Specifications

6-7
Analog Optical Alignment - Projector
L
L
L
L
RR
RR
✓
✓
OSCILLOSCOPE TRACES
The lens and exciter lamp assembly
are adjusted laterally for a null if the
film cannot be moved laterally.
The adjustment is correct when there is
no signal output while the film is played.
It may not be possible to adjust for a null
with some older slits; in such instances,
adjust for a minimum and equal signal
on L and R.
Some projectors use a lens with an
adjustable slit width. The adjustment is
correct at the point when the left and
right signals both disappear equally.
Remove the SMPTE Buzz Track test
film and thread and play the Cat. No. 97
Stereo Cell Alignment Film.
While the film is playing, look at the
oscilloscope. If a large amount of
crosstalk is present, loosen the stereo
solar cell head and move the head from
side to side until the crosstalk is
minimum and equal.
NOTE
:
The right channel is the track
toward the outside of the projector. On
some projectors, it may be necessary to
stop the film to adjust the position of the
cell.
Lock the cell bracket into position after
completing this adjustment. Check that
the crosstalk has not changed as the
bracket was tightened.