NEC R 37 Xtra VERTICAL, HORIZONTAL, Composite Sync. & Video (Sync. on Green)

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Composite Sync. & Video (Sync. on Green)

VIDEO

HORIZONTAL

	B		C		D			E
					A
									VIDEO
VERTICAL
		P		P		Q				R	S
							O

Sync. Polarity: Negative

Recommended Sync Signal Timing Horizontal sync duty should be 3 to 30%. Horizontal sync width should exceed 0.9 ∝sec.

Horizontal back porch should exceed 2.0 ∝sec at sync on green and 1.2 ∝sec at others except when at 15KHz. Horizontal blanking should exceed: 7.0∝se at fH 15.75kHz, 3.3∝sec at 30 kHz<fH<50kHz, 2.9∝usec at 51kHz<fH<80kHz, and 2.7∝sec at 81kHz<fH<95kHz

Vertical sync duty should be 0.2 to 10%.

Vertical sync width should exceed 40 ∝sec or 2 horizontal lines. Vertical sync width plus back porch should exceed 0.4 msec. Interlaced signals are not recommended.

Interlaced signals with composite sync may not be displayed.

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