522 DVR User Guide - click here
From the first page of Chapter 2, re: the "mode button":
![Frown :( :(](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
From the first page of Chapter 2, re: the "mode button":
Pretty much what we already knew...Mode - Indicates if the receiver is in Single or Dual mode. This feature is
reserved for future use and your receiver should always be in Dual mode.