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GPI Control
General Purpose Interface (GPI) is a high/low voltage
signalling protocol that allows the switcher to send
simple commands to an external device, or receive
commands from a device. Each pin on the GPI is set
as either high (+5 Volts), or low (0 Volts), and it is the
switching between high and low that sends commands
to the external device, or to the switcher.
GPI Trigger Types
There are four trigger types supported by the switcher.
These can be either output triggers, or input triggers.
Table 5: Trigger Types
Trigger Description
Low
Edge
The output level is set
high, and momentarily
goes low for the trigger.
High
Edge
The output level is set
low, and momentarily
goes high for the trigger.
Low
Level
The output level toggles
from the base high level
to the low level. The
output signal remains
at this level until reset.
High
Level
The output toggles
from the base low level
to the high level. The
output signal remains
at this level until reset.
GPI Setup
Each GPI pin on the switcher can be configured as
either an input, or an output. By default, all GPIs are
set as inputs.
To Set Up a GPI Input
The switcher requires a Low Edge GPI input trigger.
1. Click Navigation Menu > Configuration >
GPIO .
The page lists all the GPIs on the switcher and
how they are currently configured.
2. Click Edit for the GPI that you want to configure
as an input.
3. Click GPI .
4. Click an Event button to select the action you
want to assign to the selected GPI input pin.
•
--none-- — no action is taken
• CC
— run a specific custom control
• enter the custom control bank in the Bank
field
• enter the custom control in the
CC field
•
Mem Recall — recall a memory on all MEs
(enter the memory to recall in the Mem field)
• FtB — perform a transition to black on the
program ME that also takes all keys off-air.
The source originally selected on program is
selected on preset
•
ME Cut — perform a background cut on the
selected ME (click an ME button to select the
ME, or MiniME
™
)
• ME Auto — perform a background auto
transition on the selected ME (click an
ME
button to select the ME, or MiniME ™ )
• Key Cut — perform a key cut on the selected
ME and Key
• click an
ME button to select the ME, or
MiniME ™
• click a
Key button to select the keyer
• Key Auto — perform a key auto transition on
the selected ME, or MiniME
™
and Key
• click an
ME button to select the ME, or
MiniME ™
• click a
Key to select the keyer number
• Aux Xpt
— select a video source on an aux
bus
• click the
Aux button and select the aux bus
• click the
Source button and select the
video source
To Set Up a GPI Output
A GPI output can be set as a Normal GPI output, or as
a Tally output. As a tally output, the GPI output must
be assigned to a video source. A GPI output in tally
mode can still be used as a normal GPI output.
1. Click Navigation Menu > Configuration >
GPIO .
The page lists all the GPIs on the switcher and
how they are currently configured.
2.
Click Edit for the GPI that you want to configure
as an output.
3.
Click GPO .
Carbonite Black UltraChrome User Manual (v1.0) — GPI Control • 35