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

Please see comment #453 against D2.0 and page 45-47 of https://www.ieee802.org/3/dj/public/25_07/nicholl_3dj_01_2507.pdf for more details.

Three periods are provided. The file "padding_data.txt" has 24 rows and every 8 rows are for one period. Note that the pad in this file is not yet encoded by the Inner FEC, and not bit-pair interleaved.

The initial state of the PRBS13 bits scrambler for the first period is S<0:12>=0x1000.  The initial states for the remaining periods are retained from the previous pad as specified in 177.4.7.2.

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