UCCS
Construction Documents
University Center AV Integration
February 8, 2012
SECTION 27 40 00 AUDIOVISUAL GENERAL REQUIREMENTS
PART 1 GENERAL
1.01 SUMMARY
A.
This Section provides supplemental information to Division 27 Specification Section Basic
Communications Requirements.
B.
Provide all labor, materials, equipment, tools and services required for the installation of the
Audiovisual Systems.
1.02 RELATED SECTIONS
A.
Division 27 Specification Section Common Work Sleeves, Penetrations and Firestopping.
Provide sleeves, penetrations, and firestopping as required to support the work of this Section.
B.
Division 27 Specification Section Common Work – Hangers and Supports. Provide hangers and
supports as required to support the work of this Section.
1.03 SUBMITTALS
A.
Provide the following per the criteria set forth for Submittals in Division 27 Specification Section
Basic Communications Requirements:
1.
2.
Product Data
Shop Drawings
1.04 RECORD DOCUMENTS
A.
Provide Record Documents per the criteria set forth for Record Documents in Division 27
Specification Section Basic Communications Requirements.
1.05 OPERATION AND MAINTENANCE MANUALS
A.
Provide Operation and Maintenance Manuals per the criteria set forth for Operation and
Maintenance Manuals in Division 27 Specification Section Basic Communications Requirements.
PART 2 MATERIALS
2.01 THIS SECTION NOT USED
PART 3 EXECUTION
3.01 GENERAL
A.
Work shall comply with the Governing Requirements as defined in Division 27 Specification
Section Basic Communications Requirements. Governing Requirements of particular relevance
to this Section include, but are not limited to:
1.
2.
IEEE C62.41: Recommended Practice for Surge Voltages in Low Voltage AC Power
Circuits
UL 1449: Transient Voltage Surge Suppressors
3.02 SOFTWARE IMPLEMENTATION
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A.
University Center AV Integration
February 8, 2012
The Contractor shall provide all software implementation as required to provide a fully functional
and operating system ready for the Owner’s use. Software implementation shall include but not
be limited to programming, configuration, modification, integration of other systems, integration of
exist systems, data entry and installation. Existing Audiovisual Systems shall be incorporated into
new/expansion systems, as required.
3.03 HARDWARE CONFIGURATION
A.
The Contractor shall provide all hardware configurations as required to provide a fully functional
and operating system ready for the Owner’s use. Hardware configuration shall include but not be
limited to firmware configuration, data communication, system settings, power distribution and
installation. Existing Audiovisual Systems shall be incorporated into new/expansion systems, as
required.
3.04 INSTALLATION
A.
Pathways: Prior to installation of Audiovisual cabling, Contractor shall verify conduit sizing and
quantity for correctness. Deviations from design documents shall be documented and Contractor
shall contact Engineer with notification of deviation.
B.
Cabling:
1.
Circuits shall be physically separated by metal raceway or by a minimum distance of six
inches when metal raceway is not applicable. Circuit separation shall be based upon signal
level:
i.
ii.
iii.
iv.
v.
vi.
2.
Audio circuits 20dBm or less – Microphone signal
Audio circuits 20dBm thru +20dBm Line level audio
Audio circuits +20 or above – Loudspeaker signal
Video circuits: 1 volt
Computer data circuits: 1 volt
Direct current power circuits: 1 – 24 volts
Cable pulls shall be conducted within the following requirements:
i.
ii.
iii.
iv.
Manufacturer’s guidelines for pulling tension and bend radii.
Circuit separation.
NEC conduit fill standards. The Contractor shall notify Engineer prior to cable
installation when the conduits are found to be undersized.
Any cable found to be faulty due to poor cable pull practices shall be removed and
replaced at no additional cost to Owner.
3.
Cable splicing shall not be considered a common installation practice. If necessary, splice
cables only in junction boxes or racks. Shielded cables shall not be spliced; instead each
end shall be terminated with an appropriate connector to maintain shield continuity. Any
cable found to be faulty due to splicing shall be removed and replaced at no additional cost
to Owner.
