Texas Instruments MC-780PIx, User Manual

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External Sync With Interlace
3-2 Using the External SYNC Mode
3.1 External Sync With Interlace
On the rear panel, set switch 5 of mode switch SW3 to ON.
3.1.1 External Sync Signal Input Conditions
-
HD signals: 15.734 kHz
±
1% (63.5
µ
s
±
1%)
-
VD signals: 262.5 H
-
Phase
In Figure 3–1, when the last VD transition is between 47.42
µ
s ahead and
16.13
µ
s behind relative to the last HD transition, it becomes the ODD field.
When the last VD transition is between 16.13
µ
s ahead and 47.42
µ
s behind
relative to a 1/2 H point from the last HD transition, it becomes the EVEN field.
Figure 3–1. External Sync Timing
1/2 H
1 H
HD
VD
odd field
VD
even field