Terms containing non-return-to-zero change to one

Subject	English	Portuguese
IT, tech.	non-return-to-zero change-on-ones recording	registo sem retorno a zero por mudança dos "uns"
IT	non-return-to-zero change-on-ones recording	registo sem retorno a zero com mudança para o um
IT, tech.	non-return-to-zero change-on-ones recording	registo NRZ-1