CV-L107CL
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6.6.1.
No-Shutter mode with Internal line rate generator
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. See chapter 7
(configuring the camera) for further details on this function. The line rate is automatically adjusted
in order 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. 9 No-Shutter mode with Internal line rate generator
Important Note
The “one-push auto line rate” function is not recommended for continuous web applications, as
the speed of motion needs to be adjustable in order to maintain the aspect ratio of the image.
Only gain based One-Push white balance functions (WB) is available with this mode.
Clearer timing diagram
required. No need to show
internal clock signals.
