CV-A10 CL and CV-A70 CL
6.3. Input/Output of Timing Signals
For switch settings, please refer to chapter “7.1. Switch setting by internal switch.”
6.3.1. Input of External HD/VD signals
External synchronizing is only possible in full and partial scanning. For trigger mode only ext. HD
can be input.
HD and VD input pins are shared with the RS-232C interface, which is factory default. SW301.2
(HD/RxD) and SW301.3 (VD/TxD). The video output is synchronized with external HD/VD signals
if applied. If no ext. HD is connected, the camera will switch to the internal X-tal controlled HD
sync. If no ext. VD is connected, the camera will continue with its internal VD.
The tracking range for H is 37.50 KHz
±
1%
The external HD/VD signal should be 4.0 Vp-p ±2.0 V from a 75
Ω
source.
External HD/VD synchronizing can be used for full or partial scanning, but not in binning modes.
Only external HD may be input in trigger modes.
Fig. 19 through fig. 22 shows timing details for external sync operations.
To use this mode:
Set function:
SW 301.2 and 301.3 to ON for external HD/VD input.
.
SW 302.3 and 302.4 to ON for 75
Ω
termination of HD/VD.
SW 302.3 and 302.4 to OFF for TTL level for HD/VD.
Input:
Ext. HD in on pin 6 on 12-pin connector.
Ext. VD in on pin 7 on 12-pin connector.
Important notes on using this mode
External sync system should follow the camera scanning system.
The ext. HD/VD phase relations should follow the shown in fig. 21.
1 HD or LVAL period = 26.7
µ
s
Fig. 19. VD timing for ext. synchronization
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