Imashini ya optique yamashanyarazi ni metero yukuri kandi iramba yagenewe gushyirwaho, gukora no gufata neza umuyoboro wa fibre optique.Nigikoresho cyoroheje gifite urumuri rwinyuma hamwe nubushobozi bwimodoka kuri off-off.Uretse ibyo, itanga urugero rwagutse rwo gupima, ubunyangamugayo buhanitse, umukoresha wenyine-kalibrasi yimikorere nicyambu rusange.Mubyongeyeho, irerekana ibipimo byerekana umurongo (mW) hamwe n'ibipimo bitari umurongo (dBm) muri ecran imwe icyarimwe.