RSA306B USB Spectrum Analyzer

RSA306B USB Spectrum Analyzer

The RSA306B USB spectrum analyzer might be small but it packs a big punch. It’s loaded with features you’d expect from spectrum analyzers twice the size and twice the price. Perfect for everyday tasks. See all spectrum analyzers »

Maximum Frequency Range

9 kHz to 6.2 GHz

Capture Bandwidth

40 MHz

Dynamic Range

-160 dBm to +20 dBm


See more with proprietary DPX® technology


Discover the most difficult, hard-to-find problems with the powerful real-time architecture of the RSA Series. With the advanced DPX® technology, you can see RF characteristics that are practically invisible to a conventional spectrum analyzer.

Powerful and intuitive. Measurement insight at your fingertips.


The RSA Series is powered by SignalVu-PC Vector Analysis software – the same software used on the full-line of Tektronix Real-time Spectrum Analyzers. Delivering unlimited access to advanced measurement and analysis capabilities that you can save, customize or share with peers. Over 15 packages cover common wireless standards, spectrum management, pulse measurements and more.

Performance with no compromises.


The RSA Series provides performance to match conventional mid-range spectrum analyzers on the market. No compromises are required for even your toughest challenges.

Unequaled size. Unlimited flexibility. Unparalleled toughness.


At just 1.6 lbs., the RSA306B is conveniently sized for easy portability from your bench, the lab or even the field. It's powered by your laptop or tablet giving you the ultimate flexibility and convenience. You choose the display and connectivity that you prefer. Additionally, the RSA306B is tested to military standards and is field tough.

Watch the Extreme Test

Meet the Whole Family


The Tektronix family of Spectrum Analyzers are all made in the USA and have a 3 year warranty so you can count on our quality day in and day out. Choose the real-time spectrum analyzer that best suits your needs:

  • RSA500 Series: With a built-in tracking generator for antenna and cable test, and a GPS receiver to geo-locate and map signals, the RSA500 makes field test a lot easier.
    Learn More>>
  • RSA600 Series: With better dynamic range and phase noise for modulation analysis of wireless standards, and an optional tracking generator to characterize RF components, the RSA600 offers powerful tools for your bench.
    Learn More>>

Accidents happen. Make sure you're protected.

We have the only plan in the industry to offer coverage for accidental damage. Yes, this includes screen damage, spills, broken mounts, and electrostatic discharge or electronic overstress events. Reduce unplanned repair or replacement costs with our Total Protection Plan. Watch the video or click below to learn more.

Learn More


Model Frequency Range Real-Time Bandwidth Minimum Event Duration for 100% POI SFDR (typical) List Price
RSA306B 9 kHz to 6.2 GHz 40 MHz 100 μs 60 dBc
Configure & Quote
Model RSA306B
Frequency RangeReal-Time BandwidthMinimum Event Duration for 100% POI
9 kHz to 6.2 GHz40 MHz100 μs
SFDR (typical)
60 dBc

Spectrum Monitoring and Interference hunting

The migration to mobile communications is creating unprecedented pressure for more spectrum capacity in a complex and crowded signal environment. Tek’s Real-Time Spectrum Analyzers help you discover and examine sources of interference quickly so you can locate and identify unwanted activity. You can ensure your signal integrity and adherence to compliance standards using the RSA306B, RSA500, or RSA600 for real-time spectrum insights.

Detecting Drones Using a Real-Time Spectrum Analyzer


  • The RSA306B spectrum analyzer's proprietary DPX technology enables precise, real-time measurements packaged in a portable, rugged form factor and easy-to-use software interface.
  • The RSA306B spectrum analyzer covers up to 6.2 GHz, with 40 MHz bandwidth capture

Reduce manufacturing costs and test time with better test flexibility

The USB RSA’s are a great choice for manufacturers looking for greater throughput and product quality, all while controlling testing costs. The RSA 306B, 500, and 600 units offer support for major Internet of Things (IoT) standards in SignalVu-PC software, come with a complete offering of drivers and code examples, and include testing support for IoT technologies such as WiFi and the new Bluetooth 5.0.

Maximize your student’s learning

With our full featured and affordable Real-time Spectrum Analyzers, your students can capture results of experiments, perform analysis, and generate lab reports on their laptops, saving time and optimizing learning opportunities. It’s compact and portable size makes it easy to conduct experiments away from the lab in real world environments. 

EMI/EMC pre-compliance Testing

Save cost and precious time by performing pre-compliance testing in your lab with our Real-Time Spectrum Analyzers. You can use peak detection with a free version of SignalVu-PC. You also get more accurate results with quasi-peak and average detection by purchasing the additional option EMCVu. Learn more about EMI/EMC pre-compliance testing at our application page.

