What does a Coherent Lightwave Signal Analyzer do?
- Enables total calibration to make hardware “golden”
- Analog front end path gains, phase angles
- Frequency response
- Path delays (skew)
- Removes laser frequency offset
- Removes laser phase fluctuations
- Presents resulting modulation field
- Constellation
- Eye Diagram
- Q plot
- EVM
- Can also model receiver function and even impairments
- Remove CD, ISI, etc.; measure BER
- Emulate a delay-line interferometer for differential signaling
Author: Daniel van der Weide