Yet Another Floater: DL4MDW-11

Launch in the early morning hours at full moon wih special guest Stefan (DK3SB). We’re testing a new AFSK modulation technique where the (rectangular) output of the micro controller is directly sent to the Si4464 chip through a GPIO pin. A digital (“GFSK”) filter inside the Si4464 is shaping the audio more smoothly. It seems however that several igates still have trouble decoding this signal. Only two solar panels seem to work fine (no difference to 4 panels). Time stamp issue from last flight is definitely fixed. GPS high altitude mode was verified to work with a GPS simulator.

Track DL4MDW-11 through APRS.fi or HABHUB

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2 thoughts on “Yet Another Floater: DL4MDW-11

  1. Hi

    TNX info, this technique (directly sent to the Si4464 chip through a GPIO pin) is usead by SP3OSJ too (soft by SQ5RWU).

    73 Tom

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