R52HN impossible to use 400 Mbps

between 63 ~ 65 db

Do you have antennas connected?

no…

without antenn just for tests…

:laughing: :laughing: :laughing:

Thats a fast route to fried radios !

I run your export configurations…

and I dont get more than 65/65 Mbps

You’ve possibly fried your radio cards by not using antennas on them.

Add antennas, move the routerboards away from each other, and try again.

if the RX/TX power is greater than -30-35ish dbm move them further away.

ok…

I’ll test this with antennas

Do NOT use radios without antennas attached, otherwise you’ll blow up it up … :open_mouth: