Grass Valley NV9649 v.1.1 - Manual (Page 18)

6
Introduction
Tally Interface
• Destination.
The ‘Destination’ field shows the currently selected destination.
• Information.
Under normal operating conditions, the ‘Information’ field displays the level (or levels) that
will be changed in the next take. The field displays either “All Level” or the name of a selected
level.
When the panel is operating under the NV9609 or LCD XY/MD model, the ‘Status’, ‘Preset’, and
‘Destination’ fields can show either alternate device names (from a name set) or system
mnemonics depending on (1) the state of the ‘Name Set Toggle’ button (if the panel has one),
(2) the default name set (3) the existence of name sets in the NV9000 configuration. (An alias is a
name defined in a name set.) The panel does not use name sets under the server model.
Flags
When a destination is in breakaway, the ‘Status’ field indicates the breakaway with an asterisk in
its eighth character position.
 This does not occur when the panel is in ‘Panel Server’ mode.
 The asterisk will obscure the last character of the source name if the name has 8 characters.
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 or off. The
terms of the logic expressions are states of the source and destination devices, etc., controlled
by the NV9000 control system.
During configuration, you can prescribe NV9649 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 labeled a “GPI interface.”
See chapter 6, GPIO , on page 75, for complete detail.
Modes of Operation
The NV9649 has 3 operating modes (or behavioral models). The panel’s 28 buttons and 4
displays are used in very different ways in the 3 modes.
‘Panel Server’ Mode
When the panel is in “server” mode, it operates in conjunction with a number of NV9648s. The
NV9649 is the “server” and the NV9648s are the “clients.” The NV9649 and the NV9648s combine
to form, in essence, a larger panel
— actually a cluster of many small control units. The NV9649,
being the server, can change which sources and destinations the NV9648s can use.