RB951G-2HnD wireless antenna operating mode is 1T2R or 2T2R, or 2T1R?
Two antennas total. Each antenna can both transmit and receive. This is MIMO 2x2
It is 2r2t, but ROS itself only opened a road, to open in the wireless interface HT.
Sorry, I don’t quite understand ?
ROS is the default when only one antenna signal, another day to set in the wireless interface is arranged in the only signal.
Sorry, still don’t understand 
What is your native language?
IT should use google translate.
He said that only one chain is active by default etc…
Both chains are active by default.
i’ve been looking for the antenna mode in the wireless tab (advanced mode) on routerOS v6.8 but i just couldn’t find it.
Either through Winbox or browsing (/webfig/#Wireless.Interfaces.6), i just can’t setup Tx to A antenna and Rx to B antenna.
Some help needed 