University of Minnesota Office of Classroom Management
Office of Undergraduate Education
http://classroom.umn.edu

Projection Capable Classroom A/V System Specifications

The Projection Capable Classroom Standard is specified as the technology baseline for all University of Minnesota Twin Cities (UMTC) general purpose classrooms. The standard may be specified by cognizant university officials for other classrooms or other locations as appropriate.

Definition

Projection Capable Classroom: A classroom that has fixed data/video projection capabilities, Internet connectivity at the instructor's station, student networking (wireless), input devices, a user-friendly standard laptop interface, smart control system with networking option, and capabilities for other add-on modular features.

Projection Capable Classrooms use standardized control/interface systems and employ a standardized operational protocol. The Projection Capable Classroom Standard includes a hotline phone for faculty assistance and the assistance features of the U of M Classroom Automated Management System (CAMS).

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 the UMTC General Purpose Classroom Standard. Contact Classroom Technical Services (CTS) for additional technical details on the Projection Capable Classroom Standard, or contact the Office of Classroom Management (OCM) for applicability of the standard in any given classroom.

General

The room will be equipped with a standard, easy-to-use instructor interface. The audio system will be monaural for program sound. The audio/video (A/V) system will be controlled by a control system with the control panel mounted on the instructor station. System parameters can be monitored, administered, and controlled over the campus network. The A/V equipment will be located in an equipment rack inside of the instructor station.

It is important for the university to implement a standard operating protocol so faculty can depend on a standard, familiar interface in each classroom. The interoperability standard is based upon AMX communication protocols, AMX classroom management software, and proprietary code developed by the University of Minnesota.

Projection Surface

The room will be equipped with a matte white 16 x 9 aspect ratio front projection surface mounted to the front wall. The projection surface will usually be a retracting screen, but may be a specially coated fixed surface. The size of the surface will be dictated by room geometry. All 10-foot-wide or larger screens shall be electric. In retrofit installations, 16 x 9 should be used where budget and physical layout permit the transition to this standard. Electric screen controls shall be located at switch height near the instructor station.

Projection System

The projection system will consist of a fixed (usually ceiling-mounted) data/video projector capable of at least 3500 ANSI lumens, accepting inputs from Composite Video, S-Video, and Computer (RGBHV) sources at a minimum (others may be specified depending on I/O modules). The projector's native resolution will be 1024 x 768 pixels (XGA) but will be capable of projecting a UXGA (1600 x 1200 pixel) signal.

Instructor Station

The room will be equipped with a PCC standard lectern, pedestal, or table instructor station, depending on room characteristics and type of use. Special lectern/instructor stations may be specified on a case-by-case basis.

A/V Power Requirements

A 20-A un-switched dedicated circuit shall be provided for the A/V system, with duplex outlets located in the cabling junction box and at the ceiling support bracket for the projector. A green wire ground shall be required on all new construction.

A/V Conduit Requirements

Access to wiring connections shall be at the cabling junction box.

The minimum conduit size to the fixed projector location for the signal and control cables shall be 1 ¼". Appropriately sized conduit (minimum ¾") shall be provided from cabling junction box to speaker locations and to additional equipment locations as appropriate.

Cabling Junction Box

The room will be equipped with a locking cabling junction box. The box shall house boxes for four (4) data jacks, one (1) duplex outlet, and all conduits necessary for connecting to other A/V system components and shall generally be located at receptacle height on wall near the teaching area. Instructor station umbilical cabling harness shall emanate through an appropriately sized feed-through grommet.

Cabling Harness

The umbilical cabling harness from the cabling junction box to the instructor's station shall consist of (1) AC power cable, network cabling as required and audio, video and control signal cables as required. The harness shall run on the floor surface, be flexible, have an abrasion resistant sheath and have a core stainless steel cable strain relief.

Data Requirements

The room will be equipped with Gigabit Ethernet connectivity. The cabling junction box shall house four data jacks as a minimum.

Wireless Requirement

A wireless networking hub in the classroom shall provide 802.11b wireless networking capability.

Telephone

A wall-mounted campus phone, with restricted ringing and calling capabilities, shall be located near the instructor station at ADA recommended height. The main function of the phone shall be communication with the Classroom Support Hotline.

Audio System

The monaural audio system (exact type to be determined by room requirements) will be designed to fit the room's environment with an appropriate speaker system (with instructor speech reinforcement as required). The program sources are the same as for the video system. Large classrooms and auditoriums will have audience microphone capability provided throughout the student seating area.

The room will incorporate speech reinforcement with a wired or wireless lavaliere microphone included on an as-needed basis according to room requirements. A line-level audio output jack (RCA) will be available on the front of the equipment rack for interfacing hearing assist or other equipment.

ADA Requirements

The principles of Universal Design establish desirable goals with respect to classroom design and installed technology. The Projection Capable Classroom Standard includes tactile buttons on the control panel, easily reached control panel locations, closed captioning, hearing assistance capability, and user-friendly operator protocols among the features that are consistent with Universal Design principles.

Input/Output (I/O) Hardware Devices

The following are the standard hardware sources for the system:

  • Provided in instructor station:
    Laptop (connection point located on the Instructor station)

The following optional hardware modules may be specified:

  • Installed (departmental) computer
  • Document camera
  • VHS or DVD Player
  • Other specialized systems

I/O Connections

The following are the standard I/O connections for the system (all located in the top pocket):

  • HDMI laptop connection cable
    VGA laptop connection cable
    Laptop audio connection cable
    Laptop data connection cable
    Laptop AC power duplex outlet
 

 

LARGE CLASSROOM SUPPLEMENTAL REQUIREMENTS

Large classrooms, lecture halls, and auditoriums require additional Projection Capable Classroom technology infrastructure, which will be individually specified on a case-by-case basis. Requirements may include:

  • Increased data connectivity/bandwidth
  • Separate AV booth
  • Additional AV equipment closets
  • Dual projection systems
  • Additional I/O modules and systems
  • Additional internal future growth conduit
  • Auto-tracking cameras
  • Auto-balancing sound system
  • Audience microphone locations
  • Secondary instructor station(s)

 

Control System

The networking option will consist of an integrated controller located in the instructor station. An eight-button panel will be located on the instructor station. The control system will have an optional network connection to allow remote support from Classroom Technical Services. The following functions will be programmed into the system:

  • Video projector power control
  • Projector source selection
  • Volume control
  • Video mute
  • Audio mute

A level of automation will be programmed into the system in order to simplify room operation for the user. In order to save video projector lamp life, the system will be programmed to shut down after a specified amount of time with no user activity. The room will also be programmed to prevent system operation after hours. The system operation can be controlled by day or by week at OCM-specified access times.

Monitoring Option

The networked control system option allows the OCM Classroom Support Hotline operator to monitor and troubleshoot the operating characteristics of the room technology and to assist the instructor with any problems. Remote control and operation of the room equipment is enabled to facilitate the remote resolution of problems during actual classroom teaching activity. The control systems communication protocols permit 24-hour monitoring of system parameters and enhance proactive problem solving to eliminate system down time. A software-based automated management program oversees the operating parameters of the classroom systems, sends repair and maintenance alerts, and allows monitoring and analysis of system operation. Classroom monitoring will be accomplished by the standard U of M Classroom Automated Management System (CAMS).