Dave wrote:

Its better to keep signal ground and screen separate... so generally I
use a core in a screened cable for signal ground, and save the screen
for its intended purpose.

I take it that one end of the cable has a flying braided lead to earth
the screen then?

On the 25 way connector pin 1 is reserved for screen, and pin 7 for
signal ground. The screen is also in theory paralleled with the shell of
the D connector.

--
Cheers,

John.

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