单项选择题
How many transmitters (TXs) can be configured to an omni antenna using a CDU-D?（）
A.2 B.6 C.8 D.12 E.16
单项选择题 How many transmitters (TXs) can be configured to an omni antenna using a CDU-C+?（）
单项选择题 Where is the TX reference point? （）
单项选择题 Antenna gain is obtained by...? （）
