Advantest U3641 Spectrum Analyzer (9 kHz – 3 GHz)

The Advantest U3641 is a high-performance spectrum analyzer covering a frequency range of 9 kHz to 3 GHz, designed for precision RF signal analysis in wireless communications, broadcasting, RF component testing, and general-purpose spectrum monitoring. This compact and portable analyzer delivers high accuracy, fast sweep speeds, and a user-friendly interface, making it ideal for both field and lab applications.

With advanced measurement functions, including occupied bandwidth (OBW), adjacent channel power ratio (ACPR), and spurious signal analysis, the U3641 ensures reliable performance for engineers and technicians working with RF and microwave systems. Its high-resolution color LCD, intuitive controls, and multiple connectivity options enhance usability, while its robust build ensures long-term stability and durability.

Key Features & Benefits

1. Wide Frequency Coverage (9 kHz – 3 GHz)

• Enables precise RF signal analysis across a broad spectrum.
• Supports wireless communications, broadcasting, EMI/EMC testing, and RF design validation.

2. High Accuracy & Dynamic Range

• Frequency Accuracy: ±1 × 10⁻⁶ / year
• Resolution Bandwidth (RBW): 300 Hz to 1 MHz
• Video Bandwidth (VBW): 10 Hz to 1 MHz
• Displayed Average Noise Level (DANL): < –110 dBm (typical)
• Spurious-Free Dynamic Range (SFDR): > 80 dB

3. Fast & Reliable Measurement Performance

• Fast sweep speeds ensure efficient signal analysis.
• Automatic signal detection and measurement functions optimize workflow.

4. Comprehensive Measurement Functions

• Occupied Bandwidth (OBW) for accurate spectral width assessment.
• Adjacent Channel Power Ratio (ACPR) for interference and transmission quality analysis.
• Harmonic & Spurious Analysis for signal integrity evaluation.
• Marker & Trace Functions for precise signal tracking.

5. Portable & User-Friendly Design

• Lightweight & compact for easy transport and field use.
• High-resolution color LCD with an intuitive graphical user interface.

6. Versatile Connectivity & Data Management

• GPIB & RS-232 interfaces for remote control and automated testing.
• Internal memory & external storage support for measurement data logging.

Applications

• Wireless Communication Testing – Cellular, Wi-Fi, and RF module testing.
• EMI/EMC Compliance Testing – Ensuring devices meet regulatory standards.
• Broadcast Signal Monitoring – TV and radio transmission quality assessment.
• RF Component & Circuit Testing – Filters, amplifiers, and antennas.
• General-Purpose Spectrum Analysis – Research, education, and production testing.

The Advantest U3641 Spectrum Analyzer is a versatile and accurate RF measurement tool suitable for laboratory, production, and field applications. Its wide frequency range, fast sweep speeds, comprehensive measurement functions, and user-friendly design make it an essential choice for RF engineers and technicians working in wireless communication, broadcasting, and RF component testing.

General Specifications

• Model: Advantest U3641
• Type: Spectrum Analyzer
• Frequency Range: 9 kHz to 3 GHz
• Tuning Resolution: 1 Hz

Frequency Characteristics

• Resolution Bandwidth (RBW): 300 Hz to 1 MHz (1-3 step selectable)
• Video Bandwidth (VBW): 10 Hz to 1 MHz
• Frequency Span: 0 Hz (zero span) to 3 GHz
• Frequency Accuracy: ±1 × 10⁻⁶ / year
• Phase Noise: < –85 dBc/Hz @ 10 kHz offset (typical)

Dynamic Range & Sensitivity

• Displayed Average Noise Level (DANL): < –110 dBm (typical)
• Third-Order Intercept (TOI): +10 dBm typical
• 1 dB Compression Point (P1dB): +5 dBm typical
• Spurious-Free Dynamic Range (SFDR): > 80 dB

Measurement & Analysis Features

• Occupied Bandwidth (OBW)
• Adjacent Channel Power Ratio (ACPR)
• Spurious & Harmonic Analysis
• Carrier-to-Noise Ratio (C/N)
• Peak & Average Power Measurements

Sweep & Triggering

• Sweep Time: 50 ms to 1000 s
• Sweep Mode: Continuous, Single
• Triggering: Free Run, External

Display & User Interface

• Display: High-resolution color LCD
• Markers & Cursors: Multiple markers for detailed signal analysis
• User Interface: Graphical, menu-driven with soft keys

Connectivity & Data Management

• Interfaces:
  • GPIB (IEEE-488.2) – For remote control and automation
  • RS-232C – For external communication
• Data Storage: Internal memory and external storage support

Physical & Environmental

• Form Factor: Benchtop / Portable
• Power Requirements: AC 100-240V, 50/60 Hz
• Operating Temperature: 0°C to 50°C
• Weight: Approximately 9 kg (19.8 lbs)
• Dimensions: 320 mm × 170 mm × 400 mm

Applications

• Wireless Communications Testing – RF module and network verification
• EMI/EMC Compliance Testing – Regulatory compliance testing
• Broadcast Signal Monitoring – TV and radio transmission quality assessment
• RF Component & Circuit Testing – Filters, amplifiers, and antennas
• General-Purpose Spectrum Analysis – Research, education, and production testing