4.0 AUDIO VISUAL DESIGN STANDARDS & GUIDELINES
4.1 PURPOSE, CONTENT AND ORGANIZATION
OUSD implements educational technology and communications systems on its campuses to support education and to serve the campus community including the students, staff and administration. In broad terms the areas of focus of this document are design standards for Audio-visual systems, including Instructional Presentation Systems.
The purpose of this implementation standards document is intended to communicate and document the goals, issues, objectives and approaches to be used by persons with an interest in the implementation of Technology Programs for Oakland Unified School District including:
District Facilities Staff, including Program Managers
District IT staff
Site administration, operations and instructional personnel
District Facilities project managers
District Maintenance & Operations staff
Architectural Teams working on the design of new and modernization projects.
As such, the intent of this document addresses several audiences with differing interests.
4.2 TIMELINE FOR STANDARD
While the interior conduit and outside plant infrastructure as described in sections 1.0 & 2.0 of this document have intrinsically long useful lifespans, the communications cabling and equipment does not. AV hardware may be obsolete in as little as 5-7 years, and certainly in need of replacement due to incremental failure in a 10-12 year span. It is therefore expected that this document will need to be reviewed and updated at least biannually to ensure its continuing relevance to ongoing District construction.
4.3 GOALS
The principal goal of this document is to promote consistency in the implementation of technology based systems across the District’s sites. The reasons to do so are reviewed in the following summary sections.
4.4 PROMOTE STANDARDIZATION
A standardized implementation across all sites will yield several positive benefits:
Common capabilities
If all sites have a common core infrastructure, it becomes possible to easily roll out District wide programs or upgrades to the communications facilities, despite the infrastructure having been constructed by differing subcontractors. It is further possible to easily replicate successful programs in use at one site to other sites knowing that their physical facilities are similar.
Increased staff familiarity
A standard implementation will be easier for District level staff to maintain and troubleshoot. Instructional staff can also expect to transfer between sites and find similar capabilities available.
Reduced costs
By standardizing on common components, maintenance personnel and outside contractors serving the District will need to inventory fewer parts and pieces, thereby reducing their cost in responding. This is particularly important to Districtwide infrastructure systems that touch each campus and will need to be adjusted and updated by a common pool of District and outside systems (hardware) contractors.
Equity
Use of identical components at all sites promotes equity between sites. The purpose of the standard is to permit implementation of both best current practice today, but also to permit ready adaptation of the current implementation to new practices when and if the District chooses to do so.
This document will therefore seek to achieve the benefits outlined above by presenting the District’s staff and designers with a standard for implementing Audio-visual Systems and related aspects of implementation in a manner that is standardized across the District.
4.5 AUDIO-VISUAL IMPLEMENTATION
This section describes design standards related to design of audio-visual facilities for all campuses across the District including but not limited to; Auditoriums, Multi-Purpose rooms, classrooms, and conference rooms.
OUSD supports diverse spaces where formal and informal presentation facilities are required. Among these are:
Auditoriums and Theaters
Multi-Purpose Rooms (seat 50 to 120)
Standard classrooms (seat 21 to 49)
Small classrooms and conference rooms (seat 20 or fewer)
This section defines instructional presentation facility requirements for each of these spaces
4.6 INTEGRATED AUDIO-VIDEO SYSTEMS AND EQUIPMENT FOR SMALL VENUES
This section covers the requirements for a contractor to design, provide equipment for, and install a standard audio-visual system for classrooms, conference rooms, and other small venues. This is intended to supply a complete instructional technology classroom that can be arranged in multiple configurations. There will be a laser projector and screen or 82” monitor for the primary display. Screen size may vary depending on room size and should be approved prior to purchase and installation. All audio and image sources should be capable of being shown on the screen and heard in the classroom.
The work covered in this document consists of furnishing all labor, material and services necessary to install a complete audiovisual system as indicated on the project drawings and in these specifications.
Deliverables: Prior to ordering materials or commencing any construction activities, the contractor shall provide the owner with a complete bill of materials, including all quantities of components, devices, equipment, and wiring required to complete this work. Submit product data, including manufacturer’s data sheets for all proposed system components. Submit three copies with all specific items that will be provided clearly indicated and any options highlighted.
SYSTEMS DESCRIPTION
Provide a complete Audio-Visual System for small to medium sized classrooms and conference rooms. The system switching and audio amplification equipment shall be securely mounted and concealed in a ceiling mounted enclosure located in close proximity to the display. Audio and image source equipment can be connected to the system and displayed via active interface panels located in the area of the teacher’s station. The audio and image signals from source devices shall be transmitted from the active interface panels over XTP shielded twisted pair cabling architecture.
Classroom Definition
A classroom that has fixed instructional media video projection capabilities, Internet connectivity at the teacher’s station, student networking (usually wireless), a document camera, other multimedia input devices, current laptop interface, multimedia control system that is connected to the network and capabilities for additional add-on modular features.
