Barco DX-700 - Manual (Page 27)

DX-700 • User’s Guide • Rev 02 27
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About the DX-700
• For input modules in the first bank, expansion link cables from the Expansion Out
DVI ports are connected to the second bank’s DVI inputs.
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An additional benefit of both cross-bank and external stacking is that a system
configuration requiring vertical output stacking (in a single bank) can be built without
incurring video delay.
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Consider a configuration that uses two outputs within a bank, each driving a
wall section, and the two wall sections comprise the overall image. If the two
sections are oriented horizontally, there is no additional delay. If the two
sections are vertically oriented, extra delay is added. Here, moving to either
a cross-bank or external stacking configuration may alleviate the extra delay.
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When multiple DX-700 units (or multiple DX-700 banks) are linked to create a final output
image that’s larger than is possible using only one unit, all DX-700 units must process each
input identically. This guarantees that there are no discontinuities in color balance, sample
phase and other parameters at boundaries between each DX-700 output image.
To satisfy this requirement, the input module in the first DX-700 unit (or bank) receives the
original video source and processes it in preparation for scaling. The video stream is then
digitally transmitted via the input module’s Expansion Port to the remaining DX-700 units
(or banks) — exactly as presented to the first module’s scaler.
Please note:
• The input module’s dedicated Expansion Output is a standard dual-link DVI-I
connector.
• The input module’s DVI Input port doubles as the Expansion Input, using a
standard dual-link DVI-I connector.
• Dual-link DVI-I cables (customer-supplied) are required for these connections.
Contact your Barco sales representative for details.
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The DX-700 utilizes scalers on each input module and on the System module. Each scaler
uses a triple-buffered frame memory to minimize motion artifacts such as frame tearing due
to asynchronous frame rates.
• On the input module, the scaler output provides a maximum horizontal active size
of 2048 pixels and a maximum vertical active size of 2048 lines.
~ The maximum input to the scaler cannot exceed 2048 x 1536 pixels.
~ The scaler’s output cannot exceed the DX-700’s overall canvas size of
2048 x 1080 (or 1080 x 2048) pixels.
• On the System module, the scaler receives the image on the canvas. For
monitoring purposes, this scaler enables you to size the output to the resolution of
your selected monitor (DVI or analog). You can monitor individual LED outputs,
groups or the full canvas. Video from output modules is not affected.
Note Use Director Toolset to set up cross-bank stacking.