Crystal Vision
Using the front control panel
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DEC102SUser ManualV1.0 05/11/03
Adjusting horizontal and vertical timing
Increasing the vertical position setting will delay the output relative to the reference in
increments of one video line. Press the 'F1' button to allow the shaft encoder to adjust the
vertical output timing. The shaft encoder LED will illuminate and an asterisk will appear
on the display next to 'VPOS'. The range of adjustment is one video frame. When the
maximum adjustment is reached the value wraps around to zero.
Increasing the horizontal position setting will delay the output relative to the reference in
increments of 37ns. Press the 'F2' button to allow the shaft encoder to adjust the
horizontal output timing. The shaft encoder LED will illuminate and an asterisk will
appear on the display next to 'HPOS'. The range of adjustment is one video line.
With an external analogue timing reference present the delay through the board depends
on these adjustments and the relative timing of the serial input and the analogue reference.
When both horizontal and vertical position settings are zero the delay thorough the board
will be minimum and the serial output will be timed to the analogue reference as per ITU-
R BT.601. The minimum delay through the board is approximately 1.7 lines in 10-bit
mode and 0.7 lines in 8-bit mode.
Adjusting chroma phase
Press the 'F3' button to allow the shaft encoder to adjust the chroma phase relative to
burst. This adjustment is available in 10-bit mode only. The shaft encoder LED will
illuminate and an asterisk will appear on the display next to 'PHSE'. The range of
adjustment is 360 degrees, in steps of roughly 0.1degrees. When the maximum
adjustment is reached the value wraps around to zero.
Adjusting input video timing
The horizontal delay adjustment varies the timing of the input video relative to input
syncs and blanking in 10 bit mode whichever source is the active reference.
Mode
Input video timing
10 bit
8 bit
Relative to input video syncs and blanking
No horizontal delay available
Press the 'F4' button to allow the shaft encoder to adjust the input video timing with
respect to the input video syncs in steps of 37ns. This adjustment is available in 10-bit
mode only. The shaft encoder LED will illuminate and an asterisk will appear on the
display next to 'HDEL'. The available range is -128 to +127 steps (r- 4.5
microseconds) relative to the factory default position. The value cannot be adjusted
outside this range.
Recalling defaults
There is no 'CAL' function for the timing adjustments. Defaults may be restored from
Statesman. See also 'Restoring factory defaults' in the Card-edge operation section.
