Calibrating Optical Stress Signals for Characterizing 10 Gb/s Optical Transceivers
The N4917A Optical Receiver Stress Test solution with the conditioning unit N4917A-E01 as shown in figure 1 targets the standards for 10 GbE  and 10 GFC .
Figure 2 illustrates an optical stressed signal which has to be applied to an optical receiver. While such a signal is applied to the optical input, the bit error ratio at the
receiver’s output has to be below a certain level (typically 1e-12) to be compliant.
Figure 3 shows the requirements of such stress signal generation from the IEEE 802.3ae standard. The fourth-order Bessel-Thomson fi lter is used to create ISI-induced vertical eye closure penalty (VECP). The sinusoidal amplitude causes additional vertical eye closure, the sinusoidal phase modulation represents jitter for the jitter tolerance test
according the jitter mask.