Signal and Spectrum Analyzers

Signal and spectrum analyzers are essential for testing and troubleshooting electronic devices across industries like engineering, medical, automotive, and telecommunications. These tools measure key parameters such as signal integrity, frequency, voltage, and current, ensuring optimal performance during development and production.

ValueTronics offers a wide selection of new and used analyzers from top brands like Keysight, Tektronix, Rohde & Schwarz, and B&K Precision. Our inventory includes signal, spectrum, network, audio, and impedance analyzers, providing reliable solutions for various testing needs.

Explore our collection to find the right analyzer for your application, or contact our team for expert guidance.

1734 products

Frequently Asked Questions

What is a Signal Analyzer?
A signal analyzer is an instrument used to measure and evaluate electronic signals, providing detailed insights into their frequency, amplitude, phase, and distortion. Engineers use signal analyzers to test RF and microwave signals, ensuring proper functionality in applications such as wireless communication, radar, and electronic circuit design. These devices help detect interference, analyze modulation characteristics, and verify compliance with industry standards.
What is a Spectrum Analyzer?
A spectrum analyzer measures the frequency content of electrical signals, displaying signal strength across a range of frequencies. Engineers use spectrum analyzers to detect interference, analyze signal distortion, and assess RF performance in applications like wireless communication, broadcasting, and radar systems. These tools help maintain signal integrity and compliance with industry standards by providing detailed frequency-domain analysis.
How do I determine the frequency range I need in an analyzer?
The frequency range you need depends on the signals you plan to measure. As a general rule, your analyzer should have a frequency range that extends beyond the highest frequency of your signal to provide accurate measurements. For RF and microwave applications, choosing an analyzer with at least 1.5 times the maximum signal frequency is recommended. If you're working with broadband signals or higher harmonics, a wider frequency range may be necessary.
What is the difference between a signal analyzer and an oscilloscope?
A signal analyzer examines signals in the frequency domain, measuring characteristics like frequency, amplitude, and modulation—ideal for RF and wireless testing. An oscilloscope, in contrast, displays signals in the time domain, showing waveform changes over time for circuit analysis and troubleshooting. The choice depends on whether you need frequency or time-based measurements.
What are the main types of spectrum analyzers?
Spectrum analyzers come in three main types:

Swept-Tuned Spectrum Analyzers: Scan a frequency range by sweeping a narrowband filter, ideal for general RF measurements.

Real-Time Spectrum Analyzers (RTSA): Capture and analyze signals in real-time, useful for detecting transient or intermittent signals.

Vector Signal Analyzers (VSA): Provide advanced modulation analysis, making them essential for modern communication systems.

Each type serves different testing needs, depending on the application and signal characteristics.
How accurate are analyzers?
The accuracy of an analyzer depends on factors like frequency range, resolution bandwidth, and internal calibration. High-quality analyzers from trusted manufacturers offer precise measurements with minimal error margins. Regular calibration and proper usage further enhance accuracy, ensuring reliable signal analysis for applications in RF testing, telecommunications, and circuit design.