The EMCO 3121 is an adjustable element dipole antenna set engineered for precision EMI measurements, site attenuation testing per OST 55 and ANSI C 63.4, and radiated emissions characterization. Each unit is individually calibrated with actual calibration factors and Certificate of Conformance, delivering performance approximating a theoretically lossless dipole while improving upon conventional FCC balun designs.
## Technical Specifications
• **Type:** Adjustable element dipole antenna set
• **Antenna Elements:** Removable stainless steel construction with four extension rods, two low-frequency adjustable elements, and two medium-frequency adjustable elements
• **Balun Configuration:** Four compensated baluns (DB 1-4) with machined and fabricated non-corrosive metal construction
• **Cable Assembly:** 7.6 m (25 ft.) with N connectors; BNC available on request
• **Mounting:** Aluminum base with standard 1/4 in. × 20 male threads for tripod integration
• **Support Structure:** Delrin support rod and clamp block
• **Calibration:** Individual calibration with actual calibration factors; Certificate of Conformance included
• **Accessories:** High-frequency ruler for DB 4, 5-meter tape measure, shock-resistant carrying case, and technical manual
## Key Features
• Individually calibrated—each set includes actual (not typical or theoretical) calibration factors
• Adjustable element design accommodates multiple frequency ranges without element replacement
• Improved balun performance over legacy FCC designs
• Non-corrosive metal construction ensures field durability
• Complete measurement kit with integrated support accessories
## Typical Applications
• Site attenuation verification (OST 55, ANSI C 63.4)
• Radiated emissions testing and qualification
• Preclinical EMI characterization
• Field strength measurement campaigns
## Compatibility & Integration
Mounts to standard 1/4 in. × 20 tripod interfaces. Cable terminates in N connectors with BNC adapter option available. All calibration data and conformance documentation supplied with delivery.
