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11.14 TECHNICAL NOTES, CONTINUED
11.14.1
Hardware Mapping, Continued
d. Alarm Inputs
e. Control Outputs
11.14.2
Vertical Interval Switching
The reference input for vertical interval timing is physical input 1 (this is a hardware
function and is not user changeable).
11.14.3
Black Pause Switching
Black pause switching is activated on the MX208 module by the fitting of a jumper
across the black pause header pins (PB) located adjacent to pin 6 of the 48-way
communications header. This enables the functionality for all 8 channels.
The MX208 performs clamp to black as a secondary function to text insertion. Where
multiple switching and text commands are processed simultaneously (as would be the
case with synchronized scanning on multiple monitors) the effectiveness of clamp to
black in hiding visible frame roll may be reduced.
11.14.4
PAL/NTSC Determination
MX-208 cards perform automatic PAL/NTSC standard determination in order to
accurately synchronize screen text updates. Each MX-208 acts independently and
utilizes source video from its channel 1 as the reference for determination.
Rev. C
Alarm
Input
1 – 8
9 – 16
17 – 24
Output
Number
1 – 8
11-10
Slot
(ASL field in SETMAX)
15
16
17
Slot
(OSL field in SETMAX)
1
HMXMU001018
10/06
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