The IEC 61000-4-3 standard specifies the details for the RI test including test criteria and setup requirements. The IEC61000-4-3 test determines the EUT immunity to external electromagnetic radiation during operation. The test is performed in an anechoic chamber and the EUT is placed on a nonconductive table that is 0.8m tall. The test distance between the EUT and the antenna is 3m. The EUT is exposed to both horizontal and vertical field polarities at each rating. The RF test signal is swept from 80MHz to 1GHz, and from 1GHz to 2.7GHz with a disturbance signal of 80% amplitude modulated with a 1kHz sinusoidal signal. The field strength is 10V/m and 20V/m for each frequency range. The conversion data is captured from the EUT by the PHI controller card and sent to the laptop running the software script outside the chamber through the fully isolated optical fiber cables.

Figure 3-5 Diagram of Laboratory Setup for RI Test

Table 3-5 specifies the IEC 61000-4-3 test levels.

Figure 3-6 shows the actual setup for the RI test on the ADS124S08 EMC test board.

Figure 3-6 Laboratory Setup for RI Test

Figure 3-7 shows the ADS125H18 EMC test board output data during the RI test when the ADC measures the voltage input (left) and the current input (right). These graphs reveal that the interference signals did not affect the ADS125H18. Therefore, the ADS125H18 EMC test board passed the RI test with criteria A.

Figure 3-7 Voltage (Left) and Current (Right) Measurements Captured during RI Test

Table 3-6 shows the results of the RI test. The test result is the same for both the voltage and current channels on the EMC test board.