Is a Preamp necessary with EMI work?

Posted on: December 16th, 2020 by Doug Lovell

It’s generally recommended to use a preamp with a spectrum analyser when performing EMI and EMC pre compliance tests. The preamp is used to amplify the acquired signal above the noise floor for low level signals. So it’s very useful for EMI work.

Final determination will come down to what energy levels will be tested.