If a spectral error correction code is used , the forward efficiency is reduced from the uncoded modulation efficiency figure . If a spectral error correction code is used , the forward efficiency is reduced by the uncoded modulation efficiency .
Jika kod pembetulan ralat spektrum digunakan, kecekapan ke hadapan dikurangkan daripada angka kecekapan modulasi yang tidak dikodkan. Jika kod pembetulan ralat spektrum digunakan, kecekapan ke hadapan dikurangkan oleh kecekapan modulasi yang tidak dikodkan.