Antenna Kit with Active Loop Antenna

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ANK-910L Portable EMC Antenna Kit (9 kHz – 1 GHz, Active Loop Antenna) — Frequently Asked Questions

1. What is the Com-Power ANK-910L and what is it primarily used for?
The ANK-910L is a portable low-frequency EMC antenna kit covering 9 kHz to 1 GHz, distinguished from the ANK-310 by the addition of an AL-130R active loop antenna for the low-frequency H-field (magnetic field) band from 9 kHz to 30 MHz. This kit is the right choice when your testing requires magnetic-field emissions measurement in addition to standard E-field work. Common applications include CISPR 15 / EN 55015 lighting equipment, FCC Part 15 / Part 18 low-frequency H-field measurements, automotive low-frequency emissions, and industrial equipment with strong switching converters. The kit includes everything needed for pre-compliance or qualification-level testing below 1 GHz.

2. What is included in the ANK-910L kit?
• AL-130R Active Loop Antenna (9 kHz – 30 MHz, battery-powered with built-in preamplifier) — the distinguishing item for this kit
• ABF-900A Collapsible Biconical Antenna (30 MHz – 300 MHz)
• ALC-100 Compact Log-Periodic Antenna (300 MHz – 1 GHz)
• PAM-103 Low-Noise Preamplifier (30 MHz – 1 GHz)
• CGO-501 or CGO-505 Comb Generator (1 MHz – 1 GHz / 5 MHz – 1 GHz, customer option)
• PS-500 Near-Field Probe Set (H-field and E-field probes)
• Measurement cables (N-type and BNC) for a typical 3-meter radiated setup
• Compartmentalized rolling carrying case with custom foam cutouts and pull handle, airline-transportable
• Individual calibration certificates for each antenna and preamplifier (NIST-traceable)
Optional: AT-812 or AT-120 tripod (with or without ATC-812/ATC-120 tripod case)

3. What distinguishes the ANK-910L from the ANK-310 and ANK-910M?
All three kits cover similar frequency ranges but with different low-frequency antennas:
• ANK-310 (30 MHz – 1 GHz): no antenna below 30 MHz. Commercial EMC above the low-frequency threshold
• ANK-910L (9 kHz – 1 GHz): adds AL-130R active loop for 9 kHz – 30 MHz H-field measurement. Ideal for CISPR 15 lighting, FCC Part 18, automotive H-field, switching-converter debug
• ANK-910M (9 kHz – 1 GHz): adds AM-741R active monopole for 9 kHz – 30 MHz E-field measurement. Ideal for DO-160 Section 21 (airborne), MIL-STD-461 RE102 lower portion
The “L” in ANK-910L stands for Loop (H-field); the “M” in ANK-910M stands for Monopole (E-field). The two kits are mutually exclusive options depending on whether your standards call for magnetic-field or electric-field low-frequency measurement.

4. What is the AL-130R Active Loop Antenna and how does it work?
The AL-130R is a battery-operated active loop antenna covering 9 kHz to 30 MHz — compliant with CISPR 16-1-4 specifications for site surveys and H-field radiated emissions measurement. It consists of a shielded magnetic-field loop with an integrated low-noise preamplifier powered by internal batteries. The active design gives much better sensitivity than a passive loop at these low frequencies, without requiring an external power supply or preamplifier. The loop measures the magnetic (H-field) component of radio-frequency emissions, which is the dominant field component in the near-field of low-frequency sources.

5. Why measure H-field (not E-field) at low frequencies?
At frequencies below about 30 MHz, RF sources are typically in the near-field at practical test distances (3 m or 10 m). In the near-field, H-field and E-field are not related by free-space impedance (377 Ω) — the ratio depends on source geometry. Many low-frequency sources (switching power supplies, motors, transformers, induction heaters, fluorescent ballasts, LED drivers) are predominantly current-driven, producing strong H-field and comparatively weak E-field. H-field measurement via loop antenna catches these emissions that would be missed with an E-field-only setup. That is why CISPR 15 specifically requires H-field measurement of lighting equipment, and why FCC Part 18 KDB guidance emphasizes H-field for industrial RF equipment.

