i can't receive the longitude and dimension inside 50miles.

[qxl2203]

hi
My radarbox only can use outside 50 miles from aircraft.
i can't receive the longitude and dimension  when 50 miles inside of the aircraft .But can normal use when the aircraft fly away.
Has any one have the same problem?

qi xiaolei
www.chinaradarbox.com
email:  [email protected]