Filter Design System

Filter Design System












This system is specifically designed to help design mains filters that will reduce non-compliant emissions. It is able to measure conducted EMC emissions, to analyse CM and DM components, to measure EUT impedance, to calculate optimal component values and to enable the testing of proposed solutions prior to finalising the design.

Using this system avoids the usual trial and error methods, which are time consuming and often resut in an overengineered (and expensive) solution. Filter design and component selection are established by rigorous analytical processing of measured values rather than guesswork.


Kit Specification

Frequency range
 9KHz - 300MHz
 Sensitivity -80dBm
 Dynamic range
 Max level:

Standard EMC assessment
Common mode
Differential mode


Filter Design System provides the following products:

LISN & Voltage Probes      LISN & Voltage Probes
      These ancillaries enable compliant conducted emission tests. A wide range of LISNs plus voltage probe are available.
1GHz EMC emissions Analyser      1GHz EMC emissions Analyser
      The SA1002 is a fully featured EMC emissions analyser for all EMC compliance measurements up to 1GHz
Pre-Selectors for EMC test      Pre-Selectors for EMC test

Pre-Selectors are an essential requirement if measuring conducted emissions that have high broadband noise content. They effectively convert an EMC Analyser into a receiver, as specified by CISPR16.

See Technical Paper for a fully explanation of pre-selectors and why they are important.

Filter Design System - Mode Analyser - EA-300      Filter Design System - Mode Analyser - EA-300

The EA-300 is a core component of the FDS (Filter Design System).

This system is capable of analysing conducted EMC emissions from a product and using its inbuilt software to recommend component values and filter characteristics that would achieve the required reduction in emissions quickly and at minimum cost.

Filter Test Kit  FTK-05      Filter Test Kit FTK-05
      The FTK-05 is essentially a breadboard facility in which mains filter components can be plugged so that filter characteristics can be quickly assessed.  It is used in conjunction with the FAS system to provide a complete integrated filter design and optimisation solution.

Associated Downloads

EA-300 software - Filter design software for the FDS system
Filter design system summary. - Description of system operation.