AMX AXB-232 Plus plus Instrukcja Użytkownika Pobierz pdf (Strona 24)

OFPC Project No. 703-039 M.D. ANDERSON CANCER CENTER

Ambulatory Clinical Building

55050.00

AV BID AUDIO VISUAL SYSTEM

03/11/04 11738 -24

3. Cable in ceiling plenums to be run neatly parallel to building walls, supported every three feet to

structure.

4. Raceways - Run vertical wiring inside rack in Panduit (or equivalent) plastic raceways with snap-

on covers, sized to allow at least 50% future wiring. Mount raceways on full length ¾-inch flat

black plywood backboards, attached to rack sides. If between-rack wiring chases are provided,

Panduit raceways are not required. Horizontal wiring in rack to be neatly tied in manageable

bundles with cable lengths cut to minimize excess cable slack, but still allow for service and

testing. Provide horizontal support bars if cable bundles sag. Individually bundle excess AC

power cable away from rack mounted equipment with plastic cable ties. Electrical tape and

adhesive backed cable tie anchors are not acceptable.

5. Terminal Blocks - Connect wiring entering equipment racks via terminal blocks (Cinch 140 or 142

series). Leave terminal blocks fully exposed and labeled, mounted on ¾-inch plywood painted flat

black.

6. Accessibility - Ensure that wiring and connections are completely visible and labeled in rack.

Mount termination resistors, if required, on terminal strips, fully visible and not concealed within

equipment or connectors.

7. Loudspeaker Polarity - Connect loudspeakers electrically in phase, using same wire color for

loudspeaker wiring throughout project.

8. Physical Damage Prevention - Take necessary precautions to prevent physical damage to cables

and equipment. Damaged cables or equipment will not be accepted. Separate, organize, and

route cables to restrict channel crosstalk and feedback oscillation.

9. Hum Prevention - Ensure that electromagnetic and electrostatic hum is at inaudible levels. For

line level signals, float cable shields at the output of the source device. Do not cut or remove

shield conductors; fold back unconnected shields over cable jacket and cover with clear heat-

shrink tubing. Do not obstruct cable labels.

10. Other Connections - Make connections using rosin core solder or approved mechanical

connectors. Where spade lugs are used, crimp properly with ratchet type crimping tool. Solder

spade lugs mounted on #22 AWG or smaller cable after crimping.

3.2 INITIAL TESTS AND ADJUSTMENTS

A. Purpose - These tests are to ensure that system is ready for Final Tests and Adjustments (described

later).

B. Inspection - Verify prior to beginning actual tests and adjustments on systems.

1. Proper grounding of all electronic components (through third prong of power connector or

separate connection between component chassis and ground bus bar).

2. Cables dressed, routed, and labeled, connected with proper polarity.

3. Insulation and shrink tubing in place

4. Dust, debris, solder splatter, etc. removed

5. Proper frequency settings (or modules) at crossovers and controllers.

6. All equalizer bands and tone controls set for flat frequency response.

7. Test Instruments - Perform measurements using professional quality test equipment. Acoustical

measurement equipment shall be ANSI Standard Type 1 or IEC Precision Sound Level Meter set

for “slow” meter damping and flat response (unless otherwise indicated). Light measuring

equipment shall meet ANSI standards for measuring foot-candles.

C. Test Instruments - Perform measurements using professional quality test equipment. Acoustical

measurement equipment shall be ANSI Standard Type 1 or IEC Precision Sound Level Meter set for

“slow” meter damping and flat response (unless otherwise indicated). Light measuring equipment shall

meet ANSI standards for measuring foot-candles.

D. System Grounding Tests – While all sound/AV system power panel circuit breakers are turned off,

coordinate with Electrical Contractor to temporarily lift incoming main ground conductor from ground bus

in sound/AV system power panel. Measure and record DC resistance between the power panel ground

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