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3. Reference Level:
This feature is no longer relevant and will be removed at the next software release.
4. Measure Peaks:
It activates the peak marking feature whereby peaks are rescanned at a tighter
bandwidth in order to accurately measure the frequency as long as the peak’s value is 5 dB above
the average noise floor of the scan. By default the maximum number of peaks is set to 10. The
maximum number peaks that can be measured is 30. There is little value in activating this function in
the Spectral/Spatial node.
5. Peak Hold:
This feature is not active for Spectral/Spatial Scan.
6. Click Apply
Spectral/Spatial Scan Probes Tab
Select and activate the probes under the DUT. You can activate the probes by
either a left click on individual cells or by left clicking and dragging the mouse
and choosing Select Cells; or clicking on Select All to activate all of the probes.
Green indicates the activated probes.
You can deactivate the probes; either left click on already selected cells or by
left clicking and dragging the mouse and choosing Unselect Cells; or by clicking
on Select None to deactivate all of the probes.
When you mouse over the grid, row and column coordinates are displayed.
Using the wheel of the mouse will adjust the transparency of the JPG file to help
set the probes.
It is important to activate all the probes under the DUT to have a complete view of the emissions from
the DUT.
Overlay Editor
Please refer to
page 40
.
Amplitude Adjustment Tab
You can use an LNA or attenuator with EMxpert to increase or decrease the power level of the signals
coming from the scanner and going to the spectrum analyzer. To activate click on Amplification Setting or
Attenuator Setting and then select the value from the drop down menu or type the value. The displayed
value of the signal will be corrected for the value of the gain or attenuation.
Internal Analyzer Pre-Amp:
This feature provides extra sensitivity. It is ON by default. Turn this feature
OFF if your spectrum analyzer is not equipped with a Pre-Amp.
EMxpert Software
Spectral/Spatial Scan
Note:
Importing design
file or the picture of
the DUT is highly
recommended.
Please refer to
Overlay Editor
section.