The test vectors for CL177 Inner FEC have been updated for which the pad includes PRBS13 bits.

Three periods are under testing. The file "padding_data.txt" is of 24 rows and every 8 rows are for one period.

PRBS13 bits of the pad for the first period are obtained with the initial state being S<0:12>=0x1000, while those for the remaining periods are obtained with the initial state retained from the previous pad as defined in CL 177.4.7.2.
The setting of S<0:12>=0x1000 follows the style of the seed of PRBS9 used for padding in Annex 172A of 802.3df.

For each period, the scrambled PRBS13 bits are distributed into 8 rows every 114 bits.