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User manual
Antenna model: AT3000
Rev 6.0 – September 2014
Clampco Sistemi is a registered trademark of
Calzavara SpA
– via Corecian, 60 – 33031 – Basiliano (Italy) http://www.clampco-sistemi.com/
2. Execution of measurement
The basic general procedure to measure electric field of CW signal at a given frequency with a generic spectrum
analyzer in a selected point of space can be described as follows.
1)
fix the antenna with the radome in the point selected and set the spectrum analyzer the spectral band of
interest;
2)
set the spectrum analyzer parameters (Start and Stop Frequency, RBW, detector type, etc.);
3)
measure in sequence the amplitude of the three components
E
x
,
E
y
,
E
z
using the manual or automatic axis
selection and compute the total electric field , i.e.
.
The point
3)
of the above procedure involves these further computations to be done for each component of
electric field (see also par. 3.4 of this manual):
take the reading
R
dBm
in dBm unit on the spectrum analyzer ;
convert the reading in dB V :
(50 ohm instrument impedence);
add cable attenuation and antenna factor K at the given frequency to get the value of the component of
electric field under measurement :
;
convert the result in V/m :
Some part of commercial spectrum analyzers provide the possibility to store the antenna factor and the
attenuation of the cable in use, so to display automatically the electric field in real time.
Summary of Contents for AT3000
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