WBFM Receive PLL: Difference between revisions

Latest revision as of 18:09, 22 August 2023

Hierarchical block for demodulating a broadcast FM signal.

The input is the downconverted complex baseband signal (gr_complex).

The output is the demodulated audio (float)

Compared to WBFM Receive, this one does a full stereo demodulation.

Deemphasis Tau: Deemphasis time constant (float) - typically 75e-6 (US) or 50e-6 (Europe)

This flowgraph shows the stereo version of the WBFM receiver. The flowgraph file can be found in https://github.com/gnuradio/gnuradio/blob/master/gr-analog/examples/USRP_FM_stereo.grc

@@ Line 15: / Line 15: @@
 ; Audio Decimation
 : How much to decimate quad_rate to get to audio. (integer)
+; Deemphasis Tau
+: Deemphasis time constant (float) - typically 75e-6 (US) or 50e-6 (Europe)
 == Example Flowgraph ==
-Insert description of flowgraph here, then show a screenshot of the flowgraph and the output if there is an interesting GUI.  Currently we have no standard method of uploading the actual flowgraph to the wiki or git repo, unfortunately.  The plan is to have an example flowgraph showing how the block might be used, for every block, and the flowgraphs will live in the git repo.
+This flowgraph shows the stereo version of the WBFM receiver. The flowgraph file can be found in https://github.com/gnuradio/gnuradio/blob/master/gr-analog/examples/USRP_FM_stereo.grc
+[[File:USRP_FM_stereo_pll.png|803px]]
 == Source Files ==