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Tunable Laser Sources
How to Use Triggers
cursor key:
• <FRQ&RDY>, where the modulation signal is combined
with the laser-ready signal, so that the output is kept low
when there is no optical signal being output, for example,
when the laser is turned off, or
• <FRQ>, where the modulation signal is output all the time.
7 Press [OK].
8 Press [Close] to return to the overview or detail screen.
5.6 How to Use Triggers
Some Tunable Laser modules allow you trigger the instrument to
perform tasks and to output trigger signals to external measurement
instruments.
How to Use Input Triggering
You can configure your HP 81689A Tunable Laser module to
perform certain tasks when you apply a trigger to the Input Trigger
Connector.
CAUTION A maximum of 5 V can be applied as an external voltage to the Input Trigger
connector, see page 152.
Take care not to use the Trigger Output connector or the Remote Interlock
connector for modulation. Do not apply an external voltage to these
connectors.
To set your module’s Input Trigger Configuration:
1 See “How to Set the Trigger Configuration” on page 56 for how
to configure the trigger connectors.
2 Move to the Tunable Laser channel and press [Menu].
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