Advantest U3772 9kHz to 43GHz Spectrum Analyzer

The Advantest U3772 is a portable microwave spectrum analyzer delivering RF measurements across 9 kHz to 43 GHz. Engineered for field and laboratory use, it combines dual RF inputs with exceptional sensitivity - down to –139 dBm with pre-amplifier - and a 100 dB dynamic range. The instrument accommodates both low-frequency monitoring via RF Input 1 (9 kHz to 8 GHz) and millimeter-wave analysis through RF Input 2 (10 MHz to 43 GHz), making it ideal for microwave device manufacturing, satellite communication system maintenance, and field troubleshooting.

Technical Specifications

• Frequency Range: 9 kHz to 43 GHz (RF Input 1: 9 kHz to 8 GHz; RF Input 2: 10 MHz to 43 GHz)


• Sensitivity: –117 dBm at 34 GHz; DANL up to –142 dBm with pre-amplifier (RF Input 2, Band 1)


• Amplitude Range: +30 dBm to –123 dBm


• Maximum Input Level: +30 dBm (RF Input 1, Attenuator ≥10 dB, Preamp OFF); +13 dBm (RF Input 1, Attenuator 0 dB, Preamp ON); +10 dBm (RF Input 2, Attenuator 0 dB)


• Input Impedance: 50 ohms


• Amplitude Accuracy: ±0.8 dB (up to 3.1 GHz), ±1.0 dB (up to 8 GHz)


• Dynamic Range: 100 dB


• Resolution Bandwidth: 100 Hz to 3 MHz; 30 Hz to 3 MHz; selectable 1 Hz to 1 kHz


• Video Bandwidth: 10 Hz to 3 MHz


• Sweep Time: 20 ms to 1000 s (spectrum mode); 50 µs to 1000 s (zero span)


• Detector Types: RMS, Normal, Positive Peak, Negative Peak, Sample


• Reference Level Range: –140 to +40 dBm (RF Input 1)

Key Features

• Dual RF inputs optimize coverage across microwave and millimeter-wave bands


• Multiple measurement functions: ACP, OBW, harmonics (up to 10 orders), spurious detection, frequency counter, intermodulation analysis


• 6.5-inch color LCD display for real-time spectrum visualization


• Triple power supply: AC, DC, and battery operation for uninterrupted field deployment


• 50 Ω RF input with configurable attenuator and pre-amplifier settings

Compatibility & Integration LAN, USB, and GPIB interfaces enable remote control and data transfer to external systems and host computers.