In the development environment the ETSi4334 is used to evaluate the EMC
characteristics of prototype boards prior to formal compliance testing.
Emission 'hot-spots' are highlighted so that tracks and components in need of
suppression can be identified. The effectiveness of suppression measures can be
evaluated by re-scanning and comparing with the original result.
The immunity performance of a prototype board can also be evaluated by
injecting noise into cables or even individual tracks and mapping the coupling
that takes place. Using this information designers can apply effective
suppression to protect vulnerable components and circuits.
If problem frequencies are encountered during OATS testing the ETSi4334 can be
used to identify the components and tracks which are responsible for emissions
at that frequency.
Remedial measures can be applied and their effectiveness assessed quickly and
accurately before returning to the OATS.
Having achieved compliance the board and its cables can be scanned and the
results saved as the reference compliant configuration for later comparison
with production units.
Once the compliant product enters production the ETSi4334 can be used to help
ensure that compliance is maintained throughout the production life of the
The ETSi4334 can be set up to automatically step through a number of scans of
the PCB and its cables. The readings are compared to the saved results from a
known compliant configuration, giving a final Pass/Fail result at the end. A
sample of the production PCBs can be tested in this way, as can those with
minor modifications or component changes.