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Setup and Modes of Operation
Setup
EMxpert is a very-near-field scanning system. It is composed of 1,218 H-field probes that operate between
150 kHz and 8 GHz. Probes are wideband but not very sensitive across this band thus they are very good
at rejecting background noise.
EMxpert does not require a special setup like a shielded room; the Device Under Test (DUT) may
sometimes however pick up strong ambient signals like those present in the cell band (850 MHz -2100
MHz) or radio FM band.
It is strongly suggested to measure the ambient noise in the test environment before running any scans
with EMxpert. First power off the DUT, start the EMxpert software and then setup a Spectral Scan for the
bandwidth of interest. Run the Spectral Scan and analyze the test results. If there is any ambient noise
being displayed the EMxpert’s comparison features will allow you to filter it from the actual DUT test
results.
Modes of Operation
1. PCB testing (smaller than the scan area)
Place the PCB directly anywhere on the grid of the scanner. If there are tall components that prevent
the PCB from touching the surface of the scanner, use of an LNA is strongly suggested. If the other
side of the PCB does not have any high components, you should scan this side.
2. PCB testing (larger than the scan area)
You can take snapshots of the DUT by using the scanner like a hand-held probe. You can either move
the scanner over the DUT or vice versa. Scan one particular area on the PCB and then move the
scanner to the next position.
EMxpert Software
Setup and Modes of Operation
