JAI LQ-200CL, User Manual

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LQ-200CL
14
6.2.1 No-Shutter mode with internal trigger
In this mode the camera does not accept an external trigger signal, as the line rate is generated
from an internal clock (user programmable, command LR). The exposure time is directly
proportional to the line rate (T
exp
= 1/line rate). This mode is used when there is no external
trigger signal available, and the speed of the object is fixed or can be pre-determined.
The line rate can be varied from 1 line period (L) to 1024L in 1 clock (25ns) steps (19 kHz down to
18 Hz). When using this mode, a special function called “One-push auto line rate” is available.
This mode automatically maintains a constant output level by changing the line rate. The line rate
is automatically adjusted in order to maintain sensitivity without reducing the S/N ratio.
To use this mode:
Set function
Trigger mode, No-Shutter TR=0
Trigger origin, internal TG=0
Line rate LR=2100 to 2150400
(52.5 µs to 53.8 ms in 25ns increments)
Optional functions when using this mode:
One-push auto line rate AR=0
Auto line rate reference AL=0 to 1023
One-push white balance WB
Fig.12 No-Shutter mode with internal line rate generator
Important Note

Only gain-based one-push white balance function (WB) is available with this mode.
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Data
LVAL
DVAL
EEN
Line rate 1L to 1024L
Effective Video
2048
Clearer timing diagram
required. No need to show
internal clock signals.