126 8163A/B, 8164A/B, 8166A/B User’s Guide
4 Laser Sources
How to Set Attenuation
The amount of power that is output from a source can be controlled. You
can use the attenuation parameter to reduce the optical power of the laser
output.
P
output
= P
source
- ATT (dB)
Where,
P
output
is the power level at the output of the module,
P
source
is the power level at the output of the source, and
ATTis the attenuation parameter.
To set the attenuation value to 2 dB:
1 Move to the laser source channel and press the [Details] softkey. You
see the screen in Figure 74 on page -126.
Figure 74 The Power Sensor Details Screen
2 Move to the [Attenuation] parameter and press Enter.
3 Enter 2.00 and press Enter.
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