peebee
Electrical
- Jun 10, 2002
- 1,209
Just curious:
In lots of home audio-video equipment, there's no ground conductor in the power cord, no 3-prong plug.
Is there any signal reference? Are the signals ungrounded/isolated?
What happens when a signal connection is made to a different piece of equipment? Say it's a cable TV box -- does the cable TV system become part of a fault current path? Say it's a TV with a grounded plug -- does that become the ground reference for all equipment?
I'm used to older equipment with linear supplies and a solid ground bond. I have no idea how signals are referenced in newer equipment.
In lots of home audio-video equipment, there's no ground conductor in the power cord, no 3-prong plug.
Is there any signal reference? Are the signals ungrounded/isolated?
What happens when a signal connection is made to a different piece of equipment? Say it's a cable TV box -- does the cable TV system become part of a fault current path? Say it's a TV with a grounded plug -- does that become the ground reference for all equipment?
I'm used to older equipment with linear supplies and a solid ground bond. I have no idea how signals are referenced in newer equipment.