Thank you for the official reply.
I always send the signal like
guitar (TS OUT)-> guitar preamp ( 1 TRS OUT)-> eclipse (2 Stereo Balanced XLR OUT)-> Recording Interface
now I try
guitar(TS OUT) -> guitar preamp (1 TRS OUT)-> BBE 831(1 XLR OUT) -> eclipse (2 Stereo Balanced XLR OUT)-> Recording Interface
and I found only 1 Eclipse Balanced Out is on the normal volume,
another XLR Out and the Eclipse Unbalanced Out is very small volume with the noise sounds like the overload.
I checked the cables its fine without any problem. and I try to turn the default factory setting.
I hold down the 8 key and power on to clean all the setting, but it can't fix the situation.
(can't fix even I turn to the 3.5 updated or earlier updated)
Am I miss any step? I read the manual for a long time, but I can't found the solution.
Please help me because we don't not any professional eventide technical engineer in our country.
Thank you so much.