ETS-Lindgren 3104C Biconical Antenna - Manual (Page 23)

Operation | 23
6.0 Operation
The Model 3104C Biconical Antenna has a traditional coaxial wound balun that
provides a broad frequency range and moderate gain for both transmitting and
receiving. This antenna may be used for radiated immunity measurements
provided that the peak input power is limited to no more than 100 W.
For enhanced measurement repeatability it is recommended that when the
Model 3104C is used vertically the same element orientation be maintained from
measurement to measurement. A white strip or dimples on the element block
mark the coax shield side of the element. Keep this side towards ground when
the antenna is used vertically to increase test repeatability, especially when the
Model 3104C is used inside a shielded enclosure.