Exfo PSO-100 Series Optical Sampling Oscilloscopes Manuel d'utilisateur Page 11

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Introducing the PSO-100 Optical Sampling Oscilloscope Series
Optical Sampling Oscilloscope 3
PSO-100 Optical Sampling Oscilloscope Series Basic Theory
PSO-100 Optical Sampling Oscilloscope Series
Basic Theory
The theory behind the Optical Sampling Oscilloscope is that the input
optical signal is repeatedly sampled in an all-optical gate with high
resolution.
The optical samples are detected and then A/D converted and buffered in a
data acquisition board. The data is transferred via USB 2.0 to a host
computer, where it is processed. An internal software synchronization
algorithm calculates the frequency offset between the signal and the
sampling frequency. As a result, you can view synchronized eye diagrams,
patterns, or pulses without the need for external triggering.
Signal
Sampling Pulses
Sampling
Gate
Time-Stretched Copy
Generated Samples
Detection, A/D
Conversion,
Visualization
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