# Questions & Troubleshooting ## The unit is unable to obtain GNSS time synchronization which prevents the system from collecting data. For single GPS antenna setups, please make sure that the external GPS antenna is connected to the ANT1 port on the front-panel of the SCOUT NavBox. Connecting the antenna to the ANT2 port will result in the unit not synchronizing GNSS time. --- # 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.phoenixlidar.com/hardware-and-interfaces/navbox/scout/questions-and-troubleshooting.md?ask= ``` 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.