CV-M2CL and CV-M8CL
6.4.2. Edge Pre-select Mode
In EPS mode, the trigger leading edge will start an exposure at the first LVAL pulse if LS=0, (or
immediately if LS=1), and it stops and the resulting image is read out after the pre-selected
shutter time. It can be the 10 steps in normal or 1216 steps in programmable. SM=0 or SM=1.
This mode will operate with full and partial scanning.
An EEN pulse will indicate the active accumulation time, and a FVAL pulse indicates that the
resulting video is read out.
To use this mode:
Set function:
Trigger mode “Edge Pre-select”
TR=1
LVAL synchronous accum. to “synch” or “asynch” LS=0, LS=1
Shutter mode “Normal” or “Programmable”
SM=0, SM=1
“Shutter Speed”
SH=0 through 9
“Programmable exposure”
PE=1 through 1216
Scanning format
SC=0 through SC=4
Vertical binning (only M2)
VB=0, VB=1
Output select
OS=0, OS=1
Polarity and other functions
Input:
Ext. trigger to Camera Link or pin 10 on 12-pin connector.
Important notes on using this mode.
•
The duration of the trigger should be >2LVAL to <3FVAL.
•
If LS=0 (Synchronous accumulation), the minimum trigger interval is the longest of 1 FVAL
+ 3 LVAL or the exposure time + 3LVAL. The new exposure should not be finish before the
previous frame is read out.
•
If LS=1 (Asynchronous accumulation) the minimum trigger interval is the exposure time +
1 FVAL + 3 LVAL. A new trigger must not be applied before FVAL is low.
•
1LVAL = 47.9
µ
sec (single). 27.3
µ
sec (dual).
For horizontal timing refer to 6.2.3 through 6.2.6. (Fig.16. through fig. 19.)
For LVAL sync/a-sync accumulation, refer to 6.2.7 and 6.2.8. (Fig. 20. through fig. 23.)
LVAL
DATA OUT
SUB
SG
FVAL
OB
1
Ef f ect i ve Li nes
2L
2 3 4 5
11
97
11
96
11
98
12
00
11
99
1200L
4L
1214L
EEN
Ext . Tr i g1
4L
Re
se
r v
ed
4L
OB
Re
se
r v
ed
When t he LVAL Sync Accum. : 1. 5L
DVAL
Exposur e
Per i od
When t he LVAL Async Accum. : 0. 5 t o 1. 5L
Fig. 26. Edge Pre-select mode vertical timing. (Full frame).
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