Portsdown 4

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The Portsdown 4 system has been specifically designed to be used with the Raspberry Pi 4 and the official Raspberry Pi 7 inch touchscreen. No other models of Raspberry Pi or touchscreen are planned to be supported in the near future so please don't ask.

The Portsdown 4 can transmit DATV using a LimeSDR Mini and Receive DATV using a BATC MiniTiouner Mk2. Many of the legacy Portsdown features are also available, but have not been tested yet. The Portsdown 4 does not support the BATC Filter-modulator board or Ugly mode.

It is also compatible with the Langstone Microwave transceiver software, which can be loaded by from touchscreen selections (menu 2) AFTER the Porstdown software has been installed. To operate, the Langstone software needs a Pluto to be connected by USB.

There is experimental support for DATV transmissions from the Pluto using F5OEO's "for the brave" firmware build; currently only working with C920 webcam and test card modes. This is not yet documented.

You MUST start with a fresh build of Raspios Buster (NOT Raspbian), so you will need to rebuild any previous Langstone or Portsdown A27 card.

The build is on GitHub at https://github.com/BritishAmateurTelevi ... portsdown4.

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