ETS-Lindgren 3149 Hybrid Log Periodic and Bowtie (BiConiLog) - Manual (Page 30)

30 | Typical Data
Model 3149 Horizontal Measured Power
Power requirements scaled from measured data for 3 V/m at 80% modulation
over ferrite up to 1 GHz and measured over EHP-18PCL from 1 GHz to 2 GHz
(horizontal polarization). Reference point: 3 m from antenna tip and 1.2 m over
ground.