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Diffstat (limited to 'sw/eval-clock-cw-tx/README.md')
| -rw-r--r-- | sw/eval-clock-cw-tx/README.md | 29 |
1 files changed, 27 insertions, 2 deletions
diff --git a/sw/eval-clock-cw-tx/README.md b/sw/eval-clock-cw-tx/README.md index 5a22503..c83d0ba 100644 --- a/sw/eval-clock-cw-tx/README.md +++ b/sw/eval-clock-cw-tx/README.md @@ -1,5 +1,5 @@ -CW TX firmware for eval-clock -============================= +CW TX firmware for eval-clock (2021) +==================================== Sends CW and FELDHELL https://www.qsl.net/zl1bpu/HELL/Feld.htm @@ -11,6 +11,31 @@ pios are different than on picardy: both Si5351 and display are on same i2c PB3 is PTTOUTn PB15 is CWOUTn +WSPR beacon (Added 2023) +------------------------ + +Let's try to make a WSPR beacon too. Transmit trigger happens with the USB message `wspr\n`, the message itself +is fixed at compile time. + +Centered on 10140.200 kHz plus/minus 100Hz, which is set by USB message too. + +From https://swharden.com/software/FSKview/wspr/ : +Each symbol represents a frequency shift of 12000 / 8192 Hz (1.46Hz) per symbol value giving four-level multi-FSK +modulation. The transmitted symbol length is the reciprocal of the tone spacing, or approximately 0.683 seconds, so the +complete message of 162 symbols takes around 110.6 seconds to send and occupies a bandwidth of approximately 6Hz. + +12000/8192 = 375/256 + +Transmission starts one second into an even UTC minute. + +HB9EGM JN36 1W is `75 1D C4 F7 A0 17 80`. Tones: + + 1, 1, 2, 0, 0, 2, 2, 2, 1, 2, 0, 0, 3, 3, 1, 0, 2, 2, 3, 2, 0, 1, 0, 1, 3, 3, 1, 0, 2, 2, 0, 0, 2, 0, 3, 2, 0, 3, 0, + 1, 2, 0, 2, 0, 2, 0, 3, 2, 1, 1, 0, 2, 3, 3, 0, 3, 0, 2, 2, 3, 1, 0, 3, 0, 2, 2, 0, 1, 3, 2, 3, 0, 3, 2, 3, 0, 1, 0, + 0, 3, 0, 0, 1, 2, 1, 3, 0, 2, 2, 1, 3, 2, 3, 0, 3, 2, 0, 0, 3, 2, 0, 0, 0, 2, 3, 2, 0, 1, 2, 0, 1, 1, 1, 0, 3, 1, 2, + 2, 1, 1, 0, 3, 2, 2, 2, 1, 1, 1, 0, 0, 2, 2, 2, 3, 0, 3, 2, 2, 3, 3, 0, 0, 2, 2, 2, 2, 0, 3, 3, 0, 1, 2, 1, 3, 0, 0, + 0, 1, 1, 2, 2, 0 + Programming ----------- |