Technology Enhanced Classrooms (TECs)
Use standardized control/interface systems and employ a standardized operational protocol. The principles of this recommendation are to establish desirable goals with respect to classroom design and installed technology. The TEC classroom standard includes control systems that comply with ADA, Section 508 through buttons that are discernible without activation and easily reached control panel locations. In addition, provisions shall be included for compliance with Section 504 of the Rehabilitation Act relating to closed captioning and hearing assistance. These combined with a user-friendly operator protocol are among the features that are consistent with universal design principles.
All new construction general purpose classrooms will meet this minimum standard. The standard will be met in major renovations wherever possible. The standard will be retrofitted in existing general-purpose classrooms according to an established upgrade plan.
GENERAL EQUIPMENT REQUIREMENTS
The room shall be equipped with an integrated audio video system. System control shall be provided by an easy to operate control panel located near the instructor area. The audio system may be monaural or stereo for voice and program sound. System parameters shall be capable of being monitored, administered and controlled over the data network.
Acceptable functionality requirements are listed below categorized by type of equipment. Quantities are listed for movable, portable or loose equipment, and other selected entries. Where quantities are not listed, refer to the system drawings.
The System components shall all be correctly listed and labeled by Underwriters Laboratories Incorporated (UL) for their intended use.
All products shall be new and under warranty at the time of installation. B-stock, previously installed, refurbished or used equipment shall not be provided on this project.
Where the specification lists several manufacturers for a major item, or group of items, the AV contractor shall provide that entire item from one manufacturer only.
The contractor shall provide all options, accessories and hardware necessary to meet the function of the design even if they are not specifically listed (i.e. mounting kits, separate or additional power supplies, input modules, transformers, etc).
FIXED EQUIPMENT
STANDARD CLASSROOM AND CONFERENCE ROOM
Provide the following Audio Video System as an all-inclusive system as described below, one system for each room:
DISPLAY
As indicated on the drawings, either a laser projector or 82” monitor will be located in the front of each classroom and be the primary display for instruction. Depending on the architecture of the room, the laser projector will either be an ultra-short-throw (UST) wall mounted projector, or a standard throw ceiling mounted projector. District standard models are indicated as follows in order of preference.
Substitutions of equal or better specified products must be pre-approved by the District:
Device |
Better or Equal |
|---|---|
Monitor |
Samsung QE82R |
*Wall-Mounted UST Laser Projector |
Epson PowerLite 700U WUXGA 4000 Lumens |
*Ceiling-Mounted Laser Projector |
Epson PowerLite L400U WUXGA 4000 Lumens |
* Projectors have filters in them that need to be cleaned regularly to preserve the life and image of these devices.
Mounting System
The display device will be securely mounted to the wall or ceiling with seismic bracing where required. Mounting details will be provided in the construction drawings. District standard models are indicated as follows. Substitutions of equal or better specified products must be pre-approved by the District:
UST Projector Wall-Mount: Extron USFM 100
T-Bar Ceiling Projector Mount: Extron PCM340 & UPB125
Hard Lid Ceiling Projector Mount: Chief CMA105, CMSxxx & RPAU
Monitor Tilt Wall-Mount: Chief XTM1U
A-V Enclosure
An enclosure will be provided that houses the A/V switch, power supply and accessories. District standard models are indicated as follows. Substitutions of equal or better specified products must be pre-approved by the District:
Device |
Better or Equal |
|---|---|
UST Projector Enclosure |
Extron USFM 100 |
Projector (T-Bar) Enclosure |
Extron PMK 560 |
Projector (Hard Lid) Enclosure |
Extron WMK 160 |
Monitor (T-Bar) Enclosure |
Extron PVM 220 |
Monitor (Hard Lid) Enclosure |
Extron WMK 160 |
System Source Selection, Switching, and Amplification
Each room will have one device, located in the A-V enclosure, that capable of A-V switching and amplification. District standard model is indicated as follows. Substitutions of equal or better specified products must be pre-approved by the District:
Extron PVS 407 D
The switcher shall have two inputs that each support connection to a dual input switching wallplate via one female RJ-45 connector.
Audio for switched video sources shall be carried on the same RJ-45 connections.
The switcher shall have a switched auxiliary audio input to support audio from video sources that are directly connected to the display or sources that only offer audio content.
The switcher shall provide two local HDMI inputs for sources that can be located in close proximity to the switcher.
The switcher shall have one HDMI video output
Connection from the switcher to the display device shall be provided with one HDMI to HDMI video cable.
An onboard audio amplifier shall provide gain / volume adjustment from -10db to +10db, adjustable in 1 db steps. The speaker amplifier shall have two channels, one stereo (default) or dual mono channels via one 5.0 mm 4 pole captive screw connector. The output of the amplifier shall be 25 watts (rms) per channel at 4/8 ohms.
In addition to the stereo / mono speaker output, an additional audio output that will produce line level output shall also be available. This line level audio output must be capable for being set for either fixed or variable level and balanced or unbalanced signal settings.
