Flightcom DENALI D50ANR User manual

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FLIGHTCOM
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Passive & Active Noise Canceling Models
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Operation Manual
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7340 SW Durham Road, Portland, OR 97224 USA
www.flightcom.net • e-mail: [email protected] • 800-432-4342 or 503-684-8229
Flightcom is a registered trademark of Flightcom Corporation.
Specifications subject to change without notice. ©2012 Flightcom Corporation.
P/N: 600-0033-20 Rev. D
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To install or replace the ANR battery, open the battery door by sliding the door in a downward
motion until it unlatches and lift up as shown in diagram A.
Slide the 9-volt battery in with the larger battery contact on the bottom. f you put the battery in
upside down, it will not activate. See diagram B.
Battery life is dependent on the ambient noise in the aircraft, but should provide a minimum of
20 hours of continuous use.
Bias voltage supplied to the microphone must come from voltage and resistance
ranges specified below. Voltages supplied in excess of those stated in the specifications can
cause microphone failure and void the warranty. The mic audio signal is present between the
ring and barrel of the mic plug; tip is reserved for transmit keyline.
Large C ntact n B tt m
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Stere /M n Switch
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Shielding Full floating Full floating
w/independent ground w/independent ground
Weight 11.0 ounces 12.9 ounces
Temperature Sensitivity Not to exceed 156°F Not to exceed 156°F
Battery Life Not applicable 20 hours of continuous use
Sensitivity(@1mW in dBspl) 104dB
Frequency Response 90Hz—20kHz
mpedance 300 ohms stereo/ch.—150 ohms mono
Total Harmonic Distortion (@1kHz) <.15%
Maximum Power nput 250 mW
Noise Reduction Rating 21dB
Type Noise canceling electret condenser
w/constant-gain preamp
DC Bias Voltage 8-16 volts
Supply Source Resistance 220-2200 ohms
Frequency Response (±6dB) 420Hz-6.4kHz
Sensitivity (@ 114dBspl*) 1.3V
Noise Rejection Ratio (@1kHz) -46dB
Total Harmonic Distortion (@ 1kHz) <0.3%
mpedance 500 ohms
Maximum Speech Level 112 dBspl*
Maximum Ambient Noise Level 132 dBspl*
*Sensitivity measurements referred to 0.0002 ubar (dynes/cm2) @ 1kHz. Microphone
measurements made with 10-volt supply with a 1000 ohm resistor.
Contact Flightcom for the most current ANR specifications.
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FLIGHTCOMTM
TM
- Stereo, Active Noise Reduction
- Stereo, Passive
- Mono, Passive Helicopter w/U174 plug
General Aviati n Denali 600-3033-20 manual:Lay ut 1 2/9/12 1:58 PM Page 1



"
Denali headsets accommodate the differences in head shapes and sizes of the pilot population
through angled ear domes, the shape and surface area of the ear seal, low side force and a light-
weight design. When worn properly, you will feel very little pressure on top of the head, which is a
refreshing departure from the traditional fit and feel of an older style aviation headset.
Additionally, personalized fit adjustments can be made in the length of the headband, the rotation
of each ear cup, both side-to-side and up and down, and the placement of the boom and microphone.


Your new Denali ear seals are permanently attached to the hard
plastic backing plate. Do not attempt to remove the ear seal from
the backing plate.
To remove the ear seal assembly, look inside the ear seal opening,
half way down either side of the ear cup. You will notice a small
cut-out just large enough to place your finger tip under the backing
plate. Pull the backing plate (with the ear seal) away from the ear
cup. Note: it will take a bit of force and the ear seal will pop off of
the ear cup.

 Contrary to popular belief, wrapping the headset cords around the headband is not
a proper storage method. n fact, by doing so you risk damaging the com cable, splitter, or battery
box. nstead, loosely loop the headset cord in your hand and place the cable in the headset bag,
next to the headset.

