Page 21 DS8000 Operator’s Manual
Wordclock DC Ground Reference (Ground lift)
To minimise the introduction of mains frequency ground loops into the system when
connecting to the wordclock BNC, the ground on this connection is only coupled to the
internal ground at high frequencies (via a capacitor).
This assumes that the device at the other end of the cable has a mains ground reference. If it
does not then the link shown below on the digital option PCB can be fitted.
Default setting as shipped is ground lifted (HF coupled only).
A typical scenario where the ground link might be required would be if the device receiving a
wordclock from the DS8000 (or supplying a wordclock sync signal to the DS8000) has an
external DC supply or is USB powered from a laptop running on battery power — a high-end
USB soundcard for example.
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