kopia lustrzana https://github.com/robertostling/wspr-tools
37 wiersze
1.3 KiB
Markdown
37 wiersze
1.3 KiB
Markdown
# wspr-tools
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Code for the WSPR protocol
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## encode.py
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```python3 encode.py callsign locator power```
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Currently only simple callsigns and 4-symbol locators are accepted. Power is
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in dBm. This can be used directly for producing transmission sequences for the
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Arduino/AD9851 based transmitter below, or as a library to encode the WSPR
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protocol.
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## manual.py
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```python3 manual.py callsign locator power```
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Used to display the straight-key transmission sequence for a narrow-band
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frequency shift transmitter. Please refer to
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<a href="http://robos.org/sections/radio/wspr/">my web page on
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non-standard WSPR equipment</a> for more information.
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## arduino_ad9851.ino
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Arduino program to actually transmit the data generated by `encode.py` using
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an AD9851 module.
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**Note**: if you use the square wave output (QOUT1 or its inverse QOUT2),
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make sure to tune the comparator voltage to achieve a reasonable duty cycle.
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If followed by a class E amplifier this is about 45% for maximum power output
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(anywhere near 50% should be OK). I use a DC voltmeter and approximate the
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duty cycle with V/5, so that a measured 2V reading translates into a 40% duty
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cycle.
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You could of course also take either of the sine wave outputs (ZOUT1, ZOUT2)
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and amplify or feed directly into a low-pass filter to the antenna.
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