aboutsummaryrefslogtreecommitdiffstats
path: root/sw/eval-clock-cw-tx/README.md
diff options
context:
space:
mode:
authorMatthias P. Braendli <matthias.braendli@mpb.li>2023-03-13 23:14:32 +0100
committerMatthias P. Braendli <matthias.braendli@mpb.li>2023-03-13 23:14:32 +0100
commite04fec33f079db4c5d42aa412f7b670784ec1b68 (patch)
tree3bed3e90faafcd3967dafae293277ad0b6dddd10 /sw/eval-clock-cw-tx/README.md
parentde7b4aa1b04e1fcb226c596c819b5ff996c73238 (diff)
downloadpicardy-e04fec33f079db4c5d42aa412f7b670784ec1b68.tar.gz
picardy-e04fec33f079db4c5d42aa412f7b670784ec1b68.tar.bz2
picardy-e04fec33f079db4c5d42aa412f7b670784ec1b68.zip
Add WSPR TX to eval-clock-cw-tx
Diffstat (limited to 'sw/eval-clock-cw-tx/README.md')
-rw-r--r--sw/eval-clock-cw-tx/README.md29
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
-----------