Operating instructions

With ground loop
CART
MACHINE
3-2c) GROUND LOOPS
Modern audio consoles do NOT generate 60 or 120 cycle hum. Hum is caused by 60 cycle radiation from power supply transformers
located too close physically to electronic equipment (generally 1"-6") or by GROUND LOOPS!
A ground loop is a low frequency LOOP ANTENNA which picks up 60 cycles being radiated within the building from its AC power
distribution system. The loop is created when two pieces of equipment have more than one ground path between them.
THE WAY TO REMOVE THE HUM IS TO SIMPLY TO BREAK THE LOOP !!
CHASSIS
GROUND
FLOATING
ELECTRONIC
GROUND
No ground loop
CART
MACHINE
CHASSIS
GROUND
ELECTRONIC
GROUND
NOTE : A ground loop is created when chassis and electronic ground are connected in both pieces of equipment. This is generally
accomplished through the AC ground on the third prong of the AC power cord or by connecting the audio cable shield at both ends.
Arrakis Systems, inc. --- 6604 Powell st., Loveland, CO 80538 --- 970-461-0730 --- www.arrakis-systems.com
INSTALLATION PROCEDURES
GROUNDING (continued) 3-2)
3.7