Today’s Engineers are faced with integrating new technologies, challenging design parameters, and ever decreasing “time to market” development cycles. In most cases, compliance testing is the last hurdle to overcome before releasing a product for sale. Unfortunately, this philosophy can cause big delays if the product fails to pass the first time through the test lab.
You can speed up the process, learn more about your design, and decrease overall cost by implementing pre-compliance testing during your development cycle. Pre-Compliance testing involves using a few tools and techniques to find EMI trouble areas and then use that understanding to fix those issues before you even head to the compliance lab.
To support our customers who are focused on time to market and cost savings, RIGOL provides Spectrum Analyzers, RF Generators, Near Field Probes, detectors, and PC based software to satisfy all of your EMI Pre-Compliance test requirements.
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. Radiated emissions are radiated through the air, so there are two main ways to test for them:
RIGOL supports engineers by providing instruments, probes, and software programs that can adjust for calibrated antennas and varying emissions limits in a variety of radiated testing. RIGOL helps customers capture, adjust, and analyze radiated emissions data to speed a project’s time to market by identifying potential problems before they require extensive rework that extends the design cycle.
RIGOL’s EMI Pre-Compliance Application Note
This application note covers hints and tips for implementation of precompliance steps to help lower the cost of full compliance EMC testing. It also features a series of documents that have practical use details for EMC testing.
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.
Pre-Compliance Conducted Emissions
Learn more about proper test techniques for performing precompliance conducted emissions testing using a spectrum analyzer including test setup, common error sources, and instrument configuration.
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:
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.
How to use an RF generator to test radiated immunity and susceptibility.
|DSA800 Series Spectrum Analyzer||DSG3000 / DSG800 Series RF Signal Source|
|9 kHz to 1.5, 3.2, or 7.5 GHz Frequency Range||1.5 GHz / 3 GHz / 6 GHz versions available|
|PreAmplifier now included on all new instruments||Optional I/Q modulation and I/Q baseband outputs
*(DSG3000 Models Only)
|Displayed Average Noise Level (DANL) normalized to 1 Hz ranging from -135 dBm to -161 dBm typical||USB/LAN/GPIB interfaces standard. Supports LXI-C and SCPI command set|
|-80 to -98 dBc/Hz @10 kHz offset Phase Noise||AM/FM/øM modulation standard. Standard pulse modulation|
|Total Amplitude Uncertainty from <1.5 dB to <0.8 dB nominal||Pulse train generator option|
|10 Hz Minimum Resolution Bandwidth (RBW)|
|Options include Tracking Generator, EMI measurment kit, Advanced measurement kit, Preamplifier and Case|
DSA8, DSA1000, DSA1000A Spectrum Analyzers:
The S1210 Pre-compliance software simplifies EMI pre-compliance testing by providing an easy-to-use interface for scan setup, limit line construction, scan and peak data evaluation, and a handy pre-compliance reporting feature.
DSA8, DSA1000, DSA1000A Spectrum Analyzers:
This Excel Macro transfers single trace data from the Rigol spectrum analyzer to an Excel spreadsheet. It is built using Excel 2010 and National Instruments VISA library.
Rigol DSA800 series spectrum analyzers have drivers for some of the most popular compliance software packages. This makes integrating a Rigol Spectrum Analyzer into your existing test systems even easier:
NOTE: These links are for third party systems. Please contact the original vendor with questions pertaining to system requirements.