LM1881

SNLS384F – FEBRUARY 1995 – REVISED MARCH 2013

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Instead of using the vertical serration pulse separation, use the actual pulse width of the vertical sync period, or

64 µs in this example. This graph is linear, meaning that a value as large as 2.7 M

M

the pulse width of the vertical sync output pulse of the LM1881 is about 340 µs.

Figure 8. (a) Composite Video; (b) Composite Sync; (c) Vertical Output Pulse;

(d) Odd/Even Field Index; (e) Burst Gate/Back Porch Clamp

6

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