Telex Headphones ANRTM 150 User Manual

Telex  
Operating Instructions  
Echelon  
ANRTM 150 Headset  
 
General Description  
The Echelon ANR 150 is a medium-weight aircraft communications  
headset. It features electronic noise reduction circuitry for improved  
reduction of aircraft motor and wind noise. The Echelon ANR 150 also  
features extended response receivers for improved sound reproduction  
from the aircraft radio and entertainment system.  
The Echelon ANR 150 noise reduction system may be powered from  
either a battery module or an aircraft power module. The battery module  
is designed for portable applications and uses one 9 volt battery.  
Operating time with alkaline batteries is 40 hours minimum. The aircraft  
power module is designed for permanent installation and provides power  
to the headset from the aircraft electrical system. The aircraft power  
module works with negative ground electrical systems.  
The Echelon ANR 150 headset features a stereo headphone plug and a  
stereo/mono select switch. The Echelon ANR 150 can be plugged directly  
into an aircraft radio for standard monaural communications or into an  
intercom system wired for stereo entertainment.  
FAA TSO C57a and C58a approved.  
Design Features (See Figure 1)  
Fit and Comfort  
A unique headband design distributes ear cushion pressure evenly over  
the entire ear with no pressure points, unlike conventional designs which  
apply more pressure on the bottom of the ear than on the top. An added  
advantage of this design is that the headset folds into an extremely  
compact shape for storage. A clamp adjustment on each knuckle adjusts  
to provide greater noise reduction or greater comfort. The earcups pivot  
on two planes to conform to any wearer. Detented sliders adjust the  
headband for best fit on any head size. A large head pad evenly  
distributes the headset weight on the head with no pressure points.  
Comfortable foam-filled ear cushions are standard.  
Boom Microphone  
A flexible gooseneck boom permits precise microphone placement. The  
boom rotates overhead to use the microphone on either side of the head.  
The plug-in microphone cartridge features a noise-canceling electret ele-  
ment. The cartridge unsnaps for easy replacement. A built-in microphone  
amplifier (electret version) operates on current supplied by the aircraft radio  
via the microphone jack.  
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. A separate plug connects the headset  
to either a battery module or an aircraft power module. The headset also  
has separate microphone and receiver plugs. The receiver plug is a stereo  
type, but a selector switch on the cord permits monaural operation.  
Page 1  
 
Microphone Bias Voltage Requirements  
The boom microphone requires a bias voltage of 8-16 VDC through 300 to  
1000 ohms. If you are uncertain whether your avionics equipment meets  
this requirement, consult the avionics equipment manufacturer.  
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.  
Installing a Battery in the Optional Battery  
Module  
The battery module requires one 9 volt battery. Alkaline batteries are rec-  
ommended for best performance. Do not use nickel-cadmium recharge-  
able batteries or lithium batteries.  
1. Slide the battery door over in the direction of the arrow, then up to  
remove the battery door.  
2. Snap the battery onto the battery connector and place the battery into  
the case.  
3. Slide the battery door back into place.  
Page 2  
 
Headset Operation  
1. Connect the headset as shown in Figure 2. Set the MONO/STEREO  
headphone switch to match the type of sound system in your aircraft.  
Figure 2. Headset Connection  
2. Rotate the entire boom overhead to wear the microphone on either  
the right or left side of the head.  
3. For best noise cancellation, position the microphone as close to the  
mouth as possible and speak in a normal voice (Figure 4).  
4. To activate noise reduction, plug the headset into the battery or  
power module. To turn off noise reduction, unplug the headset from  
the battery or power module.  
5. With the headband resting securely on the top of the head, check  
that the ear cups are centered over the ears. Reposition them if nec-  
essary by moving the headband sliders out or in. Proper performance  
depends on proper fit of the headset.  
6. Headband Pressure Adjustments:  
There are three pressure settings. Increasing the pressure will im-  
prove the seal between the earcup and the head for greater noise  
reduction. To change the pressure setting, remove the headset and  
fold the earcup inward as shown in Figure 3, then rotate the adjust-  
ment knob to the desired setting. Repeat for both earcups. Both sides  
of the headband should be set to the same pressure setting to keep  
the headband properly centered on the head.  
Page 3  
 
Figure 3. Headband Pressure Adjustment  
7.Volume Adjustment Procedure  
The following procedure is recommended to assure that there will  
be sufficient radio volume in the event of a loss of power to the  
headset.  
a.Turn the headset power off.  
b.Set the headset volume controls to the middle of their range.  
c.USING THE AIRCRAFT RADIO VOLUME CONTROL, adjust  
headphone volume for clear communication under typical  
operating conditions.  
d.Turn on the headset and adjust the volume controls ON THE  
HEADSET to achieve clear communication with noise  
reduction activated.  
Figure 4. Microphone Placement  
Figure 5. Volume Control  
Page 4  
 
