Comtek AT-216 User manual

AT-216 OPERATOR’S MANUAL
357 West 2700 South • Salt Lake City, Utah 84115 • Phone: [phone] • Fax: [phone] • http://www.comtek.com
AT-216 Wireless Auditory
Assistance Kit

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 and Smart-Mic
2.3 Connection Possibilities
2.4 Frequency Selection
2.5 Battery Removal / Replacement
2.6 Belt Clip Installation / Removal
Section 3: Battery Charger
Section 4: Frequency Chart / Frequency Groups
Section 5: Optional Accessories
Section 6: Trouble Shooting
Section 7: Care and Maintenance
Section 8: Warranty and Service
© 2006 COMTEK®All rights reserved.
Print Release Date 03-23-2006-D

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AT-216
A Close-Up On Sound®
Digitally Synthesized
Wireless Auditory Assistance Kit

Introduction
Thank you for purchasing the COMTEKAT-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 newAT-216 FM system combines the experience and integrity
of COMTEK’s preceding models with the advantages of today’s
digital technology. Plus, the all-new rugged packaging design of the
receiverand transmitter ensures that this system will hold up to the
rigors of every day use.
This product is made in the U.S.A. with strict quality control
procedures to ensure your satisfaction. A careful reading of this
quick-reference manual will acquaint you with the characteristics
of theAT-216 system and ensure ease of operation.
1.1 Purpose of Equipment
TheAT-216 system functions as a remote microphone for the user,
overcoming the greatest listening problems for the hearing-impaired:
• High levels of background noise
• Reverberation effects
• Distance between the speaker and listener.
TheAT-216 system enables persons with impaired hearing to comfortably
take part in activities at school, home, work, and play. In addition to a
hearing aid, the user wears the personal receiver and the neckloop
retransmit device. The PR-216 personal receiver picks up the voice of the
person wearing the M-216 transmitter, and the neckloop then retransmits
it to the hearing aid for Close-Up Sound®. If no hearing aids are used, the
receiver may also be used with headphones instead of the neckloop.
Now the person with impaired hearing has a direct link to the speaker at
greater distances for improved listening, clarity, andbetterunderstanding.
Section 1 General Information
Page 2

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 (NH9-200)
8. Attenuator adaptor cord (CB-36ST)
9. Earphone assembly (SM-N)
10. Flexible specialty antenna (FWA-216)
11. Convenient carrying case (C-216)
12. Conference tablemicrophone adaptor (TM-10)
Section 1 General Information (Continued)
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1.3 PR-216 Controls, Connectors and Indicators
Section 1 General Information (Continued)
Page 4
nENVIRONMENTALMICON/ OFF SWITCH:
This switchturnstheoptionalEnviroMicor
Smart-Mic on and off.
(Set to right for ON and to left for OFF.)
oCHANNEL 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.)
pBATTERY COMPARTMENT: The battery
compartment features a hinged battery cover
and an alignment system that ensures proper
battery polarity. Battery installation and removal is
facilitated by simply manipulating the bottom of the
battery.
qAUDIO OUTPUT JACK: This stereo 3.5 mm
audio output jack accommodates any 32 to 125 ohms
headphone — either stereo or mono; also, charging
of rechargeable battery with
NBC 9-2C charger.
rEnviroMic GAIN CONTROL: (Optional)
sVOLUME CONTROL: This control has 50 dB of range to
adjust the audio output for a comfortable listening level
(clockwise for maximum level).
tRECEIVER STATUS INDICATOR: This LED indicatorwilldisplaythree functions:
a. Continuous illumination ----- No signal
b. Steady slow flash -------------- Receiving signal
c. Rapid flash --------------------- Low battery
Additionally there is an audible beeping to indicate a low battery.
uON / OFF SWITCH: This switch turns the receiver on and off.
vBUILT-INENVIRONMENTALMIC/PLUG-IN MICROPHONE: (Optional)
(See pages 8 and 9 for details.)
Battery Cover
Latch

