
Model 5601MSC
Model 5601MSC Master SPG/Master Clock System
OPERATION
Revision 2.2
Page - 25
2.2.7. NTSC Genlock Operation
Figure 2-7: Lock Diagram #1 - NTSC Reference without 10field Reference
Figure 2-7 shows the timing relationship between the outputs of the 5601MSC and the applied NTSC
video reference. The master oscillator will lock its frequency to the NTSC video reference, and all
outputs will become frequency locked. This frequency locking process uses both the horizontal sync
and the colorburst to obtain an accurate lock. The applied NTSC reference should have no video
content and a low Subcarrier to Horizontal (SCH) offset to assure proper lock. The approximate SCH
value is shown in the
Inputs
status screen (see section 4.1.2). If the SCH error is higher than 30º, the
5601MSC will fall back to locking to the horizontal edge of the video only. If the SCH error is in excess
of 50º, or the colorburst cannot be accurately measured, the 5601MSC will report that the applied
reference is unlockable.
Содержание 5601MSC
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