Do you have questions about a specific type of instrument or measurement? Ask your local distributor.
What measurement do we need?
A LISN is a Line Impedance Stabilisation Network. It outputs the noise signals from the DUT over a 50 Ohm load, to be measured by a spectrum analyzer.
Is filtering needed?
Filtering of the LISN’s output is important is the DUT produces high interference outside the band of interrest. For signals below 150kHz, the standard does not provide a limit. If high net-harminic currents exist (multiples of 50Hz) these may saturate the input …
Is limiting needed?
Absolutely. When the mains voltage is switch on, a transient of 310Vp (when using 230Vac) may occur at the input of the spectrum analyzer.
Do I need to measure the Mains power of my device?
The CE requirements for powersupplies >75W stipulates the limits for net harmonics. These are the frequency components of multiples of 50 (or 60)Hz, upto the 40th harmonic.
A power analyzer like the DPA3011 performs these measurements, including inrush current …