EMC Design Guidline - How to reduce RF emissions EMC regulations and standards for automotive electronics in US, Canada, Europe Test frequency bands comparison table for CISPR-25, GM, FORD, CHRYSLER: Conducted Emissions - Voltage Method frequency bands Conducted Emissions - Current Method frequency bands Radiated Emissions frequency bands 2007 Radiated/Conducted Emissions for AM bands Emissions OEM Frequency Band NB/BB dBuV Voltage Current CE DCX G1 (LW AM – EU) 0.15 – 0.28 MHz 50 (PK/AV) 30 (PK/AV) 60 (PK,QP) 40 (PK,QP) G2 (MW AM) 0.53 – 1.7 MHz 34 (PK/AV) 6 (PK/AV) 50 (PK,QP) 22 (PK,QP) G3 (SW AM – EU) 5.8 – 6.3 MHz 33 (PK/AV) -1 (PK/AV) 40 (PK,QP) 6 (PK,QP) GM G1 (MW AM) 0.53 – 1.71 MHz 42 (PK) N/A 50 (QP) N/A FORD G1 (MW AM) 0.53 – 1.7 MHz 66 (QP) N/A RE DCX G2 (AM) N/A G2 (AM) N/A GM G1 (MW AM) 0.53 – 1.71 MHz 30 (PK) 24 (QP) FORD G1 (MW AM) 0.53 – 1.7 MHz N/A 30 (QP) Small changes in the configuration of conducted-emission tests can give rise to considerable variations in measurement readings, especially at higher frequencies. Errors introduced by the human factor (planing, geometrical requirements of the test setup), as well as the latitude provided by the standard, are two major causes of poor repeatability in these tests.   Vs [MHz] VBW RBW Step Size Time/Step CEI, CEV, RE ALSE Vs ≤ 2/3 RBW * fm 30 KHz  9/10 kHz  ≤ 5 kHz  > 5 ms     30 KHz 100/120 kHz ≤ 60 kHz > 5 ms  Legend: Vs [MHz] = Sweep speed, fm [Hz] = Modulation Frequency, VBW = Video Bandwidth, RBW = Radio Bandwidth

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