6. Which EMC standards and applications does the ANK-910L support?
• CISPR 15 / EN 55015 (lighting equipment radiated magnetic disturbance, 9 kHz – 30 MHz)
• FCC Part 18 (industrial, scientific, medical RF equipment, H-field measurements per KDB guidance)
• FCC Part 15 Subpart B (unintentional radiators across 30 MHz – 1 GHz E-field)
• CISPR 22 / CISPR 32 / EN 55032 (IT equipment and multimedia, 30 MHz – 1 GHz)
• CISPR 11 / EN 55011 (industrial, scientific, medical)
• CISPR 14-1 / EN 55014-1 (household appliances)
• CISPR 25 (automotive, includes 150 kHz – 30 MHz magnetic-field component)
• IEC 61000-6-3/4 generic emissions
• ANSI C63.4 (U.S. unintentional radiator methods)
• Site validation and CISPR 16-1-4 H-field site surveys

7. What does the AL-130R enable that the ANK-310 cannot do?
Several important measurements require H-field capability below 30 MHz:
• CISPR 15 lighting equipment compliance — the standard specifies loop antenna measurement; ANK-310 cannot perform this test
• Switching power supply debug at 100 kHz – 10 MHz switching harmonics, where the H-field near the SMPS is the dominant emission
• Motor drive and inverter troubleshooting at low-frequency switching fundamentals and harmonics
• Transformer and magnetic component characterization during design
• Automotive CISPR 25 low-frequency magnetic-field component
• Induction heater / welding equipment FCC Part 18 compliance
• MRI/medical magnetic field pre-screening of associated electronics
• Industrial RF heating equipment emissions
• Site survey and ambient magnetic environment characterization
If your work includes lighting products, switching converters, motor drives, induction equipment, or any application where low-frequency magnetic emissions matter, the ANK-910L is the correct kit.

8. How does the AL-130R compare with passive loop antennas like the AL-RE101?
• AL-130R (active, 9 kHz – 30 MHz): battery-powered with integrated preamplifier; optimized for commercial CISPR site surveys and low-level ambient measurements. Higher sensitivity than a passive loop at low signals. Compliance with CISPR 16-1-4
• AL-RE101 (passive, 30 Hz – 100 kHz): small close-proximity loop for MIL-STD-461 RE101 military magnetic emissions. No preamplifier or battery. Handles very strong near-field signals without saturation. Compliance with MIL-STD-461
Different standards, different frequency ranges, different test geometries — these are complementary rather than competing antennas. The ANK-910L includes the AL-130R because it targets commercial EMC; military programs requiring RE101 would purchase the AL-RE101 separately.

9. What are the other antennas in the ANK-910L (ABF-900A, ALC-100) for?
• ABF-900A Collapsible Biconical Antenna (30 MHz – 300 MHz): the standard VHF E-field antenna for commercial EMC. Near-omni in the plane perpendicular to its axis. Collapsible for portable transport
• ALC-100 Compact Log-Periodic Antenna (300 MHz – 1 GHz): directional UHF E-field antenna with higher gain than a biconical at UHF. Compact size for portable kit transport
Together with the AL-130R they give continuous coverage from 9 kHz (H-field) to 1 GHz (E-field) across all commercial EMC bands below microwave — one antenna swap at 30 MHz (from loop to biconical) and one more at 300 MHz (from biconical to log-periodic).

10. Why is the PAM-103 preamplifier included and when is it used?
The PAM-103 is a low-noise preamplifier covering 30 MHz – 1 GHz, used with the passive ABF-900A and ALC-100 antennas to boost the signal before cable loss. It is not needed with the AL-130R because the AL-130R has its own built-in battery-powered preamplifier. This is why the ANK-910L includes only one external preamplifier despite having three antennas — the active loop is self-amplifying. At 30 MHz – 1 GHz test distances of 3–10 meters, the PAM-103 can lower the system noise floor by 15–25 dB, the difference between detecting a marginal emission and missing it.

11. Who uses the ANK-910L and what real-world products does it test?
• Lighting manufacturers: LED drivers, LED lamps, fluorescent ballasts, HID ballasts, CFL, smart lighting (Zigbee, Matter, Bluetooth), commercial fixtures, signage, grow lights, UV lamps
• Industrial RF equipment: induction heaters, dielectric heaters, industrial welders, FCC Part 18 equipment
• Power electronics OEMs: switching power supplies, DC-DC converters, motor drives, inverters, solar inverters, battery chargers
• Automotive suppliers: CISPR 25 component testing including the 150 kHz – 30 MHz magnetic-field component
• Medical devices: low-frequency EMI pre-screening of patient monitoring and life-support equipment
• Consumer electronics: products with switching power supplies or motors (vacuum cleaners, hair dryers, blenders, etc.)
• EMC consultants: portable commercial EMC capability including H-field work
• Compliance labs: site validation, backup capability, customer-site testing
• Research and academia: EMC instruction including magnetic-field measurement

