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• Compare Spatial:
is a quantitative comparison between two Spatial Scans that is
generated by subtracting the values of the first scan from the values of the second scan cell
by cell.
To run a scan:
1. Place the PCB or other device under test (DUT)
on the patented scanner
2. Select the scan type on EMScanner software
3. Run the scan
Power up the PCB or DUT and place it on the
scanner aligning as closely as possible to the vertical
and horizontal guidelines. Lining up with the squares
assists you when importing overlays
Placing PCB on EMScanner
Spectral Scan
Spectral Scan measures and displays the maximum amplitude vs. frequency of the magnetic
field strength over the scanned area.
Add Spectral Scan node to Project node. Node settings window automatically opens.
Spectral Scan inherits the setting parameters that were selected in the settings of the Project
node. You can override any of the inherited setting parameters by modifying the tabs
in the Spectral Scan settings window. The tabs in the Spectral Scan Settings window are
covered in the following pages.
Spectral Scan Tab
1. Enter
Start Frequency
and
Stop Frequency
to identify the span of the Spectral Scan to be
implemented.
2. RBW (Resolution Bandwidth):
It is set by default
at 120 kHz and can be reduced to the lowest level
allowed by the spectrum analyzer. Decreasing the
bandwidth will improve the amplitude accuracy
and increase the sensitivity; the scan will however
take more time to complete. The bandwidth you
choose should not be disproportionate to the
span. The suggested ratio of Span/RBW should
be <10,000 e.g. 10 kHz bandwidth with a 100
MHz span, 100 kHz bandwidth with a 1 GHz
span so that the scan can finish in a reasonable
time.
3. Reference Level:
The maximum signal intensity that the spectrum analyzer can
acquire at a given frequency without clipping, this setting does not need to be changed
except when measuring very strong signals.
4. Measure Peaks:
It activates the Peak marking feature whereby peaks are rescanned
at a tighter bandwidth in order to accurately measure the frequency if the peak’s value is
