Cobalt Digital FUSION 3G 9921-FS 3G_HD_SD Frame Sync - Manual (Page 103)

9921-FS-OM (V1.15) 9921-FS PRODUCT MANUAL 3-51
Operating Instructions
9921-FS Function Submenu List and Descriptions
GPIO Controls
Provides two independent GPI controls for GPI 1 and GPI
2 that invoke a user-defined card presets upon receiving a
contact closure/logic level on the corresponding GPI
input.
Also provides two independent contact pairs (GPO 1 and
GPO 2) that can be invoked by setting a GPO to be
enabled when a card preset is in turn applied.
Note: After familiarizing yourself with the GPI controls described here, see “Audio Routing with GPI Control Example” (p. 3-57)
for a comprehensive example using these controls for multi-source audio routing.
• GPI Status Displays Status displays for GPI 1 and GPI 2 indicate Open (and “unlit” indicator) for
GPI not present on GPI input. Display indicates Closed (and “lit” indicator)
when GPI is present.
Note: GPI trigger threshold/type is set using GPI Coding drop-down
described below. Refer to Specifications in Introduction, Chapter 1 for
GPI electrical specifications and limitations.
• GPI Preset Number Go-To Select Individual drop-downs (one for each of the four GPI states monitored by the
card) allow invoking a card preset when the corresponding GPI state is true.
• No Preset setting inhibits going to a preset if the state corresponding
to the drop-down becomes true. This setting is typically used to inhibit
GPI for an unused GPI.
• 1 thru 64 setting allows any of 64 user-defined presets to be invoked
when the state corresponding to the drop-down becomes true.
Note: • No Preset setting should be considered and used for any logic state
that is not specifically to be used for a valid GPI state.
• GPI go-to number settings are independent of saved presets and
cannot be defined under a preset.
• Make certain presets toggled by GPI call identical card settings
except for what is expressly to be changed by the toggle. In addition
to invoking undesired operation, unintentionally different settings
called in presets may invoke states that result in longer engagement
times (e.g., even if a Dolby
® encoder is not used on either toggled
GPI preset invocation, undesired setup such as enabling an encoder
from disabled to enabled may cause longer engagement time
overall. Make sure such functions are similarly set for both preset
toggles whenever possible unless required).
• GPO Enable Enables GPO 1 and/or GPO 2.
GPO is designed to be used in association with a card preset. If GPO is set
to be closed, and this setting is saved along with other items to a particular
preset, whenever the preset is invoked the GPO will also be invoked.
Example: Assume GPO 1 is set Closed, with this setting saved with others
in Preset 6. With Preset 6 invoked, GPO 1 will now go to closed.
If Preset 6, using Event Based Loading, is set to be invoked
whenever SD is received, in turn whenever SD is received GPO 1
will also be invoked. As such in this example, GPO 1 would serve
as a GPO that indicates when SD is being received.
Table 3-2 9921-FS Function Submenu List — continued
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