But a site survey should be more than just a collection of passive data - just the first step in defining what it looks like to be a great result. We use the Discs standard to verify the size and position of the image relative to the viewing distance (approximate and distant) and angles (horizontal and vertical). We use the ISCR and PISCR standards to define image quality according to the given contrast ratios. We also use other AV standards, environmental standards and global best training standards.
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