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How to Use External Modulation
Keysight 81960A Compact TLS Module User's Guide
How to Set the Modulation Mode
1
Move to the modulation source parameter, [Mod Src], and press Enter.
2
Move to <Internal>, by using the cursor key, and press Enter. The text
Int appears in the Tunable Laser channel.
The following external modulation modes are available:
•
<External Analog> - External Analog Modulation. See the note.
•
<Backplane> - External Digital Modulation using Input Trigger
connector or Trigger Feedback from another module in the same
mainframe.
•
<Coherence Ctrl.> - Coherence Control
External Analog Modulation is not supported by the 81960A. The
NOTE
Command and Mainframe Menu point is included for compatibility.
External Digital Modulation using Input Trigger Connector
External digital modulation uses a TTL-level signal. Apply this signal to the
Input Trigger connector on the rear panel of your mainframe.
Figure 32
Figure 32
optical output. Digital modulation sets the frequency of the output signal.
External Digital Modulation
on page -59 shows how a TTL-level input signal modulates the
Operating Instructions
59
3
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