Serial tv lens control (B4, broadcast interface, hirose 10/12p)

Projects Networking, Protocols, and Devices
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I want to control a tv lens (fujinon XA20sx8.5BERM) as discussed here:

In my test setup i have a camera available: URSA Broadcast G2.

There is a specification document available which hopefully describes the lens protocol (DIGI POWER TV LENS SYSTEM, PROTOCOL L10 SPECIFIATIONS Ver.1.40)

According to this:
the serial interface of the lens is 38.400 baud, 8N1

What i've done:

  • i connected a oscilloscope to the pins 11 (lens tx) and 12 (lens rx) of the hirose connector of the lens to sniff the communication between camera and lens.

  • There is some serial communication on levels between 0 and 5V (TTL)!
    After some tests 38.400 baud, 8N1 seems the correct parameters.

But the bytes that i sniff are not matching to the documentation (mentioned above).
From camera side there is a initial command byte 0x0E, which is repeated until the lens responds.
In the following communication stream i cannot even find a structure matching to the specification.

Are there any ideas what to do out there?

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