®
Telex
Operating Instructions
™
Airman ANR 500 Headset
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General Description
The Telex Airman ANR™500 Active Noise Reduction headset combines design
features of a lightweight headset with the advanced techniques of electronic noise
reduction. The result is a comfortable light-weight headset that provides good
electronic reduction of low frequency ambient noise, while the cushion design provides
good passive reduction of high frequency ambient noise. To take advantage of this
improved listening environment, the Airman ANR™500 also features extended
response receivers for improved reproduction not only of radio communications, but
also of stereo music played back over the aircraft entertainment system.
The headset comes in a fixed-wing version for use in aircraft with medium to low noise
levels. This version can be plugged into an aircraft radio for standard monaural
communications or into an intercom system wired for stereo entertainment.
The Airman ANR™ 500 headset is approved for aircraft use under FAA TSO’s
C57a and C58a.
Design Features (see Figure 1)
Fitting and Comfort:
An adjustable ratcheted headband allows the wearer to make quick and easy
adjustments to fit a wide range of head sizes, while the gimbal mounted earcups
improve the headset comfort.
Control Module:
The power on/off switch and the stereo/mono switch are both located on the control
module. The control module can be clipped to a shirt collar or pocket, using the
clothing clip.
Boom Microphone:
A flexible gooseneck boom permits precise microphone placement. The boom rotates
120° to use the microphone on either side of the head. The microphone cartridge
features a noise-canceling electret element. The microphone amplifier is built into the
headset and operates on power supplied by the aircraft radio.
The microphone amplifier has an adjustable gain control to provide an output level
equivalent to carbon microphone levels. (Adjustment by a qualified avionics technician
is recommended.)
Cordage and Plugs:
The microphone cordage is protected inside the boom arm. Shielded wire throughout
the headset protects against RFI and EMI. Strain reliefs on all cords provide maximum
durability.
2
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HEADSET OPERATION
1. Connect the headset as shown in Figure 2.
2. Rotate the entire boom to wear the microphone on either the right or left side
of the head.
3. With the Airman ANR 500 headband resting securely on the top of the
head, check that the ear cups are centered over the ears. Proper perfor-
mance depends on proper fit of the headset.
4. For best noise canceling, position the microphone as close to the mouth as
possible and speak in a normal voice. (See Figure 3)
5. Select stereo operation if the headset is plugged into an aircraft intercom sys-
tem that is wired for stereo, otherwise select mono operation.
TO BATTERY MODULE OR
AIRCRAFT POWER MODULE
TO RADIO RECEIVER "OUT" JACK
TO RADIO MICROPHONE "IN" JACK
Figure 2: Connections
Figure 3: Microphone Placement
3.
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Microphone Gain Adjustment
The microphone gain has been factory-adjusted to the nominal level required
for normal radio operation and should normally not require adjustment. If
needed, adjustment by a qualified avionics technician is recommended. To
access the microphone gain, insert a small phillips head screwdriver through
the access hole in the headset (refer to Figure 4). Clockwise rotation
increases the microphone gain.
NOTE: The microphone gain adjustment does not have a stop; at one point the
gain will go abruptly from maximum to minimum and will remain at
minimum gain for approximately 30° of rotation.
Microphone
Gain Adjustment
Figure 4: Microphone Gain Adjustment
MICROPHONE BIAS VOLTAGE REQUIREMENTS
The boom microphone requires a bias voltage of 8-16 VDC through 470Ω DC
resistance, 150Ω AC resistance (per RTCA DO-170). If you are uncertain
whether your avionics equipment meets this requirement, consult the avionics
equipment manufacturer.
4.
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BATTERY MODULE BATTERY INSTALLATION
The battery module requires one 9 volt battery. Alkaline batteries are
recommended for best performance. Do not use nickel-cadmium
rechargeable batteries or lithium batteries.
1. To remove the battery door press
DETENT
down on the detent while sliding
the battery door over in the direc-
tion of the arrow, then lift up.
2. Install the battery as shown. The
y
unit will not operate properly if the
9V Batter
battery is installed incorrectly.
3. Replace the battery door.
Figure 5: Battery Installation
NOTES:
1. Avoid unplugging the headset while noise reduction is turned on, as this
could cause a loud popping sound in the ears.
2. If the batteries are low, the red LED will light on the battery module. Replace
batteries as soon as possible to ensure continued ANR 500 operation.
3. If the ANR operation shuts down due to low batteries, the Airman ANR 500
headset will function as a conventional headset.
OPTIONAL AIRCRAFT POWER SUPPLY MODULE
The power supply module is designed for use in negative ground electrical
systems only. Do not attempt to use with positive-ground electrical systems.
Figure 6: Power Supply Module
5.
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Specifications
Receivers:
Type: Dynamic
Frequency Response: 6dB re 1000 Hz over the range 350 - 3000 Hz
Sensitivity: 90 5 dB SPL (1 kHz, 1 mW input per earcup side)
Impedance: 300Ω stereo or 150Ω monaural mode
Stereo/Mono:
Switch located on the control module, allows stereo or monaural headset op-
eration
Microphone and Amplifier:
Element Type: Noise-canceling electret
Frequency Response: 300 to 5 kHz
Sensitivity: -51 3 dB (ref: 1V/µbar at 1 kHz with 12 VDC and 470Ω DC load,
150Ω AC load
Matching Impedance: 50-600 ohms
Gain Adjustment Range: 5 dB (clockwise rotation increases gain)
Operating Voltage(supplied by aircraft radio): 8-16 Volts DC
Microphone Interface:
Operates from a typical aircraft radio per RTCA DO-170; 8 to 16 Volts DC
with 470 ohms DC resistance, 150 ohms AC resistance
Power:
Switch: On/Off switch on control module.