1.4 M-216 Controls, Connectors and Indicators
Section 1 General Information (Continued)
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nCOMPAND AUTO/ OFF SWITCH:This switch overrides
the automatic selection of the companded channels to
non-companded operation (normally set to the right).
oCHANNELSWITCHES: These rotary switches
are set to the same channel as the receiver.
Actual frequency of operation must agree with
thereceiver.
(See page 14 for frequency selection chart.)
pBATTERYCOMPARTMENT: The
battery compartment features a hinged
battery cover and an alignment system that
ensures proper battery polarity. Battery
installation and removal is facilitated by simply
manipulating the bottom of the battery.
qAUXILIARYAUDIO INPUT JACK:
Allows transmitter to use line level, earphone
level, or fixed AUX as an audio source; also,
charging of rechargeable battery with NBC 9-2C charger.
rAUDIO“VOICE”MODULATIONINDICATOR:
This indicator is used in making adjustment with the
Audio Input Gain Control.
sMIC / ANTENNA JACK: This jack accepts an
electret type microphone having a 36” long cord with
a micro-mini 2.5mm mono plug. This jack is also used
for the screw-in specialty antenna when the auxiliary
audio input is used.
tPOWER/ BATTERY TEST INDICATOR: This LED indicator will illuminate
continuously when the unit is on indicating normal operation. When the battery voltage
drops below 6 volts, the LED will flash rapidly, indicating that a new battery or charging
is needed.
uOPTIONALMICMUTESWITCH: Thisswitchturnsoffthevoicefromthemicrophone
withoutturningoffthe transmitter carrier allowing the auxiliary input programtoremainon.
vAUDIOINPUT GAIN CONTROL: This is a microphone and AUX level input gain
control. This control is used with the “Voice” modulation indicator.
wON / OFF SWITCH: This switch turns the transmitter on and off.
Battery Cover
Latch

2.1 Operating the System
A. Beforeoperating 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
thereceiver and thetransmitter or that therechargeable batteries have
beenrecharged.
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).
B. Wireless microphone transmitter set up:
1. Connect the microphone to the transmitter by inserting the
microphone plug into the receptacle on top of the transmitter.
Note: The36-inchmicrophone cordfunctionsaspartof the
transmitter’s antenna. Thecord shouldbe extended. Coilingor
bunchingthemicrophone cordwill reducethe rangeofthe system.
2. When the power switchis turnedon, thegreen indicatorlightsup
indicating condition of battery and that the transmitter is operating.
3. While speaking into the microphone with a normal speech level,
observe the “voice” level indicator to ensure proper modulation. A
normal speech level should produce low to moderate luminescence,
and a loud voice should produce a full bright luminescence. With
the small screwdriver, set the audio input gain control up or down
until proper modulation is obtained.
4. The transmitter should be carried in a pocket or with the belt clip.
The lapel microphone should be clipped high on the lapel for best
performance.
Section 2 Operation
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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 LED indicator lights up indicating condition of
battery and that the receiver is operating. When the transmitter is
turned on the LED indicator should display a steady slow flash.
3. The receiver should be carried in a pocket or in the belt-clip pouch
with the neckloop cord or earphone cord fully extended.
D. System operation:
Caution: Checkthe hearing aidto be certain itis equipped with a“T”
or“MT” switchposition. The neckloopwill onlyoperate withhearing
aidshaving a“T” switch. Direct audioinput to thehearing aidmay
alsobe usedwith adirect audioinput cord(optional). Forbestlistening,
choosea hearingaid witha microphone whichcan beturned offwhena
directaudio input cordis being used(see figure 2).
1. Establish normal listening volume on your hearing aid with the
hearing aid set in the “M” position.
2. Switch to the “T” position on the hearing aid. Have the speaker
talk using the transmitter microphone with a normal speaking
voice.
3. Turn the volume control on the receiver clockwise (if volume is too
soft) or counterclockwise (if volume is too loud).
4. Now, alternate between the “M” and “T” positions on your hearing
aid with the speaker talking and adjust the volume on the receiver
until it is about equal in both settings.
Section 2 Operation (Continued)
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Page 8
Section 2 Operation (Continued)
2.2 Optional EnviroMic and Smart-Mic
The PR-216 may be equipped or may be retrofitted with the optional
EnviroMic or Smart-Mic feature for assistive listening applications where
both environmental sounds and the speaker’s voice from the transmitter
must be heard.
This built-in or plug-in omnidirectional environmental microphone has
been equalized to enhance speech discrimination when used with hearing
aids, headphones, or button transducers.
When the PR-216 with EnviroMic or Smart-Mic is used with a hearing aid
and neckloop or direct audio input cords, the hearing aid determines the
frequency response and sound pressure level (SPL) delivered to the ear
when the speaker uses the wireless microphone transmitter.
Note: Theneckloop willonly operate hearingaids havinga“T” switch.
Directaudio inputcord tothehearing aidmay alsobeused ifthe hearingaid
hasan audioinput cordshoewith alevel control. Forbest listening, a
hearingaid whichcan operate inthe “T” positiononly ispreferredwhen
usingthe PR-216with the EnviroMicor Smart-Mic.
Typical Hearing Aid
Functions
M: Microphone on—for normal use
T: Induction coil pick-up—for FM
MT: Position combines microphone
(M) and induction coil (T).
Optional on some hearing aids.
O: Hearing aid in “off” position.
Built-In
Environmental Mic
Option “P”
Micro-mini Jack
Gain Control
Plug-in
M-4020P
Microphone
Level
Adjustment
Audio Shoe
EDC Cord