i have a mikrotik AP/bh composed of an omni antenna 5.7ghz 12dbi ,333rb with 350mw card for the AP.
at client site about 1 km i have nanostation5 running and connecting with signal of -64.

the problem am facing is when i ping the AP from client side, the pings are so high as 1500ms.
opening a web browser takes very long time.can someone help here.

As far as I can see, everyone switch from using omni antennas to several sector ones. Maybe your AP is overloaded, what about CCQ? You are not providing enough information currently...

How many clients?

How much bandwidth is being used?

20MHz channel?

PTP file sharing?

Got QoS set up?

this is one of the information from my AP.

signal strength -72
Tx signal strength -71
signal to noise -31dbi
tx/rx ccq 59/20%
p throughput 16953

my AP is running on frequency 5320

RX CCQ is too low. Fresnel zone (radio line of sight) OK ? What about interference? This is why I like to use NSTREME !!!