Quick Reference – Immunity Test Steps and Test Time

Here is a quick reference for common EMC immunity tests for a given start frequency, stop frequency, and step size. Outputs are number of steps and time per test.

Test EN IEC 61000-4-6
(Conducted)
EN IEC 61000-4-3
(Radiated)
Start Frequency 150 kHz 80 MHz 1 GHz 1 GHz
Stop Frequency 80 MHz 1 GHZ 2.7 GHz 6 GHz
Step Size 1% 1% 1% 1%
Number of Steps 633 255 101 182
Time per step 3 3 3 3
Time (seconds) 1899 765 303 546
Time (minutes) 31.7 12.8 5.1 9.1
Time (hours) 0.53 0.21 0.08 0.15

This is just the test time per setup.

For the Conducted RF Immunity test, this should be multiplied by the number of ports under test.

For Radiated RF Immunity, this figure needs to be multiplied by 2 x antenna polarities and 4 x turntable positions, meaning the overall time is 8 times larger.

The outcome here is that to do a full radiated immunity test, from 80 MHz to 6 GHz, takes 3 hours. And that doesn’t account for setup time or investigating failures.