Batteries: One 9V alkaline battery installed in the battery module ANR Battery
Life:
Operates 40 hours continuous until the red low battery light turns on. At that
point 4 to 8 hours of ANR operation remains.
Fail-Safe Mode:
If battery power is too low for normal ANR operation or if the power switch is in
the off position, communications input will be automatically routed to the
headset receivers.
6.
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General:
Cordage:
Straight cord from headset to battery module, 5.5 ft (66")
Radio Connections:
Receiver; 1/4" diameter stereo plug
Microphone: 0.206" diameter plug (PJ-068 equivalent)
Weights:
Headset only: 7 oz. (198g)
Battery module with battery: 17 oz. (482g)
Color:
Black
ORDERING INFORMATION
Product
Catalog number
Headset with Battery Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300735-002
Microphone Windscreen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59688-000
Headband Pad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 590561-002
Moleskin Ear Cushions (set of two). . . . . . . . . . . . . . . . . . . . . . . . 590619-001
Model PT- 300 Push-to-Talk Switch* . . . . . . . . . . . . . . . . . . . . . . . 63966-000
Zippered Pouch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57893-000
Clothing Clip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 590637-000
Battery Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 590564-001
Aircraft Power Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71046-002
*Foraircraft without a push-to-talk switch, a portablepush-to-talkswitchmustbe
used
7.
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LIMITED WARRANTY — VALID ONLY IN UNITED STATES AND CANADA
TELEX Communications, Inc. (“Telex”) warrants to the user, who originally purchased the product
delivered with this card, that the product will be free from defects in material and workmanship for
the following periods after such date of purchase: Material 36 months, workmanship 36 months.
Telex will, at its option, repair or replace, free of charge, such defective products subject to the fol-
lowing conditions:
1. Delivery of the product or parts postage prepaid to the Telex dealer, authorized service facility or
factory.
2. Determination by Telex that a defect exists and is covered by the limited warranty. Defects due to
alteration, repair by an unauthorized person, insertion of non-Telex parts, misuse, accidental
damage, use of the equipment for purposes other than those for which it was designed, and the
like, are not covered by this limited warranty and repairs thereof will be subject to normal service
charges.
3. Repairs and replacement parts are covered under this limited warranty only for the unexpired
term of the original limited warranty.
4. Products purchased from unauthorized dealers are not warranted.
5. You must fill out and return the attached registration card within 10 days after such purchase or
this limited warranty is void.
THIS LIMITED WARRANTY IS EXPRESSLY IN LIEU OF ANY EXPRESS OR IMPLIED WAR-
RANTY, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE WHICH EXTENDS BEYOND THE TERM HEREOF. THE REMEDIES
PROVIDED BY THIS LIMITED WARRANTY ARE THE ONLY REMEDIES AVAILABLE TO ANY
PERSON. NO PERSON HAS ANY AUTHORITY TO BIND TELEX TO ANY REPRESENTATION
OR WARRANTY OTHER THAN THOSE PROVIDED BY THIS LIMITED WARRANTY. TELEX
SHALL NOT BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES CAUSED
BY FAILURE OR OTHERWISE OF THE PRODUCT.
Some states do not allow exclusions or limitations of incidental or consequential damages or limi-
tations on how long an implied warranty lasts, so the limitations or exclusions herein may not ap-
ply to you. This warranty gives you specific legal rights, and you may also have other rights which
vary from state to state.
* HEADPHONES/HEADSETS/MICROPHONES DO NOT HAVE SERIAL NUMBERS ASSIGNED.
8
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CUSTOMER SERVICE
For information or technical assistance, call or write to Telex at:
Customer Service Department
Telex Communications, Inc.
12000 Portland Ave. So.
Burnsville, MN 55337 U.S.A.
(952) 884-4051
Domestic Toll Free: (877) 863-4168
(Collect calls not accepted)
All equipment returned for repair must be accompanied by documentation stat-
ing your return address, telephone number and proof of date of purchase,
along with a description of the problem.
Return equipment for factory repair to:
Customer Service Department
Telex Communications, Inc.
1720 East 14th St.
Glencoe, MN 55336 U.S.A.
(320) 864-3177
Warranty Repairs - If in warranty, no charge will be made for the repairs.
Equipment being returned for warranty repair must be sent prepaid and will be
returned prepaid.
Non-Warranty Repairs - Equipment that is not under warranty must be sent
prepaid to Telex. If requested, an estimate of repair costs will be issued prior
to service. Once your approval for repair, and repair of equipment is com-
pleted, the equipment will be returned on a collect basis. Collect charges may
be avoided by sending a signed check for payment in full along with your
signed estimate approval form (the estimate includes the shipping charge).
9
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Notes
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®
TELEX COMMUNICATIONS, INC. l 12000 Portland Ave. S., Burnsville, MN 55337 U.S.A.
38109-822 Rev C
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