Specifications
Table Of Contents
INTEGRATED AUDIO-VIDEO-CONTROL SYSTEMS
BeverlyHillsCityHall–TelevisionProductionAVCSystemsUpgrade
October15
th
,2012‐Page‐9
B. AV Contractor shall be available on site for the first formal use of the system as well as
instructing the Owner’s designated people during the pre-opening.
3.6 GENERAL PERFORMANCE REQUIREMENTS AND EXPECTATIONS
A. Reproduction of speech and music reinforcement shall be clear, of high fidelity, and with all
frequencies within range of system faithfully reproduced with no detectable noise, hum, or
distortion.
B. Reproduction shall be attained at sound levels sufficient to override noise levels typical for
performing arts centers, to provide a thoroughly satisfactory and serviceable system
C. Audio system shall be capable of continuous sound pressure levels of 95dB at the audience
position with no audible distortion and a frequency response from 55Hz to 20 kHz (+/– 3dB).
D. The Video systems shall be balanced within 3 dBmV at the origin point across the entire
video distribution. Each video monitor will have a uniform picture free of any noise, ghosting
or hum bars. Each video monitor shall receive a signal level between 5 and 10 dBmV.
3.7 FIELD QUALITY CONTROL
A. The AV Contractor shall maintain a competent project manager and supporting technical
personnel, acceptable to the Owner during the entire installation. Change of supervisor
during the project shall not be acceptable without prior written approval from the Owner.
B. Before connecting any equipment to electrical power outlets, AV contractor shall measure
and record the A.C. voltages between hot, neutral and ground to verify correct outlet polarity,
and record all findings. All high-voltage terminations shall be performed by others.
C. Physical inspection of the rack and field wiring shall be done by the Owner to insure neat and
orderly installation practices have been upheld.
D. Verify the performance parameters of the individual systems following established
professional procedures. The AV Contractor shall document all acceptance testing, include
the date the tests were performed, who performed the tests and the equipment used in
testing. Where discrepancies are found in testing, AV Contractor shall go back, fix the
discrepancy, retest all the affected areas and/or systems, and document the date, the new
test results, what was done to fix the problem, and the persons responsible for fixing and
retesting.
E. For audio testing the AV Contractor shall follow EIA standards RS160 and RS219, and make
all necessary corrections to bring systems into compliance. Testing shall include but is not
limited to:
F. Measuring all speaker line impedance at 250, 500, 1k and 2k Hz with loudspeakers
connected to each line. Turn all volume controls (where installed) to maximum setting before
testing.
G. Checking phasing on all speakers in every zone.
H. Correcting any variances for the entire zone and then retesting.
I. Testing all line and microphone (wired and wireless) level signals for polarity and continuity.
J. Verifying all video signals utilizing forward and reverse sweep and balance, hum modulation,
outlet levels at high and low channel of pass-band and complete comparison of calculated
values vs. observed values of tap outlets.