Difference between revisions of "Simple Squelch"

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(add Example Flowgraph)
(Add details: What is the output; what kind of filter is used. Also, added C++ link.)
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[[Category:Block Docs]]
[[Category:Block Docs]]
Simple squelch block based on average signal power and threshold in dB.
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.


== Parameters ==
== Parameters ==
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; C++ files
; C++ files
: [https://github.com/gnuradio/gnuradio TODO]
: [https://github.com/gnuradio/gnuradio/blob/master/gr-analog/lib/simple_squelch_cc_impl.cc]


; Header files
; Header files

Revision as of 19:38, 21 September 2021

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.

Parameters

(R): Run-time adjustable

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

Example Flowgraph

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

FunCube 2 meter NB FM fg.png

Source Files

C++ files
[1]
Header files
TODO
Public header files
TODO
Block definition
TODO