( ) is not a common measure for eliminating intra-system interferences.
A.Check antenna and feeder parts. Tighten the loosened connection or replace the aged or damaged part.
B.Conduct drive tests to locate the interferencE、
C.Modify the frequency: In a co-antenna feeder system, as one cell of a 2G system may employ several frequencies, intermodulation interference may occur among these frequencies.
D.Chek the eNodeB device and replace the faulty components.
正确答案是B