Ricoh FV-L500B1 manual Pulse Width Trigger Mode NonReset, Exposure Timing, 30 CLK

3.2.2Pulse Width Trigger Mode (NonReset)

Camera mode	Normal mode				Trigger mode				*Note. 1	Normal mode
							Automatically switch to the normal
							mode if the pulse width of the
							trigger signal is more than
Trigger signal								500 mseconds.
（Positive）
						*Note. 2
			Next VD		Next VD
Internal VD
		Sweep charges
				*Note. 3
				Exposure
CCD exposure				time

Video out

FVAL

*Note. 4

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

Note 2: The internal VD signal does not reset by the trigger signal.

The video output signal is sent out at the next internal VD timing.

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

Note 4: The FVAL signal does not output when the exposure by the trigger signal does not exists.

3.2.3Exposure Timing

Trigger signal

30 CLK

Exposure time

SUB

SG

				(741 CLK)
		T1
Filtering *Note.1
			T1'
	Exposure time: T1' = T1 + 741 CLK

Notes: The trigger signal equal to or shorter than 30 CLK is removed by the filtering system. Input trigger signal has to be more than 31 CLK pulse width.

The exposure starts 198 CLK after the rising edge of the trigger signal.

FVL500B1	17/31
User’s Guide Rev. 1.02