Grass Valley iTX System v.2.6 - Manual (Page 337)

Using iTX with a GPI device
Using iTX with a GPI device
An iTX system may use GPI (General Purpose Interface) devices for two types of process:
• iTX responds to GPI inputs generated by an external control panel. A GPI input triggers
an action, such as "take next", in the playout of schedule events.
• iTX generates GPI outputs to control broadcasting equipment; for example, an aspect
ratio converter. It does this when GPI output events are included in a schedule.
Supported GPI devices
iTX supports the specified GPI devices from the following manufacturers:
DNF Controls
USP-8; USP-8A; USP-EM-8; USP-SNMP-8; USP-16; USP-EM-16; USP-SNMP-16
Videoframe
VNode 8x8; VNode 16x16; VNode 32x32
OmniBus
Timecode Card GPI Device
The GPI Service
iTX can work with multiple GPI devices through a single service, called the GPI Service. This
service performs two roles:
• As a separate device driver for each GPI device, it sends commands to operate a
device or passes input signals from a device to iTX.
• As a data service, it transfers GPI data to and from the System Database; it sends this
information to any client (e.g. one displaying an iTX Desktop layout) that requests it.
When working with multiple GPI devices they can be configured to work independently, as
master/slave or as mirrored pairs.
To make the GPI Service available, you install the GPI Devices module. We recommend you
install the module on the Database Server machine.
March 2015 System Administrator Guide Page 337 of 404