EMI Pre-Compliance DSA800 Solutions

RIGOL's EMI Measurement mode on our RSA Family of Real-Time Spectrum Analyzers provide our most complete EMI Pre-Compliance capabilities.

For engineers just getting started in EMI and those only looking for basic EMI visualization on a budget, the DSA Family of Spectrum Analyzers combined with the S1210 Software remains an incredible value for insight into emissions challenges.

To support these important customers RIGOL provides Spectrum Analyzers, RF Generators, Near Field Probes, detectors, and PC based software to meet basic EMI Pre-Compliance test requirements.


Common Test Configurations

Radiated Emissions                                                                                                                              

Pre-Compliance Radiated Emissions testing evaluates a design for the unintentional release of energy via an electromagnetic field. These fields can be generated by problems with layout, grounding, enclosures, cabling, and other structures that may be acting as unintentional antennas across the frequency band. Ultimately, the goal is to make sure the design will pass a full compliance test once it is ready for production.

Conducted Emissions                                                                                                                          

Pre-Compliance Conducted Emissions is how engineers test for unintended power that gets coupled or transmitted back into the power line. The focus these regulations is to make sure the power line remains ‘clean’ and that other devices on the circuit and the power grid won’t be effected.

To isolate the measurements from the power line noise and provide a stable impedance for these measurements a LISN or Line Impedance Stabilization Network is used. Additional hardware such as attenuators and transient limiters may be used to optimize the measurement system to test a certain device. Pre-Compliance testing of conducted emissions helps engineers avoid costly errors in their power supply design or procurement. For engineers selecting an off the shelf AC-DC power adaptor for their product, a basic conducted emissions test can make procurement decisions easier and eliminate surprises at the compliance lab.

RIGOL Spectrum Analyzers and S1210 EMI Pre-Compliance software can be configured to adjust for correction factors from LISNs, attenuators, and other devices. This enables engineers to confidently take their product to a compliance lab with high confidence of passing the first time.

Susceptibility & Immunity Testing                                                                                                       

Immunity tests a product’s ability to function when in close proximity to electromagnetic fields. There are two main types of signals used to test a product’s immunity:

Modulated waves – Often AM modulated waves across the frequency ranges of interest. These waves test the product’s ability to ignore power at frequencies that may be coupled into the device over time. These signals may effect a product’s communication, reliability, or logic.

Pulsed and Burst waves – These transients affect a device immediately and can cause a number of power and functional issues. Electrostatic discharge or ESD testing is a common type of transient immunity testing. These fast pulses can have different effects on a product and need to be considered as a potential source of reliability and functional issues.

In addition to RIGOL’s other Pre-Compliance instrumentation, immunity testing requires an RF source to generate high power modulated waves. Other types of equipment may need to be purchased for transient generation.

Pre-Compliance Products for the DSA800 Series Spectrum Analyzers

DSA800 & DSA700 Series Spectrum Analyzers                                                                                   

S1210 Pre-Compliance Software                                                                                                            

The S1210 software enables engineers to control, record, automate, and report on their EMI tests. It directly controls the DSA800 Spectrum Analyzers and includes correction factors for other antennas, PreAmplifiers, LISNs, Attenuators, Cables, and more. Test vs. imported or custom created limit lines in real time. Automate tests with separate pre scan and final scan settings and cycle through a complete test plan if needed. This level of repeatability and reporting brings new value to Pre-Compliance measurements. Finding EMI issues sooner in the design process saves time and money in product development.

Near Field Probes                                                                                                                                     

The RIGOL NFP-3 near-field probes can be used in conjunction with any spectrum analyzer to help identify sources of EMI as well as leaks in enclosures. They are electrically insulated to prevent shorting of live circuits and feature a thin profile to make it easier to probe daughter boards, standoffs, and other tight spaces in your design. The kit includes 4 magnetic (H) field probes, cable, and BNC-to-N-Type adapter.


The EMI option for the DSA800 series Spectrum Analyzers is a software option that can be added to an instrument at any time. EMI enables the Quasi-Peak detector and enables users to select additional RBW settings for EMI work. This option brings your Pre-Compliance measurements closer to the results from a compliance lab.

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