Spyder3 Color Manual
39
DALSA
03-032-20059-01
Purpose:
Use this command to clear out dark current charge in the vertical
transfer gates immediately before the sensor is read out.
Syntax:
srm
Syntax Elements:
i
0
: Auto. Clears dark current below ~ 45% of the maximum line
rate.
1
: Dark current clear. Always clears dark. Reduces the
maximum line rate.
2
:
Immediate readout. Does not clear dark current. (Default
mode.)
Notes:
The vertical transfer gates collect dark current during the line
period. This collected current is added to the pixel charge. The
middle two red taps have more vertical transfer gates and,
therefore, more charge. This additional charge is especially
noticeable at slower line rates.
If the user is in
sem 2
or
7
and
srm 2
, with
ssf
at 45% of the
maximum, and then srm 1 is selected, the following warning
will be displayed, but the ssf value will not be changed:
Warning 09: Internal line rate inconsistent with readout time>
The effect in both internal and external line rate modes is that
an EXSYNC is skipped and, therefore, the output will be at
least twice as bright.
This value is saved with the camera settings.
This value may be viewed using either the
gcp
command or
the get
srm
command.
Related Commands:
sem, ssf
Example:
srm 0
Enabling Line Delay
Purpose:
Turning off line delay may result in a better image when you are
imaging a web that is moving extremely fast.
Syntax:
eld
Syntax Elements:
i
0
: Off.
1
: On.
Example:
eld 0
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