Abstract

The LISUN RFCI61000-6 series RF Conducted Immunity Test System is a comprehensive solution for electromagnetic compatibility (EMC) compliance testing, designed to evaluate equipment under test (EUT) against RF conducted disturbances. This system integrates a signal source, power amplifier, and power meter into a single chassis, supporting frequency ranges from 150 kHz to 230 MHz with output power variants of 35W and 85W. It enables manufacturers in LED, medical, power equipment, and industrial control sectors to validate immunity against conducted RF interference per IEC 61000-4-6 and EN 61000-4-6 requirements. The system supports multiple injection methods including coupling-decoupling networks (CDN) and electromagnetic clamp (EMC) probe techniques, ensuring comprehensive conducted disturbance compliance validation.

1.1 Integrated Signal Source Module

The RFCI61000-6 series employs a built-in signal generator capable of swept frequency operation from 150 kHz to 230 MHz with a resolution bandwidth of 1 kHz. The signal source provides precise amplitude control with an output level accuracy of ±0.5 dB across the entire frequency range. The internal modulation generator supports amplitude modulation (AM) at 1 kHz with 80% depth, matching the test requirements specified in IEC 61000-4-6 Clause 7.2 for conducted immunity testing. The system also includes pulse modulation capabilities for evaluating EUT susceptibility under transient conducted conditions, a critical requirement for power equipment and medical device compliance.

1.2 Power Amplifier Module and Output Variants

Two power variants address different test requirements: the RFCI61000-6-35W delivers 35W of continuous RF power, while the RFCI61000-6-85W provides 85W for higher-level immunity testing. Both variants maintain a voltage standing wave ratio (VSWR) of less than 1.5:1 across the operating bandwidth, ensuring minimal power reflection and stable injection levels. The amplifier module incorporates automatic level control (ALC) circuitry that maintains output power stability within ±0.2 dB during extended test sequences. This stability is essential for reproducible test results when evaluating EUT performance against conducted disturbance compliance standards.

1.3 Power Meter and Measurement Integration

The integrated power meter provides real-time forward and reflected power measurement with an accuracy of ±0.3 dB across the frequency range. The measurement module supports both average and peak power detection modes, enabling engineers to monitor injection levels during amplitude modulation testing. The power meter calibration is traceable to national standards, ensuring compliance with ISO/IEC 17025 requirements for test laboratory accreditation. This integration eliminates the need for external power measurement equipment, reducing test setup complexity and potential measurement uncertainties.

2.1 Coupling-Decoupling Network (CDN) Injection

The system supports all standard CDN types required for conducted immunity testing per IEC 61000-4-6 Clause 7.4. Compatible CDN models include CDN-M2 for mains power lines, CDN-AF2 for signal and control lines, CDN-T2 for telecom ports, and CDN-RJ45 for Ethernet connections. Each CDN provides a defined common-mode impedance of 150 ohms at the injection point, ensuring reproducible coupling conditions. The system automatically selects the appropriate injection level based on the CDN characteristics and the required test severity level, ranging from Level 1 (1V) to Level 4 (10V) for conducted disturbances.

2.2 Electromagnetic Clamp and Direct Injection Methods

For equipment where direct CDN connection is impractical, the system supports electromagnetic clamp (EMC probe) injection per IEC 61000-4-6 Annex C. The EMC probe achieves capacitive coupling to cable bundles without requiring physical disconnection of the EUT wiring. Direct injection methods using 100-ohm series resistors are also supported for testing individual ports or cables. The system automatically compensates for coupling losses associated with each injection method, maintaining the required test level at the EUT port as specified in EN 61000-4-6 Clause 7.2.2.

3.1 Frequency and Power Characteristics

The following table compares the key specifications of the two RFCI61000-6 series models against standard immunity test requirements:

Both models exceed the minimum power requirements for Level 3 testing (10V RMS) across all CDN types and support testing up to Level 4 (30V RMS) when using appropriate injection methods.

3.2 Modulation Capabilities and Test Sequences

The system supports all modulation modes required by conducted disturbance compliance standards including continuous wave (CW), 1 kHz amplitude modulation at 80% depth, and pulse modulation with adjustable duty cycles. The built-in test sequencer allows engineers to program frequency sweeps with defined step sizes (1%, 4%, or 10% of current frequency) per IEC 61000-4-6 Clause 7.3. Dwell times can be set from 100 ms to 10 seconds, accommodating different EUT response time requirements. The system automatically logs EUT performance at each frequency point, generating comprehensive test reports for compliance documentation.

