CCH S DNG THC THY1.Cch cm - Nh hnh di - Ngn ci xoay nm bt nc v ng v tr cn bng khi o

2.Vch ch trn thc - c kt qu theo vch pha di (90,80,70..10,0) - Khong cch gia 2 vch lin tip l 2o VD: Kim ch vo vch 88(vi anten CT0) hoc vch 92 (vi anten CT6) : ngha l anten ang nghing 2o so vi phng thng ng Kim ch vo vch 87(vi anten CT0) hoc vch 93 (vi anten CT6)- -hnh di : ngha l anten ang nghing 3o so vi phng thng ng

- Ch : iu chnh bt nc v v tr cn bng ri mi c kt qu o

3.Cch o vi anten CT0 (c g trn) - Cch cm nh hnh di - Do anten loi CTO c tilt in bng 0 nn gc tilt = gc nghing anten - Trong trng hp ny kim ch vo vch 84 nn gc nghin ca anten l 6o v tilt cng l 60

4.Cch o vi anten CT6 (c g di) - Cch cm nh hnh v - Do anten loi CT6 c tilt in bng 6 (khi anten thng ng th bp sng hng xung di 60) nn gc tilt = 60 - gc nghing anten - Trong trng hp ny kim ch vo vch 92 nn gc nghing ca anten l 2o v gc tilt l 60 20 = 40