Analysis ToolPak

With respect to the Analysis ToolPak for use to perform the t-Test, if the option for "t-Test: Two-Sample Assuming Unequal Variances" is selected,

is the Satterthwaite Approximation used and not the pooled standard error?  Refer to the following URL:  

https://support.microsoft.com/en-us/office/use-the-analysis-toolpak-to-perform-complex-data-analysis-6c67ccf0-f4a9-487c-8dec-bdb5a2cefab6

Please advise or provide feedback.