Quantum-data 801GC Manual do Utilizador descarregar pdf (Página 98)

100

101

4-60 Chapter 4: Built-In Images

Model 801GC, 801GF & 801GX¥Rev. X1

SMPTE — contd.

Test Video amplifier stability

Method The two black-and-white windows should show

sharp transitions between the smaller box and the

surrounding window. Streaking may be an

indication of undershoot or overshoot while ghost

images may indicate a ringing problem.

Test Excessive overscan and off-center alignment

Method The entire border should be clearly visible on the

face of the tube and not be hidden by the edge of

the glass or by any bezel.

Test Interlace flicker

Method The horizontal 1 On - 1 Off stripes in the resolution

boxes should not have objectionable flicker when

shown with an interlaced format. Excessive flicker

indicates that the combination of the display’s CRT

persistence and frame scan rate is below the

persistence time of the human eye.

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