Model Frequency Range Real-Time Bandwidth Minimum Event Duration for 100% POI SFDR (typical) List Price
RSA306B 9 kHz to 6.2 GHz 40 MHz 100 μs 60 dBc
Configure & Quote
Model RSA306B
Frequency RangeReal-Time BandwidthMinimum Event Duration for 100% POI
9 kHz to 6.2 GHz40 MHz100 μs
SFDR (typical)
60 dBc
N9322C (BSA)
N9000-507 (CXA)
Maximum Frequency Range 9 kHz - 6.2 GHz 9 kHz to 7.5 GHz 9 kHz to 7.5 GHz 9 kHz - 7 GHz 9 kHz - 7.5 GHz
Capture Bandwidth 40 MHz 40 MHz 40 MHz 1 MHz Standard: 10 MHz
Optional: 25 MHz
Dynamic Range
(DANL to Max Imput)
-160 dBm to +23 dBm -161 dBm to +33 dBm -161 dBm to +33 dBm -152 dBm to +20 dBm -148 dBm to + 15 dBm (Optional Pre-amp On)
Phase Noise (1 GHz CF, 10 kHz offset) -84 dBc/Hz -94 dBc/Hz -94 dBc/Hz -90 dBc/Hz (typ) -102 dBc/Hz
Real Time Capabilities Yes Yes Yes No No
Base Measurements 17 17 17 6 10
Country of Origin USA USA USA Malaysia Malaysia
Warranty 3-year warranty 3-year warranty 3-year warranty 3-year warranty 3-year warranty
Weight 1.6 lbs 7.0 lbs 6.35 lbs 17.4 lbs 34 lbs
Size (h, w, d) 1.2" x 7.5" x 5" 2.65'" x 11.78" x 10.68" 2.95" x 14.12" x 8.75" 5.2" x 15.7" x 12.6" 7" x 16.8" x 14.5"

SignalVu-PC software brings benchtop and field features to the RSA306B


RSA306B operates with SignalVu-PC, a powerful program that is the basis of Tektronix performance signal analyzers. The software controls the spectrum analyzer acquisition and updates measurement displays continuously.

The base version ships free with the product; add options to configure the software for your application.


  • Free base version has 17 signal analysis and real-time spectrum analysis measurements
  • Paid add-on options for more than 15 advanced measurements including WLAN testing, P25 compliance testing, pulse analysis, modulation analysis and more


Smart antenna for interference hunting


When combined with a Tektronix USB spectrum analyzer, the Alaris DF-A0047 direction finding antenna, offered by Tektronix, makes interference hunting easy. Lines of bearing are automatically transmitted from the antenna to SignalVu-PC Map software, enabling fast triangulation on interference sources.


