9931-EMDE-OM (V1.17)
9931-EMDE PRODUCT MANUAL
3-51
Operating Instructions
9931-EMDE Function Menu 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
9931-EMDE Function Menu List — continued
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