Product specifications

121
Connecting GPIs
Avid DNG systems support a general-purpose interface (GPI). Special
video effects and character generation can be triggered with GPIs. The
Avid system interprets the GPI trigger directive, which tells the system
when to trigger an external source. A V-LAN VLXi (GPI) or Avid GPI
controller is required to use this interface.
The GPI can control the Stop, Standby, Play, Record, Recue, Skip, and
Tally functions. The input signals for these functions are IN1 to IN8
and cannot be reassigned (see Table 7-1). IN7 and IN8 are not used.
These eight inputs provide 16 output signals that are user assignable.
For information on entering GPI triggers, see the userÕs guide for the
system.
Figure 7-6 Avid GPI Connections
Y
Y
R-Y
R-Y
B-Y
B-Y
Composite
Composite
UI Monitor Keyboard Remote GPI
Time Code In
Serial
Ports
1
2
4
3
Output
Input
Analog
Ref In
Avid Media Processor
Avid GPI
GPI control cable
To GPI port
To either Apple Desktop Bus (ADB) port
Customer-supplied 50-pin parallel port
cable to external devices
(see Table 7-1 for pin assignments)