AT-216 OPERATOR’S MANUAL AT-216 Wireless Auditory Assistance Kit 357 West 2700 South • Salt Lake City, Utah 84115 • Phone: (800) 496-3463 • Fax: (801) 484-6906 • http://www.comtek.
Table of Contents Section 1: General Information 1.1 Purpose of Equipment 1.2 Unit and Accessories (Supplied) 1.3 PR-216 Controls, Connectors and Indicators 1.4 M-216 Controls, Connectors and Indicators Section 2: Operation 2.1 Operating the System 2.2 Optional EnviroMic 2.3 Connection Possibilities 2.4 Frequency Selection 2.5 Battery Removal / Replacement 2.
AT-216 Digitally Synthesized Wireless Auditory Assistance Kit A Close-Up On Sound Page 1
Section 1 General Information Introduction Thank you for purchasing the COMTEK AT-216 FM wireless auditory assistance system. For over 30 years, COMTEK FM systems have successfully proven to be an effective way to help the hearing-impaired individual in difficult listening situations. The new AT-216 FM system combines the experience and integrity of COMTEK’s preceding models with the advantages of today’s digital technology.
Section 1 General Information (Continued) 1.2 Unit and Accessories Supplied 1. Personal receiver (PR-216) 2. Neckloop transductor (NTC-102) 3. Two belt clips (BC-216’s) 4. Transmitter (M-216) 5. Microphone and clip (SM-183) 6. Battery charger (NBC 9-2C) 7. Rechargeable batteries (NH9-150) 8. Attenuator adaptor cord (CB-36ST) 9. Earphone assembly (SM-N) 10. Flexible specialty antenna (FWA-216) 11.
Section 1 General Information (Continued) 1.3 PR-216 Controls, Connectors and Indicators EnviroMic ON / OFF SWITCH: This switch turns the optional built-in EnviroMic on and off. (Set to right for ON and to left for OFF.) CHANNEL SWITCHES: These rotary switches are set to the same channel as the transmitter. Actual frequency of operation must agree with the transmitter. (See page 14 for frequency selection chart.
Section 1 General Information (Continued) 1.4 M-216 Controls, Connectors and Indicators COMPAND AUTO / OFF SWITCH: This switch overrides the automatic selection of the companded channels to non-companded operation (normally set to the right). CHANNEL SWITCHES: These rotary switches are set to the same channel as the receiver. Actual frequency of operation must agree with the receiver. (See page 14 for frequency selection chart.
Section 2 Operation 2.1 Operating the System A. Before operating the system: 1. Ensure that the M-216 transmitter and the PR-216 receiver are on the same channel (see frequency selection instructions in Section 2.4). 2. Check that new 9 volt alkaline batteries have been installed in both the receiver and the transmitter. 3. If 9 volt rechargeable batteries are used, ensure that they have been allowed to charge at least twelve hours to bring to a full charge (see battery charger instructions in Section 3).
Section 2 Operation (Continued) 2.1 Operating the System (Continued) C. Receiver set up: 1. Slip the neckloop over the listener’s head, and let it rest comfortably around the neck with the pendant in front. The neckloop can also be concealed underneath clothing. 2. Connect the neckloop to the receiver by inserting the neckloop plug into the output receptacle on top of the receiver, and turn on the receiver. The red indicator lights up indicating condition of battery and that the receiver is operating. 3.
Section 2 Operation (Continued) 2.2 Optional EnviroMic The PR-216 may be equipped or retrofitted with the optional EnviroMic feature for assistive listening applications where both environmental sounds and the speaker’s voice from the transmitter must be heard. This built-in omnidirectional environmental microphone has been equalized to enhance speech discrimination when used with hearing aids, headphones, or button transducers.
Section 2 Operation (Continued) 2.2 Optional EnviroMic (Continued) When a cochlear speech processor is used, the PR-216 receiver and M-216 transmitter take the place of the cord-type auxiliary microphone of the processor. COMTEK provides an assortment of direct audio-input cords for hearing aids and cochlear speech processors. An audiologist should be consulted when direct audio input cords are used. Operating EnviroMic: The PR-216’s EnviroMic gain is nominally set at the factory to a suitable level.
Section 2 Operation (Continued) 2.3 Connection Possibilities The CB-48ST and the CB-36ST are specialty adaptor cables that must be used when connecting the M-216 transmitter or the PR-216 personal receiver to other electronic audio devices. To Simultaneously Record and Monitor the Speaker Using the Optional CB-48ST Cord... Insert black plug into microphone input jack of cassette recorder. Neckloop or other transducer devices plug into silver monitoring output jack. Insert red plug into PR-216 receiver.
Section 2 Operation (Continued) 2.4 Frequency Selection (216-217 MHz) The PR-216 personal receiver can operate on one of 57 available channels between 216 MHz and 217 MHz. COMTEK’s channel designations indicate both standard narrow-band channels and high-fidelity, narrow-band companded channels. Channels 1-40 are standard narrow-band channels (5KHz deviation) offering compatibility with other manufacturers’ receivers such as the Phonak MicroEar.
