The CDN specifications for the FNS-AX3 simulator compliant with IEC 61000-4-4 Ed2 Amd1 are rise time 5ns ±30% and pulse width 50ns ±30%, while the CDN specifications for the FNS-AX4 simulator compliant with Ed3 are rise time 5.5 ±1.5ns and pulse width 45

The CDN specifications for the FNS-AX3 simulator compliant with IEC 61000-4-4 Ed2 Amd1 are rise time 5ns ±30% and pulse width 50ns ±30%, while the CDN specifications for the FNS-AX4 simulator compliant with Ed3 are rise time 5.5 ±1.5ns and pulse width 45

Each simulator is described based on the standard document in effect at the time of manufacture, but the CDN design is almost unchanged.
Therefore, although there are individual differences, there is no major difference in the waveform.
・FNS-AX3-A16B: IEC61000-4-4 Ed2, Amd1 (CDN specifications: rise time 5ns ±30%, pulse width 50ns ±30%)
・FNS-AX4-A20: IEC61000-4-4 Ed3 (CDN specifications: rise time 5.5 ±1.5ns, pulse width 45 ±15ns)