Chapter 12 EMF (EMI) Operation
Performing manual measurements
9102 Handheld Spectrum Analyzer Software version 5.31
207
7 On completion of the measurement the measurement result is
displayed with the graph automatically put on hold and the overall
calculated electrical field strength or power density, depending on
the selection you have made via
Measure > Display Calculation (see
“Specifying the display calculation” on page 202) is displayed. You
can now save your results trace on the instrument.
To clear the trace and start a new measurement press the H
OLD/RUN
function key or the
Auto softkey. You can also press the Quick or
Manual softkey, if you intend to perform a measurement of one of these
types.
Quick measurements Quick measurements are a convenient way of quickly determining the
maximum field strength by fast measurements with a predefined
measurement duration of one single sweep per measurement pane (x,
y, z). Apart from the predefined measurement duration the measure-
ment process is identical.
To start a quick measurement proceed as follows:
1 In the EMF (EMI) main menu select
Measure. Now, the EMF (EMI)
Measure menu is displayed.
2 Select the
Quick softkey and press Continue ! to start the quick
measurement. You can abort the measurement by pressing
Cancel
!
. From now on the measurement process is identical with the
process described for Auto measurements.
Performing manual measurements
The manual measurement mode provides you with a comfortable way
of performing EMF measurements using the 9170 Biconical Antenna.
For this type of EMF measurement the 9170 Biconical Antenna is
turned manually in each of the measurement directions (x, y and z),
usually mounted on a turning device. For each direction the 9102
performs the measurement of electrical field strength or power density
depending on the selection you have made via
Measure > Display
Calculation
(see “Specifying the display calculation” on page 202). You
start the individual measurements manually after turning the antenna
in the relevant direction. As for automatic measurements you can also
specify the measurement time for each direction. On completing all
three measurements the 9102 calculates the total result value.
As the k factor correction data are not automatically loaded and acti-
vated when using a biconical antenna you have to activate the appro-
priate correction table manually on your instrument. Also, as the
biconical antenna will often be mounted on a tripod and connected to
the 9102 via an extension cable, the cable factor has to be activated
manually.
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