Media Source Interfaces
Each room will have either 2 or 4 HDMI source plates, as indicated on the construction drawings. The media source equipment shall be connected to the audiovisual system via one or two dual input, switching wall plates or the two local inputs of the switcher. These inputs shall enable the system to display video, graphic data and audio from laptop computers, tablets, Blu-ray players, document cameras, streaming devices, tuners, etc. District standard model is indicated as follows. Substitutions of equal or better specified products must be pre-approved by the District:
Extron PVT HDMI
The transmitters shall be placed in convenient locations throughout the classroom to facilitate easy connection of sources.
One PVT HDMI shall be used to connect up to two HDMI devices to the system.
Twisted pair transmitter shall transmit high resolution digital video and audio to the PVS AV Switches
Wallplate shall offer two female HDMI connectors for interfacing with video source devices.
Wall plate shall fit in a standard, 2-gang electrical box and feature Decorator-style type faceplates.
One stereo audio input on 3.5mm mini stereo jack shall be available for each video input
The output of the interface shall be via one female RJ-45 connector.
Connection to the PVS AV Switcher shall be via one UL plenum rated CAT 6 shielded twisted pair cable
To ensure correct grounding throughout the transmission cable, the braid shield must make contact with the shielded RJ-45 connector on both ends of the cable.
Media Source Control
Each room will have a single point of control for display power, system volume, and HDMI source selection. District standard model is indicated as follows. Substitutions of equal or better specified products must be pre-approved by the District:
Extron MLC Plus 100
Classroom media sources shall be controlled with a MediaLink Controller.
The MediaLink Controller shall contain six tri-color, multi-status LEDs push-buttons for device selection, display on / off control, and special functions. A rotary volume control knob with five LED volume indicators shall permit system volume level control.
The controller shall provide a LAN (IP) connector. This Ethernet connection shall be used for configuration of the controller and installation of device drivers for the equipment to be controlled.
The MLC Controller shall feature Extron IP Link Ethernet for monitoring, scheduling and control. This IP technology shall enable the device to be controlled, scheduled and monitored over a LAN, WAN or the Internet using Extron GlobalViewer software.
The Controller shall also feature two bi-directional serial ports to provide device control. These two ports shall control the display device and PVS AV Switcher respectively.
The MLC Controller shall also have two configurable (via software) digital input / outputs for devices such as sensors, switches, LEDs and relays.
Connection from the MLC Controller to the display shall be provided by one 50’ display control cable.
Connection from the MLC Controller to the PVS AV Switcher shall be provided by one 50’ Switcher Control cable.
Speakers
Each room will have one pair of speakers, either recessed in t-bar or wall mounted on each side of the display screen.
Rooms with T-Bar Ceiling: Extron FF 120
Rooms with Hard Lid Ceiling: Extron SM 3
In suspended ceiling applications, one pair of Extron FF120 speakers shall be used.
These speakers feature a low profile, 3.25” deep, aluminized composite enclosure, rectangular shape with a metal grille.
The coverage angle of the speaker offers an extraordinarily wide dispersion area of 170 degrees, providing a very wide room coverage pattern.
Meets the regulatory compliance safety specifications of NFPA90A, NFPA70; UL Listed for use in plenum airspaces: meets UL 2043 for heat and smoke release, meets UL 1480 for commercial and professional audio
The speakers feature a frequency response of 68 Hz to 18 kHz – 10db, half space.
The power capacity is 16 watts of continuous pink noise or 32 watts of continuous program media.
The nominal impedance is 8 ohms.
The input connector uses (1) 5mm captive screw for 1 input
Connection from the PVS AV switcher to the FF120 speaker is provided by Plenum rated 18 Gauge Speaker Cable Extron SPK-18.
In hard lid ceiling applications, one pair of Extron SM3 speakers shall be used.
Provide a compact, full-range 8 ohm surface mount speaker that shall accommodate division-of-labor installations. Compact, full-range surface mount speaker with a single-ported enclosure, grille, 8 ohm nominal impedance, and a concealed mounting system
Shall consist of a 3” full-range driver with a tuned bass reflex port
Shall provide a frequency range of 75 Hz to 18 kHz, -10 dB below average SPL, measured on-axis in full space
Shall provide a power capacity of 15 watts (rms) continuous pink noise per IEC 60268-5 and 30 watts (rms) continuous program
Shall provide a nominal sensitivity of 83 dB SPL (1 W, 1 m) measured in full space
Shall provide a nominal impedance of 8 ohms
Shall support 8 ohm direct connection from power amplifiers
Enclosure Requirements
Speech Reinforcement
An optional Speech Reinforcement system shall be included when indicated on the construction drawings. The wireless RF microphone system shall be used in conjunction with the audiovisual system to amplify the teachers voice and ensure it is heard clearly throughout the room. District standard model is indicated as follows. Substitutions of equal or better specified products must be pre-approved by the District:
Extron VLM 3001 (Optional based on needs, all items required)
VoiceLift Pendant Microphone:
The wireless pendant microphone is lightweight and designed to be worn around the neck with a lanyard or clipped on a lapel or belt. The instructor’s voice is picked up by the microphone and transmitted wirelessly to a receiver. The receiver passes microphone audio to the PVS AV switcher and speakers which evenly distribute sound throughout the room.
