EXFO IQS-2400 WDM Laser Source for IQS-500/600 - Manual (Page 30)

Setting Up the WDM Laser Source
24 IQS-2400
Setting Modulation (for Dither and On/Off Modulation)
Setting Modulation (for Dither and On/Off
Modulation)
Modulation can be synchronized with a TTL signal coming from the
module itself (internal) or from another module (external). Default values
are Internal for synchronization and On/Off for modulation.
The module determines minimum and maximum frequencies.
For a dither modulation signal, you can select the depth and waveform of
the amplitude modulation signal added or overlapped over the CW signal.
The module's differential efficiency determines minimum and maximum
depths.
To set up the modulation:
1. From the main window, select the Settings function tab.
2. Select the Control and Modulation tab.
3. For the On/Off control mode, select the source synchronization mode:
internal or external from the Synchronization section.
Note: Synchronization can only be internal with Dither Modulation control mode.