OmniPlex 1.11 Released and Plexon News

Plexon’s newsletter from January 29, 2014 discusses the release of a new OmniPlex system as well as Plexon’s record growth. 



January 29, 2014

A New Lab Turns to Plexon Every 3 Days!

What a year!  Welcome to the 120+ new laboratories from 18 countries that relied on Plexon’s equipment for the first time in 2013. We are delighted to be such a trusted partner to so many performing amazing and critical research around the globe. Welcome to the Plexon family, and thank you for the confidence you placed in us.

We eagerly await the next opportunity to serve and support these new customers, just as we do our valued, existing customers in the weeks, months and years to come. Just give us a call and let us know what we can do for you!

Early Registration for Workshop ends February 28

Workshop dates: March 17-20, 2014
The 2014 Plexon Neurophysiology and Behavior Workshop marks the fifth year of this amazing event when researchers from all over the globe descend on Dallas for three full days packed with instructions, demonstration and hands-on exercises presented by renowned researchers and Plexon subject matter experts. Each year, the event becomes stronger with last year earning a new high score of 9.4 out of 10.

Registration fees have remained flat for the third year in a row, AND this year there is an added discount if a registration is included on a quote for an OmniPlex®, CinePlex® or MAP System that is ordered by February 28, 2014.  Registration pricing is as follows:

  • $850.00: Early Registration with system purchase (see above)
  • $900.00: Early Registration (without a system purchase) until February 28, 2014
  • $1,100.00: Registration after March 1, 2014

The Workshop is limited to no more than 40 attendees to ensure maximum hands-on experience. Letters for Visa applications are available. For more information, email

OmniPlex 1.11 Released

OmniPlex users – stop what you are doing and download OmniPlex 1.11! This release is packed full of new features and performance enhancements including the significant addition of the new Spectral view, timed recording options, robust statistics, t-distribution expectation maximization (TDEM)  auto-sorting algorithm and faster processing among other improvements. Importantly, OmniPlex 1.11 now sets the default recording format to PL2.

A simple yet significant change in this new release is that the recording file format now defaults to Plexon’s game-changing PL2™ launched last year. The legacy PLX format is still supported; however, it is no longer the default. PL2 is supported by the latest versions of Offline Sorter™ (OFS), NeuroExplorer®, and Plexon’s MATLAB® and C/C++ file reading software development kits (SDKs) available online. It is important to make sure that the applications, scripts and other programs which are intended to be used to view and analyze recorded OmniPlex data support are updated to the new PL2-compatible format. If in doubt, contact

OmniPlex 1.11 now also offers a sophisticated, visually rich, new view: the Spectral view. It displays a rolling color-coded spectrogram of the currently selected field potential (FP) channel, plus an animated spectral graph below it. This allows researchers to monitor changes in spectral content, such as increase in energy in a range of frequencies, as a function of time.

The PlexControl program within the OmniPlex Software now provides options for using robust statistics in the determination auto-thresholding and sorting parameters. The primary advantage of robust statistics is that they are more resistant to the effect of outliers. Researchers will typically find that using robust statistics produces a more accurate estimate of the noise distribution, with the presence of spikes having less influence on the auto-thresholding process.

Previous releases of OmniPlex supported a single auto-sorting algorithm, known as valley seeking. Valley seeking is a non-parametric method based on local density measures, and gives very good results in many cases, but it is not always ideal. OmniPlex 1.11 supports an additional auto-sorting algorithm called t-distribution expectation maximization (TDEM). TDEM works on the assumption that the clusters in feature space (each cluster representing the spikes from one neuron