Each pendant microphone shall have volume control, a power switch, an auxiliary mic input, and a function button.
The microphone will have an instant alert feature that may be configured to allow the instructor to request assistance in the classroom.
The microphone shall be based on an industry standard radio frequency technology operating in a spectrum reserved exclusively for voice communications. This technology should not be affected by environmental factors, such as windows, sunlight, and fluorescent lighting, that create problems for infrared systems.
VoiceLift Wireless Receiver
The receiver shall wirelessly connect with pendant and handheld microphones and pass their audio signals to the dedicated VoiceLift Receiver input of a PVS AV Switcher.
The receiver shall support pairing with up to two microphones.
The receiver shall be based on an industry standard radio frequency technology operating in a spectrum reserved exclusively for voice communications. This technology should not be affected by environmental factors, such as windows, sunlight, and fluorescent lighting, that create problems for infrared systems.
VoiceLift Wireless Microphone Charging Station
This device is constructed of high impact ABS plastic and acts as a holding and charging station for up to two VoiceLift pendant or handheld wireless microphones.
Assistive Listening Interface: Legrand OR-KS35STST (or equal)
All classrooms shall have supplementary wiring necessary to support portable assistive listening devices for complying with applicable provisions of Section 504 of the Rehabilitation Act.
Provide an audio cable pathway for an Assisted Listening Device (ASD) by using a 20-gauge audio cable to make a connection from the audio out of the PVS 407D Switcher to a wall plate featuring a 3.5mm audio connection.
Adjustment of the output audio levels will be in completed in accordance of the ALD manufactures recommendations
3.5mm keystone interface shall be located in the same wall plate as the USB keystone.
Data Connectivity
The audio video system shall incorporate features that expand access and connectivity to an existing data network
The PVS Switcher shall incorporate a four port network switch, allowing the switcher to be configured over the over the network as well as data access for three additional devices over a single network drop
The audio video system shall include a IP Link enabled MediaLink controller, also connected to the network switch in the PVS Switcher, allowing remote monitoring, scheduling and control of the system over a network.
Energy Efficiency
The audio video system shall incorporate energy conservation features to reduce consumption and lower operating costs.
The system shall incorporate an Auto Power Save Mode with fast power-up that automatically deactivates the audio amplifier after 25 minutes of inactivity. It quickly returns to full power status in less than one second upon signal detection
The system shall incorporate a Network Standby Power Save Mode that allows the amplifier, wallplates, VoiceLift receiver, and network switch to be deactivated when not in use.
The system shall incorporate monitoring and scheduling of system peripherals, such as sources and displays, in order to deactivate them when not in use or alert to unauthorized use.
4.7 INTEGRATED AUDIO-VISUAL SYSTEM FOR LARGE VENUES
This section covers the requirements for an Integrator to provide equipment and install instructional audio/visual technology large school venues such as Libraries, Multi-Use Rooms, Gyms, and Theaters. There will typically be a large venue projector as the primary display device. Some locations will include additional monitors. All audio and image sources should be capable of being shown on the screen and audio heard throughout the room. The work covered in this document consists of furnishing all labor, material and services necessary to install a complete audiovisual system as indicated on the project drawings and in these specifications.
Deliverables: Prior to ordering materials or commencing any construction activities, the Integrator shall provide the Owner with a complete bill of materials, including all quantities of components, devices, equipment, and wiring required to complete this work. Submit product data, including manufacturer’s data sheets for all proposed system components.
SYSTEMS DESCRIPTION
Provide a complete Audio/Visual System for a large venue. The system switching and audio amplification equipment shall be securely mounted and concealed in a standard audio rack in an adjacent room. Audio and image source equipment can be connected to the system and displayed via numerous HDMI interface ports located at various locations as indicated on the construction drawings. An amplifier with multiple speakers will be sized appropriately to provide adequate sound throughout the venue. The audio and image signals from source devices shall be transmitted from the interface panels over high performance shielded twisted-pair (XTP) and HDMI cabling architecture. A front projection system with at least 7000 ANSI laser 4k capable projector with appropriate throw lens will be mounted from the ceiling. A 16:10 ratio electric projection screen will be installed size appropriately for the room.
GENERAL EQUIPMENT REQUIREMENTS
The room will be equipped with a customized easy to operate 7” touchscreen interface customized for the source inputs and display outputs. System parameters can be monitored, administered and controlled over the data network.
Acceptable functionality requirements are listed below categorized by type of equipment. Quantities are listed for movable, portable or loose equipment, and other selected entries. Where quantities are not listed, refer to the system drawings.
Deviations from this specification must be documented in writing to the Architect and Owner at least ten business days prior to the submittal date.
The System components shall all be correctly listed and labeled by Underwriters Laboratories Incorporated (UL) for their intended use.
All products shall be new and under warranty at the time of installation. B-stock, previously installed, refurbished or used equipment shall not be provided on this project.
Where the specification lists several manufacturers for a major item, or group of items, the AV Integrator shall provide that entire item from one manufacturer only.
