Texas Instruments MC-780PIx Security Camera User Manual


 
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 µs ± 1%)
VD signals: 262.5 H
Phase
In Figure 3–1, when the last VD transition is between 47.42 µs ahead and
16.13 µs behind relative to the last HD transition, it becomes the ODD field.
When the last VD transition is between 16.13 µs ahead and 47.42 µs 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