4.
The Contractor shall dress all cables at both ends with:
i.
ii.
iii.
5.
Black heat shrink where jacketing has been stripped away to expose the individual
conductors
Clear heat shrink around the exposed shield conductor (Coax excluded)
Printed, adhesive labels with clear heat shrink over each label
Contractor shall make all terminations with rosin core solder, crimp/compression type
connectors or captive screw type mechanical connections. For captive screw type
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mechanical connection, use spade type or ferrule type crimp connections. Bare wire
terminations are not acceptable.
C.
Equipment:
1.
2.
3.
4.
5.
Equipment shall be installed as indicated and specified, and in accordance with the
manufacture’s recommendations, except where local codes or regulations take
precedence.
Place equipment labels or other identification where the label or identification can be easily
seen and read without difficulty.
Equipment shall be installed level, plumb, parallel, and perpendicular to building structures
and to other building systems and components, except where otherwise indicated.
Equipment shall be securely fastened. Select fasteners and supports so that the load
applied to any one fastener maintains a minimum load factor of five.
Equipment locations: Prior to installation of Audiovisual equipment, Contractor shall
coordinate with other trades and subsequently verify all equipment locations that mount on
walls or within ceilings. This shall include but not be limited to:
i.
ii.
iii.
6.
7.
8.
9.
D.
Structural elements such as lighting devices, HVAC equipment, fire protection
devices, and cable tray
Structural support elements for ceiling mounted devices
Backing Board for wall mounted devices
Prior to head end equipment installation, contractor shall verify equipment rooms are free
of airborne contaminants.
After head end equipment installation, contractor shall protect equipment from any future
construction work that could cause damage to equipment, i.e. masonry, wood, paint,
plumbing, etc.
Prior to furniture work, Contractor shall coordinate with other trades and subsequently
verify all equipment locations that mount within furniture,
Contractor shall coordinate with architect as to any equipment color and finish
requirements.
Grounding:
1.
2.
Contractor shall follow accepted engineering practices when installing the Audiovisual
grounding system. The Audiovisual grounding system installation shall conform to NEC.
The Contractor shall be responsible for correcting any signal grounding problems within the
Audiovisual system (not Division 16 grounds) including but not limited to
electromagnetic/electrostatic hums, ground loop anomalies, and distortions.
A grounding buss bar shall be installed in each equipment rack. The copper buss bar shall
be sized to accommodate all connections plus future expansion.
i.
ii.
An insulated copper conductor properly sized shall bond the equipment rack buss bar
to the dedicated ground conductor provided by Division 16.
A “Star Type” grounding network shall be established within the equipment rack. All
Audiovisual components shall be grounded to this buss bar. Ground all components
according to the following methods:
1)
2)
3)
Equipment having a power cord without a grounding conductor connected to
chassis: furnish and install 14 AWG grounding conductor from component’s
metallic chassis to grounding buss bar within rack.
Equipment having a power cord with grounding conductor connected to
chassis: do not install an additional grounding conductor.
Physically isolate all rack mounted equipment from racks with isolation
washers.
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3.
4.
5.
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University Center AV Integration
February 8, 2012
Shielded audio signal cables shall have the shields terminated at one end only. The non
terminated shield conductor shall be trimmed to a length of 1/4 inch, folded back against
the cable jacketing and covered with black heat shrink.
All ungrounded equipment, such as microphones, shall have the shielding terminated at
both ends with only one end connected to ground.
All Video and Data shielded cables shall have the shielded conductors terminated on both
ends.
Structural Installations
1.
Structural support elements:
i.
Structural support elements are defined as those materials added to structure for the
reinforcement of general construction methods to meet a designed minimum load
factor of five. These include but are not limited to:
1)
2)
ii.
iii.
iv.
2.
Backing boards required for the support of Audiovisual equipment or cabling
Strut supports hung from structural beams or concrete slab
The Contractor shall provide all Audiovisual mounting and rigging equipment that
fasten to the structural support elements.
All support elements and fastenings shall be able to support a minimum load factor of
five times the total assembled weight.
