ATI Technologies SUM100 Manual de mantenimiento - Página 4

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company inspect the unit and the box at your location. Count the pieces! Don't

throw out the boxes and packing material until you are sure you have everything

that is coming to you. The amplifiers need either their own separately ordered

WA100 power supply or a DC cable, P/N20602-1 to share the supply of another

amplifier.

Rack and desk mounting hardware may be packed in with the unit even though

ordered separately. Wall mount power supplies must be ordered separately but

may either be included with the unit or shipped in their own box.

MOUNTING

Single desk mounting kits consist of a pair of angled base plates that mount

under the lower front and rear cover screws of a single unit, to raise and to tilt it

for easy use. In addition, one or more sets of vertical stacking plates, mounting to

the upper front and rear cover screws of the bottom unit, allow multiple units to

be stacked. Several units can be desk mounted side-by-side and even stacked

side-by-side using horizontal joiner kits together with mounting base and stacker

kits. P/N20617-501 is the angled base kit. P/N20617-502 is the base plus one

stacker kit (two high). P/N20617-503 is the base plus two stackers (three high).

P/N20617-504 is the stacker kit by itself and P/N20604-504 is a horizontal joiner

kit.

Rack mount system 21075-501 mounts three units in one rack.

WIRING

AUDIO CONNECTIONS

Balanced XLR type inputs and outputs are wired per figure 1 with pins 2 as HI

and pins 3 as LOW. Pin 1 is the cable shield and ground connection. Pin 1 is

grounded as shipped but may be floated to interrupt a hum producing ground

loop by opening the unit and clipping out the GND LIFT jumpers. Unbalanced

lines use pin 2 as HI and ground pins 3 and 1.

Active balanced outputs and inputs require a reference ground connection to the

source or receiving device for proper operation. This ground can be provided by

the rack frame or a studio buss connection if it is not carried through by the

output cable shield.

GROUNDING

Operation in high RF broadcast environments requires special attention to

grounding and shielding. The chassis must be grounded directly to a good, low

impedance studio ground system. Input and output connections must be properly

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