IEEE 802.3cn-2019 pdf free download

IEEE 802.3cn-2019 pdf free download.IEEE Standard for Ethernet Amendment 4: Physical Layers and Management Parameters for 50 Gb/s, 200 Gb/s, and 400 Gb/s Operation over Single-Mode Fiber.
122.8.4 Outer Optical Modulation Amplitude (OMA0)
Change the text oft 22.8.4 us folio j’s (Figure 122-3 remains uncha,,ged):
The OMAoutcr of each lane shall be within the limits givcn in Table 122–9 for 2O0GBASE-FR4 and 200GBASE-LR4. and 200GBASE-ER4 and in Table 122-10 for 40OGBASE-FR8 Qnd 4O0GBASE-LR8 and 4000BASE-ER8. The OMAOULCF is measured using a test pattern specified for OMAOUtCr in Table 122—15. It is the difference between the average optical launch power level P3. measured over the central 2 UI of a run of 7 threes, and the average optical launch power level P0. measured over the central 2 UI of a run of 6 zeros, as shown in Figure 122—3. For this measurement the sum of the optical power from all of the lanes not under test is below —30 dBm. or if other lanes are operating, a suitable optical filter may be used to separate the lane under test.
122.8.5 Transmitter and dispersion eye closure for PAM4 (TDECQ) change the first paragraph of 122.8.5 as follows:
The TDECQ and TDEC’Q — lOlog1jçof each lane shall be within the limits given in Table 122—9 for 200GBASE-FR41-mitl 200GBASE-LR4. and 200GBASE-ER4 and in Table 122—10 for 4OOGBASE-FR8 and -400GBASE-[R8. and 400GBASE-ERX if measured using the methods specified in 122.8.5.1, 122.8.5.2, and 122.8.5.3.
122.8.5.1 TDECQ conformance test setup
Change the second paragraph of 122.8.5.1 ax follows:
Each optical lane is tested individually with all other lanes in operation and all lanes using the same test pattern. There shall he at least 31 UI delay between the test pattern on one lane and the pattern on any other lane, so that the symbols on each lane arc not correlated within the PMD. The optical splitter and variable reflector are adjusted so that each transmitter is tested with the optical return loss specified in Table 122—16. The stale of polarization of the back reflection is adjusted 10 create the greatest RIN. The optical filter is used to separate the lane under test from the others. Each optical lane is tested with the optical channel described in 122.8.5.2. IEEE 802.3cn-2019 pdf free download.