Chapter 3 Spectrum Analysis Operation
Changing the input impedance
9102 Handheld Spectrum Analyzer Software version 5.31
63
2 From the main menu, select Level.
3 In the vertical menu, select the impedance of the device, that
means select
Impedance: 50 or Impedance: 75 , respectively.
New measurement results are presented with the new impedance
value taken into account. In addition, if the impedance is changed
to 75 and the power had been displayed in dBm, the new
measurements are shown in dBμV. If the impedance is changed to
50 and the power had been displayed in dBμV, the new
measurements are shown in dBm.
NOTE
Signal reflections on the cable between the 50 and the 75
device affect the measurement accuracy of the 9102 Handheld
Spectrum Analyzer. For more accurate results, Aeroflex recom-
mends using an impedance converter; such a converter will cause
attenuation affecting the results. This attenuation can be compen-
sated as explained in section “Compensating gains and losses” on
page 61.
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