Dalsa Spyder2 S2-1-40 Series, User Manual

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29 Spyder2 User’s Manual
03-32-10091-04 DALSA
3.13 Setting Gains
Optimizing gain in the analog domain allows you to achieve a better signal-to-noise ratio
(dynamic range) than you would achieve by trying to optimize the gain in the digital
domain.
To set the analog gain mode, use the command:
Syntax:
sg t f
Syntax Elements:
t
Tap selection. Allowable values are
1
for one tap or
0
for all
taps. Since the Spyder2 is a one tap camera, the values 1 or 0
are interchangeable.
f
Gain setting. A gain value of 0 sets the camera to its nominal
gain (0dB). The allowable gain value range is from
–10
to
10
dB.
Example:
sg 0 5.2
To set the digital gain, following a background subtraction, use the command:
Syntax:
ssg t i
Syntax Elements:
t
Tap selection. Allowable values are
1
for one tap or
0
for all
taps. Since the Spyder2 is a one tap camera, the values 1 or 0
are interchangeable.
i
Gain setting. The gain ranges are
0
to
511
(equal to a gain
from 1 to 1.999). Use this command in conjunction with the
ssb
command.
Related Commands:
ssb
Example:
ssg 1 15
Calibrating Gains
Instead of setting the analog gain to a specific value, you can have the camera determine
the gain value by providing the camera with an average output level to use.
Note:
This function requires a constant light input while it executes. This feature is
beneficial for achieving a common output level for multiple cameras in a system.