JAI CV-M30 Functions and Operations, Input of External HD/VD Signals, Continuous Operation

CV-M30

6. Functions and Operations

6.1. Input of External HD/VD Signals

As factory setting the camera can be synchronized by external HD/VD signals. The external supplied HD/VD signal should follow the same standard as the camera setting for speed, scanning

and interlace. The signal level must be 4.0 Vp-p ±2.0V with 75 Ohm termination on. The termination can be switched off with the internal switch SW1 on the PK8212 board.

The VD input terminal is used for external trigger signal input in the random trigger modes. If no external HD is connected, the camera will switch to the internal HD.

If no external VD is connected, the camera will continue with its internal VD. For settings, see “7. Mode Setting.”

6.2. Continuous Operation

For applications that not require asynchronous trigger, but run in continuous mode, this mode is used. SW1-7 Trigger is set to Normal (OFF). The camera can operate in normal or double speed. It is set by with Sw1-5 or at pin 1 on 6 pin connector. The exposure time is selected with SW1-1 to SW1-3. The read out can be 2:1 interlaced, non-interlaced or partial scan. It can be set by SW1-4 and SW1-6. Partial scanning can only operate in non-interlaced mode. Maximum field rate with partial scan and double speed is 360 fields per second.

To use this mode

Set:	SW1-7 to OFF for normal shutter
	SW1-4 to and SW1-6 to interlaced, non interlaced.1/2 partial or 1/3 partial
	SW1-1, SW1-2 and SW1-3 to shutter speed.
Input:	If external synchronizing is used, input HD and VD.
	Ext. VD to pin 5 on 6 pin connector or pin 7 on 12 pin connector..
	Ext. HD to pin 6 on12-pin connector.
	75 Ohm termination is done with SW1-1 (HD) and SW1-2 (VD) on PK8212 board.
Refer to	“6.5.Timing Chart”

For settings, see “7. Mode Setting.”

6.3. External Trigger Mode

This camera has two external trigger modes.

1.Edge Pre-select Mode. (Asynchronous reset and exposure start by an external trigger.)

2.Pulse Width Control Mode. (Asynchronous reset and exposure controlled by the low period of the external trigger.)

EDGE Trigger

PRE-SELECT

PULSE Trigger

WIDTH

Exposure

shutter time

Exposure

Readout

Readout

Fig. 6. External trigger modes

The trigger input is AC coupled, and the exposure will start at the first HD pulse after the trigger falling edge. The trigger pulse width should be > 1H to < 1000H.

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