Pulse width control mode for non-interlace only

CV-M532

Cautions in the Pulse Width Control Mode.

1.Pulse width control mode is effective only in non-interlaced field accumulation mode.

2.The exposure start may be delayed up to 1H max., when the falling edge of ext. trigger pulse is not synchronized with the falling edge of ext. HD signal. To avoid this 1H jitter and delay, the falling edge of the ext. trigger pulse should be synchronized within 4.4 µsec. to the HD pulse. It can be the ext. HD in or the Internal HD out.

See cautions in Edge Pre-select Mode page 7.

3.The ext. trigger input is 75 Ohm terminated as factory setting. (R127 short and SW2-2 on). The

voltage level of the ext. trigger has to be 4.0 Vp-p ± 2.0 V. The duration should be more than 1 H negative going. >64 µsec. and < 60 msec. The input is AC coupled.

4.If the ext. trigger input and ext. HD input are from a source with TTL level, set SW2-1 and SW2-2 OFF for non-terminated. SW2-1 for HD signal, SW2-2 for ext. trigger pulse. See “7.2 SW2 on PK8057 Board”.

EIA (Non-interlaced / Field accumulation mode)

Pulse width control mode (for non-interlace only)

EIA : 1H = 63.5∝s

TRIG
1H more			1H	TRIG in
EXT HD
INT HD
INT VD
1.5H	9H		1H	1.5H	9H
EEN
Exposure time	12.5H		Exposure time		0.5H
0.5H
WEN	2H	9H	10H
	2H	9H	10H
CCD out		Effective pixels
		Effective pixels
		No.10 to 251
Video out	20H	242H	20H
	20H	242H	20H
	Blanking	Effective video	Blanking

- 10 -