For my experiment, I used Windows 10 Voice recorder connected to the motherboard sound card, and WJST-X connected to a USB sound card (that 'was' connected to my HobbyPCB RS-HFIQ).
?? MB Mic to USB Spkr and USB Mic to MB Spkr so no radio or anything, just cables between.
?? By using TX Next, then hitting "Record" at 119 seconds, I was able to successfully capture a type 1 and type 2 audio file at 1535 Hz audio with a good timing match.
?? The TX data was: KB8RCO, EN82cd, and 23.? I named the files KB8RCO_T1_23dB and KB8RCO_T2_23dB.
?? I successfully played each version back to WSJT-X at the proper timing (2-minute window) and each was properly decoded.
This was proof of concept, so the same could be done on any Linux machine with the proper apps. (WJST-x is available on Linux.?? So, only need a suitable audio recorder.)
Now that I have the 2 audio files, I will experiment with sending them over the air to be decoded.
KEYS:
> Volume setting for the playback to the radio and the radio mic gain adjustment to ensure the radio output is 23 dB.
> Timing so that the TX is done in the 2-minute window requirement.
This part I plan on doing on a Raspberry Pi - I don't have a QDX, but the concept should be proven.
--
Rob KB8RCO
