6. Menu Control Buttons
These three buttons labeled "<", ">", and "SEL" (SELECT) are
used to control the menu/setup functions displayed on the
LCD. To enter a menu mode, you can press any one of these
buttons. This will bring up the main menu.
All of the SP1 set-up and calibration operations are done using
these buttons and the LCD screen.
Navigating any menu or sub-menu is done using the two
arrow (< >) buttons. Once the desired submenu or function
is highlighted, pressing "SELECT" will make it the current
menu or function.
To exit a menu, or back up a step use the arrow buttons (< >)
to highlight the 'X' displayed in the lower right hand corner
of the LCD window and press "SELECT".
7. Source Selection Buttons and Indicators
Pressing any one of these buttons will instantly switch the
SP1's analog and digital inputs to read the indicated source.
If the SP1 is in its digital mode, as soon as any input is
selected and switched, the decoder will automatically try to
determine the new bitstream's type and mode
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