Power Control - Keysight N77 Series N7711A User Manual

2
Tunable Laser Source
N O T E
N O T E

Power Control

N O T E
N O T E
N O T E
46
The shown scale, dBm or W depends on the power unit selected in the Control
group box.
If the output indicator is blinking or dark green the real optical output power might
be different to the displayed value.
Set the target optical power
The Pset control allows you to set the target optical power regarding the
unit shown right of it.
Select the SI prefix of the Watt unit
This applies only if the power unit is set to Watt as described below.
The SI prefix selector allows you to select a desired setting between pW
and W for subsequent setting of the target optical power.
The SI prefix selector will stay as you set only if the cursor is in this selector or the
Pset control. It might be changed by the N77xx Viewer once the cursor leaves the
Pset line.
Select the power scale
Select Watt as the Power Unit for a linear power scale. The unit shown
right of the Pset control will change to a SI prefix Watt selector as
described above.
Select dBm as the Power Unit for a logarithmic power scale. The unit
shown right of the Pset control will change to a fixed "dBm" label.
Whereas this setting does not change any physical state of the laser module it
changes the internal power unit software state. For details see Programmers
Guide.
Keysight N77xx Series