Grass Valley NV9641A v.1.0 - Manual (Page 15)

5
NV9641A
User’s Guide
memory to be able to use the panel. It is up to the person configuring the panel to design a
simple and logical structure.
Some buttons functions are assigned by the system depending on the context. For example. if a
button page is to represent all sources in a category, and that list changes, the button subtree
adjusts in size dynamically. The panel software adds a “forward” button and a “back” button if
there are more sources than buttons. Pressing the ‘Forward’ button takes you to the next page
of sources. Pressing the ‘Back’ button takes you to the previous page of sources.
Some button states depend on context. Many buttons remain unlit when their functions are
disabled. For example, the up and down scroll buttons remain unlit until there is an opportunity
to scroll up or down, respectively. For example, an XY/MD button turns green for X-Y mode and
amber for multi-destination mode. ‘Save Preset’ goes low tally when you press ‘Clear Preset’.
The LCD buttons display a menu if the operator presses a menu button. When the operator
make a menu selection, viewable data are displayed on the LCD buttons. In some cases, the
operator can enter data (such as panel ID or LCD brightness) using buttons that allow data entry.
Configurers can define ‘Selection’ buttons that select a level during a breakaway setup or that
select destinations in multi-destination (MD) mode. (You must do so if the operator is to make
such selections.)
Up/Down Buttons
The two small buttons (next to the printed arrows) illuminate when scrolling is possible. The up
button illuminates when you can scroll up; the down button, when you can scroll down.
Scrolling is necessary when a list of items — for instance, source devices — exceeds the number
of buttons available for the items.
Operators will use the up/down buttons to view different button pages when the panel is
configured according to the paging model.
Tally Interface
At the rear of the panel is a DB25 connector that provides 8 tally inputs and 4 tally outputs. (The
outputs are solid state relay outputs.) Both inputs and outputs are optically isolated.
During configuration, you can construct Boolean logic that switches the outputs on. The terms
of the logic expressions are states of the source and destination devices, etc., controlled by the
NV9641A.
During configuration, you can prescribe NV9641A behavior that depends on the tally inputs.
What you connect to the tally interface is, of course, up to you. Grass Valley provides a breakout
cable (WC0053) for the tally connector as a purchase option.
The NV9000-SE Utilities on-line help documentation calls the tally interface a GPIO interface. On
the rear of the panel, it is labelled a “GPI interface.”
See Chapter 6, GPIO , on page 73, for complete detail.