Hi all, I'm having an issue getting ATSC to decode and I was hoping someone who has done it successfully may have some pointers.
Here's the scenario.... Basic SDR antenna connected to an LNA4ALL feeding into an Airspy sampling at 10 MSPS using the attached flowgraph. I get a TS file and don't get any atsc_fs_checker error warnings while capturing, however the TS file doesn't decode with vlc, ffmpeg, or tsreport. All messages indicate it can't find the codec in the stream which would explain why it can't decode the packets. I've double-checked the local channel frequency (on HDTV ch 34 with a center freq of 593 MHz). The raw signal looks good as does the waterfall for an ATSC signal. I've tried capturing with and without the initial low-pass filter in the attached flowgraph, I've tried using a HackRF at 6.2 MSPS instead of the Airspy at 10 MSPS, tried a true HDTV antenna (although it's 75 Ohm), and horizontal and vertical polarizations on the standard SDR antenna to get the cleanest frequency plot with the best visual SNR. I get there can be some bad packets in any data stream, but for the life of me I can't figure out if there's no errors coming from the decoder and it's decoding successfullly (i.e. producing data with no warnings) why the stream isn't readable. Anyone have any suggestions? Thanks!
hdtv_airspy_receiveV2.2.grc
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