Pilot Communications Liberty Series User manual

Liberty Series | “Biggest Bank For The Buck” PA-1771T
Originally introduced at the Oshkosh AirVenture@ 2001 Fly-In as the first ANR headset with built-in cell/satellite phone
jack, the PA-1771T continues to be one of the industry’s most popular, affordable ANR headsets. As one of our lightest
weight ANR headsets (11.9oz), this ANR combines 25dB (NRR) passive noise reduction and 18-22 dB of active noise
canceling. Made in USA
Features
Passive: 25dB (NR)
Active: Additional 18-22dB
30dB Noise reduction at 100Hz
Auto On / Auto Off Circuitry w/manual override
Electret noise canceling microphone w/ windscreen
Sheepskin head pad
Soft Leatherette Confor® Foam Seals
Cell/Satellite phone interface
Auxiliary audio interface for music
or audible checklist/warnings
Mono/stereo capability
Dual volume control
Custom padded headset case
Uses 9V alkaline battery
Battery life 25-35 hours
Weight: 11.9 oz (333 grams)
Five year warranty
Additional Model available: PA-1771TH Helicopter Model with coiled cord and U174/U plug.
Optional Accessories: Attachable L.E.D. Flashlight, Throat Microphone, Leatherette Windscreen, Twin Layer Gel Ear
Seals, Metal Headband, Cloth Ear Seal Covers
Table of Contents
Introduction ……... …………..………………………… 1
Features ……………………………………………….. 1
Fitting Your Headset …………………………… 2
Microphone Placement………………………………. 2
Volume Control………………..……….…………….. 2
Mono/Stereo Selector…………………...…………… 2
Battery Box….………………………….….…………… 2
A. Power Button ………………………….…2
B. LED Light ………………………….…2
C. Power Jack ………………………….…2
D. Battery Compartment Door……………. 2
Cell / Satellite Phone Jack ……………………….…. 2
Soft Headset Case ……………………………. 3
If You Have A Problem ……………………….…... 3
Taking Care of your Headset …..……….……. 3
A. Microphone Windscreen……….…….. 3
B. Ear Cushions …………….……………. 3
C. Communication Cord ………………… 4
Specifications …………………………………………… 4
Contact Information ………………………………….…4
Page 1

Liberty Series | “Biggest Bank For The Buck” PA-1771T Page 2
Fitting Your Headset
Wearing your headset properly is paramount to achieving both comfort and the best performance from your new ANR
headset. The headset should be placed on your head and slowly pulled down so that each ear cup is properly positioned over
each ear for maximum noise attenuation.
The headband can be tightened or loosened by using the hand adjustable knurled knobs on the slides of the headband so that
it fits your head properly. It should apply slight pressure on your head without being snug. You may need to make your final
adjustments in a high noise environment and with the ANR electronics turned on.
Microphone Placement
Your headset comes with a fully flexible microphone boom and a noise canceling electret microphone. The boom can be
rotated 360 degrees for left or right side use. Proper placement of the microphone is critical in order to achieve clear
communications. The microphone should be placed at the corner of your mouth approximately 1/4” away from the lips.
Volume Control (On Comm-cord splitter)
The PA-1771T is fitted with 2 individual volume controls, one each for right and left side of the headsets. The volume
control is located on one side of the triangular splitter on the comm-cord. The other side contains the mono/stereo selector.
When adjusting the volume control the pilot-in-command should adjust their volume control first with the audio system
turned on and the ANR system turned off. Then turn the ANR back on and adjust the individual sides of the headset.
Mono/Stereo Selector (On Comm-cord splitter)
Your headset comes standard with a Mono/Stereo selector switch which is located on one side of the triangular comm-cord
splitter. “M” indicates the mono position while “S” indicates the stereo position. The volume control is on the reverse side.
It should be noted that if you are using a monaural intercom and your headset is set in the stereo position, you will only hear
through one speaker on your headset. With a stereo intercom, you will hear true stereo in if the selector switch is set to the
stereo mode position.
Power Button (On Battery Box)
The push button on the battery box is the On/Off switch for your ANR headset. To turn power on, press the button down,
re-engaging the button will turn the power off. When the ANR system is turned on the green LED light on the faceplate of
the battery box will illuminate.
LED Light (On Battery Box)
The LED light indicates the power status of your ANR system. When the light is illuminated, the ANR system is turned on.
Power Jack (On Battery Box)
The power cord from the headset plugs into the power jack on the face plate of the battery box.
Battery Compartment (On Battery Box)
The ANR System is powered by one 9V alkaline battery. Battery life is estimated to be 25-35 hours depending on level of
noise in the environment. Battery life is also affected by age, and extreme temperatures (hot or cold). To change the battery,
simply slide the battery plate off of the battery box and insert the new battery. Reinstall the battery plate and you’re ready to
go.
Cell/Satellite Phone Capable
In an emergency, having the capability of being able to place a cell phone call from your aircraft is one of the reasons
PILOT has installed a Cell/Satellite jack on the headset. Located on the boom side ear cup, a 3.5mm jack has been installed.
It will work with 90% of cell phones in the marketplace. An adapter may need to be purchased from us in order to utilize
this feature. The jack can also be used to plug in your music input source.

