255

3.0

191

Output

Level1.0

After 127

Gamma 2.0

Correction

63

0.5

 

 

 

 

.25

 

 

 

 

0

 

 

 

 

0

63

127

191

255

 

 

Video Level

 

 

Before Gamma Correction

Set the GAMC parameter to 1 to enable gamma cor- rection or 0 to disable gamma correction. When gamma correction is enabled, the value indicated by the parameter GAMA is used. The FMTN value of 2.2 is standard for North American television. European television standards commonly specify a value of 2.8.

Next, determine how the display receives horizon- tal and vertical synchronizing information. Some displays have one or two separate TTL digital sync inputs. Other displays require composite sync on the bottom of the analog video signal. Some multi- mode displays accept multiple types of sync.

If the display only requires separate digital sync in- puts, you can leave the remaining analog video and sync parameters at their default FMTN settings and go on to the section on “Digital Sync Parameters.” This will prevent composite sync from ever appear- ing on the analog video outputs.

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Quantum Data 801GC, 801GF, 801GX manual Output Level1.0 After Gamma Correction