‍If you are using Net Station 4.x, please see this older support note.

‍Hardware Setup (Important)

‍Make sure that your m-pod firmware and StimTracker firmware are using version 2.2.7 or later. You can check the firmware version and update it if necessary using our free Xidon software.

‍There are two versions of m-pod for EGI, revisions A and B:

‍If using revision A:

• m-pod should be set to negative logic; see this page on how to do it, and see this blog post, An Important Update for EGI Users, as to why.
• We recommend avoiding reflective mode. Set m-pod to single pulse mode to mark onset of events, or double pulse mode to mark onset and offset of events. Set pulse duration to 2 or 1ms.
• You must use StimTracker with a battery pack; see this blog post for a recommended model.

‍When using revision B:

• The signals are optically isolated; m-pod should be set to positive logic.
• We recommend avoiding reflective mode. Set m-pod to single pulse mode to mark onset of events, or double pulse mode to mark onset and offset of events. Set pulse duration to 2 or 1ms.
• A battery pack is not needed.

‍Summary

‍m-pod for EGI is fitted with a DB9 connector. It is ready to plug into the GES 200 and GES 250, using the Net Amps 200. On the GES 300 and later systems, an additional “Hypertronics-to-DB9” cable is needed. EGI installations typically have this cable already, but if your does not, you can buy one from EGI or Cedrus’ store.

‍Setting Up Net Station

‍Net Station 5 can only record the onset of a signal; it cannot record the offset. For example, when using a light sensor, Net Station 5 can record when a stimulus has appeared on the screen but not when it gets masked (erased).

‍Setting up Net Station 5 to work with m-pod is straightforward. Make sure that the setting “DINs 1-8” on the right side is set to “8 DINs”. In the screenshot below, in the upper part of the window, you can see event markers (DINs) being received periodically.

‍Default Output Signals

‍The trigger value is as seen in the Net Station software.

‍When Connected to a Riponda or RB-x40 Response Pad

‍When Connected to StimTracker

‍Customizing The Output Signals

‍m-pod contains a powerful microprocessor that can reassign any input signal to any output line, and without any significant delay. It can also assign multiple signals to the same output line.

‍The tables above describe the factory default. If your experiment or lab setup requires different output, Cedrus provides a free utility for configuring your m-pod. After you use it, your configuration is saved to flash memory so that it’s remembered even after you power off m-pod.

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Last Revision: Jun 24, 2025