The Contractor shall be responsible for the complete and correct installation of all the
Audiovisual equipment.
Hard Ceiling Loudspeaker Locations:
i.
ii.
iii.
Hard ceiling loudspeaker locations requiring trim rings, rough in brackets loudspeaker
back boxes shall be installed during conduit installation.
The Contractor shall install the trim rings, rough in brackets and back boxes for hard
ceiling locations in a timely manner, not to conflict with scheduled work of other
trades. In the event that this equipment is not installed in a timely manner, the
Contractor shall be responsible for all retrofit work and materials to provide a full
functioning speaker assembly.
It is the Contractors responsibility to coordinate installation with other trades.
3.05 TESTING
A.
Performance Standards
1.
Audio
i.
Electrical Requirements
1)
2)
3)
ii.
Frequency response: 20 Hz 20KHz at ±1.0 dB
Total harmonic distortion + noise: 20 Hz 20KHz at ±1.0 percent dB
Signal to noise ratio with crosstalk: minimum 55dB at 20 Hz – 20 KHz
Acoustical Requirements
1)
Sound pressure levels shall evenly cover the audience area without audible
distortions, hums, noise, rattles or buzzes.
a)
Nominal program material: 85 dB at ±2.0 dB with a minimum of 10 dB
above ambient noise.
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b)
c)
d)
2)
Frequency Response:
a)
b)
2.
Speech reinforcement: uniform response from 125 Hz – 2 KHz at ± 2 dB.
Below 125Hz, roll off 6 dB/octave. Above 2 KHz, roll off 3 dB/octave.
Program reinforcement: uniform response from 63Hz – 2.5 KHz ± 2 dB.
Below 63 Hz, roll off appropriate to loudspeaker specification. Above 2.5
KHz, roll off 3 dB/octave.
Video
i.
Electrical Requirements
1)
2)
3)
4)
5)
6)
7)
8)
ii.
Signal strength: minimum 70 I.R.E. with 100 percent SMPTE white reference
level.
Signal to noise ratio: minimum 55dB at 0 Hz 4.2 MHz
Crosstalk: minimum 45dB at 0 Hz 4.2 MHz
Frequency response: : ±0.5 dB at 0 Hz 4.2 MHz
Line and field tilt: 2 percent maximum
Differential gain: 3 percent maximum
Differential phase: 2 degrees maximum
Sync: 50 Jseconds maximum
Optical
1)
2)
3)
B.
Nominal speech material: 85 dB at ±2.0 dB with a minimum of 10 dB
above ambient noise.
Maximum sound pressure level: 100 dB at ±2.0 dB
Contractor shall make final loudspeaker sound pressure level
adjustments according to Owner’s recommendations determined during
acceptance testing.
The projection system including projection screen, projector and mirrors shall
be securely installed. No physical movement or vibration in projection system
shall be acceptable.
Projector light levels: ±15 percent output in lumens of projector specifications
Projector light coverage: ±20 percent uniform light coverage within all areas of
projection screen.
Operational Testing
1.
2.
Prior to system training and acceptance testing, the Contractor shall perform and document
operational testing.
Contractor shall assemble the following test equipment:
i.
ii.
iii.
Ground fault indicator
Digital Multi meter
Load resistors:
1)
2)
3)
iv.
Microphone load: 150 ohm, shielded, terminating resistors
Line load: 600 ohm, shielded, terminating resistors
Loudspeaker load: varies, match impedance measurements within 10 percent
Sine Wave Generator:
1)
2)
Continuously variable from 20Hz – 20kHz with level accuracy of 0.5dBu
Level Range: 35 dBu to 26 dBu.
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3)
v.
Pink Noise Generator
1)
2)
3)
vi.
vii.
viii.
ix.
x.
xii.
xiii.
xiv.
xv.
3.
Filters: ANSI compliant with 1/3 octave band filtering
Frequency range: 20Hz to 22Khz
Frequency accuracy: ± 0.5 dB, 20 Hz to 22kHz
Level range: 25 dB to 140 dB
Level accuracy: ± 0.1 dB
Distortion analyzer: THD minimum 0.02 percent with accuracy of 5 percent of
reading.
