In a spectrum analyzer what does resolution bandwidth mean?
Dr. Michael Simon, Application Support for Spectrum Analysis - Rohde & Schwarz
Jul 6, 2019
The Resolution Bandwidth (RBW) plays and important role in resolving signals that are close together in the frequency domain.
The RBW defines the bandwidth of the IF filter in a heterodyne receiver, and it controls the frequency resolution of the resulting spectrum – the smaller the RBW, the higher the spectral resolution, which means more peaks of frequencies are shown and distinguishable. If the resolution bandwidth is too broad, two frequencies can easily be combined into one and it can be difficult to tell them apart.
The RBW also defines the minimum sweep time, since smaller RBWs require longer sweep times, because narrow filter have longer settling times than wideband filters.
Typical resolution bandwidth values range from 1 Hz to 10 MHz.
Stay updated with the RF & Microwave Industry.
By signing up for our newsletter you agree to our Terms of Service and acknowledge receipt of our Privacy Policy.
By creating an account with us you agree to our Terms of Service and acknowledge receipt of our Privacy Policy.
Content submitted here will be sent to our editorial team who will review and consider it for publication on the website. you will be emailed if this content is published on everything RF.
Please click on the button in the email to get access to this section.