Tektronix 1710J Series, Instruction Manual

Page: 63 / 252

Reference
1710J-Series Waveform Monitors
3–7
The active video time is where the picture is carried. Here, too, you can tell quite
a lot with just a waveform monitor. The video appears between the horizontal
blanking intervals. Change or adjust the video signal and you will see a change
in this signal. Select the the 1710J-Series Waveform Monitor LOWPASS filter
mode to eliminate the chroma signal and show only the luminance, or brightness
signal.
Creativity is allowed here, but the picture signal should use most of the area
between the 7.5 IRE (maximum black for NTSC) dotted line (0.3 maximum
black for PAL) and the line at 100 IRE or 1.0 V(maximum white). If you do not
use all of this range, the picture will have a low-contrast, dark or washed-out
look. Most pictures will have some black, some white, and a range of values in
between. If the average is more towards black, lighting may be uneven or there
may be too many reflections or highlights. Key elements may be too dark. If the
average is toward white, the lighting is too flat. A few shadows may add richness
to the scene.
The Creative Part of the
Video Signal