SenTech STC-A33A Manual de usuario descargar pdf (Pagina 19)

STC-A33A

3. Pulse Width Trigger Mode (Non-Reset, Internal Sync)

Note 1: The camera does NOT switch to the normal mode when the long exposure mode is selected. This timing chart

shows when the long exposure mode is selected.

Note 2: The internal VD signal does not reset by the trigger signal. The video output signal is sent out at the next VD

timing.

Note 3: The exposure time is controlled by the pulse width of the trigger signal.

Note 4: The external VD signal inputs continuously during the external sync mode.

Note 5: The WEN signal does not output when the exposure by the trigger signal does not exist.

4. Pulse Width Trigger Mode (Exposure Timing)

Note 1: The trigger signal that is less than or equal to 30 clocks is removed by the filtering system.

Note 2: The Input trigger signal has to be more than 31 clocks pulse width.

Note 3: The exposure starts 63 clocks after the rising edge of the trigger signal.

Normal mode

Exoposure time

Trigger mode Normal mode

Autom atically sw itches to

normal mode if the pul se width

of the trigger signal is m ore

than 500 msec .

Note. 1

Function mode

Internal VD

CCD exposure

Trigger signal

(Positive)

Video out

Note. 3

WEN signal out

Note. 5

Note. 2

Note. 4

T1'

SUB

(127 CLK)

Trigger

singal

Exposure

time

Exposure time: T1' = T1 + 127 CLK

30 CLK

Filtering (Note.1)

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SenTech STC-A33A Manual de usuario Pagina 19