Low Pass Filter Example: Difference between revisions

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[[File:SetQTGUIRangeValuesFrequency.png|500px]]
[[File:SetQTGUIRangeValuesFrequency.png|500px]]
Double-click the ''Signal Source'' block and enter ''frequency'' from the ''QT GUI Range'' variable:
[[File:EditSignalSourceFrequency.png|500px]]

Revision as of 22:17, 10 January 2022


This tutorial will describe how to use a low-pass filter in GNU Radio. The previous tutorial can be found here: Creating Your First Block

Begin by adding the following blocks to the GRC work space:

  1. Signal Source
  2. Low Pass Filter
  3. Throttle
  4. QT GUI Frequency Sink
  5. QT GUI Range

Connect the blocks in the following manner:

LPFTutorialFlowgraphStart.png

The QT GUI Range block will be used to control the frequency of the Signal Source block. Double-click the QT GUI Range block and edit the properties:

  • Id: frequency
  • Default Value: 0
  • Start: -samp_rate/2
  • Stop: samp_rate/2

SetQTGUIRangeValuesFrequency.png


Double-click the Signal Source block and enter frequency from the QT GUI Range variable:

EditSignalSourceFrequency.png