Crystal Vision
Hardware installation
ARC-10MC User Manual R2.8
8
20/11/2009
2.2 Module configuration
There are no user re-configurable jumper links on the ARC-10MC. All jumper links
should be left in their factory set positions.
2.3 General Purpose Interface (GPI)
Each frame slot has up to six connections ‘a-f ‘for GPI control and monitoring. These
connections are available at the rear of the frame on the 26-way D-Type remote
connectors.
The first three GPIs are used to recall user-saved configurations. Initially or after a factory
reset these GPIs will call the preset aspect ratios until overwritten by a user stored
configuration.
GPI
Low (<1V)
High (+5V)
1
‘a’
Recall preset bit 1
}
See following table for user preset
control
2
‘b’
Recall preset bit 2
3
‘c’
Recall preset bit 3
4
‘d’
Not Used
No function assigned
5
‘e’
Video missing
Alarm asserted
No alarm
6
‘f’
Not Used
Pulling low will operate the relay bypass (RM43)
As supplied, each GPI output has a 270
Ω
resistor in series with its output. This allows for
an external LED to be driven connected to a DC voltage of +5V.
GPI
Bit 3
Bit 2
Bit 1
Initial Aspect ratio
Preset
1
0
0
0
Full screen 16:9 to 4:3
2
0
0
1
Full screen 4:3 to 16:9
3
0
1
0
Compromise 14:9 to 4:3
4
0
1
1
Compromise 4:3 to 14.9
5
1
0
0
Full image 16:9 to 4:3
6
1
0
1
Full image 4:3 to 16:9
7
1 1 0 Anamorphic
8
1 1 1 No
selection
