EXFO T200S, User Manual, Page: 35 / 146

Setting the Emission Wavelength/Frequency
Tunable Laser Source
29
Tuning the Emission Wavelength or Frequency
To apply the defined steps to the emission wavelength/frequency:
1.
In the TUNE mode window, in the Step area, select the step value that you want to use
as increment or decrement step.
2.
Decrement or increment the wavelength/frequency step by step by touching
the and buttons.
The wavelength/frequency is increased or decreased by the selected step value,
without high accuracy (relatively from the absolute wavelength/frequency position).
Generating an Output Trigger Signal during Emission
In TUNE mode, the T200S can generate a trigger signal once the laser has stabilized on the
selected position (for more details on signal levels, see
Technical Specifications on page 1).
To activate the output trigger:
1.
In the TUNE mode window, touch the button.
The mode setting menu appears.
2. In the
Tune Control
area, select the
Trigger Out
check box.
The icon appears in the
Parameters
area of the TUNE window to indicate that the
trigger is activated.
The trigger signal is high when the laser is in a stable wavelength/frequency position. If
you modify the laser position, the trigger signal is disabled (low) until the laser reaches
the new position.