What is the immunity test system?

An immunity test system is a compact device that integrates major EMC test components such as an RF signal generator, power amplifier, power meter, directional couplers, relay switching unit, AM & PM modulators, and EUT monitoring interfaces in a compact box. It is used to generate the high-quality RF signal with the required amplitude, wave shape, and frequency range according to EMC standards to conduct EMC immunity tests. During the product development stage, the EMC immunity tests are conducted to check whether the equipment operates properly when exposed to a significant level of RF interference. In a word, the immunity test system features EMC test components in a single box to conduct EMC immunity tests.

Immunity test system

Immunity test system in EMC immunity test

The immunity test system complies with EMC standards such as IEC/EN 61000-4-6, IEC/EN 61000-4-3, ISO 11452-2/3/4/5, MIL-STD 461, RS 103, and other EMC standards. The integrated solution of this system helps to reduce the cabling work and possible cabling mistakes to a minimum. The immunity test system is ideal for use in both conducted and radiated immunity EMC testing.

Specification details of immunity test system:

Frequency: Represents the frequency range of RF signal that can be provided by the integrated signal generator in the immunity test system. Usually, it can generate the RF frequency range of Hz to GHz as per EMC standards. 

Type: Represents the immunity test system is designed to conduct which type of immunity test. It can be used to conduct either conducted immunity test or radiated immunity test or for both conducted and radiated immunity tests.

Equipment: Represents the EMC equipment that includes in the immunity test system like RF signal generator, power amplifier, power meter, directional couplers, and other EMC test components.

EMC standards: Represents the EMC standards for which the immunity test system complies. 

Frequency resolution: Represents the frequency level by which the frequency can be increased or decreased. The immunity test system with a low value of resolution is better.

Output power: Represents the output power of the immunity test system in Watts (W).

Amplifier gain: Represents the power gain of the power amplifier in dB.

Gain Flatness: Represents the flatness response deviation (accuracy) in ± dB.

Harmonics (signal generator): Represents the harmonics present in the output signal of the signal generator. Usually, it is represented in dBc. For example, -30 dBc means that the harmonics power is 30 dB smaller than fundamental frequency signal power.

Harmonics (amplifier): Represents the harmonics present in the output signal of the power amplifier. Usually, it is represented in dBc. For example, -30 dBc means that the harmonics power is 30 dB smaller than fundamental frequency signal power.

Impedance: Represents the output terminal impedance of the immunity test system. Usually, the output impedance is 50 ohm.

VSWR: Represents the measure of how efficiently radio-frequency power is transmitted from the output terminal of the immunity test system into the load (EMC antenna). A low input VSWR is the indication of a good immunity test amplifier.

Number of channels: Represents the number of simultaneous outputs that can be generated by the immunity test system. The immunity test systems are available in single-channel to multi-channel options.  

Interface: Represents the type of interfaces like RS232, GPIB, USB, or LAN that it supports for remote control.   

EMC Immunity Test Systems from the leading manufacturers are listed on EMC Directory. View product details, download datasheets and get quotes on EMC Immunity test systems.