Help! pass through High + ping high emp-8602

Good Night I have a RB153 and 1 emp-8602. When I pass through it passes of 1.8mb ping goes more for 1000ms or. I use a source of 24v 2a. who would know the reason? tx to power this in 23db, I tested with power lower. Not use hotpost or ppp. I tested with equal other cartao I happen the same. MK 3.2. they forgive the English… I say Portuguese (Brazil)

http://forum.mikrotik.com/t/how-many-clients-rb153-3xr52h/20015/1