The Integrator shall provide all options, accessories and hardware necessary to meet the function of the design even if they are not specifically listed (i.e. mounting kits, separate or additional power supplies, input modules, transformers, etc.).
FIXED EQUIPMENT
Provide the following Audio Video System as an all-inclusive system as described below. District standard models are indicated. Substitutions of equal or better specified products must be pre-approved by the District.
Large Venue Digital Projector Epson Pro L1075UNL (p/n: V11H940820)
Projector Specifications
Projection System: High-aperture Epson 3-chip, 3LCD technology
Projection Method: Front / rear / ceiling mount
Driving Method: Epson Poly-silicon TFT Active Matrix
Pixel Number: 2,304,000 dots (1920 x 1200) x 3
Color Brightness - Color Light Output: 7000 lumens
White Brightness - White Light Output: 7000 lumens
Aspect Ratio: Supports 4:3, 16:9, 16:10
Native Resolution: 1920x1200 WUXGA with 4K Enhancement
Resize: 640x480, 800x600, 1280x1024, 1400x1050 1. Brightness Uniformity: 85%
Pixel Arrangement: Cross stripe
Contrast Ratio: 2,500,000:1 (Dynamic Contrast On)
Color Reproduction: Up to 1.07 billion colors
Large Venue Projection Screen
An electrically powered projection screen with low-voltage trigger shall be provided with each projector. Screens for rooms with T-bar ceilings shall be recessed into the ceiling with appropriate matching trim. Screens for rooms with hard lid or open ceilings shall be wall mounted. All electrical and control wiring shall be concealed in conduit and brought directly into the power/control box on the appropriate side of the screen. Screen will have a 16:10 ratio. The specific size of the screen will be indicated on the construction drawings.
Custom “Black Drops” shall be included where indicated so the screen display area is at the appropriate height as indicated in the construction drawings. In some cases, a reverse fabric roll (Fabric Roll B) will be required when the screen is mounted in reverse of the display image, such as when it is mounted on the rear side of the Proscenium wall. A standard white case will be provided unless otherwise indicated (e.g. black case for backstage)
Recessed T-Bar Screen
Da-Lite Contour Tensioned Electrol with 1.1 HD Progressive Surface (e.g Da-Lite p/n: 21864LSI – exact screen size will be indicated in construction drawings)Surface Mount Screen
Da-Lite Cosmopolitan Tensioned Electrol with 1.1 Progressive Surface (e.g. Da-Lite p/n: 21878L – exact screen size will be indicated in construction drawings).
Wall-Mount Audio-Visual Cabinet TrippLite SRW15US
Wall-mount cabinet secures and organizes 15U of 19-inch rack. Houses audio-visual equipment up to 20.5 inches deep. Maximum load capacity of 200 lb. Swings away from wall on hinge for easy back-door access. Locking steel cabinet vented at sides, front, top and bottom. Flow-through ventilation keeps equipment cool. Secures 15U of 19 in. rack equipment up to 20.5 in. deep. 5-year limited warranty.
Cabinet Shelf TrippLite SRSHELF2P
Provide one shelf per A-V cabinet for holding assisted listening system docking stations and other peripherals.
Structural Projector Mount
A projector mount with seismic bracing will be provided for each projector and attached to the building structure. An additional custom 5/8” steel bracket may be required for mounting around a glulam or joist. A mounting detail will be provided in the construction drawings with the required parts and installation method. Typical parts are as follows:
I-Beam or Glulam: Chief p/n: CMA 360
Hard Lid or T-bar: Chief CMA 345
Projector Mount Legrand Chief Heavy Duty Projector Mount (p/n: VCMUW)
The projector mount shall have Independent roll, pitch and yaw adjustments for quick and precise projector registration. Quick connect/disconnect for convenient lamp and filter access on most projectors. Cable management through top of the mount without additional accessories. The projector bracket shall also use a 1.5” NTP (National Tapered Pipe) threaded pipe adapter for mounting a projector pole Weight Capacity: 250lbs.
Projector Extension Column Legrand Chief Speed Connect Fixed Extension Column (p/n: CMS###)
A 1.5” NPT column threaded on both sides will used to connect the projector mount with the structural adapter. Color shall be white unless otherwise indicated. Length as needed so the projection lens is level with the top of the projection area.
Eight-Input Scaling Presentation Switcher with DTP
For rooms with only one or two screens intended to show the same source image, a dual-output Presentation Switcher will be provided.
Extron IN1608xi IPCP SA p/n: 60-1238-85
System source selection and switching shall be provided by an Extron IN1608xi Eight Input HDCP-Compliant Scaling Presentation Switcher with DTP Extension
Integrated DTP inputs and output support transmission of video, control, and analog audio up to 330 feet (100 meters) over a shielded CATx cable
Inputs: Four HDMI; two universal 15-pin HD inputs for RGB, component video, S-video, or composite video; two DTP twisted pair inputs on RJ-45; six stereo balanced/unbalanced audio inputs on captive screw; two mic/line audio inputs on captive screw.