Video generator: SMTPE color bar, multi burst, and full white patterns
Light meter: measurements in foot candles and lux. Accuracy: 3 percent.
Waveform monitor
Vectorscope
Nominal test signals:
i.
Level
1)
2)
3)
ii.
Microphone level: 50dBu
Unbalanced line level: 10dBV
Balanced line level: +4dBu
Frequency:
1)
2)
4.
Noise frequency: 20Hz – 20kHz, 1/3 octave band filtered
Level Range: 35 dBu to 26 dBu.
Total Harmonic Distortion: 0.01 percent
Sound level meter meeting ANSI S1.4 specifications
Polarity tester
Impedance meter: Accuracy, 1 ohm – 8000 ohms, ±10 percent, 20Hz – 20kHz
Oscilloscope: minimum of 20 MHZ bandwidth
Real time spectrum or fast fourier transform analyzer:
1)
2)
3)
4)
5)
xi.
Total Harmonic Distortion: 0.01 percent
Full range frequency loudspeaker networks: 1000Hz sine wave
Crossover loudspeaker networks: apply a sine wave with a frequency centered
within the frequency band of the signal path under test.
Field Measurements:
i.
ii.
iii.
iv.
Prior to any connections being made to building power, Contractor shall use a ground
fault indicator to verify the circuits provided have proper ground wiring. Notify Owner
upon discovery of any faulty wiring. In no way is Contractor to perform any work on
any faulty electrical wiring discovered.
Contractor shall produce a checklist for the testing and documentation of all
Audiovisual equipment. Each device shall be verified for proper operation.
Contractor shall correct any defects upon discovery. Contractor shall notify and
coordinate with other trades to ensure all defects (including those by other trades that
affect the Audiovisual system) are corrected and put into working order.
Impedance testing: Measure and document impedance level of each loudspeaker
cable entering equipment rack.
1)
Full range frequency networks: measure impedance at 1000Hz.
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2)
5.
Crossover networks: measure impedance at center frequency for frequency
band of loudspeaker network under test.
Audio System Measurements
i.
ii.
iii.
The following procedures are the minimum requirements for this testing section.
These procedures are guidelines only; refer to listed reference material for testing
criteria. Manufacturer’s recommendations for operation and connectivity of specific
test equipment shall be observed for all testing procedures. Perform all applicable
procedures and document results.
Hum and noise testing: verify system is free of any hums, noises, buzzes,
oscillations, or any other anomalies contributing to poor system operation. Correct
any defects upon discovery.
System Gain Structure
1)
The system gain structure shall be configured in such a way as to maximize
dynamic range and provide a uniform clipping level across the entire audio
system.
a)
References:
i.
ii.
2)
3)
Contractor shall incorporate signal attenuation and gain devices as necessary
to achieve proper system gain structure.
Procedure:
a)
b)
c)
d)
e)
f)
g)
h)
4)
Set signal path gains to a minimum while still passing signal.
Set signal path processing equipment except bandpass filters to bypass.
Set signal path volume attenuators to minimum attenuation.
Connect a signal generator to the input of the signal path under test. Set
the signal generator to a nominal frequency and level for the signal path
under test. Set the input gain stage of the signal path under test to a
nominal operating level (0 dB VU or 18 dBFS).
Connect an oscilloscope to the final output of the signal path under test.
Terminate the output with a load resistor appropriate for the signal path
under test.
Adjust the signal generator level to a maximum level just below clipping
as measured on the oscilloscope.
Set all gain stages in the signal path to a maximum level just below
clipping as measured on the oscilloscope.
Perform this procedure for all signal paths in the audio system.
Documentation:
a)
b)
iv.
Pat Brown, “System Gain Structure”, Handbook for Sound
rd
Engineers 3 Ed., Glen Ballou, editor. (Focal Press, Boston,
2002).
John Murray, Sound System Gain Structure (ProSonic Solutions,
Woodland Park, CO).
Document the final level of the signal path under test as measured on
the oscilloscope for the signal path’s final settings.
