Non pass more to 50 Mb

Hi Friends…
How to configure the Station B5 Lite to pass more to 300 Mbps. I make the configuration, apointment with 2 B5 Lite, but I pass only 50 Mbps. How I can improve more the trafic?

Please share your spectrum, better Combined spectrum. Then share your wireless settings. Please be sure you have high SNR, around 20 dB minimum.