Advantest U3771 9kHz to 31.8GHz Spectrum Analyzer

The Advantest U3771 is a compact spectrum analyzer designed for demanding signal analysis applications up to 31.8 GHz. Its portability, combined with solid functionality, makes it suitable for both field and in-house use, catering to engineers and system integrators working with microwave and millimeter-wave technologies. The U3771 offers a two-channel display capability, allowing for simultaneous analysis of different signals, and incorporates an RMS detector for enhanced accuracy in modulated signal power measurements.

Technical Specifications Frequency Range:

• RF Input 1: 9 kHz to 8 GHz
• RF Input 2: 10 MHz to 31.8 GHz
• (With OPT.10 installed, RF1 is 10 MHz to 31.8 GHz, and RF2 is 9 kHz to 3 GHz) Sensitivity:
• Displayed Average Noise Level (typ.): -117 dBm @ 34 GHz
• Displayed Average Noise Level (typ., Preamp ON, RF Input 1): -141 dBm + 3f (GHz) dB (band 0), -142 dBm + 1.4f (GHz) dB (band 1)
• Displayed Average Noise Level (typ., RF Input 2): -124 dBm + 2f (GHz) dB (band 0), -123 dBm + 1.5f (GHz) dB (band 1), -114 dBm (band 2), -112 dBm (band 3), -108 dBm (band 4) Amplitude:
• Measurement Range: * RF Input 1: Displayed average noise level to +30 dBm * RF Input 2: Displayed average noise level to +10 dBm
• Maximum Safe Input Level: * RF Input 1 (Attenuator ≥ 10 dB): ±15 VDC max. * RF Input 1 (Preamp OFF): +30 dBm (Attenuator ≥ 10 dB) * RF Input 1 (Preamp ON): +13 dBm (Attenuator 0 dB) * RF Input 2: +10 dBm (Attenuator 0 dB), ±25 VDC max.
• Input Attenuator Range: * RF Input 1: 0 to 50 dB (10 dB steps) * RF Input 2: 0 to 30 dB (10 dB steps)
• Reference Level Setting Range: * RF Input 1: –140 to +40 dBm * RF Input 2: –140 to +20 dBm
• Scale Unit: dBm, dBmV, dBµV, dBµVemf, dBpW, W, V
• Dynamic Range: +30 dBm to -123 dBm
• Amplitude Accuracy: * ±0.8 dB (up to 3.1 GHz) * ±1.0 dB (up to 8 GHz) * RF Input 1: ±0.8 dB (10 MHz to 3.1 GHz), ±1 dB (3.1 to 8 GHz), ±1.5 dB (9 kHz to 10 MHz) * RF Input 2: ±0.8 dB (10 MHz to 3.1 GHz), ±1 dB (3.1 to 8 GHz), ±3.0 dB (7.8 to 14.573 GHz), ±3.5 dB (14.4288 to 28.0 GHz), ±4.5 dB (27.8 to 31.8 GHz for U3771)
• Log Scale Fidelity: ±0.5 dB/10 dB, ±0.5 dB/80 dB, ±0.2 dB/1 dB Resolution Bandwidth (RBW):
• Range: 100 Hz to 3 MHz
• Range (with OPT.70/71 installed): 30 Hz to 3 MHz
• Accuracy: < ±12% Video Bandwidth (VBW):
• Range: 10 Hz to 3 MHz Sweep:
• Sweep Time Setting Range: 20 ms to 1000 s (spectrum mode)
• Sweep Time Setting Range (zero span): 50 µs to 1000 s
• Sweep Time Accuracy (zero span): < ±2%
• Sweep Mode: Continuous, single, gated Detector Modes:
• Normal, Positive peak, Negative peak, Sample, RMS, and Average Interfaces:
• LAN
• GPIB
• USB
• Video Output
• External Trigger Input
• 21.4 MHz IF Output (with OPT.10 installed, supports RF Input 1) Physical:
• Mass: 6 kg or less (without option)
• Mass (with battery): 5.6 kg + 0.8 kg
• Dimensions (W x H x D): Approx. 308 x 175 x 209 mm (without protrusion)
• Dimensions (W x H x D): Approx. 337 x 175 x 307 mm (with feet and handles)
• Display: 6.5-inch color liquid crystal display (LCD) Power:
• AC Input Power Source: Automatic switching to 100 VAC or 200 VAC (100 to 120 VAC, 200 to 240 VAC, 50/60 Hz)
• DC Power Input: +11 to +17 VDC
• Power Consumption: 100 VA or less (AC operation), 70 W or less (DC operation)
• Power Supply: 3-way (AC, DC, Battery) Environmental:
• Operating Temperature: 0 to +50°C
• Storage Temperature: –20 to +60°C
• Operating Humidity: Relative humidity: 85% or less (without condensation)
• Storage Humidity: Relative humidity: 85% or less Options:
• OPT.10: 2 Channel Input (50 Ω, 3 GHz)
• OPT.20: High-stability frequency reference source * Reference Frequency Stability: Aging: ±2 x 10⁻⁸/day, ±1 x 10⁻⁷/year
• OPT.28: EMC filter
• OPT.53/54: Time-domain analysis (1 ch/2 ch)
• OPT.55/56: Wide-band time-domain analysis (1 ch/2 ch)
• OPT.70: High-purity spectrum analysis (1ch)
• OPT.76: Tracking generator (50 Ω, 3 GHz)
• OPT.77: Tracking generator (50 Ω, 6 GHz) Accessories:
• Battery pack
• Charger
• 75 Ω input impedance converter (ZT-130NC)
• DC power cable
• Carrying bag
• Transit case
• Rack mount kit (JIS/EIA)
• Filters for spurious measurement (various ranges) Why Choose Aumictech for the Advantest U3771 Spectrum Analyzer? At Aumictech, we specialize in supplying high-end spectrum analyzer equipment. Whether you need precise signal analysis, component testing, or demanding EMC measurements, our team ensures the Advantest U3771 delivers maximum performance for your application.