www.aja.com
51
FS4 Frame Synchronizer/Converter v1.1
2.1–4 GPI IN 1–4
Response
The setting of this parameter determines what happens when a GPI trigger is received at
the FS4’s
GPI
Inputs (1–4). A GPI Trigger is defined as a TTL low voltage level (0 to 0.8V
with respect to its isolated ground pin). The GPI interface pinout and specifications are
discussed in
. Input video sources selected by GPI trigger remain
selected until the trigger is released.
In Four Channel Mode, each FS4 Video Processor can be programmed to perform an
action on each of the four GPI Inputs. This means the same GPI input trigger could cause
different actions on each channel. In Single Channel Mode, each GPI input can only
trigger one action on that Video Processor.
Caution!
GPI Inputs can be used to trigger Presets. When you recall a Preset Configuration, the
recalled preset immediately replaces the system’s existing configuration. All previous
settings are lost unless you have previously stored them in another preset
configuration or an exported file.
Caution!
In Four Channel Mode, each Preset saves all the settings for all four channels. Storing
and recalling a Preset will affect all the settings for all four channels in that mode. Care
must be taken to establish a policy for the use of FS4 Presets, especially if the FS4 is
operated in Four Channel mode and the different channels have different users.
