---
title: "Known issues for Vicon systems"
canonical: "https://help.vicon.com/space/Connect/1618465/Known%20issues%20for%20Vicon%20systems"
format: markdown
---
> Macro (scroll-tablelayout)

| **Issue** | **Workaround** |
| --- | --- |
| If you define a repeating GPO signal to have a pulse period of 1 and a pulse width of 0.5 seconds, and set the system frame rate to 240 fps, the signal from the sync output of a Lock Lab is actually 1.0042 Hz, rather than 1 Hz. | In the referenced GPO, set the frame period to be 241. |