Advantest U3751 9 kHz – 8 GHz Portable Spectrum Analyzer

The Advantest U3751 is a high-performance portable spectrum analyzer designed for RF signal analysis, interference detection, and wireless communication testing. Covering a wide frequency range from 9 kHz to 8 GHz, this analyzer is ideal for field and laboratory applications where precision and reliability are essential.

With its lightweight, compact design, the U3751 offers high-speed measurements, advanced analysis functions, and an intuitive user interface. It is widely used in telecommunications, aerospace, broadcasting, and EMI/EMC testing, making it a versatile solution for engineers and technicians working with RF systems.

Key Features & Benefits

1. Wide Frequency Range & High Sensitivity

• Covers 9 kHz to 8 GHz, suitable for wireless communication, radar, and broadcasting applications.
• Low noise floor and high dynamic range ensure accurate signal detection.
• Preamp function enhances sensitivity for low-level signal analysis.

2. Advanced RF Measurement Capabilities

• Occupied Bandwidth (OBW) and Adjacent Channel Power Ratio (ACPR) analysis.
• Carrier-to-Noise Ratio (C/N), Harmonic & Spurious Signal Detection.
• Peak & Average Power Measurements for precise signal evaluation.
• Fast sweep speeds enable real-time spectrum monitoring.

3. High-Resolution Display & User-Friendly Interface

• Large, high-contrast LCD display for clear spectrum visualization.
• Graphical menu-driven interface with soft keys for intuitive operation.
• Multiple marker functions for precise signal tracking.

4. Versatile Connectivity & Data Storage

• USB and LAN ports for external data transfer and remote operation.
• Optional GPIB (IEEE-488.2) interface for system integration and automation.
• Internal storage for saving measurement results and settings.

5. Rugged & Portable Design

• Lightweight and compact for easy transportation and field use.
• Durable construction for harsh industrial and outdoor environments.
• Battery operation enables extended use in remote locations.

Applications

• Wireless Communication & RF Testing – Network diagnostics and RF module verification.
• Broadcast & Spectrum Monitoring – Ensuring signal integrity in TV and radio transmission.
• EMI/EMC Pre-Compliance Testing – Detecting and analyzing electromagnetic interference.
• Aerospace & Defense RF Analysis – Signal analysis for radar and secure communication.
• Research & Development – RF component and system testing in laboratories.

The Advantest U3751 Portable Spectrum Analyzer delivers precision, versatility, and ease of use in a compact and rugged package. Whether used for field measurements or lab-based RF analysis, it provides accurate results and advanced features for a wide range of RF testing applications.

Specifications

General Specifications

• Model: Advantest U3751
• Type: Portable Spectrum Analyzer
• Frequency Range: 9 kHz to 8 GHz
• Resolution Bandwidth (RBW): 1 Hz to 3 MHz (adjustable)
• Video Bandwidth (VBW): 1 Hz to 3 MHz
• Phase Noise: -98 dBc/Hz @ 10 kHz offset (typical)
• Displayed Average Noise Level (DANL):
  • ≤ -150 dBm (typical, preamp off)
  • ≤ -165 dBm (typical, preamp on)

Frequency & Dynamic Range

• Frequency Span: 0 Hz (zero span), 100 Hz to 8 GHz
• Frequency Accuracy: ±1 ppm
• Amplitude Range: -150 dBm to +30 dBm
• Reference Level Range: -100 dBm to +30 dBm
• Amplitude Accuracy: ±0.7 dB (typical)
• Preamplifier: Built-in for enhanced sensitivity

Sweep & Analysis Features

• Sweep Time: 1 ms to 3000 s
• Trace Detector Modes: Normal, Peak, Sample, RMS
• Measurement Functions:
  • Channel Power, Occupied Bandwidth (OBW), Adjacent Channel Power Ratio (ACPR)
  • Harmonic & Spurious Measurements
  • Carrier-to-Noise Ratio (C/N)
  • Peak & Average Power Measurement
• Markers & Cursors: Multiple markers with delta measurement

Display & User Interface

• Display: Large high-contrast LCD screen
• Control Interface: Intuitive soft-key menu and graphical UI for easy operation

Connectivity & Data Storage

• USB Ports: USB Host & USB Device for data transfer and remote operation
• LAN (Ethernet): Standard for remote control and network connectivity
• GPIB Interface: Optional (for external automation and control)
• Data Logging & Storage: Internal memory for saving measurement results and settings

Power & Environmental

• Power Supply: 100V to 240V AC, 50/60 Hz
• Battery Operation: Yes (for portable use)
• Power Consumption: ≤ 50W
• Operating Temperature: 0°C to 50°C
• Storage Temperature: -20°C to 70°C

Physical Dimensions & Weight

• Dimensions: Compact and lightweight for easy portability
• Weight: Approx. 4.5 kg

Applications

• Wireless Communication & RF Testing
• Broadcast & Spectrum Monitoring
• EMI/EMC Pre-Compliance Testing
• Radar & Satellite Signal Analysis
• Aerospace & Defense RF Measurements
• General Research & Development