9
CCD board lateral adjustment
Adjust focus and azimuth of digital optics
Loosen the
CCD board lateral adjustment
locking screws and
adjust the lateral position so that outer trace (perf) is off center by
1/5 major graticule to the left between goal posts. A correct
DRAS “lateral position” read out should be as close to zero as
possible. As you retighten the screws be careful not to walk the
board in the reader.
We are ready to
adjust the focus and azimuth of the digital
optics
. Because the optics have been preset, there is always the
chance that focus may be OK. Adjusting focus and azimuth are
similar for digital and analog. The reader clamp is loosened and
the reader is moved forward or back to adjust focus. When using
the ’scope a correct digital burst, the “Grass”, will be in good
focus and the center area will be somewhat darker, exhibiting
“hollowness”. Using DRAS you are looking for the highest
“focus” number. Expect to achieve high 60s to 70s with our
reader.
