Hi All,
i need some help I like to decode a fm radio station subcarrier
i try look and this video but can not sen to get the setting correct
thanks for any help
I use free VBCable as I found it better than pay VAC. Once installed, set it up to allow 192 kHz sampling.
(Note that very few FM broadcast stations now have subcarriers. They were more common in the past.)
1. Use HDSDR to tune the FM broadcast station in WFM mode ( and set the rate to 192 kHz in . Set the output to be VBCable input. Be sure to set the Bandwidth sampling rate to 192 kHz.
2. Set the input for SDR# to be the output of VBCable.
3. Use SDR# in NFM mode to tune the 67 or 92 kHz subcarrier. (A good signal is required.)
4. Set the output of SDR# to be your speakers.
You can often improve the signal by
As others mentioned, the U.S. ECPA of 1986 made it illegal to receive subcarriers of FM broadcast stations if not authorized by them. At that time pay services include PRN (Physicians Radio Network, Muzak, Farm news, etc. You will not find those there now. Today, sometimes subcarriers will carry another broadcast station but most of what is around today in some area of the US appears to be reading services for the blind. It did the same for studio-transmitter links and of course cell phones.