  • Multiple antennas and a user-selectable preamplifier cover a broad range of interference frequencies and levels
  • Integrated compass transmits angle information to SignalVu-PC for automatic creation of lines of bearing on the map
  • Powered by USB
Don’t fail EMC. Using the Tektronix Real-Time Spectrum analyzer with DPX ®technology, you can see signals under signals and signals under noise.
0h 5m 49s
Sometimes bad things happen to good scopes!  Ensure you've got it covered with a Total Product Protection plan from Tektronix, the only coverage plan available for test equipment with accident…
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Learn about the factors you should take into account when choosing the right wirelss RF module for your design. 
0h 25m 15s
Watch this video for a quick demonstration of the main features of DataVu-PC. 
0h 4m 4s
All Tektronix USB Portable Analyzers are tested to Military Standards but we wanted to see what they were really capable of. Could our spectrum analyzers survive a 1st story drop? A truck? A…
0h 2m 56s
In this video we compare EMI compliance results obtained using a full Compliance Receiver set-up versus a low-cost approach using a Tektronix RSA Spectrum Analyzer.
0h 10m 6s
Pass EMI Compliance the first time by pre-testing your Bluetooth device in your own lab, using a USB Real-Time Spectrum Analyzer and SignalVu-PC software.
0h 6m 23s
Learn how to test that your Bluetooth device is turning on and transmitted correctly, using a RSA607A real-time spectrum analyzer controlled by SignalVu-PC software.
0h 7m 27s
Watch this video to see how to perform a radiated EMI pre-compliance test, to ensure your device complies with the WLAN IEEE 802.11 standards, using the RSA607A and SignalVu-PC software.
0h 8m 33s
Advanced Radar Analysis: Tools for Measuring Modern Radar Application Note
With today’s rapid advances in radar technology, developing and manufacturing highly specialized and innovative electronic products to detect radar signals takes leading-edge technology and tools. Tektronix innovative test equipment reduces…
Literature number: 37W-23378-4
Application Note 06 Nov 2019
Automotive EMI/EMC Pre-compliance Tests
This application note provides an overview of measurement regulations and EMI pre-compliance procedures. Test setups for both radiated and conducted emissions are shown using the Tektronix RSA306B with EMCVu software.
Literature number: 37W-61461-0
Application Note 15 Aug 2019
Fast 3D EMC/EMI Scan with Detectus Scanning System and Tektronix Real Time Spectrum Analyzers
This customer case study reviews how the Eggtronic team used a Tektronix real-time spectrum analyzer to enable an extremely fast scan procedure without compromising on span and frequency resolution.
Literature number: 37W-61511-0
Case Study 15 Aug 2019
EMI Pre-Compliance Testing and Troubleshooting with Tektronix EMCVu
The purpose of this application note is to help product designers or EMC engineers learn enough basics of EMC and EMI so that the usual design failures are addressed early when costs and design is minimized.
Literature number: 37W-61518-0
Application Note 31 Jul 2019
Spectrum Analyzer
RSA306B USB Real Time Spectrum Analyzer Datasheet The RSA306B uses your PC and Tektronix SignalVu-PC™ RF Signal Analysis Software to provide real time spectrum analysis, streaming capture and deep signal analysis capabilities for signals from 9 kHz to 6.2 GHz, all in a low-cost, highly portable package
Literature number: 37W-60375-9
Low-cost EMI Pre-compliance Testing Using a Spectrum Analyzer
Learn about pre-compliance testing for the wireless standards and if you need it.
Literature number: 37A-60141-2
Application Note 31 Jul 2019
DPX Acquisition Technology for Spectrum Analyzers Fundamentals
This primer describes the DPX® spectrum display and how it addresses situations involving brief, intermittent, complex and/or coincident signals.
Literature number: 37W_19638_7
Primer 31 Jul 2019
Programmatic Control on Tektronix USB Real Time Spectrum Analyzers
This application note will explain the programmatic interfaces and environments available for Tektronix RSA USB spectrum analyzers and provide recommendations and examples for your applications.
Literature number: 37W-61459-0
Application Note 31 Jul 2019
Fundamentals of Real-Time Spectrum Analysis
Learn how real-time spectrum analyzers can find and solve RF problems faster.
Literature number: 37W-17249-6
Primer 31 Jul 2019
RSA Application Programming Interface - API for 64-Bit Windows - V3.23.0022
This release adds support for the RSA513A and 518A models. The RSA API is a Windows C/C++ DLL that provides direct access to RSA300/500/600 devices. It enables full control of the RSA and provides several forms of data and measurements to support custom…
Part number: 066169110
RSA Application Programming Interface - API for 32-Bit Windows - V3.23.0022
This release adds support for the RSA513A and 518A models. The RSA API is a Windows C/C++ DLL that provides direct access to RSA300/500/600 devices. It enables full control of the RSA and provides several forms of data and measurements to support custom…
Part number: 066176207
SignalVu-PC Vector Signal Analysis Software
Provides in-depth information on how to use the SignalVu-PC Vector Signal Analysis Software. This PDF version of the Help contains the most complete descriptions of how to use the base software and all of its optional applications.
Part number: 077072014
Online Help
SignalVu-PC Vector Signal Analysis Software - V3.23.0022
SignalVu-PC VSA software brings the analysis engine of the Tektronix Real-Time Signal Analyzer (RTSA) to your computer, enabling you to analyze live signals from RSA306, RSA500, RSA600, RSA7100A Spectrum Analyzers and MDO4000B/C Series oscilloscopes, and…
Part number: 066143422
RSA306B Series Real-Time Spectrum AnalyzerDeclassification and Security
This document provides instructions for declassifying and securing A RSA500A Series and RSA600A Series Real-Time Spectrum Analyzer.
Part number: 077124201
Detecting Drones Using a Real-Time Spectrum Analyzer
Flying drones can be fun. For RC and photography enthusiasts, a drone is a source of entertainment, and with a camera attached, provides breathtaking birds-eye views. For commercial and first responder purposes, a drone can be a valuable asset for…
Literature number: 37W-61576-0
Application Note 07 Jun 2019
SignalVu-PC Vector Signal Analysis Software
This document provides detailed information about the programming commands that can be used to remotely control the SignalVu-PC Vector Signal Analysis Software and connected instruments.
Part number: 077072114
Solutions for Aerospace and Defense
Military / Government BrochureFor over 70 years Tektronix has offered a range of electronic test and measurement solutions designed to address the unique needs of military and government applications. Learn more about our range of solutions in this brochure.
Literature number: 46A-61169-2
Brochure 03 May 2019
Multiple RSAs
Yes there are two options to communicate with multiple RSA's: Two USB RSA's can be controlled through the software DataVu-PC. DataVu-PC offers recording using two RSAs so that you can operate at two independent frequencies and spans simultaneously. One…
FAQ ID: 773771 15 Apr 2019
DataVu-PC Recorded Signal Analysis Software - V1.2.26
DataVu-PC analysis software for recordings makes short work of searching through large datasets for signals of interest. You can measure pulses and mark signals for export to other analysis programs, reducing time spent in post-capture analysis. Search…
Part number: 066190103
RSA306B and RSA306B-SMA Spectrum Analyzers Installation and Safety
These instructions describe installation and basic operation of the Tektronix RSA306B and RSA306B-SMA USB Spectrum Analyzers. It also includes safety, compliance, and environmental information for the instrument.
Part number: 071348301

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