12. How does the ANK-910L compare with other Com-Power antenna kits?
• vs. ANK-310 (30 MHz – 1 GHz): ANK-910L extends coverage downward to 9 kHz with the AL-130R active loop. Pick ANK-910L over ANK-310 if you need H-field below 30 MHz (CISPR 15 lighting, FCC Part 18, switching-converter debug)
• vs. ANK-910M (9 kHz – 1 GHz, monopole): mutually exclusive choice. ANK-910L has an active loop (AL-130R) for H-field — commercial. ANK-910M has an active monopole (AM-741R) for E-field — military/aerospace (DO-160, MIL-STD-461)
• vs. ANK-318 (25 MHz – 18 GHz): ANK-318 extends upward to microwave; ANK-910L extends downward to 9 kHz. For both extremes, own both kits
• vs. ANK-140 (1–40 GHz): different frequency class; complementary for complete 9 kHz – 40 GHz coverage
For a complete commercial EMC setup covering H-field low-frequency through mmWave, combine ANK-910L + ANK-140 (some overlap in 30 MHz – 1 GHz is intentional redundancy).

13. What calibration and documentation comes with the ANK-910L?
Each component is individually calibrated with its own certificate:
• Active loop (AL-130R) — calibrated antenna factor vs. frequency, battery-operation verified
• Biconical (ABF-900A) — antenna factor vs. frequency in deployed configuration
• Log-periodic (ALC-100) — antenna factor vs. frequency
• Preamplifier (PAM-103) — gain and noise figure vs. frequency
• Comb generator (CGO-501 or CGO-505) — output levels at each comb line
• Near-field probes (PS-500) — calibration data where applicable
All calibrations are NIST-traceable. ISO 17025 accredited calibration is available on request. Annual recalibration recommended for maintained traceability.

14. What real-world scenarios benefit from the ANK-910L?
• Scenario 1 — LED driver CISPR 15 compliance: Lighting OEM needs to verify radiated magnetic disturbance per CISPR 15 before submitting for CE marking. AL-130R + measurement receiver catches the switching harmonic issue at 500 kHz before formal testing
• Scenario 2 — Switching power supply design debug: A 250 W AC/DC power supply shows strong emissions in the 100 kHz – 10 MHz range. AL-130R locates the dominant radiating region on the transformer; PS-500 probes narrow it to specific winding termination
• Scenario 3 — Industrial welder FCC Part 18: Induction welding equipment needs H-field emissions characterization per FCC Part 18 KDB. ANK-910L covers the full required band
• Scenario 4 — Automotive CISPR 25 sub-assembly: An EV charging module needs CISPR 25 testing including the 150 kHz – 30 MHz magnetic-field portion. AL-130R enables the full range of conducted/radiated measurements
• Scenario 5 — Offsite commercial pre-compliance: Consultant travels with ANK-910L as luggage to cover client products requiring both E-field and H-field testing below 1 GHz

15. What are the ANK-910L’s key design advantages?
• Complete 9 kHz – 1 GHz coverage including H-field and E-field
• AL-130R active loop antenna — CISPR 16-1-4 compliant, battery-operated, integrated preamplifier
• Collapsible biconical + compact log-periodic — full commercial VHF/UHF E-field coverage in portable form
• PAM-103 preamplifier for improved sensitivity with passive antennas
• CGO-501 or CGO-505 comb generator for test-chain verification
• PS-500 near-field probe set for EMI source localization
• Rolling carrying case with custom foam — airline-luggage compatible
• All required cables included for 3-meter radiated test setup
• Every component individually NIST-traceable calibrated
• All items available individually for replacement or upgrade
• Optional AT-812 tripod for proper antenna positioning
• 3-year standard warranty on component products
• Specifically designed for CISPR 15 lighting-equipment commercial compliance

16. When should engineers select the ANK-910L over other options?
Select the ANK-910L when any of the following applies:
• You manufacture or test lighting products requiring CISPR 15 / EN 55015 H-field compliance (LED drivers, lamps, ballasts, smart lighting, signage)
• You perform FCC Part 18 industrial/scientific/medical equipment testing where H-field measurements are required
• Your products include switching power supplies, motor drives, inverters, or transformers and you need to characterize or debug low-frequency H-field emissions
• You test automotive components per CISPR 25 including the 150 kHz – 30 MHz magnetic-field portion
• You perform consumer/industrial commercial EMC pre-compliance where the product’s emissions include low-frequency magnetic content
• You operate an EMC test lab needing portable H-field capability for customer-site or satellite work
Choose the ANK-910M instead if your application requires E-field measurement below 30 MHz (typically MIL-STD-461 RE102 or DO-160 Section 21). Choose the ANK-310 if you don’t need coverage below 30 MHz (lower cost). Choose the ANK-318 for 25 MHz – 18 GHz broadband commercial coverage without the low-frequency loop. Choose the ANK-140 for 1 GHz – 40 GHz microwave/mmWave coverage.