Cable for Yaesu FT-900

Audio signals in FT-900 can be found on 3.5mm TRS socket:

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Serial CAT control lines and PTT can be found on 6 pin MiniDin socket:

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The pinout cable for Digirig should be as follows:

3.5mm tip (DATA IN) → audio 3.5mm TRRS ring1 (RIG_AFIN)
3.5mm ring (DATA OUT) → audio 3.5mm TRRS tip (RIG_AFOUT)
3.5mm sleeve (GND) → audio 3.5mm TRRS sleeve (GND)

MiniDin6 pin 1 (GND) → serial 3.5mm TRRS sleeve (GND)
MiniDin6 pin 2 (SERIAL OUT) → serial 3.5mm TRRS ring 1 (RIG_TXD)
MiniDin6 pin 3 (SERIAL IN) → serial 3.5mm TRRS tip (RIG_RXD)
MiniDin6 pin 4 (PTT) → audio 3.5mm TRRS ring 2 (PTT)

From what I’m gathering from online sources, the serial port uses logic levels.

The link to the manuals can be found on this page.

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