There are differences between 2 / 3 and 4 / 5 band modules in bidi module. 1. At the same distance, the signal quality of 4 / 5 band at the receiving end is better; 2. At the same distance, the attenuation value of 2 / 3 wavelength is greater than that of 4 / 5 band module. 2020年2月10日にL***hより発表された
