ETS-Lindgren 3125 Precision Dipole Antenna - Manual (Page 19)

5.0 Application
Before connecting any components, follow the
safety information in the ETS-Lindgren
Product Information Bulletin included with your
shipment.
For emissions measurements, electric field strength in db[V/m] is obtained from:
E(dB[V/m])=V(dB[V])+AF(dB[1/m])+ α(dB)
V = the receiver or spectrum analyzer voltage reading
AF = antenna factor
α = cable loss in dB, if cable losses are non-negligible
For immunity testing, the electric field strength generated at a distance d can be
approximated by:
( )
E
Pg
d
V / m
=
30
d = distance, in meters
g = numeric gain (10
G[dB]/10
)
P = antenna net input power, in watts
Actual transmitted field strength should be verified using an ETS-Lindgren
electric field probe, or equivalent. In general, closer distances require less power
to create a given field strength.
Application | 19