2-70
Section 2 — Installation
Coarse adjustment of the format voltage levels are set by jumper selection;
however, you may need to fine tune these levels using the gain adjustments on the
DAC Mezzanines.
1.
Place the Analog Output Module on the I/O Module Extender (064834), and
select 100% Color Bars as the Program and Preview switcher output. (You may
use the internal signal for this adjustment which is accessible through the
Configuration [INPUTS] menu.)
2.
The gain adjustment trimpots are accessible with the DAC mezzanines
installed on the Analog Output Module. Connect a waveform monitor or
oscilloscope to the Analog Output(s). Terminate the scope or monitor’s inputs
in 75 Ohms. A component waveform monitor is convenient in that all three
output channels can be observed simultaneously, but it is only necessary to
observe one at a time.
3.
Adjust the gain controls to match the waveform for the desired format shown
in
for RGB.
NOTE:
In RGB formats, the gain controls are somewhat interactive. For best results,
adjust Y gain while observing green output such that the white color bar is at specified
level. Then observe red output and adjust R-Y gain for equal level bars having red content;
similarly, observe blue output and adjust B-Y gain for equal level bars.
Summary of Contents for Grass Valley 4000
Page 3: ...iii Tektronix Grass Valley Products P O Box 1114 Grass Valley CA 95945 916 478 3800 ...
Page 4: ...iv Tektronix Grass Valley Products P O Box 1114 Grass Valley CA 95945 916 478 3800 ...
Page 34: ...1 20 Section 1 System Overview ...
Page 138: ...2 104 Section 2 Installation ...
Page 196: ...3 58 Section 3 Functional Description ...
Page 286: ...Index 6 Index ...