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TeachLogic Spectrum II User Manual

Infrared sound field system
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Summary of Contents for TeachLogic Spectrum II

  • Page 2 We hope you will take some time to review this manual to familiarize yourself with the product features and help you understand its performance. We are confident that the manual will help you gain the maximum use and benefit of the Spectrum II sound field system.

  • Page 3: How The System Works

    FM listening system (ALS). The gain control adjusts the signal output level to match the input requirement of the personal system. There is a line output on the back of the Spectrum II for recording or to feed a signal to another media devise.
  • Page 4 THE SPECTRUM II SYSTEM Basic Components Common to All Systems Spectrum II, Receiver/Amplifier/Mixer (IMA – 700) This is the main unit that has two infrared receivers, three sensor inputs, four stereo auxiliary inputs, one dual line output, page over-ride with page pass through feature, nine band equalizer, front panel output for personal FM assistive listening system, four amplifier outputs and an external in-line power supply.
  • Page 5 Infrared Dome Sensor (ICS-55 The ceiling sensor is the preferred infrared sensor for optimum performance. It comes standard with Maxim II, Spectrum II, VoiceLink II and VoiceLink IV packages. This is the unit that needs installed ceiling. comes with mounting/support bracket and 50 feet of plenum rated cable with RCA connector on each end.

  • Page 6: Infrared Transmitters

    BRC-101 and BRC-202 drop-in chargers are for the handheld (IRH-30) and pendant transmitter (IRT-89). The single slot (BRC-101) can charge either or the dual (BRC-202) can charge both simultaneously. In addition, both have a tray to insert two “AA” batteries for recharging. Infrared Transmitters Sapphire (IRT-55) The Sapphire’s vocal clarity is unsurpassed.
  • Page 7 Crescent (IRT-30) Crescent lightweight microphone/transmitter designed to be worn under the chin suspended by an adjustable lanyard. The Crescent shape designed efficient performance and user comfort. The dual internal microphones render optimum voice pick up and quality reproduction. The Crescent provides an auxiliary input (3.5mm) to accommodate the insertion of an iPod™...
  • Page 8 Body-Pack Transmitter (IRB-30), usually worn on the waistband, is the component that transmits the IR signal to the sensor. The IRB-30 has 10 emitting diodes on its front panel and is powered by two rechargeable NiMH batteries. Controls include a power “on/off” switch and a mic gain control.
  • Page 9 Collar Microphone (CM-838) is a flexible rod that is formed around the neck. The end with microphone windscreen then contoured up toward the mouth. The cord exits the rod in the center in back, out of the way, and is plugged into the body-pack. The collar mic utilizes a unidirectional mic element to minimize feedback and renders quality voice reproduction.
  • Page 10 Speakers: Ceiling Speaker (SP-628) is an extended frequency range 6” co-axial speaker housed in a metal back can sealed to the trim ring to form an infinite baffle enclosure. A screw terminal strip provides the external speaker connection. The speakers are equipped with three quick mount clamps for easymounting into a blind hole.

  • Page 11: Prior To Installation

    • Wear proper work clothing, avoid loose tails and sturdy shoes • Clean all components with a dry cloth • Use Teachlogic accessories only • Protect all cables from abrasion, sharp edges, and install in a tidy manner The following Basic Tools and Supplies will be Required to Install the System •...

