ETS-Lindgren 3140B Hybrid Log Periodic and Bowtie (BiConiLog) - Manual (Page 32)

( ) ( )
P E E P V / m V / m
= 2 1
To determine the additional amplifier overhead required to handle 80% amplitude
modulation, multiply the result by 3.24 (1.8 2 ). Actual transmitted field strength
should be verified using an ETS-Lindgren Model HI-6005 Field Probe, or
equivalent. The forward power data graphs on page 39 and page 40 show power
requirements for the lower frequencies at three meters based on measurements
using a field probe on an Open Area Test Site (OATS) over both conducting
ground and a (2.4m) 2 ferrite absorber field over conducting ground. For
IEC 61000-4-3 type testing, the antenna tip can be placed at any distance
between one and three meters from the Equipment Under Test (EUT) as long as
the front face plane is illuminated according to the -0, +6 dB uniform field
specification. In general, closer distances require less power to create a given
field strength.
32 | Application