Functions and operations, Input/output of HD/VD signal

CV-M40

6. Functions and operations

6-1. Input/output of HD/VD signal

a)Input of external HD/VD signal (Factory pre-set)

To input ext. HD/VD signal, make JP9/JP11 short-circuited, and JP12/JP13 open-circuited. To change the termination of ext. HD/VD signal, it is neccessary to make the jumper JP8/JP10 short-circuited. All jumpers are located on PK8273 board. For details, please refer to 7-2- 3. Jumpers on PK8273 board.

Note : Factory pre-set is set at HD/VD input (TTL) .

b) Output of internal HD/VD signal

To output int. HD/VD signal, make jumper JP9/JP11 open-circuited, and JP12/JP13 short- circuited. All jumpers are located on PK8273 board. Please refer to 7-2-3. Jumpers on PK8273 board.

CAUTION

Int. HD/VD signal is effective only at 75 Ohm termination.

6-2. Ext. trigger/readout mode

Ext. trigger mode of CV-M40 allows 3 different driving modes, as follows.

Edge pre-select trigger	: Asynchronous reset by the external trigger pulse
mode	Exposure period controlled by 8-step fixed shutter steps
Pulse-width control	: Asynchronous reset by the external trigger pulse
mode	Exposure period controlled by the pulse width of the external trigger pulse.
Frame-delay readout	: Asynchronous reset by the external trigger pulse
mode	Exposure period controlled by 8 fixed shutter steps
	Video readout timing controlled by rising edge of the external trigger
	pulse.

6-2-1. Edge pre-select mode

In this mode, the exposure starts at the falling edge of the external trigger pulse. The WEN pulse originates from the camera.

The shutter speed is controlled by the SW1 switch on the rear panel of the camera and the RS 232C serial interface.

For details, refer to the timing charts section of this manual.

To use this mode, set up the camera as follows ;