Operating instructions

3-2c) GROUND LOOPS (continued)
CHASSIS
GROUND
FLOATING
ELECTRONIC
GROUND
Electronic
ground
Unbalanced source ground loop
A typical ground loop is formed when Electronic Ground is connected within the product to Chassis Ground. Unbalanced semi-pro
equipment is often built this way. Unbalanced equipment requires that Electronic Ground be connected through the audio signal
cable between the two pieces of equipment. The third prong of the AC power plug completes the ground loop. Lifting of the third prong
or insertion of an audio isolation transformer are the only ways to break the loop.
Shield ground loop
shield
Another typical ground loop is created when audio cabling has the shield connected at both ends between two pieces of equipment.
It doesn‘t matter whether the shield is connected to Chassis or Electronic Ground, it is incorrect. Correct procedure is for the shield to be
connected at ONE end only and that end should be the SOURCE equipment chassis. Remember, the only purpose for the
shield is to drain RF interference to ground away from Electronic Ground and any electronic components. That means that grounding
of the shield is only required at one end.
Arrakis Systems, inc. --- 6604 Powell st., Loveland, CO 80538 --- 970-461-0730 --- www.arrakis-systems.com
INSTALLATION PROCEDURES
GROUNDING (continued) 3-2)
3.8