The EUT power supply shall have adequate regulation to maintain the supply voltage within the limits specified: 13,5 V ± 0,5 V for 12 V systems, 27 V ± 1,0 V for 24 V systems, unless otherwise specified in the test plan. The power supply shall also be adequately filtered such that the r.f. noise produced by the power supply is at least 6 dB lower than the limits specified in the test plan.
Rent, buy or lease EUT power supply for the component/module test in CISPR 25. The EMC Shop specializes in automotive emissions and immunity testing.