Although many experienced electrical engineers are knowledgeable in EMC, they seldom know exactly what must be done on your new product. Certainly, providing your engineers with EMC training will better prepare them to deal with EMC problems when they arise; however, it is unlikely that they will be able to solve all of them. Why? Because new products and technology, operating at higher frequencies, generate more emissions and new EMC problems. For example, loop radiation is a function of the square of the frequency, therefore, if you double the frequency you quadruple the radiation. As a result, whatever you did for EMC on the last product is never enough for your next product.
In today's highly competitive global market, everyone is adopting
scheduled and programs to minimize product cost and time to
You cannot afford to develop an EMC design by trial and error or use
fixes! Nor can you tolerate overly conservative designs that add
unnecessary cost to the product. But how do you determine exactly
what must be done? You call Henry Ott Consultants early
the product design cycle! Our experience has shown that the most
timely and cost-effective approach is a team effort that
our EMC expertise with your engineer's knowledge of the product.
we can usually develop a cost-effective EMC design quickly.
This is always the best approach, do it early not after-the-fact. Most EMC solutions are inexpensive or free when done early. As the design cycle progresses; from concept, to design, to prototype models, to testing, to production, the number of EMC mitigation techniques available to the designer decreases steadily. Consequently, the cost of achieving EMC steadily goes up.
This is the type of EMC consulting that we like to do! We work
with your engineers throughout the design cycle, giving EMC input
it is needed. After we get to know your product, much of the
work can be done in our office over the phone and/or by email. This is also
most cost effective approach for the client, and produces the best EMC
This can be done anywhere in the design cycle. We can look at part of the design (e.g., the PCB layout, or the shielding) or the whole design. Not usually as good as the up-front approach but it can still be effective. A typical EMC design review may take from one to two days depending on the complexity of the product.
This situation often arises after the client has failed one or more EMC tests, and asks us to find a fix for the problem. Scheduling may be a problem in this situation, since we have other commitments and the client wants the fix by "yesterday." There are also many additional constraints involved in this case, since the client does not want to change certain things (sometimes it seems that they want a fix without any changes). The time required to find a solution is hard to predict, typically this may take anywhere from a day to a week. This is the least cost effective of all the approaches to EMC.
We can also work with you up-front on a design in order to design
immunity into the product and avoid the problem discussed above. This
usually the best and most cost effective approach.