86 Keysight N774-C & 8162-C Series User’s Guide
4 User Interface Reference
The Optical Multiport Power Meter allows you trigger the instrument to
perform tasks and to output trigger signals to external measurement
instruments using the rear panel BNC connectors.
1Go to Settings -> Measurement Settings
2 Set the Trigger configuration
By default, the trigger level at the external trigger connector is active
high. This means when a trigger rises above the high TTL level (rising
edge), a trigger is accepted.
You can select three modes of triggering from the trigger configuration
menu:
• Disabled - to disable the trigger connectors.
• Default - to enable the trigger connectors.
• Pass Through - an input trigger will generate an output trigger. This
lets you trigger another instrument almost simultaneously.
3 Set the input trigger functions
The power meter ports can be configured individually to respond to an
input trigger by:
• Ignore (IGN) - The trigger is ignored.
• Single Measurement (SME) - The trigger causes a single power
measurement to be made.
• Complete Measurement (CME) - The trigger will cause an active
measurement function like logging to begin and continue until
completed.
• Multiple Measurement (MME) - Similar to Complete Measurement,
the first hardware trigger starts the function and if LOOP is not 1,
then multiple functions will be performed without waiting for further
triggers.
• Threshold (THR) - The input trigger allows to specify the minimum,
maximum threshold values along with the threshold units and
pre-trigger value.
4 Set the output trigger functions
The power meter ports can be configured individually to generate
output triggers for the following events:
• Disabled (DIS) - No triggers are generated.
• Meas. Started (MEAS) - An output trigger is generated when a
power measurement begins.
• Avg Time Over (AVG) - An inverted trigger is generated for each
measurement sample.
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