Document the signal generator’s output level.
Amplifier Gain Structure
1)
The amplifier gain structure shall be configured in such a way as to provide full
amplifier gain at a maximum system input signal level just before clipping.
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a)
References:
i.
ii.
2)
Procedure:
a)
b)
c)
d)
e)
f)
g)
Set signal path processing equipment except bandpass filters to bypass.
Set signal path volume attenuators to minimum attenuation.
Set the amplifier input attenuator of signal path under test to maximum
attenuation.
Connect a pink noise generator to the input of the signal path under test.
Set the signal generator to a maximum system signal level just before
clipping for the signal path under test.
Terminate the loudspeaker network to the amplifier output of the signal
path under test.
Position a sound pressure level meter measurement microphone on axis
with the loudspeaker under test.
Adjust the amplifier input attenuation of the loudspeaker network under
test until one of the following conditions is reached:
i.
ii.
iii.
3)
Amplifier maximum output level: the point at which the amplifier
output signal begins to clip. Increase the amplifier input attenuation
to achieve an output level just below signal clipping.
Loudspeaker maximum sound pressure level: the point at which
further decrease of input attenuation has negligible effect upon the
loudspeaker’s sound pressure levels. Increase the amplifier input
attenuation to achieve the loudspeaker’s maximum sound pressure
level.
Acoustic maximum sound pressure level: the point at which the
loudspeaker sound pressure level measures the specified
maximum sound pressure level as defined in the performance
standards.
Documentation:
a)
b)
v.
Pat Brown, “System Gain Structure”, Handbook for Sound
rd
Engineers 3 Ed., Glen Ballou, editor. (Focal Press, Boston,
2002).
John Murray, Sound System Gain Structure (ProSonic Solutions,
Woodland Park, CO).
Document the amplifier input attenuation settings for the signal path
under test.
Document the sound pressure level of the loudspeaker under test.
Signal to Noise
1)
The signal to noise testing shall be conducted to determine the amount of
noise present in the audio system referenced to a nominal operating input
signal.
a)
References:
i.
ii.
2)
Bob Metzler, “Tools and Techniques”, Audio Measurement
Handbook (Audio Precision Inc., Beaverton, OR, 1993).
Dennis Bohn, RaneNote 145, Audio Specification (Rane
Corporation, Mukileto, WA).
Procedure:
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a)
b)
c)
d)
e)
3)
Documentation:
a)
b)
vi.
Set signal path processing equipment except bandpass filters to bypass.
Set signal path volume attenuators to minimum attenuation.
Connect a volt meter to the output of the signal path under test.
Terminate the output with a load resistor appropriate for the signal path
under test.
Connect a signal generator to the input of the signal path under test. Set
the signal generator to a nominal frequency and level for the signal path
under test.
Replace signal generator with load resistor appropriate for signal path
under test.
Document the level as measured on the volt meter with the signal
generator connected to the input of signal path under test.
Document the level as measured on the volt meter with a load resistor
connected to input of the signal path under test.
Frequency Response
1)
The frequency response testing shall be conducted to determine the bandwidth
of the audio system.
a)
References:
i.
ii.
2)
Procedure:
a)
b)
c)
d)
e)
f)
3)
Set signal path processing equipment except bandpass filters to bypass.
Set signal path volume attenuators to minimum attenuation.
Connect a signal generator to the input of the signal path under test. Set
the signal generator to a nominal frequency and level for the signal path
under test.
Connect a volt meter to the output of the signal path under test.
Terminate the output with a load resistor appropriate for the signal path
under test. Calibrate the volt meter to 0 volts.
Sweep the signal generator frequency from 20Hz to 20kHz.
Perform this procedure for all signal paths in the audio system.
Documentation:
a)
vii.
Bob Metzler, “Tools and Techniques”, Audio Measurement
Handbook (Audio Precision Inc., Beaverton, OR, 1993).
Dennis Bohn, RaneNote 145, Audio Specification (Rane
Corporation, Mukileto, WA).
Document all frequencies that deviate from the performance standards.
