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26
ACO6800
+
Installation and Operation Manual
Copyright © 2009, Harris Corporation
Chapter 3: Configuration and Operation
Switching to a Still Image (ACO6800
+
ISCST Modules Only)
In ACO6800
+
ISCST modules, the
Still Image Source
parameter determines
whether the output is to TSG or trouble slide.
When the
Still Image Mode
parameter is set to
Force
, the output is to a
pre-defined still image, except when relay bypass is enabled.
When the
Still Image Mode
parameter is set to
Auto
, the still image is treated
as the module’s third input, which is always in good quality. The switching
mechanism includes the still image in its priority list. The order of priority, from
highest to lowest, is IN 1, IN 2, and still image.
shows the relationship between switch mechanism and still image
output when the
Still Image Mode
parameter is set to
Auto
.
A1 SDI Expected Standard
525
A2 SDI Video Standard Mismatch: Priority
6
A2 SDI Expected Standard
525
Table 3-8. Sample Scenario Two: Chain of Events
Event
Result
1. At the start, A1 and A2 are both
present and 625 format.
Output A is A1 (A1 Standard Mismatch alarm is
on, but has not met switching condition, level 6).
2. A1 is lost.
Output A is A1 (A1 and A2 inputs are bad, but A2
Standard Mismatch alarm level is 6, so the
ACO6800
+
selects primary input as output).
3. A user sets the Manual Switch to
A2.
Output A is A1 (A2 is still bad, and Alarm has
higher priority than Manual).
4. A user activates GPI Input 2.
Output A is A2 (GPI Input has higher priority than
Alarm).
5. A user deactivates GPI Input 2.
Output A is A1.
6. A1 is present, 625 format.
Output A is A1 (Alarm is still on, but it has not
met switching condition).
Table 3-7. Sample Scenario Two: Parameter Settings (Continued)
Parameter
Setting
Table 3-9. Still Image Priority and Image Output When Still Image Mode is set to Auto
Switch High
Priority
Switch Medium
Priority
Switch Low
Priority
Output
Source
Note
GPI Input Select
IN1
N/A
N/A
Input 1
GPI forces IN 1 as output
source even when IN1 is
lost.
GPI Input =
Inactive
Manual Switch =
IN_2
N/A
Input 2
Manual switch forces IN 2
as output source, even
when IN 2 is lost.
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