Diagnose EMC Design Issues Quickly

Diagnose EMC design issues with EMxpert in real-time on your bench-top

My product failed the compliance test in an anechoic chamber. Why didn’t I see this coming?

My product should have passed the compliance test. It wasn’t supposed to have RF leakages and be susceptible to noise. Filters used should have minimized susceptibility to radiated spurious signals. EMI gasketing material used was supposed to be an excellent shield...

Why does my product fail?

Actual EMC test is almost left until the last step i.e. system level. If there is a problem, fixing it requires more time, budget and effort. If you can start testing earlier in the design cycle, you can lower the cost, speed time-to-market and increase your productivity. A few EMC design rules can be summarized as:

  1. Identify the transmitted and received noise sources.
  2. Control the path to ground for all signals.
  3. Keep the amount of RF energy allowed into the system as low as possible.
  4. Check the PCB layout for current loops and minimize the loops by adding return paths to ground as close as to the loop.
  5. Use ground plane that is inherent to the PCB structure i.e. analog ground plane for analog parts of the system and digital ground plane for digital parts of the system.

How can I diagnose EMC design issues earlier in the design cycle?

Conventional test methods are slow and costly. EMxpert can help you diagnose EMC design issues on a board level early in the design cycle.

EMxpert is already helping most leading consumer electronics manufacturers, military contractors and smart phone manufacturers to diagnose and debug EMC/EMI design problems at a board level before they take their systems for a final test in an anechoic chamber.

EMxpert is the only low-cost, high-speed bench-top solution for providing real-time analysis and optimization of your PCB designs.

With EMxpert, in seconds and a fraction of an anechoic chamber cost you can easily:

Analyze your high speed, high power and/or high density/complexity PCB designs.

Visualize the root causes of potential EMC and EMI problems.

Find, characterize, and address unintended radiators or RF leakage.

Pinpoint in less than a second the cause of a design failure even an intermittent problem.

Prototype & test new designs, components and forms.

Test & optimize multiple PCB (printed circuit board) design iterations on your lab-bench.

Pre-test & resolve EMC and EMI problems early on to avoid unexpected EMC compliance test results

…all for a fraction of the cost of an anechoic chamber.

How does it work?

EMxpert consists of a patented scanner, a compact adapter, a customer-supplied spectrum analyzer and a PC running EMxpert software (EMxpert setup diagram). EMxpert measures the magnetic field (H-Field) in two orthogonal directions using H-field probes.

The patented scanner is a passive device that couples the very-near-field emissions from the device under test. The measurements of these coupled fields are done with the spectrum analyzer and the adaptor synchronizes the spectrum analyzer and the patented scanner.

EMxpert software knows the insertion loss of each individual probe across the frequency range so it can apply compensation for the internal losses of the scanner.

The software will also apply the antenna factor compensation that will result in accurate H-field data being displayed. Interpolation between probes is done by the software so that features smaller than the probe spacing can be resolved.

The patented scanner consists of 1,218 H-field (magnetic) probes that operate between 150kHz and 8GHz. Probes are wide band but not very sensitive across this band thus they are very good at rejecting background noise.

Each row and column on the patented scanner corresponds to a unique probe that is spaced every 7.5 mm into an electronically switched array, which provides an effective 3.75 mm resolution. Electronic switches enable the probes to sweep the entire board under one second.

How does the world's quickest and cheapest antenna pattern measurement system RFxpert work?


World's fastest bench-top system to diagnose and debug EMC/EMI design problems: EMxpert

EMxpert provides spatial and spectral scans that allow design teams to address EMC design problems at their lab-bench in real-time.

Spectral scan measures and displays the maximum amplitude vs. frequency of the magnetic field strength over the scanned area. To characterize emissions, EMxpert quickly scans the board across a broad frequency range (150kHz - 8GHz). You can then select and characterize specific frequencies to observe how the noise evolves spatially across the frequency range. This allows the design team to map the noise, confirm its source, and implement appropriate mitigation. A spectral scan result is shown below. You can mouse over the spectral graph and analyze the problem frequency and amplitude.

Spectral scan to diagnose EMC design problems

Spatial scan measures the magnetic field of radiated electromagnetic emissions from the DUT at a single frequency as a function of position. EMxpert maps near-field emissions generated by current flow on the surface of the board. Measurements occur in real-time and this allows the design team to compare different design versions in seconds using the Spatial Comparison capabilities of the instrument. A spatial scan result is shown below. You can import the Gerber file of the PCB or simply the picture of the PCB. You can exactly find the location of the hot spot or current loop or intermittent event when you mouse over the graph.

Spatial scan to locate the sources of EMC design problems

EMxpert allows the design teams to diagnose and quickly address any unexpected emission problems with the EMC design. It will cut one to two design cycles out of your product development process. It also reduces their EMI testing time by up to two orders of magnitude.

Since 1989, EMSCAN is the world’s leading developer of fast magnetic very-near-field measurement technologies and applications, providing real-time test solutions to antenna and PCB designers and verification engineers, without the need for a chamber.

The EMxpert, a compact EMC and EMI diagnostic tool, and the RFxpert, an antenna measurement tool, enable engineers to quickly optimize their designs. EMSCAN solutions dramatically increase designer productivity and substantially reduce time-to-market and project development costs.




REQUEST A FREE evaluation demo kit

Demos are facilitated by a dedicated application engineer, not a sales person.

or call 1-877-367-2261

EMxpert customers
EMxpert customers

EMxpert customer testimonials
Andy Pienkowski,
Science Principal RF Wireless
Broadcom Europe

reduce test time to debug EMC design problems

REQUEST A FREE evaluation demo kit

Demos are facilitated by a dedicated application engineer, not a sales person.

or call 1-877-367-2261

EMxpert customer testimonials
Joel Burcham,
Chief Technical Officer

reduce time to market by debugging EMC design problems in real-time

EMxpert customers
EMxpert customers

REQUEST A FREE evaluation demo kit

Demos are facilitated by a dedicated application engineer, not a sales person.

or call 1-877-367-2261