# LED Indicator ### Indicator LED Meaning * PWR - Power has been applied * ERROR - Failure of GPS’s startup self test * 3DFix - GPS has acquired sufficient satellites to declare a 3D position fix * RTK - indicates that RTCM data has improved the fix to the RTK FLOAT or RTK FIX level --- # 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.holybro.com/gps-and-rtk-system/h-rtk-unicore-um982/led-indicator.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.