Total Harmonic Distortion + Noise
1)
The total harmonic distortion testing shall be conducted to determine the
linearity of the audio system.
a)
References:
i.
Bob Metzler, “Tools and Techniques”, Audio Measurement
Handbook (Audio Precision Inc., Beaverton, OR, 1993).
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ii.
2)
Procedure:
a)
b)
c)
d)
e)
f)
3)
Set signal path processing equipment except bandpass filters to bypass.
Set signal path volume attenuators to minimum attenuation.
Connect an oscilloscope to the output of the signal path under test.
Terminate the output with a load resistor appropriate for signal path
under test.
Connect a signal generator to the input of the signal path under test. Set
the signal generator to a nominal frequency for the signal path under
test. Set the signal generator to a maximum level just before clipping for
the signal path under test as measured on the oscilloscope.
Remove the oscilloscope and connect a distortion analyzer to the output
of the signal path under test.
Perform this procedure for all signal paths in the audio system.
Documentation:
a)
6.
Dennis Bohn, RaneNote 145, Audio Specification (Rane
Corporation, Mukileto, WA).
Document the distortion readings as measured on the distortion analyzer
for each signal path.
Acoustic Measurements
i.
ii.
iii.
iv.
The following procedures are the minimum requirements for this testing section.
These procedures are guidelines only; refer to listed reference material for testing
criteria. Manufacturer’s recommendations for operation and connectivity of specific
test equipment shall be observed for all testing procedures. Perform all applicable
procedures and document results.
Perform testing procedures as applicable for the audio system under test.
Hum and noise testing: verify the system is free of any hums, noises, buzzes,
oscillations, or any other anomalies contributing to poor system operation. Correct
any defects upon discovery. Contractor shall notify and coordinate with other trades
to suppress any structural vibrations and noises cause by audio system.
Polarity
1)
Polarity testing shall be conducted to determine the phase discrepancies within
the sound system cabling.
a)
References:
i.
ii.
2)
Bob Metzler, “Tools and Techniques”, Audio Measurement
Handbook (Audio Precision Inc., Beaverton, OR, 1993).
Gary Davis and Ralph Jones, “Sound System Test Equipment”,
nd
Yamaha Sound Reinforcement Handbook, 2 Ed. (Hal Leonard
Publishing Corporation, Milwaukee, WI, 1989).
Procedure:
a)
b)
c)
d)
e)
f)
Set signal path processing equipment except bandpass filters to bypass.
Set signal path volume attenuators to minimum attenuation.
Connect the polarity test equipment to the signal path input under test.
Measure polarity on axis to the loudspeaker under test.
Correct any deficiencies upon discovery.
Perform this procedure for all signal paths in audio system.
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Loudspeaker Frequency Response
1)
The frequency response of the loudspeakers shall be configured utilizing the
audio system equalizers to provide an acoustic frequency response as defined
within the Performance Standards section.
a)
References:
i.
ii.
2)
Procedure:
a)
b)
c)
d)
e)
f)
Set signal path processing equipment except bandpass filters and
system equalization to bypass.
Set signal path volume attenuators to minimum attenuation.
Connect a pink noise generator to the input of the signal path under test.
Set the pink noise generator to a nominal level for signal path under test.
Position the measurement microphone at an optimal testing position for
loudspeaker under test.
Utilize a real time spectrum or fast fourier transform analyzer to measure
the frequency response of the loudspeaker under test.
Frequency Response Settings:
i.
ii.
g)
3)
Loudspeaker bandpass frequencies: set the bandpass filters to
achieve frequency response as specified in the performance
standards.
Loudspeaker equalization: set equalization to achieve frequency
response as specified in the performance standards.
Perform this procedure for all loudspeaker networks in audio system.
Documentation:
a)
vi.
Chris Foreman, “Sound System Design”, Handbook for Sound
rd
Engineers 3 Ed., Glen Ballou, editor. (Focal Press, Boston,
2002).
John Murray, Sound System Equalization (ProSonic Solutions,
Woodland Park, CO).