Outputs: Three simultaneous video outputs – two HDMI outputs, one DTP® output on RJ-45; one variable stereo audio output on captive screw. One DTP output is compatible with HDBaseT-enabled devices.
RS-232 insertion from the Ethernet control ports — System level device control to all remote locations via the switcher’s Ethernet ports, providing comprehensive control of endpoints and attached devices without needing additional equipment.
8x4 4K Scaling Presentation Matrix Switcher
For rooms specified with multiple displays intended to show different image sources simultaneously an 8-input 4-output matrix switcher with DTP extension will be provided.
Extron DTP CrossPoint 84 4K IPCP SA p/n: 60-1515-22
System source selection and switching shall be provided by an Extron CrossPoint 84 4K Eight-Input, Four-Output HDCP-Compliant Scaling Presentation Matrix Switcher with DTP Extension and integrated control processor.
Integrated DTP inputs and output support transmission of video, control, and analog audio up to 330 feet (100 meters) over a shielded CATx cable
Inputs: Six HDMI; two universal 15-pin HD inputs for RGB, component video, S-video, or composite video; two DTP twisted pair inputs on RJ-45; six stereo balanced/unbalanced audio inputs on captive screw; two mic/line audio inputs on captive screw.
Scaled Outputs: Four video outputs – two HDMI outputs, two DTP® output on RJ-45; one variable stereo audio output on captive screw. The two DTP outputs are compatible with HDBaseT-enabled devices.
RS-232 insertion from the Ethernet control ports — System level device control to all remote locations via the switcher’s Ethernet ports, providing comprehensive control of endpoints and attached devices without needing additional equipment.
Media Source Control Extron TLP 725M TouchLink Pro p/n: 60-1563-03 or Extron TPL 725T TouchLink Pro for tabletop installations p/n: 60-1562-03
Provide a 7” capacitive touchscreen interface for switching and control of AV equipment. **
Device shall feature scratch and smudge-resitant Corning® Gorilla Glass®
Device shall support Extron IP Link Pro Control Processors
Device shall include a built-in down firing speaker which can be configured to provide audio and button feedback
Device shall have a female RJ-45 jack located on the back of the enclosure that supports 10/100/1000Base-T, half/full duplex with auto-detect for connection to a LAN or WAN and includes link and activity LED indicators located on the left and right of the jack for troubleshooting network issues as well as supports PoE- Power over Ethernet, 802.3af
Device shall include a single high-speed micro USB 2.0 type B receptacle located on the back of the enclosure.
Provide two red/green LEDs along the left and right sides of the display to indicate room status, six rear-facing, red/green LEDs located on the back of the enclosure to provide ambient light to the mounted area and radiates a soft glow behind the panel to enhance visibility from distant locations, all of which can be configured or programmed as a group
Provide a built-in motion sensor located on the top bezel of the touch surface allowing the panel to be woken from a sleep state or set up via software to trigger any number of actions.
Provide a light sensor located on the top bezel of the touch surface that automatically adjusts the LCD screen’s backlight based on available ambient light.
Provide a front panel status LED that blinks red if the touch panel loses network connectivity with the control processor.
Device shall have a menu button located on the back setup of items such as IP address and sound volume at minimum.
Device shall support the following protocols: DHCP, DNS, HTTP, HTTPS, ICMP, SFTP, SSH, TCP/IP, UDP/IP.
Device shall have the following memory available, at minimum: SDRAM: 2 GB, Flash: 4 GB
Connection from the MLC Controller to the IP Control Processor (IPCP) shall be provided by a data network PoE switch.
Audio-Video Interfaces Two or more DTP HDMI interfaces shall be located at various locations in the room, as shown on the construction drawings and shall be no further than 300 cable feet away from the Presentation Switcher. Interfaces connect to the A/V Presentation Switcher via Extron DTP/XTP Cables (e.g. p/n: 22-236-03).
Passive HDMI interfaces located on the AV enclosure or within 15 cable feet for the switcher will connect directly via HDMI Ultra 4K cable. Interface shall be Extron WPD 110 A (p/n: 70-726-63). Interfaces connect to the A/V Presentation Switcher via Extron HDMI Ultra Cable (p/n: 26-663-## where ## equals length not to exceed 15 feet.
Microphone System Shure BLX24R/SM58-H10
Provide and configure at least 2 handheld wireless microphones with rack-mount receivers. Microphone receivers will connect directly to the Presentation switcher. Drawings will indicate if more than two wireless microphone systems are required per venue.
Amplifier
Venues, such as Libraries and Large Classrooms will utilize the built in 50W stereo amplifier of the Presentation Switcher. Two channel audio (stereo) will be provided by way of parallel speaker cabling on each side of the room. Larger venues such as Multi-Use Rooms, Gyms, and Theaters will have a separate multi-channel amplifier appropriately sized for the venue.
Where a separate amplifier is specified, depending on the size of the venue, the amplifier will be one of the following QSC CXD series amplifier as follows. The 700W x 4 Channel will be provided unless a larger amplifier is indicated on the construction drawings.
