陰極 いんきょく せんオシロスコープであれば
inkyokusen'oshirosukōpudeareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 陰極線オシロスコープ

1. if it were a cathode ray oscilloscope; if it is a cathode ray oscilloscope

Ba Conditional