Here's what the PSE owner's manual says:
For NRG: Each side of the cam has two posts. Moving the
string from the post with the dot to the post without a dot on
the string side of the cam increases the draw length by
approximately 3/8". Moving the string from the post with the
dot to the post without a dot on the take-up side of the cam
decreases the draw length by approximately 1/8".
NRG
http://www.pse-archery.com/pdf_general/PSE%20User%27s%20Guide.pdfAnd here is a link to download an Owner's Manual.