Section 2 Operation (Continued) 2.5 Battery Removal / Replacement Pull back battery door latch and allow battery cover door to spring open. To remove battery, simply manipulate the bottom of battery out of the compartment and remove. To insert battery, face battery with negative terminal in line with large hole in battery compartment, press battery into compartment and close battery door until it snaps shut. 2.6 Belt Clip Installation / Removal STEP 2: Rotate belt clip down onto case.
Section 3 Battery Charger Battery Charger The NBC 9-2C charger supplied with the AT-216 system will recharge either Nickel-Cadmium (Ni-Cad) or Nickel-Metal Hydride (Ni-MH) batteries. Ni-MH batteries are supplied with the AT-216 system. Note: Do not attempt to charge alkaline batteries with the NBC 9-2C charger. To charge the AT-216 system, please take the following steps: 1. Make sure that rechargeable batteries are installed in the receiver and transmitter.
Section 4 Frequency Chart / Frequency Groups CHANNEL FREQUENCY NARROW-BAND CHANNELS (Compatible with other manufacturers) CHANNEL FREQUENCY 32 216.7875 MHz 1 216.0125 MHz 33 216.8125 MHz 2 216.0375 MHz 34 216.8375 MHz 3 216.0625 MHz 35 216.8625 MHz 4 216.0875 MHz 36 216.8875 MHz 5 216.1125 MHz 37 216.9125 MHz 6 216.1375 MHz 38 216.9375 MHz 7 216.1625 MHz 39 216.9625 MHz 8 216.1875 MHz 40 216.9875 MHz 9 216.2125 MHz 10 216.2375 MHz 11 216.2625 MHz 41 216.
216 MHz NARROW-BAND FREQUENCY GROUPS 216 MHz WIDE-BAND FREQUENCY GROUPS Compatible with other manufacturers 5 KHz deviation For COMTEK PR-216 10 KHz deviation GROUP A GROUP 1 CHANNEL FREQUENCY CHANNEL FREQUENCY 1 8 12 26 34 216.0125 MHz 216.1875 MHz 216.2875 MHz 216.6375 MHz 216.8375 MHz 41 44 46 53 57 216.0250 MHz 216.1750 MHz 216.2750 MHz 216.6250 MHz 216.8250 MHz GROUP B GROUP 2 CHANNEL FREQUENCY CHANNEL FREQUENCY 4 10 14 28 36 216.0875 MHz 216.2375 MHz 216.3375 MHz 216.6875 MHz 216.
Section 5 Optional Accessories Optional Accessories 1. Digital fast charger (NBC 9-2DF) 2. Snap-on belt clip (BC-216) (supplied with AT-216 kit) 3. Headworn unidirectional electret microphone (PSC-HM) 4. High efficiency headphones (LS-3) 5. Cochlear speech processor cord (CC-24) (four types available) 6. Rigid specialty antenna (RWA-216) 7. Attenuator adaptor cord (CB-48ST) 8. Euro direct audio-input single cord (EDC) (four types available) 9.
Section 6 Trouble Shooting Batteries and Battery Charging If... Test indicator lamp doesn’t illuminate when units are turned on... Then... • If rechargeable batteries are used, ensure that they have been allowed to charge at least twelve hours to a full charge. Verify that the charging indicator lamps are illuminated when the charging plugs are plugged into the units. The units’ power switches must be in the “off ” position for charging.
Section 6 (Continued) Noisy or Distorted Audio If... You hear excessive background noise or distortion... Then... • Turn the AT-216 F.M. system “off ” and leave the hearing aids on in the “T” position to determine if the noise or distortion is still present in the hearing aids. If the noise or distortion is still present, the hearing aids will need to be checked by your hearing aid specialist. If the noise or distortion is not present in the hearing aids, check the following items: 1.
Section 6 (Continued) Channel Compatibility If... Two transmitters are operating on the same channel within 100 feet from one another, you will experience interference which sounds like distorted voices, static, or chirping sounds ... Then... • When only two transmitters are operating in the same proximity (within 100 feet) any different channel may be selected for the other transmitter. If... More than two transmitters are operating in the same proximity... Then...
Section 7 Care and Maintenance Care and Maintenance Avoid excessive heat. Don’t leave the transmitter or receiver in hot sun, on a radiator, or near other sources of high temperature. Avoid rough handling. The receiver and transmitter may be damaged if dropped. Use the snap-on belt clip whenever possible. Remove batteries when you store unit for a long time. When battery becomes exhausted, it may leak and damage the instrument. Even a new battery may leak because of a slight imperfection.
Section 8 Warranty and Service Warranty COMTEK warrants this product to be free from defects in workmanship and material under normal use and conditions for a period of one year from date of original purchase. Items such as batteries, neckloops and cords, are not covered by the warranty. Damage due to misuse, ill treatment and unauthorized modification and repairs are not covered by this warranty.
357 West 2700 South • Salt Lake City, Utah 84115 • Phone: (800) 496-3463 • Fax: (801) 484-6906 • http://www.comtek.
