Noldus Knowledge Base

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Knowledge Base articles - EthoVision XT


Connecting an optogenetics laser to be controlled by EthoVision XT

EthoVision XT can be used to control a laser or LED for Optogenetics, triggering the light based on time or on the animal’s activity. For example, the laser may be turned on when the animal enters a given zone.


How many GigE cameras can I use on a laptop with EthoVision XT?

EthoVision XT 12, 13, and 14 support one Basler GigE camera for recordings up to 10 hours duration on a suitable laptop. For EthoVision XT 15, we support a Basler USB 3.0 camera instead.


Redo a trial in EthoVision XT

Use the Redo a trial option in EthoVision to retrack a trial from video if the detection settings or arena settings were incorrect.


Basler camera is not detected by EthoVision

This issue involves a situation where you are attempting to use your Basler camera(s) in EthoVision and get a warning message that “Camera not found”.


EthoVision XT is unable to detect the Noldus I/O Box

This error indicates there was a problem connecting to the Noldus I/O box (large or mini version) with the EthoVision XT software.


My color Basler camera is monochrome in EthoVision XT

This issue involves a situation where the image from your Basler camera is color in the Pylon Viewer, but monochrome/black and white in EthoVision XT.


How do IR cameras work?

Infrared cameras see infrared (IR) light, but otherwise operate just as normal, visible light cameras.


EthoVision will not install and the resulting Log file says Access Denied 0x80070005

This issue involves a situation where the installation of EthoVision XT on your PC fails and the resulting log file says “Error 0x80070005”


Picking the right sample rate in EthoVision XT

The sample rate specifies how many data points EthoVision will collect per second in your experiment. You should pick a rate appropriate for your animal and your experimental methods.


Why are my trials ending at an exact time (e.g., 10 minutes) even though my Trial Control Settings are set for longer?

This issue involves a situation where your trials are stopping after a fixed time (e.g., 10 minutes) even though your Trial Control Settings are longer (e.g., 20 minutes).