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6.2GHz USB Realtime Spectrum Analyser

Powerful, Affordable, Portable

A full featured spectrum analyser for less that half the price of a conventional unit.

It weighs just .75 kg, takes little space on your bench, and fits easily in your hand, bag, pocket or tool belt.

  • 9 kHz to 6.2 GHz
  • 40 MHz real-time bandwidth
  • for comprehensive spectrum analysis, and options for common applications
  • Made in the USA
  • 3 year warranty included

Introduction - Full Featured Spectrum Analyser Power In Your Hand

Technical Overview



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 that is ideal for field, factory, or academic use.


Key Performance Specifications

  • 9 kHz to 6.2 GHz frequency range covers a broad range of analysis needs
  • +20 dBm to -160 dBm measurement range
  • Captures interference to ensure that you see problems first time, every time
  • Mil-Std 28800 Class 2 environmental, shock and vibration specifications for use in harsh conditions

Key Features

  • Full-featured spectrum analysis capability with included Tektronix SignalVu-PC™ software
  • 27 spectrum and signal analysis measurements standard
  • Options for mapping, modulation analysis, standards support, pulse measurements, and frequency settling
  • Real time Spectrum/Spectrogram display to minimize time spent on transient and interference hunting
  • Application programming interface (API) included for Microsoft Windows environments
  • MATLAB instrument driver for use with Instrument Control Toolbox
  • Streaming capture records long-term events


  • EMI/EMC Pre-compliance testing
  • Interference hunting
  • Maintenance, installation and repair in the factory or field
  • Value-conscious design and manufacturing
  • Academic / Education


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Watch Applications Videos 

RSA306B App Demo - Signal Hunting & Mapping RSA306 App Demo - EMI & RF Spur Searching
RSA306 App Demo - WLAN & SignalVu-PC RSA306 App Demo - FM Radio Demodulation
RSA306B Differences from RSA5000/6000

Product Review

  Silicon Chip magazine logo
  Si Chip RSA306 prod review image

What is your old spectrum analyser hiding from you?

Watch this video to see how Digital Phosphorus Technology, or DPX reveals signals that your old spectrum analyser might be hiding from you. DPX is a Tektronix patented acquisition mode that performs the hardware DSP processing and rasterizing of the samples into pixel information in order to reveal signal detail like never before. It gives a truly “live” view of the RF signals, with its colour-grading feature allowing users to see different signals at the same frequency, but separated by either time or power levels. You can literally see signals hidden beneath other signals!

SignalVu-PC Software

SignalVu-PC brings benchtop and field features to the RSA306B

The 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 for Bluetooth testing, WLAN testing, P25 compliance testing, pulse analysis and modulation analysis to configure the software for your application.


RSA306B with Free SignalVu-PC: Standard Capabilities


Spectrum analyzer

  Spans from 100 Hz to 6.2 GHz, 3 traces + math and spectrogram trace, 5 markers with power, relative power, integrated power, power density and dBc/Hz functions  

DPX Spectrum/Spectrogram

  Real time display of spectrum with 100% probability of intercept of 100 usec signals in up to 40 MHz span  

Swept DPX spectrum for unmatched spectrum measurements across the entire 6.2 GHz frequency range


Amplitude, Frequency, Phase vs Time


Basic vector analysis functions


RF I and Q vs. Time


Basic vector analysis functions


Time Overview/Navigator


Enables easy setting of acquisition and analysis times for deep analysis in multiple domains




Analyze and re-analyze your signal in 2-D or 3-D waterfall display


AM, FM, PM analysis


Measures key AM, FM, PM parameters


AM/FM Listening


Hear and record to file FM and AM signals


Spurious Measurement


User-defined limit lines and regions provide automatic spectrum violation testing across the entire range of the instrument


Spectrum Emission Mask


User-set or standards-specific masks


Occupied Bandwidth


Measures 99% power, -xdB down points


Channel Power and ACLR


Variable channel and adjacent/alternate channel parameters




Complementary Cumulative Distribution Function plots the statistical variations in signal level



Upgrade RSA306B with More SignalVu-PC Applications

SignalVu-PC Option


General Purpose Modulation Analysis



WLAN 802.11a/b/g/j/p/n/ac measurements (includes options CON, SV23, SV24 and SV25)



Playback of recorded signal files



Signal Classification/Survey



AM/FM/PM/Direct Audio Analysis



Settling Time (Frequency and Phase) Measurement



General Purpose Modulation Analysis



Advanced Signal Analysis (including pulse measurements)



Flexible OFDM Analysis



WLAN 802.11a/b/g/j/p measurement application



WLAN 802.11n measurement application (requires Opt. SV23)



WLAN 802.11ac measurement application (requires Opt. SV24)



Mapping and Signal Strength (Requires SignalVu-PC SVE)



APCO P25 measurement application



Bluetooth Basic LE TX SIG measurements



LTE downlink (eNB) RF measurements



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