E. E. Landsman,
Sc.D., Consulting Engineer, Founder, American Power Conversion
"The APC roadmap was to move up to
higher power products and we knew that there would be greater challenges
in solving the sure-to-occur conducted and radiated emissions issues.
Before taking our prototypes to an official test lab, we scan for
emissions in our unofficial in-house facilities. We try to find
and fix "sources" and build in filters, if required, rather than
have "patch" filters applied to the product by the testing house,
which would make our product more expensive.
It was suggested that we send selected engineers and test technicians
to an appropriate course in order to equip them with the latest
techniques so they would be better at up-front design and able to
diagnose and correct problems in a timely manner. Silent Solutions
offered such a course and Mr. Hill was engaged to teach the classes.
The course was excellent. He started with a short review of the
basic theory, then simple examples and practical guidelines, followed
by demonstrations using actual radiators and receiver/analyzers.
The sessions were refreshing because he encouraged questions and
spent whatever time was required to answer them. When he could not
answer a question immediately, he would return to the next session
with the answer. Our employees work in an atmosphere where they
are encouraged to ask questions, no matter how silly they might
seem, and this class was no exception. Rather than hurrying the
class along, Mr. Hill encouraged the questions and spent time, even
on the "silly" ones.
Our new products had emissions problems even using the design techniques
learned in the classes. Mr. Hill was then engaged as a consultant
to help us solve them. He was an immense help and kept our schedule
going. He worked tirelessly as he applied procedures taught in the
classes plus others drawn from his vast experience on other jobs.
The products involved higher power levels and circuits that Mr.
Hill had no previous experience with. Our engineers taught him how
our products worked, and he helped to troubleshoot them. He brought
a patient, organized approach to what had previously been a chaotic