Hello,
So here is a break down, I put together an audio system for research was not getting enough output from my speakers, so purchased an amp, and power supply to run the amp and presto good output and lots of noise.
I know DC power supplies can introduce a fair amount of noise into the signal and that is a possible source of my problem, but overlooking that for the moment and getting to my main question about a ground scheme.
So even if the power supply it's self is my main problem i still believe i have a ground loop and want to try and get my set up to a single point ground but need clarification on a few points.
1) basic run down of set up
PC with NI PCI card provides 2 signals to amp via BNC cables
PC is grounded via 3 prong plug to outlet
DC power supply powers car audio amp, positive terminal of PS to +12v on amp and neutral to the GND on the amp
PS grounded via 3 prong plug to outlet
From amp, speakers wires run to 2 speakers. amp grounded to PS neutral
OK,
The neutral of the power supply is likely grounded to its case and then run to earth via plug....right?
PC case grounded to earth via plug, (all BNC cables grounded to case and amp,
amp grounded to neutral of PS, (BNC's grounded to amp & PC)
So here are the questions,
Is neutral the same as ground on the DC PS, I know the neutral lead comes out of the center of the transformer but pretty sure it is the ground?
Could I eliminate plug grounds then take all case grounds to a star ground, then take star ground to earth?
Is there a better way?
And info greatly appreciated.
Thanks in advance
So here is a break down, I put together an audio system for research was not getting enough output from my speakers, so purchased an amp, and power supply to run the amp and presto good output and lots of noise.
I know DC power supplies can introduce a fair amount of noise into the signal and that is a possible source of my problem, but overlooking that for the moment and getting to my main question about a ground scheme.
So even if the power supply it's self is my main problem i still believe i have a ground loop and want to try and get my set up to a single point ground but need clarification on a few points.
1) basic run down of set up
PC with NI PCI card provides 2 signals to amp via BNC cables
PC is grounded via 3 prong plug to outlet
DC power supply powers car audio amp, positive terminal of PS to +12v on amp and neutral to the GND on the amp
PS grounded via 3 prong plug to outlet
From amp, speakers wires run to 2 speakers. amp grounded to PS neutral
OK,
The neutral of the power supply is likely grounded to its case and then run to earth via plug....right?
PC case grounded to earth via plug, (all BNC cables grounded to case and amp,
amp grounded to neutral of PS, (BNC's grounded to amp & PC)
So here are the questions,
Is neutral the same as ground on the DC PS, I know the neutral lead comes out of the center of the transformer but pretty sure it is the ground?
Could I eliminate plug grounds then take all case grounds to a star ground, then take star ground to earth?
Is there a better way?
And info greatly appreciated.
Thanks in advance