SenTech STC-A33A Manual de usuario descargar pdf (Pagina 23)

STC-A33A

D. H Reset Mode

Normally, the video noise appears when the start of the trigger signal is applied before finishing the video 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 “H reset mode”, the camera automatically holds the actual activation of the trigger until the next

horizontal blanking period. By doing this, the SUB pulse is activated during the horizontal blanking period and the noise in the

image can be avoided.

Note: Due to the principal of this operation, there can be a maximum 1H of delay of the actual trigger signal.

Next HD

Video out

SUB pulse

Internal HD

CCD exposure

Trigger signal

(Rising edge)

Noise

Normal SUB pulse timing

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SenTech STC-A33A Manual de usuario Pagina 23