one CM9 , with direct dish antenaa.
antenna make link on 3km.
on this cm9 I have connect one more user, on 60 degree from left on 1km
link have -50 tx/rx
user have -56 tx/rx
link have 4/4mbps 800/800pps , ping are 1-5ms
when user have 1/1mbps 100/100pps ... ping on link go to 1-150ms
with 1mbps/256kbps ping are 1-30ms
btw, when link have 8/8mbps , 1500/1500pps, ping are 1-5ms
only when this user have 1mbps traffic , we have problem.
I think maybe degree of user can cause this , but signal are ok ...
, what can cause this problem?