Here's what I use.. Quick and simple, I have captured multiple stations using the FreeDV software.
For my normal setup I have a USB Jabra Speakerphone that has a headphone connector on it that I feed into the Rig Speaker connector of the SM1000. This allows me to then play back previously captured files, so I can see it on the waterfall of the FreeDV software, and then select the Analog option in FreeDV, so the RAW audio is fed to the SM1000. Walter/K5WH -----Original Message----- From: Stuart Longland [mailto:[email protected]] Sent: Saturday, September 19, 2015 7:29 PM To: [email protected] Subject: [Freetel-codec2] Testing the SM1000 firmware Hi all, What strategies do people use for testing the SM1000? I've had a report that the binary I built would not decode FreeDV 1600 signals. I just tried, and indeed, I could not get it, or the production binary, to decode a prepared signal sent from my laptop from the command line: My steps: $ sox ~/hamradio/projects/broadcast/vk4_warmup.mp3 -t raw -r 16000 -c 1 -b 16 -e signed-integer -L vk4-warmup.raw $ c2enc 1600 vk4-warmup.raw vk4-warmup.c2 $ fdmdv_mod vk4-warmup.c2 vk4-warmup.fdmdv $ sox -t raw -r 16000 -c 1 -b 16 -e signed-integer -L vk4-warmup.fdmdv -r 48000 -c 2 fdmdv.wav $ aplay -D hw:0,0 fdmdv.wav I used a cable to link the computer's output to the RIG SPKR jack on the SM1000. I ought to have heard the dulcet tones of Graham VK4BB announcing the times and frequencies of the WIA broadcast -- this is the recording that proceeds WIA News/QNews here in Queensland. Instead, I got mostly silence, save a few squawks from the SM1000. Is there some way that I can produce a reference FreeDV signal that the unit can decode? (The vk4_warmup.mp3 is from here: http://www.wiaq.com/ftp/vk4_warmup.mp3) -- Stuart Longland (aka Redhatter, VK4MSL) I haven't lost my mind... ...it's backed up on a tape somewhere. ---------------------------------------------------------------------------- -- _______________________________________________ Freetel-codec2 mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freetel-codec2 ------------------------------------------------------------------------------ _______________________________________________ Freetel-codec2 mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freetel-codec2