Model
Characteristics
CXD4.2
700W x 4 Channels
CXD4.3
1400W x 4 Channels
CXD4.5
2000W x 4 Channels
Speakers
Venues utilizing the 50W amplifier integrated into the Presentation Switcher will use Extron standard 2-way speakers. Venues utilizing a separate amplifier with use QSC speakers appropriately sized for the room. Speaker quantities will be indicated on the construction drawings.
Speaker Type
Make/Model
Part No.
T-Bar Speaker
Extron FF220T
42-141-03
Hard Lid Speaker
Extron SF 26CT
60-1310-03
Wall-Mount Speaker
Extron SM 26T
60-1308-13
Pendant-Mount Speaker
Extron SF 26PT
60-1752-03
Large Venue Main Speaker
QSC E112 w/E112YM
Large Venue Secondary Speaker
QSC E110 w/E110YM
4.8 ASSISTIVE LISTENING SYSTEMS
Furnish portable assistive listening system (ALS) as required to meet or exceed all applicable Federal, State, and Local ADA requirements. Dedicated ALS system shall be provided for rooms with a seating capacity greater than 50. Portable ALS systems may be provided for rooms with a seating capacity of less than or equal to 50.
Portable ALS will be stored in the Front Office for checkout as required.
Conference Room
Multi-Use Room
Library
Classrooms
Include all materials specified herein. It is the intent that complete operating portable systems be provided to the Owner, stored in the school’s front office, and checked out when required. Each room containing an Integrated Audio-Visual System will include a 3.5mm audio jack from the teacher’s workstation area to the A-V switcher in the ceiling. This will enable the user to connect the ALS transmitter to the line out of the A-V switcher so all classroom presentation audio, including wireless voice enhancement, can be transmitted to the ALS receivers.
For rooms without integrated Audio-Visual Systems, the portable kit includes a lavalier microphone that can be connected directly to the ALS transmitter.
EQUIPMENT
Portable Assistive Listening System
Type
Description
Model
Transmitter
ListenTALK Transciever
LK-1-A0
Receivers
ListenTALK Receiver Pro
LKR-11-A0
Neck Loops
Neck Loop
LA-166
Input/Output Cable
Audio Cable
LA-436
Microphone
Lavalier Microphone
LA-261
Charging Unit
4-Port USB Charger
LA-423-01
Carrying Case
Soft Shell Case 4
LA-483
Fixed Assistive Listening System
Description
Manufactuer
Model
Stationary RF Transmitter (72Mhz)
Listen Technologies
LT-800-072-01
Universal Rack Mounting Kit
Listen Technologies
LA-326
Coaxial Diple Remote Antenna (72Mhz)
Listen Technologies
LA-116
Intelligent DSP RF Receiver (72MHz)*
Listen Technologies
LR-4200-072
Universal Ear Speaker*
Listen Technologies
LA-401
Intelligent Earphone/Neck Loop Lanyard
Listen Technologies
LA-430
Intelligent 12-Unit Charging Tray**
Listen Technologies
LA-381-01
ALS Notification Signage Kit
Listen Technologies
LA-304
* Provide sufficient quantity of receivers to meet ADA Requirements
** Provide sufficient quantity of Charging Trays to accommodate all receivers
4.9 GLOSSARY
Audio/Visual
In this document, the term is used collectively to describe a wide variety of sound and video systems and subsystems, including sound reinforcement, audio playback, public address, foreground and background music, television (satellite, CATV, MATV}, baseband video (composite), HDMI, HD Analog), computer graphics (VGA and higher speed) and production intercommunications systems.
Audio Playback
The reproduction, through use of processing hardware, amplifiers and loudspeakers, of either pre-corded program material (e.g. a CD, a tape, a digital audio track, the audio portion of a television feed, a videotape or DVD) or the playback of live sound originating from a physically different space or property (overflow seating, Webcast, simulcast, etc.).
Audio-Teleconferencing
At a small scale, what is done with a speakerphone (e.g. Polycomm). At a larger scale, a dedicated system that relays audio between two points over telephone lines, while preventing the emergence of echo or audio feedback. Other audio issues involve control of background noise (HVAC Noise Control, sound isolation) and control of reflections within the room (Room Acoustic treatment).
Background Music
Generally, music that is played so softly and innocuously in a space as to fade into the “background’; forming more of a subliminal stimulus or masking of other sounds than a focal point itself. Using inexpensive loudspeakers, the sound is usually further shaped to remove the bass/beat (lows) and syllables (highs) to prevent the sound from drawing attention to itself. Contrast with Foreground Music.
Composite Video
A legacy analog video format video most commonly associated with consumer VCR’s. In the U.S., this is technically NTSC standard video. Not suitable a medium for transmitting computer graphics. By comparison with Computer Graphics, a simplistic evaluation of Composite Video would assign it a maximum resolution of 440x330 pixels.
Computer Graphics
The type of video created by a computer and displayed by a computer monitor. Beginning with lower resolution standards, such as VGA (640Hx480Wx60 frames/sec), an almost limitless and increasingly high resolution number of standards are supported. Commodity computer monitors and video projectors support WUXGA resolution (1920x1200) at 76+ frames/second), however yet higher standards are supported on engineering workstations, high-end PC’s and premium priced Projectors.
