Overview
Some recording devices do not need or have a high sampling rate. As a consequence, they require a minimum pulse duration before an event marker can be detected.
By default, m-pod operates in “reflective” mode. For example, if StimTracker detects the length of an auditory stimulus as 10ms long, m-pod will produce a TTL pulse that has a 10ms duration. But you can change this behavior so that m-pod will enforce a minimum pulse duration no matter how short the actual signal duration is.
How to Set a Minimum Pulse Duration
The steps below assume that you are using an “m-pod for Parallel Port” that is connected to StimTracker, but will work for any m-pod model. The steps are similar for when m-pod is connected to an Riponda or Lumina 3G controller. Assuming that Xidon is already installed:
- On your Mac or Windows computer, launch Xidon.
- In Xidon, click on the Search for Device button. Once Xidon finds StimTracker (or response pad), it will display the correct model and the names of all the m-pods that are attached to it.
- Click on the Device menu → m-pod for Parallel Port → Output Mode….
- Click on the popup menu and select “Minimum Duration”.
- Set the desired minimum pulse duration.
When you click on OK, Xidon will save the change to flash memory so that it’s remembered even when m-pod is turned off.
Last Revision: Dec 23, 2022
