Sennheiser Evolution Wireless Digital Series Instruction Manual page 209

Connecting antennas
To ensure optimal reception even in the case of poor re-
ception conditions, we recommend using remote anten-
nas.
Connecting remote antennas
Mount an antenna each or a combination of an antenna and
▷
an antenna amplifier to the BNC sockets ANT RF IN A and
ANT RF IN B.
Refer to the instructions under „Information on antenna
▷
amplifiers and cable lengths".
EW-D ASA antenna splitter
208