1253 B&K Precision, 1253 Datasheet - Page 33

• Manufacturer Part Number: 1253
• Description: GENERATOR HANDHELD HDTV PATTERN
• Manufacturer: B&K Precision
• Type: NTSC Handheldr

Specifications of 1253

• Patterns: ANSI, Bar, Checker, Crosshatch, Focus, Multiburst, Needle, PLUGE, Raster, Staircase, Window
• Connection Method: BNC, S-Video
• Power Source: 9V Battery
• Equipment Type: NTSC Color Generator
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

7. Sharpness/Detail Enhancement Calibration
If the display includes Sharpness or Detail Enhancement controls they should be calibrated to maximize apparent
picture resolution, but avoid any excessive edge-enhancement that creates outlining artifacts.
BK-1253 Sharpness/Detail Enhancement Calibration Patterns:
Sharpness/Detail Enhancement Adjustment Procedure:
Initially adjust Sharpness or Detail Enhancement controls such that each of the black and white line bursts (except
the last burst) in Multiburst pattern appear to have the same black/white contrast ratio.
If the sharpness or detail enhancement control is set to an excessively high level to increase the contrast of the
final burst, it is likely to exaggerate the contrast of the mid-frequency bursts and create outlining artifacts on edges
of lines or objects. So do not increase the controls to the point that the mid-frequency bursts start to appear brighter
than the low frequency bursts, regardless of the appearance of the final burst.
Using the Focus Pattern, ensure "BK" is sharply readable across the entire screen, without outlining artifacts.
After the initial adjustment of the Sharpness or Detail Enhancement controls, use the Sharpness pattern to look for
edge outlining artifacts. Look for ghost-like line images on either side of the lines. They may appear as brighter or
darker halo lines, or both. Reduce the Sharpness or Detail Enhancement control from its initial settings until any
edge-outlining artifacts disappear. If edge outlining can not be reduced with Sharpness or Detail Enhancement
controls, it may reveal problems with poorly terminated cables, particularly when long cables are connected to the
display. If outlining artifacts are present without Sharpness or Detail Enhancement controls, and cables are not at
fault, it is possible that the display has Scan Velocity Modulation (SVM), or other non-adjustable enhancement
circuits that will be detrimental to picture quality.