DDM diagnostics

The DDM screen shows a transceiver's Digital Diagnostic Monitoring in real time: temperature, supply voltage, laser bias current and optical power per channel.

What it displays

• Live values for each monitored parameter, updated on a configurable polling interval.
• Alarm and Warning thresholds drawn directly on the charts, so you can see how close a value is to its limit.
• Per-channel power for multi-channel modules (for example QSFP).

Logging and export

Measurements are logged over time and can be exported to CSV for reporting or offline analysis.

Reading the charts

For the meaning of each parameter, see DDM basics in the optics reference.

What the numbers should look like for a given module type: Typical values; how much to trust them: Accuracy & limits; which one predicts failure: Tx bias & laser ageing.