4.1 Touchscreen Control System

The 7-inch color touchscreen interface provides intuitive control over all system parameters including frequency range, test level, modulation settings, and injection method selection. The graphical user interface displays real-time forward and reflected power levels, enabling immediate identification of power absorption events that may indicate EUT susceptibility. The interface supports both manual and automated test modes, with the automated mode executing pre-programmed test sequences according to selected standards. Engineers can save and recall up to 100 test configurations, reducing setup time for recurring compliance tests.

4.2 Automated Test Sequence Programming

The system includes a sequence editor that allows users to define complex test profiles incorporating multiple frequency sweeps, level changes, and injection method transitions. Test sequences can be programmed to include conditional branching based on EUT performance criteria, enabling efficient characterization of immunity thresholds. The system supports external control via USB and Ethernet interfaces, allowing integration with automated test environments. The software provides pre-defined test templates for IEC 61000-4-6, EN 61000-4-6, and GB/T 17626.6, reducing the learning curve for new users.

5.1 LED Manufacturing and Lighting Systems

Conducted immunity testing for LED drivers and lighting control systems requires injection levels up to 10V RMS across the 150 kHz to 80 MHz frequency range. The RFCI61000-6 series enables manufacturers to validate LED driver immunity against RF disturbances that may cause flickering, dimming errors, or complete failure. CDN-M2 coupling networks connect directly to the mains input of LED drivers, while CDN-AF2 networks test dimmer control lines. The system’s low VSWR ensures consistent injection levels even with reactive loads typical of switching power supplies in LED applications.

5.2 Medical Device EMC Compliance

Medical electrical equipment per IEC 60601-1-2 requires conducted immunity testing at Levels 2 and 3, with injection levels of 3V and 6V RMS respectively. The RFCI61000-6-85W model provides sufficient headroom for testing larger medical devices with multiple cable interfaces. The system’s CDN compatibility extends to medical-specific cable types including MDH (medical device housing) and MDI (medical device input) networks. The automated test sequencer supports the extended dwell times required for evaluating medical device performance under continuous RF exposure, as specified in IEC 60601-1-2 Clause 5.2.2.3.

5.3 Power Equipment and Industrial Controls

Power equipment including variable frequency drives, uninterruptible power supplies, and industrial controllers must withstand conducted RF disturbances per EN 61800-3 for adjustable speed power drive systems. The system supports injection on power lines, control cables, and communication interfaces simultaneously when using multiple CDN networks. The 85W output variant is particularly valuable for testing large industrial equipment where cable lengths exceed 5 meters, ensuring adequate injection levels despite cable attenuation. The system’s frequency extension to 230 MHz covers the extended immunity requirements for industrial environments with high-frequency conducted disturbances.

6.1 Power Level Verification Procedures

Regular calibration verification ensures system accuracy per ISO/IEC 17025 requirements for EMC test laboratories. The system includes a calibration port for connecting external power meters and spectrum analyzers to verify output levels. The integrated power meter can be cross-checked against a reference standard using the system’s self-test mode. The manufacturer recommends weekly verification of output power at three frequencies per decade using a calibrated RF power meter and 50-ohm termination. Any deviation exceeding ±0.5 dB requires recalibration of the power level correction table.

6.2 CDN Characterization and Impedance Verification

Each CDN must demonstrate a common-mode impedance of 150 ohms ±20 ohms across its specified frequency range per IEC 61000-4-6 Clause 7.4.2. The system supports automated CDN characterization using its internal power meter and impedance measurement functions. The verification routine measures the CDN’s insertion loss and phase response at defined frequency points, comparing results against stored reference data. CDN decoupling performance is verified by measuring the attenuation on the EUT and auxiliary equipment ports, which must exceed 60 dB at frequencies below 80 MHz. These verification procedures ensure consistent injection conditions across different test setups and time periods.

7.1 Multi-Level Immunity Characterization

The system supports comprehensive EUT characterization by automatically executing tests at multiple severity levels within a single session. Engineers can program level sequences from Level 1 (1V) through Level 4 (30V) with automatic level transitions at each frequency point. This multi-level approach identifies the precise immunity threshold of each EUT interface, providing design engineers with actionable data for filter optimization. The system generates three-dimensional plots showing EUT performance as a function of both frequency and injection level, facilitating root cause analysis of conducted immunity failures.

