JAI CV-A1 operation manual Input-output of HD/VD Signals, Ext. HD and ext. VD phase conditions

CV-A1

6.2. Input-output of HD/VD Signals

In the default setting the camera will accept external HD/VD signals on pin 6 and 7 of the 12 pin Hirose connector. If external HD/VD is applied, the camera will synchronize to it. If no external sync signals are applied, the camera will operate with its internal x-tal controlled sync. The camera scanning system should be set to the same as the external connected sync. In fig. 13 below, the time requirements to relation between VD and HD are shown. The high to low transition for the external VD pulse should be placed within the 48 ∝sec. time interval to HD. The input is TTL level as factory setting. It can be 75 Ohm terminated by the internal switch on the PK8342A board. SW2-1 for HD and SW2-2 for VD. On for 75 Ohm termination.

To output the internal HD/VD signals on pin 6 and 7 the internal switch SW1-1 and 1-2 on the PK8342A board should be set ON. The output is TTL level from a 75-Ohm source.

Fig. 14 below shows the switch positions.

To use this mode:
Set function:	SW 1 on PK8342A to IN for external VD/HD input. Factory default.
	SW 2 on PK8342A to 75 Ω for termination of VD/HD.
	SW 2 on PK8342A to TTL for TTL level for VD/HD. Factory defaults.
	SW 1 on PK8342A to OUT for internal VD/HD output.
Input:	Ext. VD in or int. VD out on pin 7 on 12-pin connector.
	Ext. HD in or int. HD out on pin 6 on 12-pin connector.

Important notes on using this mode

External sync system should follow the camera scanning and binning system.

In trigger modes there are no continuous VD out, only after each trigger input.

9∝ s 48∝ s

Ext. HD

Ext. VD

>1H

Fig. 13. Ext. HD and ext. VD phase conditions.

HD VD

OUT

IN

75Ω TTL

HD VD

Fig. 14. Switch positions for int./ext. sync and termination.

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