This read-write object sets the transmit FEC type to one of uncoded(0), viterbi(1), viterbiReedSolomon(2), tcmReedSolomon(5), turbo(6), or tpcLdpc(7), noting availability depends on installed hardware options. This selection is gated by which optional FEC hardware is actually installed, reported via cdm570TurboOption and cdm570RSCodecOption, so attempting to set this to turbo(6) on a unit whose Turbo option reports none(0) would not be a valid configuration regardless of the link's needs. On a unit confirmed to have TPC/LDPC hardware installed, an admin chasing better link margin on a rain-prone site would set this to tpcLdpc(7) to gain stronger error correction than the older Viterbi+Reed-Solomon combination would provide.