7.2 Extended Frequency Range and Pulse Testing

While standard conducted immunity testing typically covers 150 kHz to 80 MHz, the system’s extended range to 230 MHz addresses emerging EMC requirements for power line communication systems and smart grid equipment. The pulse modulation capability enables testing per IEC 61000-4-4 (electrical fast transient) and IEC 61000-4-5 (surge immunity) requirements when combined with appropriate coupling networks. The system’s fast settling time of less than 5 ms between frequency steps supports efficient testing of large frequency ranges without compromising measurement accuracy.

The LISUN RFCI61000-6 series RF Conducted Immunity Test System provides a complete, integrated solution for conducted disturbance compliance testing across multiple industries. The dual power variants (35W and 85W) accommodate test requirements from basic immunity screening to full Level 4 certification, while the integrated signal source, power amplifier, and power meter reduce equipment complexity and measurement uncertainty. The system’s compatibility with all standard CDN types, electromagnetic clamp injection, and direct injection methods ensures comprehensive coverage of conducted immunity testing scenarios per IEC 61000-4-6, EN 61000-4-6, and GB/T 17626.6. The automated test sequencer, touchscreen interface, and data logging capabilities enhance laboratory productivity while maintaining the measurement accuracy required for accredited EMC testing. For manufacturers in LED, medical, power equipment, industrial control, and communications sectors, the RFCI61000-6 series represents a versatile platform for validating RF immunity and ensuring product compliance with international EMC standards.

Q1: What is the difference between the RFCI61000-6-35W and RFCI61000-6-85W models for specific test applications?

A: The primary difference is output power capability, which directly affects the maximum injection level achievable. The 35W model supports testing up to Level 3 (10V RMS) with margin for most CDN injection scenarios, making it suitable for commercial equipment testing in LED, ITE, and consumer electronics applications. The 85W model provides additional headroom for Level 4 testing (30V RMS) and for applications with high cable losses, such as large medical equipment or industrial power systems with cables exceeding 10 meters. Both models share the same frequency range, modulation capabilities, and CDN compatibility, ensuring consistent test methodology regardless of power class. The choice between models depends on the maximum test level required by the applicable product standard and the physical characteristics of the EUT cable interfaces.

Q2: How does the LISUN system ensure compliance with IEC 61000-4-6 calibration requirements?

A: The system addresses calibration requirements through multiple mechanisms. First, the integrated power meter provides traceable power measurement with ±0.3 dB accuracy, enabling direct verification of injection levels at the CDN output port. Second, the system includes automated self-test routines that verify output power, frequency accuracy, and modulation depth against internal reference standards. Third, the CDN characterization function measures common-mode impedance and decoupling performance per IEC 61000-4-6 Clause 7.4.2. The system maintains a calibration log that records all verification dates and results, supporting your laboratory’s ISO/IEC 17025 quality management system. The manufacturer recommends full recalibration at 12-month intervals, with monthly verification checks using the system’s built-in diagnostic functions.

Q3: Can the RFCI61000-6 series test multiple EUT ports simultaneously?

A: Yes, the system supports simultaneous testing of multiple ports when used with appropriate CDN networks. However, standard practice per IEC 61000-4-6 Clause 7.3.3 is to apply the disturbance to one port at a time while monitoring all other ports for functional degradation. The system’s automated test sequencer can be programmed to test each port sequentially, switching between CDN networks using external RF relays. For multi-port testing, the 85W model provides sufficient power to compensate for distribution losses across multiple CDN networks. The system allows up to 8 ports in a single test sequence, with automatic power level adjustment for each port based on the CDN’s coupling factor. This sequential approach ensures accurate test levels while minimizing test time for complex EUTs with multiple cable interfaces.

Q4: What are the typical dwell time settings for conducted immunity testing with this system?

A: Dwell time selection depends on the EUT’s response characteristics and the applicable product standard. For most equipment per IEC 61000-4-6 Clause 7.3.1, a minimum dwell time of 1 second per frequency step is recommended for continuous monitoring. For medical devices per IEC 60601-1-2, dwell times of 3 seconds are typical to allow for physiological response times. The system supports dwell times from 100 ms to 10 seconds, adjustable in 10 ms increments. For initial screening, engineers often use 1-second dwell times with 4% frequency steps to complete a full frequency sweep in under 30 minutes. For certification testing, 3-second dwells with 1% steps provide thorough coverage. The system automatically logs all EUT performance data during each dwell period, enabling post-test analysis of intermittent failures.