  • Page 12: Installation Procedure

    • Drill the holes for the mounting hardware being used for mounting • With tabs oriented outward, install the Spectrum II on or under the shelf. • With tabs oriented inward, remove the tabs and install them on the shelf.
  • Page 13 • Mount the speakers in the brackets and direct them toward the center and pointed mid way toward the rear. • Connect the speaker wires, observing the lead with Teachlogic imprinted is the positive polarity. • Routed the speaker wires to the Spectrum amplifier, observing safe and protective enclosure.
  • Page 14 Installation of the Dome Sensor The ideal location for the dome sensor would be in the center of the ceiling. This will provide a clear signal path for the IR transmission from the transmitter to the dome sensor without obstruction. In addition, you will have 360º coverage and will minimize the transmission distance for more reliable performance.
  • Page 15 • Set the slide switch to the appropriate speaker level setting. • Plug the phoenix connector into the page over-ride jack • With the Spectrum II turned “ON”, send a page signal through the page input. • Adjust the page volume in the room to the desired listening level using the...
  • Page 16 Nine Band Equalizer If you have a pink noise generator and an octave analyzer, you can adjust the sound spectrum to your desired listening criterion. Without instruments you will have to rely on your listening ability and experience. Adjust the equalizer to compensate for the room acoustics to achieve maximum clarity and intelligibility.
  • Page 17 • Speak into the microphone and adjust the volume using the gain control on top of the body-pack and Ch. A volume control on the Spectrum II. • While talking, walk around the perimeter of the room to verify 100% reception of the signal.
  • Page 18 Drop-in Battery Charger The battery charger is a rather sophisticated charger. It will charge the NiMH batteries at the optimum charge rate, maintain full charge, and will recycle the batteries for extended battery service life. • Plug the charger into an AC outlet •...
  • Page 19 Spectrum II. • Once all the auxiliary inputs have been verified and adjusted, the system...
  • Page 20 Trouble Shooting • System is turned “on” but there is no sound o Verify the AC power; the red LED is not lit.  Check if system has been unplugged  Check circuit breaker  Call maintenance for assistance o System has power but still no sound ...
  • Page 21 GENERAL SPECIFICATIONS: IMA–700 SPECTRUM II RECEIVER/AMPLIFIER Receiver Input Infrared FM Modulation FM Wide-band Reception Frequencies Ch. A: 2.08 MHz Ch. B: 2.54 MHz Infrared 850 nm Wavelength Ch. A: 32.768 KHz Tone Signal 50 µs De-emphasis 40 Hz, -18KHz, ± 3dB Frequency Response ›65 dB...
  • Page 22 GENERAL TRANSMITTER SPECIFICATIONS Transmission Carrier Infrared Transmission Frequencies 2.08 MHz & 2.54 MHz Channel Switchable A or B Field Switchable Transmitting Diodes Modulation FM Wide-Band Pilot Tone Frequency 32.768 KHz Peak Deviation ± 25KHz Operating Range 2500 Ft². 60 Ft. Power Switch (Slide) On/Off Battery Charge Level (LED)
  • Page 23 IRH–30 HANDHELD TRANSMITTER Compander Circuit Pre-emphasis 50µS IR Emitter Location Built-in Transmission Angle 360º Current Consumption 330ma Microphone Element Unidirectional, Dynamic Battery Two Rechargeable NiMH, 1.2v / 2400mAH Battery Life Approximately 6 Hours Housing Aluminum Dimensions 10” L x 1½” Dia. Weight 11.4 oz.
  • Page 24 IRT-30 CRESCENT TRANSMITTER Shape Crescent, Under Chin Lanyard Attachment Snap-In, Top (Safety) Transmission Angle 180°, Conical Emitting Diodes Mute Switch Momentary, On/Off Aux. Input (3.5mm) Switchable, Mic. or Line Level Volume Control Thumb, Rotary Two Microphone Elements Condenser Type, Unidirectional Battery Single “AA”...
  • Page 25 DUAL DROP-IN CHARGER (BRC-202) Charging Ports (Two) Pendant or Handheld Flashing Red LED Batteries being charged Solid Green LED Batteries fully charged Dimensions 7½” W x 3¾” D x 1½” H Weight 14.8 oz. ICS-55 CEILING DOME SENSOR Operating Frequency 2MHz to 2.6 MHZ Number of IR LED’s 30 Radial Spaced...
  • Page 26 SP-628 2-WAY CEILING SPEAKER Frequency Range 80 Hz to 15 kHz, ± 6dB Power 30 Watts Continuous Sensitivity 89dB SPL (1W/1M) Impedance 8Ω Crossover Frequency 6 kHz Nominal Coverage 90° x 90° LF Driver (5.25 in) Polymica / rubber Magnet 10 oz HF Driver High efficient 1”...

  • Page 27: Five Year Limited Warranty

    Five Year Limited Warranty TeachLogic Infrared products are guaranteed to be free of defects in workmanship or material for a period of five (5) years from date of original purchase, subject to the following conditions: 1. Warranty excludes defects caused by normal use and wear, any abuse, or failure to use the product in accordance per instructions.
  • Page 28 1688 Ord Way Oceanside, CA 92056 1 800 588 0018 sales@teachlogic.com 1 760 631 1283 www.teachlogic.com...