CV-A10 CL and CV-A70 CL
6.4.4. Edge Pre-select Trigger Mode
An external trigger pulse initiates the capture, and the exposure time (accumulation time) is the
fixed shutter speed set by SH or PE. The accumulation can be LVAL synchronous or LVAL a-
synchronous. The resulting video signal will start to be read out after the selected shutter time.
To avoid up to 1LVAL time jitter in LVAL synchronous accumulation it is recommended to
synchronize the trigger to HD. (See fig. 23.).
Use LVAL synchronous accumulation (LS=0) for highest trigger rate. Here a new exposure can be
started while the previous is read out. The selected shutter time should end >2 LVAL after FVAL
goes low.
For timing details,refer to fig. 13. through fig. 17. and fig. 28.
To use this mode:
Set function:
Trigger mode to “Edge pre-select”.
TR=1
Scanning
SC=0
through
3
Vertical
binning.
(CV-A10 CL only)
VB=0 through 3
Horizontal
binning.
(CV-A10 CL only)
HB=0 through 3
Shutter mode to normal or programmable
SM=0, SM=1
Shutter speed
SH=0 through14
Programmable exp.
PE=0 through 625
Accumulation LVAL synch. or a-synch.
LS=0, LS=1
Other functions and settings
Input:
Ext. trigger. Camera Link or 12 HiRose
TI=0, TI=1
Ext. HD in on pin 6 on 12-pin connector.
(If used).
Important notes on using this mode
External sync system should follow the camera scanning system.
To
avoid
≤
1 LVAL jitter if LS=1, ext. HD/Trigger phase relations as shown in fig. 23.
Trigger pulse with >1 LVAL to < 1 Frame
If LS=0, the minimum trigger interval >(1 FVAL + 3 LVAL).
If LS=1, the minimum trigger interval >(exposure time + 1 FVAL + 2 LVAL).
Fig. 28. Edge pre-select. LVAL synchronized.
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