Contrast Ratio
The difference between the brightest and darkest perceived object within the field of view. The typical design ratio for computer screen environments is 4:1 with a maximum ratio of 10:1. A Comparison of Contrast Ratio Limits
100,000:1 Human eye.
10,000:1 Still photography, large format, museum quality silver gelatin print.
1,000:1 Cinema photography, 35mm Panavision camera with Panavision prime lens, Kodak wide latitude stock, custom negative processing, positive print struck directly from camera negative, observed in a laboratory quality control screening room conforming to SMPTE standards.
150:1 Typical 35mm cinema viewing conditions in a first-run venue.
100:1 Professional (i.e. Hollywood production house) video photography. Digital processing camera, digital recorder, monitor with SMPTE type C phosphor, adjusted per SMPTE recommended practices. Viewing room meeting SMPTE standards.
20:1 Typical limitation on over-the-air NTSC broadcasting.
10:1 VHS tape, typical.
4:1 Compressed video for Web distribution.
Device
Generic term for any computer or peripheral with a network address.
Display Device
Generic term for any item of equipment that produces a visible image.
Facility Panel
In essence, a plate placed in the wall or floor that contains specialized inputs and outputs associated with Audio-Visual uses. Whereas the plates commonly used for structured cabling systems are small, standardized, high-density and inexpensive (see Glossary entry above), those associated with AN are larger, custom, less dense, and use specialized connectors.
Feedback
The unpleasant condition of “howling” caused when a sound system makes a noise that is picked up by its own microphones which causes the system to make the same noise, only louder, in an ever increasing spiral. Proper selection, separation and orientation of microphones and loudspeakers and acoustic treatment can alleviate this condition, as can use of modern “feedback suppression” audio processing hardware.
Foreground Music
The next step in the continuum from background music. Foreground music is music played loud enough to interfere with normal conversation and to become a focal element of the space it is in. In addition to simply increasing the level the spectral shape of the sound is generally boosted at either the “treble” (high) end, or the “bass” (low) end in order to give it prominence. Better loudspeakers are required than with background music in order to retain fidelity.
Front Projection
An image display produced by projecting light on to a reflective surface (front projection screen). The method used in a motion picture theater. Scatter (ambient) light in the room is also reflected off the image surface, reducing contrast ratio. Functions best only in spaces with minimum ambient light, as for example, theater darkness.
Pixel
In a display device, the smallest element of the device that may be individually addressed to assemble the entire image. For example, a laptop computer with an XGA display provides an image made up of an array of pixels 1024 wide by 768 high.
Production Intercom
A system of “backstage” communications used by technical staff in producing live events. Typically, participants wear headphone/ microphones and beltpacks and connect by wired or wireless means to a system providing one or more discrete channels of communications.
Sharpness
A relative metric of human perception of detail when viewing an image on a display system. A function of both pixel size and contrast ratio.
SMPTE
Society of Motion Picture and Television Engineers. Professional society that sets standards used in television and cinema presentation.
Sound Reinforcement
The use of a system of microphones, processing hardware, amplifiers and loudspeakers to make a live talker/presenter/singer sound louder and more intelligible to the listener. The use of open microphones creates the possibility of audio “feedback’: The presence of a physical source of sound (the talker) places constraints on the location of the loudspeakers to ensure that the “suspension-of-disbelief” is maintain by making the audio image match the visual one. By contrast, audio playback is much simpler.
Video Conferencing
As the name implies, two way audio and video communications between two groups of people over telephone lines (or the Internet, or similar links). Passing the video images between parties requires considerable bandwidth in the link between the sites. Other video issues relate to how the cameras on the two ends are controlled (requiring operators and multiple cameras whenever more than a 6-8 people are involved at one end), how the audio is switched to follow changes in the video, how the faces are lit to present a useable camera image, and control of the sources of stray light and reflection in the room. All of the challenges in audio-conferencing noted above are also present in the Video Conferencing application.
Videowall
A large scale display surface made stacking together an array of individual smaller display devices. A videowall processor is used to assign pixels of an incoming signal to pixels of an individual display device. Mullions may be a distraction. Matching the individual display devices to one another is required. Can be reasonably bright. Requires 3 to 5 feet of depth. Usually maintenance intensive to own and operate.
Viewing Distance
Distance of the viewer from the visual display device, usually expressed in terms of image height (H). Controlled by visual acuity, contrast ratio, and image content. Comparison to viewing distance for typical conditions:
Reading this document, 1.5H
Desktop computer, 1.5H to 2.0H.
Direct view television set in typical home living room, 4H to 9H typical, 12H maximum.
Motion picture theater, SMPTE recommended practice, 2H to 6H.
Multiplex theater, seats 1 H to 4H, preferred seating at about 3H.
Visual Acuity
The limit of the human vision system, when corrected to population normal vision, to resolve detail. For text characters, a typical limit is reached when the character is less than 150th of the distance from the observer.