Ricoh Small Cubic Type 5.0 Mega Pixel CCD Monochrome PoCL Camera Link Camera FV-L500B1 - Manual (Page 20)

20/31
FV-L500B1
User’s Guide Rev. 1.01
3.4 H Reset Mode
Normally, video noise appears when the beginning of trigger signal is applied before finishing the video read-out
of the previous frame. This noise is caused by the SUB pulse, which is activated to clear all residual charges on the
CCD prior to a new exposure. By selecting this “H. Reset Mode”, the camera automatically holds the actual activation of
trigger until the next horizontal blanking period. By doing this, the SUB pulse is activated during the horizontal blanking
period and the noise in image can be avoided.
Due to the principal of this operation, there can be maximum “1 H” of delay of actual trigger signal .
Next HD
Video out
SUB pulse
Internal HD
CCD exposure
Trigger signal
(Rising edge）
Noise Noise Noise Noise
Normal SUB pulse timing