MVPHD-24 Operations Manual Version 0.9.0 page 52 of 74
October 26, 2020
Phasing Using F1-BLU/F2-YEL Test Signal
Phasing Using
The MVPHD-24 generates a special test signal for the purpose of phasing the
F1-BLU/F2-YEL
camera with the monitor (“F1-BLU/F2-YEL”). It is a field alternating signal
Test Signal
that appears to the eye as a gray flashing image. The signal is actually blue in
field one, and yellow in field two. Since the camera shutter sees only 50%
of the picture (with a 180 degrees shutter), it will only see one of two fields. When
phased correctly, the shutter will see either an all blue or an all yellow picture. If
the shutter phase is not correct, there will be a split image that is part blue and part
yellow.
SHUTTER
OPEN
TIME
TOP
BOTTOM
SCA NNED
VIDEO
IMA GES
BOTTOM
RESULTING
PICTURE
CLOSED
TOP
BOTTOM
TOP
TOP
Figure 5-1. Vertical Phase difference of 90 degrees.
OPEN
TIME
TOP
BOTTOM
TOP
BOTTOM
CLOSED
TOP
BOTTOM
TOP
Figure 5-2. Vertical Phase difference of 0 degrees.