On 02/15/2015 04:50 PM, Roger wrote:
On 11/02/15 13:58, David Christensen wrote:
On 02/10/2015 05:43 PM, Len Ovens wrote:
Right now there is a TS plugged directly into a TRS mixer
output which means the signal minus is grounded.
I wouldn't plug a TS cable into an balanced TRS output. First, you
are shorting one half of the balanced driver output circuit. Second,
you are injecting chassis ground noise into the audio circuits.
Agreed. If you run balanced -> unbalanced, it's probably best to run
shielded twisted core from the output and just leave the shield
disconnected at the input. It's discussed in those Rane docs I posted.
Those are good documents -- I finally finished reading through them last
night.
Some output driver circuits/ chips can handle shorting the signal
negative pin to the signal ground pin. Others cannot. If you are
certain your sending equipment can do this, then a custom cable might
work. If you're sending equipment cannot handle this, or if you are not
certain, then you either need an isolation transformer or a suitable
balanced-to-unbalanced converter circuit.
David
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