The Marconi IFR Aeroflex 54421-003J is an RF directional power head that measures forward and reverse power across 25 MHz to 1000 MHz. It delivers precise directional power readings and VSWR indication essential for RF power characterization. The unit employs compensated peak responding detectors to capture fast transients and maintain accuracy across a wide dynamic range, from 5 mW to 400 W depending on frequency band.
Technical Specifications
Frequency Range: 25 MHz to 1000 MHz
Power Measurement Capability:
• Forward and reverse power measurement
• Peak envelope power (PEP) for AM and SSB signals
• CW power measurement
• Maximum power handling: up to 100 W; 5 mW to 400 W (forward/reverse); 5 mW to 200 W at 1000 MHz
Measurement Accuracy:
• Power: ±3.6% (±0.155 dB) at 1–50 MHz; ±3.5% (±0.15 dB) at 100 MHz; ±4.7% (±0.2 dB) below 520 MHz; ±5.9% (±0.25 dB) at 520–1000 MHz; ±0.003% of maximum power head at 10 mW to 400 W (25–520 MHz); ±0.01% of maximum power head at 520–1000 MHz
• VSWR indication: 1.0 to 99.9
• VSWR temperature coefficient: <±0.3%/°C (1.1:1 to 2:1 VSWR); <±0.6%/°C (2:1 to 3:1 VSWR) outside 18–26 °C
Resolution:
• Power: 0.02 on 1–2.5 scales; 0.05 on 2.5–5.0 scales; 0.10 on 5.0–10.0 scales
• VSWR: <0.1 for ≤100 mW forward power; 100 mW forward power (typically 0.01)
Electrical Characteristics:
• Characteristic impedance: 50 Ω nominal
• Insertion loss: <0.05 dB (1–50 MHz); <0.35 dB (up to 520 MHz); <0.65 dB (520–1000 MHz)
• Insertion SWR: 26.4 dB)
– Key Features
• Compensated peak responding detectors for dynamic signal capture
• N-socket RF connectors
• 50 Ω system impedance with minimal insertion loss across band
• Supplied with 3 m DIN-to-connector lead assembly; 1 m assembly available separately
– Physical Characteristics
• Dimensions: 52 mm H × 108 mm W × 114 mm D
• Weight: 645 g
– Compatibility & Integration
Designed for integration with Marconi Communications Test Set 2955 series via DIN socket interface.
