Simple Squelch

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Simple squelch block based on average signal power and threshold in dB. The output equals the input if the average input is >= the threshold, and zero otherwise.

The average is computed using a Single Pole IIR filter. It uses the magnitude squared for both averaging and for comparing to the threshold.


(R): Run-time adjustable

Threshold (R)
Threshold for muting.
Gain parameter for the running average filter.

Example Flowgraph[edit]

This flowgraph shows a Simple Squelch block in a working 2 meter receiver.

FunCube 2 meter NB FM fg.png

Source Files[edit]

C++ files
Header files
Public header files
Block definition