Instruction manual

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Voltage Selector A mains voltage selector switch is located beneath the top cover of the

unit, adjacent to the AC mains connector on the circuit board. With

primary AC power disconnected, slide the red actuator with a small

screwdriver so that the proper mains voltage (115 or 230) is visible.

You must always install an appropriate fuse, and should check that the

rear-panel voltage/fuse designation is properly marked. It is factory

practice to cross-out the inappropriate designation with an indelible

black marking pen. You can remove this strikethrough with solvent to

redesignate.

BE SURE that the mains voltage selector setting and pri-

mary fuse value are appropriate for the mains supply before

plugging the 708 into the wall outlet.

Power Cord The detachable power cord supplied with the 708 is fitted with a

North-American-standard male plug. The individual cord conductors

are supposed to be color-coded in accordance with CEE standards:

BROWN = AC “HOT” BLUE = AC NEUTRAL GRN/YEL = GROUND

If this turns out not to be the case, we offer our apologies (cord vendors

vary) and advise that U.S. color coding applies:

BLACK = AC “HOT” WHITE = AC NEUTRAL GREEN = GROUND

RADIO FREQUENCY INTERFERENCE ( R F I )

Location Although we have anticipated that the 708 will be operated in close

proximity to high-power transmitters, you should exercise care in

locating the unit away from abnormally high RF fields.

Ground Loops In some installations a mains frequency or RF ground loop may be

formed between the input or output cable shield grounds and the AC

power cord ground. Use of a “ground-lifting” AC adapter should

remedy the situation, though the chassis ultimately must be returned

to earth ground for safety. Generally, being screwed-down in the

equipment rack will satisfy this requirement.

LINE INPUT AND INPUT RANGE SELECTION

Input

Connections

The Inovonics 708 has electronically-balanced (transformerless) left-

and right-channel PROGRAM LINE INPUTS. These are brought out to

a screw-terminal barrier strip on the rear panel and include chassis

ground connections for cable shields. Please note that the screw-

terminal barrier block can be unplugged from the chassis! This makes

initial connection easier and permits quick removal of the 708 from the

rack should maintenance ever be required.