Marconi MkVIII Television Camera CCU rear connection panel
Most of the connections are self explanatory, except perhaps the "col sync & col step"
The MkVIII channel is meant to work with the Marconi picture and waveform monitor. These outputs drive the waveform monitor into a 3 step RGB display.
This is a very late production CCU serial number 623. Identity B-00-3217-04