Crystal Vision
Card edge operation
DEC104S User Manual R1.0
30
29/10/04
Setting 525 (NTSC) Setup
Use rotary switch (SEL) position 7 together with the shaft encoder in 5
25
(
NTSC)
mode
ONLY
to switch Setup (pedestal) compensation ON or OFF:
SEL 7
Display Text
Description
Setup on
7.5 IRE subtracted from black level, gain increased
Setup off
Black level and gain settings assume no 7.5 IRE offset
Note:
When the board is in 525 line (NTSC) mode, the shaft encoder can be used to switch
setup (pedestal) compensation on and off.
When setup compensation is ON the display will show “setup on”. The 7.5 IRE offset
will be subtracted from the black level and the gain will be increased to compensate.
This does not affect the Y Gain and Y Offset settings.
When setup compensation is OFF the display will show “setup off”. The black level and
gain will be set assuming no 7.5 IRE offset, in the same way as for PAL inputs.
The setup mode is preserved through 625-line operation and power down.
Restoring factory defaults
If required all settings can be returned to default values. This is done by powering the
module with rotary switch (SEL) in position 9 and piano switch lever 4 UP. The display
text will be 'DEFAULTS?' To restore default settings set piano switch lever 4 DOWN.
Note:
Moving the rotary switch away from position 9 will set the board to normal operation
without overwriting the previous settings.
On no account should the SEL switch be left in position 9.
