ec03e60342
input dbm from 0 -> 0.001 W to 60 -> 1000 W also apply "correction" because some values, es 1,2,4, etc are used by type 2 and type 3 messages. |
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.gitignore | ||
LICENSE | ||
README.md | ||
arduino_ad9851.ino | ||
encode.py |
README.md
wspr-tools
Code for the WSPR protocol
encode.py
python3 encode.py callsign locator power
Currently only simple callsigns and 4-symbol locators are accepted. Power is in dBm.
arduino_ad9851.ino
Arduino program to actually transmit the data generated by encode.py
using
an AD9851 module.
Note: if you use the square wave output (QOUT1 or its inverse QOUT2), make sure to tune the comparator voltage to achieve a reasonable duty cycle. If followed by a class E amplifier this is about 45% for maximum power output (anywhere near 50% should be OK). I use a DC voltmeter and approximate the duty cycle with V/5, so that a measured 2V reading translates into a 40% duty cycle.
You could of course also take either of the sine wave outputs (ZOUT1, ZOUT2) and amplify or feed directly into a low-pass filter to the antenna.