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.