Specifications  
Receivers and Noise Reduction Circuits:  
Reciever Type: Dynamic  
Frequency Response: 50 Hz - 1.5 kHz  
Sensitivity (Max. Volume): 95 5 dB SPL (1 kHz, 1 mW input per earcup  
side)  
Impedance (Max. Volume): Stereo: 300 ohms per side, Monaural: 150  
ohms  
Stereo/Mono: Switch in cord allows Stereo or Monaural headset  
operation.  
Noise Reduction Power Consumption: 50 mW nominal, 1.5W peak per  
side (dependent on noise level)  
Microphone and Amplifier:  
Element Type: Noise-canceling amplified electret  
Frequency Response: 100 Hz - 5000 Hz  
Sensitivity: -51 3 dB (ref:1 V/ µbar at 1 kHz with 12 Vdc 150 ohm AC  
load)  
Matching Impedance: 50-600 ohms  
Gain Adjustment Range: 5 dB (clockwise rotation increases gain)  
Operating Voltage (supplied by aircraft radio): 8-16 Vdc  
Microphone Interface: Operates from a typical aircraft radio per RTCA  
DO-170; 8 to 16 Volts DC with 470 ohm DC resistance, 150 ohm AC  
resistance  
Power:  
To turn Power on and off simply plug or unplug the battery or Aircraft  
Power Module.  
Batteries: One 9V alkaline battery installed in the battery module.  
ANR Battery Life: 40 hours minimum  
Fail-Safe Mode:  
If battery power is too low for normal ANR operation or if the power  
module is disconnected, the headset will perform like a standard  
headset maintaining communications with the aircraft radio.  
Page 5  
 
General:  
Cordage: Headset: Straight Y cord, 6 ft (1.8 m),  
Aircraft Power Module: Straight cord, 3ft (0.9 m)  
Headset Connections:  
Power: 3.5 mm 2 conductor right angle plug for connections to  
the battery module or aircraft power module.  
Microphone: 0.206" diameter plug (PJ-068 equivalent)  
Receiver: PJ-055 equivalent plug for receivers  
Stereo/mono selector switch in the cord  
Battery Module Connector:  
3.5 mm 2 conductor jack for connection to the headset.  
Aircraft Power Module Connectors:  
Input power from aircraft: Straight cord, 6 ft (1.8 m) with 12V  
fused power plug adapter.  
Output power to headset: 3.5 mm 2 conductor jack.  
Weights:  
Headset with foam cushions: 18 oz. (560g)  
Battery module with batteries: 3 oz. (85 g)  
Aircraft Power Module: 2.2 oz. (62 g)  
Color: Black  
Ordering Information:  
Echelon ANR 150 Headset, with electret mic, battery module, and  
carrying case . .................................................... Catalog no. 300714-002  
Battery module ................................................... Catalog no. 590564-002  
Aircraft Power Module ........................................ Catalog no. 71046-002  
Gel-filled ear cushions (package of 2) ................ Catalog no. 800027-002  
Foam cushions (package of 2) ........................... Catalog no. 800027-003  
Headband Pad ................................................... Catalog no. 800198-001  
Replacement electret microphone...................... Catalog no. 800136-002  
Windscreen (electret) ......................................... Catalog no. 800456-000  
Model PT-300 Push-to-Talk Switch* ................... Catalog no. 63966-000  
Zippered Pouch .................................................. Catalog no. 590061-003  
Clothing Clip ....................................................... Catalog no. 590637-000  
* For aircraft without a push-to-talk switch, a portable push-to-talk switch  
must be used  
Page 6  
 
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 following 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  
WARRANTY, INCLUDINGANY 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  
CONSEQUENTIALDAMAGES CAUSED BY FAILURE OR OTHERWISE OF THE PRODUCT.  
Some states do not allow exclusions or limitations of incidental or consequential damages or  
limitations on how long an implied warranty lasts, so the limitations or exclusions herein may  
not apply to you. This warranty gives you specific legal rights, and you may also have other  
rights which vary from state to state.  
* HEADPHONES/HEADSETS DO NOT HAVE SERIAL NUMBERS ASSIGNED.  
Page 7  
 
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  
When returning equipment for repair, please enclose an explanation of  
the problem. And, if the equipment is covered under warranty, please  
enclose a copy of your proof of purchase. The equipment must be  
accompanied by documentation stating your name, return address, and  
telephone number.  
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 completed, 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).  
Page 8  
 
Notes  
 
38110-010 Rev B  
 
4/02  

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