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.

4-60

Chapter 4: Built-In Images

Model 801GC, 801GF & 801GX¥Rev. X1

Page 98
Image 98
Quantum Data 801GC, 801GF, 801GX manual Smpte contd