Sharpness - Rutter VDR-100G3 Installation Manual

9.5.4.1

Sharpness

The Sharpness section of the Adjustments page holds three scroll boxes to adjust the Phase,
charge pump (CPMP), and the voltage controlled oscillators (VCO).
1. Phase
Once the image position is adjusted, is may still display pixilation (visible noise), banding, and/or
soft edges. This means the image phase must be adjusted. To adjust the Phase:
Enter a value or clicking the up/down controls on the Phase scroll box (The range
available for adjustment is 0 to 31.);
The image changes immediately to reflect the change.
Continue to adjust the number until the image is sharp.
Example: The image is highly pixilated at the left edge. Adjust Phase to 16. and the image
appears clearer and more uniform. Adjust to 14, and the left edge of the image is now sharper,
repeat until desired image quality is achieved.
2. CPMP (Charge Pump)
When the image phase is sharpened, minor oscillation may still appear in the image. If so it may
be necessary to adjust the image CPMP.
Check for oscillations at either the top of the image or near any straight black lines where
they are most apparent;
Note the image quality and use the CPMP scroll box to set CPMP between 0 and 3;
The image is automatically updated to reflect the change
Note the image quality for improvement; and
Make further adjustments as necessary
.
Example: The image has varied individual lines of oscillation at its left edge. Adjust CPMP to 1.
The left edge of the image is now much clearer and uniform. Adjust to 2. The left edge of the
image is now sharp.
3. VCO (Voltage Controlled Oscillators)
NOTE: The VCO setting should NOT be adjusted unless the captured image is
severely distorted.
The VCO scroll box allows the installer to adjust the voltage controlled oscillator. The range
available for adjustment is 0 (default) to 3.
VCO range can be selected in accordance with the following table:
Pixel Rate Range (MHz)
Lower
Min
37
74
140
VDR-100G3/G3S Installation Manual
Chapter 9: Video Module, Rev. 1.2
VCORNGE Setting
Upper
37 OO
74 O1
140 1O
Max 11
Table 9-6 - VCO Pixel rate range (MHz)
9-22
VCO Gain, K (MHz/V)
VCO
150
150
150
180
06/10/2008