User manual | BID B12-19 System Specifications

BID B12-19
System Specifications
1. AMPLIFIER - Audio Enhancement Prime Amplifier:
Part# 3000-0021
The amplifier shall be used to power the speakers contained within the classroom. It will provide the ability
to connect to the dedicated self-contained Infrared receiver in the ceiling via a cat-5 cable. The amplifier
shall have the ability to interface directly with a 25 Volt, 70 Volt, or 100 Volt public address system. This
connection must be a hard wired directly to the public address high impedance line. The amplifier shall also
have a selectable teleconferencing audio input/output. This shall provide the ability for one of the line
outputs to be internally disconnected from one of the line outputs to facilitate the use of the amplifier as a
video conferencing interface.
The Amplifier shall meet the following specification:
a. Audio Power: 30 Watts RMS, 50 Watts Peak
b. THD < 1% 50 Hz to 15 kHz
c. Frequency Response: 50 Hz to 15 kHz +/- dB.
d. Power Requirements: 24 VDC, 2 Amps. Power Supply shall be included
e. The amplifier shall have the following controls:
i. Auxiliary Input Volume Controls – 3 Front Panel Controls
ii. Assistive Listening/Line Output – 1 Front Panel Control
iii. Power On/Off - Front Panel Control
iv. 5-Band Equalizer – Rear Panel Controls – Controls must be rotary shaft style controls with a
center detent to indicate the zero position
v. Teleconferencing Mode Selection – Rear Panel
vi. Line Output Level Control – Rear Panel
vii. Teacher Voice Override – on/off – Rear Panel
f. All volume control for both the teacher and student pass around microphone shall be done remotely
through the teacher microphone only. Systems that have level controls for the teacher or student
microphones on the amplifier or in any other location other than on the teacher microphone will not
be considered.
g. The Amplifier must have the ability to decrease the level of the multi-media presentation when the
teacher speaks. This must be done actively, only quieting the multi-media when the teacher is
actually talking into the microphone. (Teacher Voice Override)
h. The amplifier shall have the following connections:
i. Assistive Listening/Line Output – Front Panel
ii. Line Output – Rear Panel
iii. 4 Speaker Connections – Rear Panel
iv. 1 Dual RCA Line Input – Rear Panel
v. 2 3.5mm Line Inputs – Rear Panel
vi. 1 3.5mm Line Input – Front Panel
vii. Modular 8P8C Jack for connection to Ceiling Infrared Sensor/Receiver
viii. Coaxial 24 VDC Power Connection
2. INTEGRATED INFRARED SENSOR / RECEIVER – IR SATELLITE:
Part # 3400-0014
The Integrated Infrared Sensor/Receiver will be an independent system, with all necessary electronics to
support the infrared receiving functionality mounted in the ceiling. The sensor/receiver will be connected to
the amplifier through a universal twisted pair cable, using balanced audio connections. Power for the
infrared sensor receiver will be provided through the same cable as the balanced audio connections.
The sensor receiver will provide the following functionality. These features must be included on board the
sensor/receiver, and not require any external support to perform these functions.
a. Dual Channel Infrared reception
b. Auxiliary Input
c. Remote control of both infrared channels, and the auxiliary input from the teacher microphone
d. Public address system mute terminals – This is a contact closure connection when closed, it mutes
the audio output from the sensor/receiver
e. Advanced Feedback Blocker
i. The system shall have the ability to actively control feedback. This shall be done via an
analog circuit that provides up to five active filters to control specific frequencies,
ii. The Feedback Blocker shall also have the ability to lower the overall of the system by up to
6dB, during a user error situation where the overall system gain is manually turned up too
high
iii. The Feedback Blocker system shall automatically remove the filtering upon resolution of
the user initiated error condition
iv. The Feedback Blocker shall be of an analog design – in order to avoid the detrimental
effects of digital sampling, only analog systems shall be considered in order to implement
this feature.
f. Audio Output
i. The system shall have the ability to provide both 3 independent audio signals (Ch 1, Ch 2,
and Aux) or with the change of a DIP switch, provide a mixed signal.
ii. The system shall provide an audible tone when the remote volume control on the teacher
microphone is used. It will also provide a low & high output level, and an on/off selection
via a DIP switch setting
iii. The system shall have the capability of attenuating its output level by -10 dB with a DIP
switch setting
g. Emergency Alert Contacts
i. The system shall provide a trigger signal when the teacher presses and holds a button on her
transmitter for more than 2 seconds.
ii. The system shall be capable of providing a visual indication of 3 red LED’s when the
teacher initiates a trigger signal
iii. The system shall also be capable of receiving a trigger acknowledgement signal back from
an external source, and altering the visual indicator from 3 red LED’s to 2 Green and 1 red
LED.
h. Control System Integration
i. The system shall have on board the capability of being controlled via RS-232 protocol.