Liberty Series | “Biggest Bank For The Buck” PA-1771T Page 3
Custom Padded Headset Case
We provide you with a custom padded headset case to protect your ANR headset and to house your battery box, headset and
comm-cord. You should treat you headset like you would treat any other electronic product of value. Keep clean, and keep
it out of extreme temperatures.
If You Have A Problem
Some potential problems you may encounter are listed below with the possible solution for the problem:
Problem: Audio is heard in only one ear
Solution: Check Mono/Stereo selector for proper setting
Problem: Communication, but the ANR system is not working
Solution: Make sure the headset is turned on. Check LED. Check to make sure the battery is fresh.
Problem: ANR works but no communications.
Solution: Check the headset and intercom volume controls to see if they are set too low.
Problem: No ANR and no communications.
Solution: Check all cable connections both on Battery Box and on the headset.
Problem: Whistling & squealing sound or cricket sound
Solution: Check to see that the outer foam pad in still in-place in the center of the ear seal. If the foam pad is missing,
check your headset case to see if it has come loose. If not, contact PILOT.
Problem: “Motor boating” or low rumbling sound with headset turned on in a quiet environment.
Solution: This could be caused by a small pressure change possibly caused by opening a cabin door or possibly by turning
your head and causing a leak between your ear headset and the ear seal. Check your ear seals for wear or possibly the
headsets were stored improperly and the cushions were squeezed into an abnormal shape. A low battery can also cause this
problem.
Taking Care of Your Headset
To insure the full life of your headset. keep it clean and free of dirt and you will extend the headset’s life giving you many
years of flying pleasure.
Clean your headsets with non-alcohol wipes or a soft slightly cloth dampened with water and a mild soap. Never use
alcohol. Plastic parts dry out or fray when exposed to alcohol based products. Headband, ear cups, ear seals and cords can
be lightly cleaned but one should be careful around the microphone and speakers on the headset.
Mic Windscreen
Pilot USA recommends periodically replacing the microphone windscreen if necessary. The foam microphone windscreen
helps eliminates the popping “P”s and “T”s and annoying breath puffs when you’re communicating with the headset. The
foam microphone windscreen also helps protect the microphone from moisture and other elements that may cause damage
to the electronics. You may use mild soap and water to clean your foam windscreen. Place the foam windscreen in mild
soapy water. Rinse and make sure the windscreen is fully air dried before reattaching to the microphone.
Ear Cushions
Ear seals also need periodic replacing. Depending on how much you fly, temperature (extreme heat or cold) also influences
the life span of your ear seals. We have several types of ear seals on our headsets. Generally, PVC, foam and silicone gel
style ear seals can be wiped off with mild soap and water. Do not submerge the ear seals in water. All three types of our
ear seals have vent holes and water would enter the ear seal’s vent holes ruining the ear seal.

Liberty Series | “Biggest Bank For The Buck” PA-1771T Page 4
Communication Cord
Take care of your communication cord. Wires in the cord can break if abused. Always disconnect them by disconnecting
the plugs, not by pulling the cords. Pulling on the cord, instead of the plugs is a major cause of headset repairs – it causes
wire breaks and static. We recommend storing your headset in a headset case or flight bag and keeping the cords free of
obstruction to reduce wear and tear on your headset.
Specifications
Microphone:
Generating element - electret condenser
Polar Pattern—Bi-directional
Frequency Response—150-4000 Hz
Impedance—50 ohms @ 16 VDC
Sensitivity– 100dB @ 1mW input
Power Requirements— 8-16 VDC
Current Drain—8 mA at 8 VDC
Color/Case Materials —Black ABS
Weight — 6 grams
Mating Connector—U173/u
Transducers:
Audio speaker impedance: 300 ohms
Nominal Power: 100 mW
Max Power: 200 mW
SPL: 102+2dB at 1 KHz
Effective DNC Frequency Range: 30 Hz-8000Hz
Active Noise Reduction: 18-22 dB at 100 Hz
Maximum Ambient Noise Level: 120 dB SPL
Pilot USA Inc.
70 Maxwell, Irvine, California 92618
Toll Free: 1-888-GO-PILOT Tel: [phone] Fax: [phone]
www.pilot-usa.com [e-mail]