KAELUS is a Chinese company specializing in the field of RF test and measurement, renowned for its cost-effective products optimized for specific applications. The IQA901B is a high-performance vector signal analyzer introduced by KAELUS, designed to compete with mid-to-high-end products from international giants such as Keysight Technologies and Rohde & Schwarz.

Core Summary
The KAELUS IQA901B is a high-performance, wide-bandwidth test instrument that integrates vector signal analysis, spectrum analysis, and analog demodulation. It focuses on in-depth analysis of complex digitally modulated signals, capable of accurately measuring key metrics such as EVM (Error Vector Magnitude) and ACPR (Adjacent Channel Power Leakage). It is a powerful tool for the research, development, production, and validation of wireless communication equipment.

Key Features and Advantages
Wide Frequency Coverage

Frequency range typically covers 9 kHz to 6 GHz (specific models may vary; please refer to official documentation).

This range fully encompasses current mainstream wireless communication standards, including 5G NR Sub-6GHz, LTE, WCDMA, GSM, Wi-Fi 6/6E, Bluetooth, and more.

Excellent Analysis Bandwidth

Typically offers an analysis bandwidth of up to 160 MHz (some models or options may provide higher bandwidth).

Wide analysis bandwidth is crucial for analyzing broadband signals such as 5G NR and Wi-Fi 6/7, enabling the capture of entire channels or multiple carriers for signal quality assessment in a single acquisition.

Powerful Vector Signal Analysis Capabilities

High-precision EVM measurement: Excellent receiver performance allows for accurate EVM measurements of high-order modulation signals (e.g., 256QAM, 1024QAM), a core metric for evaluating transmitter quality.

Standard compliance: Built-in demodulation and analysis software for various wireless communication standards enables one-click compliance testing for signals such as 5G NR, LTE, WLAN 802.11 a/b/g/n/ac/ax, and Bluetooth.

Flexible custom demodulation: Supports user-defined modulation formats, filters, and other parameters for analyzing non-standard or proprietary communication protocols.

Comprehensive Spectrum Analysis Functions

Includes all functions of a traditional spectrum analyzer, such as channel power, occupied bandwidth, harmonic distortion, and spurious emissions.

Provides high dynamic range and low displayed average noise level, making it easier to detect weak interference signals.

Cost-Effectiveness and Localized Services

As a domestic brand, one of the biggest advantages of the KAELUS IQA901B is its competitive pricing while offering performance close to that of international brands.

Provides localized technical support and rapid after-sales response, reducing communication and time costs.

Main Application Areas
The IQA901B is widely used in various aspects of wireless communication:

Research, development, and production testing of wireless communication terminals

Used to test transmitter performance of devices such as smartphones, IoT modules, and CPEs.

Enables fast calibration and functional verification on production lines, improving test throughput.

Base station and network equipment testing

Analyzes output signal quality of macro and small cell base stations.

Performs network coverage and interference排查.

Chip and component testing

Tests linearity and signal distortion characteristics of RF integrated circuits, power amplifiers, filters, and other components.

Aerospace and defense

Analyzes modulated signals in satellite communications, radar, and electronic warfare systems (ensure frequency and bandwidth coverage meets application requirements).
The KAELUS IQA901B Vector Signal Analyzer is a masterpiece representing China's breakthrough in the field of high-end RF test instruments. It is not a simple imitation but integrates the core requirements of modern wireless testing, achieving an excellent balance between performance, functionality, and price.
Shenzhen Bao'an Shajing Fangfengrui Instrument Equipment Business Department is a company integrating electronic instrument sales, test solutions, pre-sales services, instrument equipment maintenance, instrument rental, recycling, and calibration services.