四川腾光厂家生产在线式光纤衰减器，光纤固定衰减器 applicatio optic-fiber communication systems optical fiber seor optical fiber test equipment optic-fiber catv specificatio item standard wavelength flattened broadband operating wavelength(nm) 1310 or 1550 1310/1550 bandwidth(nm) ±20 ±40 attenuation value (db) 1~30 return loss (db) ≥40 operating temperature ℃ -25~+70 storage temperature ℃ -40~+85 industry standard telcordia ta-nwt-001209