# Probe Pane

This page provides information on the Probe pane, which can be accessed under the *Tools* tab or by clicking on the [![Toolbar Probe 30.png](https://v30.wiki.optitrack.com/images/f/f7/Toolbar_Probe_30.png)](https://v30.wiki.optitrack.com/index.php?title=File:Toolbar_Probe_30.png) icon from the toolbar.

## Overview

This section highlights what's in the Probe pane. For detailed instructions on how to use the Probe pane to collect measurement samples, read through [Measurement Probe Kit Guide](/v2.3/motive/measurement-probe-kit-guide.md).

#### **Probe Calibration**

The *Probe Calibration* feature under the Rigid Body edit options can be used to re-calibrate a pivot point of a measurement probe or a custom Rigid Body. This step is also completed as one of the calibration steps when first creating a measurement probe, but you can re-calibrate it under the *Modify tab*.

#### **Steps**

1. In Motive, select the Rigid Body or a measurement probe.
2. Bring out the probe into the tracking volume where all of its markers are well-tracked.
3. Place and fit the tip of the probe in one of the slots on the provided calibration block.
4. Click *Start*
5. Once it starts collecting the samples, slowly move the probe in a circular pattern while keeping the tip fitted in the slot; making a cone shape overall. Gently rotate the probe to collect additional samples.
6. When sufficient samples are collected, the mean error of the calibrated pivot point will be displayed.
7. Click *Apply* to use the calibrated definition or click *Cancel* to calibrate again.

#### **Digitized Points**

The Digitized Points section is used for collecting sample coordinates using the probe. You can select which Rigid Body to use from the drop-down menu and set the number of frames used to collect the sample. Clicking on the *Sample* button will trigger Motive to collect a sample point and save it into the `C:\Users\[Current User]\Documents\OptiTrack\measurements.csv` file.

When needed, export the measurements of the accumulated digitized points into a separate CSV file, and/or clear the existing samples to start a new set of measurements

#### **Live Position**

Shows the live X/Y/Z position of the calibrated probe tip.

#### **Last Point**

Shows the live X/Y/Z position of the last sampled point.

#### **Live Distance**

Shows the distance between the last point and the live position of the probe tip.

#### **Distance**

Shows the distance between the last two collected samples.

#### **Angle**

Shows the angle between the last three collected samples

![Probe pane showing the measurements.](/files/BZp64nzwlqhrm7swaJxg)


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.optitrack.com/v2.3/motive-ui-panes/probe-pane.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.