ii. The system shall also have the capability of broadcasting RS-232 commands when the
teacher presses the up/down volume controls on their microphone
i. Power Requirements: 24Vdc, Power Supplied from the amplifier.
j. Receiving Frequencies: 2 selectable frequencies: 2.3 MHz and 2.8 MHz.
k. Receiver Type: Tuned Radio Frequency (TRF)
l. Signal-to-noise: >80Db.
m. External Sensor(s}
i. The system must be capable of operating in a standard classroom without the addition of
any external sensors
ii. For larger spaces, the system must be capable of support up to 4 additional infrared sensors
n. Mounting Bracket as required
o. Controls: System must have available the following controls
i. Channel 1 Volume Control – Fully controllable from the teacher microphone remotely
through the Infrared system
ii. Channel 2 Volume Control – Fully controllable from the teacher microphone remotely
through the Infrared system
iii. Auxiliary Input Volume Control – Fully controllable from the teacher microphone remotely
through the Infrared system
3. INFRARED TEACHER MICROPHONE:
Part # 3100-0063
The teacher microphone must be capable of being either clipped onto the teacher or worn
around the neck if the microphone is worn around the neck a “break away” lanyard is
required.
a. Sub-carrier frequencies: 4 selectable frequencies from 2.00 MHz to 4.00 MHz b.
Audio distortion: <1.0% (±40kHz deviation @ 1kHz)
b. Internal charger circuit.
c. External Controls
i. Power On/Off
ii. Mute On/Off
iii. Security Alert Activation
iv. Selectable Volume Up/Down
d. Volume Control Capability
i. Volume control via the infrared wireless microphone system to allow the
teachers to remotely adjust their own volume level
ii. Volume control for the other channel from the teacher’s microphone
iii. Volume control for the auxiliary input to the sensor/receiver system
iv. Remote Control functionality that allows for enabling additional multi-use
functions from the teacher microphone.
e. External Connections:
i. 3.5mm stereo jack – External audio auxiliary input
ii. 3.5mm stereo Jack – External lavaliere or headset microphone input
iii. Charging connector
f. Power – 1 “AA” NiMH or Alkaline Battery (Systems using 2 batteries will not be
considered)
g. Charging Circuit
i. Charging circuitry in microphone must have the ability to sense what type of
battery has been placed in the microphone. The charging circuitry must also
carefully manage the charge and dis-charge cycles of the batteries to maximize
battery life.
ii. A system that simply senses voltage presents on a 3rd contract is not
acceptable; the charging circuitry must be able to distinguish between NiMH,
and Alkaline batteries.
4. INFRARED HANDHELD STUDENT MICROPHONE:
Part #3100-0064
a. Sub-carrier frequencies: 4 selectable frequencies from 2.00 MHz to 4.00 MHz b.
Audio distortion: <1.0% (±40kHz deviation @ 1kHz)
b. Internal charger circuit.
c. Operational Modes - the handheld microphone must be equipped with two operational
modes:
i. Push-to-Talk Mode - the user simply depressed the power button to talk, and
when released the microphone automatically turns off - this provides for a
number of separate microphones to be used consecutively and greatly reduces
the chance of channel interference.
ii. Power-On Mode - The user depresses the power button, and slide is vertically
into the on position - this holds the microphone in the on state for continuous
operation
d. External Connections:
i. 3.5mm stereo jack – External audio auxiliary input
ii. Charging connector
e. Power – 1 “AA” NiMH or Alkaline Battery (Systems using 2 batteries will not be
considered)
f. Charging Circuit
i. Charging circuitry in microphone must have the ability to sense what type of
battery has been placed in the microphone. The charging circuitry must also
carefully manage the charge and dis-charge cycles of the batteries to maximize
battery life.
ii. A system that simply senses voltage presents on a 3rd contract is not acceptable; the
charging circuitry must be able to distinguish between NiMH, and Alkaline batteries.
5. SPEAKERS: Provide complete distributed ceiling mounted speaker system (Metal back box, speaker,
grill, etc.). Quantity as required (minimum 4, no cluster).
Part # 3300-0030
a. Frequency Range: 70 Hz to 15 kHz (-10dB)
b. Frequency Resp: 100 Hz to 14 kHz +/- 3dB
c. Power Handling: 50 Watts continuous
d. Driver type: 4 in. (102 mm) Cone
e. System type: Tuned and vented
f. Sensitivity: 88 dB 1 Watt/1 Meter.
g. lmpedance: 8 Ohms nominal
h. Mounting: Integrated C-Clamp
i. Plenum rating: Speaker back can meets UL2043 criteria for plenum installation
j. Terminals: All metal spring terminals
k. Dimensions: Depth 5.8 in. (147.3 mm)
l. Grill Diameter: 8.5 in. Dia. (216 mm)
m. Mounting hole: 7.0 in. (178 mm)
n. Weight: 3.0 lbs. (1.36kg)
6. TILE BRIDGE
Part # 3300-0029

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