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[Discuss-gnuradio] Re Stereo FM on USRP board with Basic RX board do not

From: Tushar Patel
Subject: [Discuss-gnuradio] Re Stereo FM on USRP board with Basic RX board do not able to catch signal.
Date: Sun, 25 Oct 2009 19:41:50 -0700

Hi Eric,
I tried simple FM receiver example in GNUradio (usrp_wfm_rcv.py) with USRP board, with Basic RX antenna.
I able to catch some station like 93.5 FM, but not getting clear sound, I heard noise too much.

Then I try to run stereo FM example made in GRC, 
- to understand a process I put FFT after quadrature_demodulator, but I notice
1.I could not get good signal after quadrature demodulator itself
2. do not able to see any pilot signal around 19Khz, or L-R signal around 23 to 53 Khz. and L+R signal aroud 0 to 15Khz.
I do not able to hear any thing.

but at same FM station(93.5M) in mono case I can here atleast some sound.

I attached my GRC block diagram for your reference, please guide me, where I am wrong.

Thanks and Regards
Tushar Patel


Attachment: stereo_fm.grc
Description: Binary data

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