- OmniPlex Version 1.17.0 Demo Post date March 2018