Document the frequency response for all loudspeaker networks.
Loudspeaker Coverage
1)
The audio system shall be configured to provide uniform sound pressure levels
within the audience areas.
a)
References:
i.
2)
Chris Foreman, “Sound System Design”, Handbook for Sound
rd
Engineers 3 Ed., Glen Ballou, editor. (Focal Press, Boston,
2002).
Procedure:
a)
b)
Connect a pink noise generator to a system input. Set the pink noise
generator to a nominal level for the signal path under test.
Utilize a sound pressure level meter to measure the uniformity of the
loudspeaker coverage of the audience areas at listening heights.
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c)
3)
Documentation:
a)
7.
Correct any deficiencies in the loudspeaker coverage that deviate from
that specified in the performance standards.
Document deviations from that specified in the performance standards.
Video System Measurements
i.
ii.
The following procedures are the minimum requirements for this testing section.
These procedures are guidelines only; refer to listed reference material for testing
criteria. Manufacturer’s recommendations for operation and connectivity of specific
test equipment shall be observed for all testing procedures. Perform all applicable
procedures and document results.
Test all video signal paths with field connection points, field cabling and video
equipment in place.
1)
Multi conductor cabling:
a)
b)
iii.
iv.
Test all the conductors in the same manner as a single composite
conductor.
Document the worst performing conductor of the multi conductor cable.
Performance of the remaining conductors shall be assumed to exceed
performance of documented conductor.
Noise and distortion testing: During the following procedures, verify system is free of
any visual noises, oscillations, ground loop distortion or any other anomalies
contributing to poor system operation. Correct any defects upon discovery.
Insertion Gain
1)
The insertion gain test shall be performed to verify the amplitude continuity of
the video signal path.
a)
References:
i.
2)
Procedure:
a)
b)
c)
d)
3)
Connect a video generator to the input of the signal path under test.
Apply the “SMTPE color bar” test pattern.
Connect a waveform monitor to the output of the signal path under test.
Perform this procedure for all signal paths in video system.
Documentation:
a)
Document the following as measured of the waveform monitor.
i.
ii.
iii.
iv.
v.
v.
Tektronix, “Waveform Monitor Techniques”, The Basics, NTSC
Video Measurement (Tektronix Inc., Richardson TX).
White level.
Black levels.
Blanking levels.
Sync levels.
Sync pulse.
Frequency Response
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1)
The frequency response test shall be performed to verify the uniform amplitude
response as a function of frequency.
a)
References:
i.
2)
Procedure:
a)
b)
c)
d)
3)
Connect a video generator to the input of the signal path under test.
Apply the “multi burst” test pattern.
Connect a waveform monitor to the output of the signal path under test.
Perform this procedure for all signal paths in the video system.
Documentation:
a)
C.
Tektronix, “Waveform Monitor Techniques”, The Basics, NTSC
Video Measurement (Tektronix Inc., Richardson TX).
Document the amplitude level of each frequency burst packet.
Acceptance Testing
1.
2.
3.
4.
5.
6.
System acceptance testing shall not be conducted until all final “as built” drawings,
manuals and operational testing have been completed and the documentation has been
submitted for Engineer’s review.
Acceptance testing shall be conducted with Contractor, Engineer, and Owner in
attendance.
Contractor shall demonstrate that all components of the Audiovisual Systems are in proper
working order and are in accordance with specifications.
At time of acceptance testing, all items found to be outside of specification requirements;
Owner requirements, code requirements or general installation practices shall be added as
new items to the final Punch List. All items found outside of specification requirements shall
be put into working order prior to final acceptance of system.
The Contractor shall assemble an inventory of installed equipment. This inventory shall be
complied at time of acceptance testing and compared to equipment listed in contractual
documents.
Acceptance testing may be suspended by Engineer if Audiovisual Systems are not
complete and operable, equipment failure occurs, or installation is not in accordance with
specifications. Contractor shall be responsible for any cost incurred by Engineer for
additional site visits required to complete acceptance testing.
END OF SECTION
AUDIOVISUAL GENERAL REQUIREMENTS
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