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5
System Interface
To combine the functionality of the HP 8564E spectrum analyzer
and the test set, a downloadable program (DLP) has been provided.
The DLP provides the system softkeys that set the parameters for
making an EMI measurement. Frequency ranges associated with the
test set hardware con gurations, can be selected enabling you to test
the harmonic frequencies of your equipment under test (EUT) while
ltering out the fundamental frequencies. Correction data is used to
sum out gains/losses due to the antenna, cables, ampli ers, and lters.
In the Log mode, the values displayed by the HP 84125C system are
the actual eld strength of the emission (in dB V/m), corrected for all
system gains and losses including the antenna transducers factors. In
the Linear mode, only the marker values are corrected and displayed
by the HP 84125C system (in dB V/m). The spectrum analyzer is
automatically set up for optimum signal identi cation.
System Interface 5-1
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