Passive Optical Networks

In reality, PON transceiver system tests have to take into account the bursty

nature of the data and the disparity in distances from each ONU to OLT. During

the process of OLT receiver sensitivity characterization, the signal amplitude and

clock phase can differ from packet to packet. Therefore, successive packets have

to be considered with a large difference in optical power and clock phase

alignment in order to catch the worst-case scenario. In other words, the OLT

receiver is regarded as part of a PON system in conjunction with several ONUs

and not only as a stand-alone point-to-point link receiver.

Figure 4.34 shows a typical system setup for PON transceiver module tests,

which resembles an actual field implementation of a PON system. It includes ...