waveboy
Electrical
- Mar 19, 2006
- 66
Hi,
This concerns conducted EMC testing for offline SMPS
They use a spectrum analyser and a LISN. The spectrum analyser can be irepairably damaged by..
1....the detector in the Spec Anal getting overloaded by the input from the LISN
2...The RF input of the SPec An getting overpowered
3....Turning the LISN power off when its connected to the Spec An.
Its very difficult to be sure your setup is not going to damage your spec an. So why dont they build a unit which combines both
spec An and LISN? (then the LISN could be controlled so it doesnt damage the Spec An.
Also, why isnt their such thing as gerbers and BOM for an offline SMPS, with its correct conducted EMC scan from 150k to 30M, so that people can
check if their spec An is already damaged, by simply doing a test on the SMPS and seeing if it corresponds to the shared results?
This concerns conducted EMC testing for offline SMPS
They use a spectrum analyser and a LISN. The spectrum analyser can be irepairably damaged by..
1....the detector in the Spec Anal getting overloaded by the input from the LISN
2...The RF input of the SPec An getting overpowered
3....Turning the LISN power off when its connected to the Spec An.
Its very difficult to be sure your setup is not going to damage your spec an. So why dont they build a unit which combines both
spec An and LISN? (then the LISN could be controlled so it doesnt damage the Spec An.
Also, why isnt their such thing as gerbers and BOM for an offline SMPS, with its correct conducted EMC scan from 150k to 30M, so that people can
check if their spec An is already damaged, by simply doing a test on the SMPS and seeing if it corresponds to the shared results?