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EngineerGuy314 / pico-WSPRer

Minimalist WSPR tracker for pico-balloons utilizing Raspberry Pi Pico (or Rp2040) as the RF generator (aka The Cheapest Tracker In The World™). More info: [WIKI](https://github.com/EngineerGuy314/pico-WSPRer/wiki/pico%E2%80%90WSPRer-(aka-Cheapest-Tracker-in-the-World%E2%84%A2))
MIT License
38 stars 6 forks source link

version from Mai 5th - wont stop transmitting #12

Closed whallmann closed 4 months ago

whallmann commented 4 months ago

Hi Rob, your fresh repair about the frequency hopping looks very good. But there are some things i need your help. So the TX wont stop transmitting now. Is this ok? Callsign: DF7PN Suffix: - ID13: Q4 Minute 4 Lane: 3

Later i tried Suffix: 3 This doesn´t matter.

EngineerGuy314 commented 4 months ago

So the TX wont stop transmitting now. Is this ok?

not sure if technically that is "ok", but right or wrong it is by design.

I was seeing a measurable change in chip temperature as the transmissions started and stopped. I now keep the TX "idling" to keep the board temperature more uniform. This feature might no longer be needed, and might not even be legal. But I am going to keep it in the code for now.

Stopping the transmition was also causing a problem when testing with a resistive dummy load. Since the two outputs were antiphase, when it stopped one would be high and the other low, causing a large DC current drain into the load. Since the outputs are better at DC then RF, current consumption was actually INCREASING when the TX stopped.