Advantest U4341N – RF Field Analyzer

The Advantest U4341N is a portable RF field analyzer engineered for spectrum analysis, signal monitoring, and interference detection across 9 kHz to 2.2 GHz. Built for field and laboratory deployment, it combines a 100 dB display dynamic range with a 20 dB internal preamplifier to resolve weak signals in complex RF environments. The instrument operates on 100/230 V AC, +10 to +16 V DC external power, or an integral detachable battery pack delivering approximately 2 hours of continuous operation with 1-hour recharge capability.

Technical Specifications

• Frequency Range: 9 kHz to 2.2 GHz


• Input Impedance: 75 Ω


• Display Dynamic Range: 100 dB


• Internal Preamplifier: 20 dB gain


• Power Supply: 100/230 V AC, +10 to +16 V DC external, or detachable battery pack


• Battery Runtime: Approximately 2 hours continuous operation


• Battery Charging Time: 1 hour (full charge)


• Weight: 6.8 kg or less (without battery); 9 kg or less (with battery)


• Display: 6-inch color TFT LCD with ±15° tilt mechanism


• Memory: Two standard JEIDA Ver. 4.1/PCMCIA Rel. 2.0 slots for panel settings and measured data storage


• Operating Temperature: 0°C to 50°C


• Storage Temperature: -20°C to +60°C


• Humidity: 85% or less

Key Features

• Reduced dB measurement function for controlled dynamic range analysis


• TDMA-TDD waveform observation with PHS-ID demodulator - single-slot burst capture (625 µs) with sweep times to 4.5 ms, ID trigger and ID marker functions for demodulated data (CI, CS-ID, PS-ID) and PHS channel frequency assignment


• TV demodulation function with simultaneous picture and sound output for direct waveform comparison


• Shoulder strap attachment for field portability


• Tiltable display for variable viewing angles

Typical Applications

• RF spectrum monitoring and characterization


• Electromagnetic interference (EMI) detection and localization


• PHS burst signal analysis in TDMA-TDD systems


• Television broadcast center and CATV uplink verification


• Signal presence and occupancy assessment across UHF, VHF, and microwave bands

Compatibility & Integration Two PCMCIA memory card slots enable rapid field data collection, off-instrument analysis, and configuration portability between units.