Edge Pre-Select Mode - JAI CV-A50 Operation Manual

6.5. Edge Pre-select Mode

The leading edge of the trigger pulse initiates the exposure. The exposure time (accumulation
time) is governed by the pre-defined shutter speed set by RS-232C.
The resulting video is output as "odd field" for EIA and "even field" for CCIR, and appear 9H
(EIA9 or 10H (CCIR) after the leading edge of WEN (polarity is user selectable).
To use this mode:
Set function:
Input:
Important notes on using this
•
The duration of the external trigger pulse must be greater than 1H. It is recommended to
make this longer, typically 9H.
•
Do not input external VD signal at Pin No. 7 of the 12-pin Hirose connector, as it may
disturb the external trigger function.
CV-A50 / CV-A60
Trigger mode to "Edge Pre-select"
Accumulation to "Field"
Scanning to "Non-interlaced"
Shutter mode to "Normal" or "Programmable"
Shutter Speed
or Programmable exposure
Polarity for trigger and other functions
Ext. trigger to pin 5 on 6 pin connector (or pin 11 on 12-pin connector).
Ext. HD to pin 6 on12-pin connector. (If used).
Fig. 17. Edge pre-select CCIR
Fig. 18. Edge pre-select EIA
mode:-
- 12 -
TR=1
FR=0
SC=1
SM=0, SM=1
SH=0 through 7
PE=1 through 1023