# Testing Tuners Using Files If you need to test with a system that you that you don't have access to, for example, testing ATSC functionality on a DVB system, you can use a TS recording to emulate the tuner type. ``` ./tvheadend --tsfile_tuners 1 --tsfile test.ts ``` The TS file should contain the whole mux and not just one service. A new 'network' will be created for the file as well as a number of 'mux', 'service' and 'channel' objects matching the services found within the TS file. The contents of the TS file will be played on a continuous loop. See the instructions for creating [Mux Dump Files](/documentation/creating-a-mux-dump.md) for more information. --- # 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.tvheadend.org/documentation/development/testing-tuners-using-files.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.