To clean the Denali headset, earseals, or headpad, dampen a non-abrasive cloth with water and mild
soap. After cleaning, wipe dry with a soft cloth. Note: do not allow any water to seep into the ear
dome.
 Do not immerse the headset in water. Never use bleach on ear seals, headpad, or
any other part of the Denali headset.
• nsert the larger headset plug into the jack marked "headphone" or "phone" (on your aircraft
com panel, intercom or radio).
• nsert the smaller headset plug into the jack marked "microphone" or "mic."
• Set the stereo/mono switch on the cable splitter box to the "M" position. f connecting to a
stereo intercom, set the switch to the "S" position.
• f you are not sure about the type of intercom in the aircraft, test the headset by selecting the
"S" position and talking into the headset. f you hear sidetone out of one ear only, you have a
mono intercom. Move the switch to "M."
7 .02(&,.%&+The stereo/mono switch is located on the back of the in-line battery box,
near the clip.
• Adjust the headband sliders for proper fit and comfort, making sure the boom is being worn on
the left side of the head.
• ndividual volume controls are located on the front of each eardome to reduce or adjust the
level of audio in each headset ear cup.
7 .02(&,.%&+Once the 9-volt battery is installed, turn the ANR power to the ON
position, indicated with the symbol "|". The OFF position is indicated with an "o". A blinking
green LED indicates the active noise cancellation circuit is ON. A blinking red LED indicates
low battery life. (For proper battery installation, see the diagram in the Care and Maintenance
section of this guide.)
f the aircraft does not have a built-in push-to-talk (PTT) switch, a portable PTT switch must be
installed in order to use the radio.
An avionics technician should optimize the master gain control located in the aircraft radio
whenever adding a new model microphone to the system.
30&.5&0612&,To conserve battery life, ANR models will automatically shut off
the ANR circuit if no audio is sensed by the headset for a period of 28 minutes. Full passive
performance is maintained. ANR operation is reactivated by turning the ANR power switch to
the OFF position and back to the ON position, indicated with the symbol "|".


Do not store your Denali headset in temperatures that exceed 156° Fahrenheit. Do not
leave it in the sun, or hanging on the yoke of your aircraft, or exposed in conditions where the surface
area of the headset might exceed this high temperature.
Under certain conditions, a mic muff might be necessary. A mic muff is provided for your convenience.
We also recommend that in the interest of hygiene, you replace your ear seals at least annually.
• Hold the Denali headset in front of you. Place the dome that holds the mic boom in your left hand.
• Extend the headband to full extension. When you have reached the
maximum headband extension, the headband slider will stop. Make
sure you have extended the headband equally on both sides.
• Place the headset on your head. f the domes feel as if they’re sitting too
low on your ears, starting on one side of the headset, move the headband
slider to a smaller position, ensuring both sides are adjusted equally.
 While wearing the Denali, you should feel very little pressure
on top of your head. TH S S NORMAL AND OPT MAL.
f you’re an experienced headset wearer, you may have a tendency to reduce
the headband size until you feel a familiar pressure on the top of your head or
at the top of your jawbone. For Denali, this indicates you’ve actually reduced
the size of the headband too much. Extend the headband in a downward
direction, on both sides, until the top of the headset seems to "disappear."
Check for a secure fit by shaking your head from side to side. Denali should
remain firmly in place—without creating undue pressure on the top of the head.

Denali’s ear domes rotate not only in an up and down direction, but also from side-to-side. This allows
for maximum adjustment around the ear and jaw area.
• Once the headset is in place and the headband is
adjusted properly, you may want to individually rotate
the dome and ear cup around each ear, to determine
the most comfortable position.
• f during an extended flight you start to feel a bit of a
pressure point, adjust the ear cup or the length of the
headband to restore comfort. Outward dome rotation
nward dome rotation
• Adjust the mic boom for proper fit and comfort. Place the microphone no
more than 1/8" from lips, at the corner of the mouth. This is critical to the
performance of the noise-canceling electret microphone.

All Denali mic booms are shipped from the factory for wearing
on the left side of the head only. Because the domes are canted to match the
angle of the ears, the boom can ONLY be worn on the left side.
Rotating the boom beyond the “stop” will cause non-warranty damage
to the boom
0-1/8" from lips


As with most electronic equipment, it’s important to protect your Denali headset from exposure to the
elements. Do not leave the headset on the seat of a plane or car, or in intense, direct sunlight exceeding
156° F. Do not leave the headset out in the rain or in freezing temperatures. Return the headset to its
carrying case and store in a cool, dry area.
Cut-out
ear seal
backing plate
ear cup

Lay the gasket (for ANR models only) flat on the ear seal backing plate. The gasket must have no
wrinkles. Carefully position the backing plate (with the gasket) on the ear cup and apply even pres-
sure with your fingers spaced around the circumference of the ear seal/backing plate and then snap
on to the ear cup. Note: the backing plate must not have any space between it and the ear cup.
Your new Denali headpad is permanently attached to the backing plate. Do not remove the headpad
from the backing plate.
To remove the headpad, pull on each side of the headpad and it will snap out of position on the
headset. To install the headpad, line it up to the top of the headset and then snap into position.

headphone
.206" phone plug
microphone
ground microphone hot
no connection
program audio ground (headphone)
microphone
ground and shield
microphone hot
left on stereo (300)
program on mono (150)
headphone
.25"phone plug
ground
and shield
right on stereo (300)
ground on mono
Helicopter Plug
General Aviati n Denali 600-3033-20 manual:Lay ut 1 2/9/12 1:58 PM Page 2