Advantest U3771 9kHz to 31.8GHz Spectrum Analyzer

The Advantest U3771 is a compact, high-performance spectrum analyzer designed for demanding signal analysis applications up to 31.8 GHz. Its portability, combined with robust 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.