JAI CV-A1-20 - Manual (Page 9)

CV-A1-20
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 68 µsec. 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.
Ext. HD
Ext. VD
>1H
Ext. HD
Ext. VD
>1H
9 µ s 9 µ s 13 µs 48 µ s 48 µ s 68 µs
Fig. 13. Ext. HD and ext. VD phase conditions.
OUT
IN
HD VD
75Ω
TTL
HD VD
Fig. 14. Switch positions for int./ext. sync and termination.
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