What is the default character encoding used by Splunk during the input phase?

https://docs.splunk.com/Documentation/Splunk/7.3.1/Data/Configurecharactersetencoding

" Configure character set encoding. Splunk software attempts to apply UTF-8 encoding to your scources by default. If a source foesn ' t use UTF-8 encoding or is a non-ASCII file, Splunk software tries to convert data from the source to UTF-8 encoding unless you specify a character set to use by setting the CHARSET key in the props.conf file. "