4820 Surepoint Solution System Reference; Using Manual Adjust - IBM 4820 System Reference Manual

Using Manual Adjust

Normally, you do not need to use Manual Adjust since Auto Adjust sets the
parameters at the optimum default value. However, Manual Adjust allows you to:
v Decrease the screen noise
v Adjust the screen display position and size
To reduce the noise, adjust the Phase and Clock parameters.
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4820 SurePoint Solution System Reference