Ops-Core RAC User manual

RAC™HEADSET
Operator’s Manual
OM101116-00 REV. C
Compatible with: FAST®Maritime, FAST Ballistic High Cut,
FAST Carbon, and FAST Base Jump Helmets

RAC HEADSET
Operator’s Manual
Headset Features
Headset Components
Included / Optional Items
Preparing Headset for Use
Installing Batteries
Attaching Headset to Helmet
Attaching Pile Fasteners
Moving the Microphone
Donning and Dofng Helmet with Headset
Understanding Headset Positions
Basic Donning
Using Ventilation Mode
Dofng
Using Wireless Earbuds
Headset Functions
Maintenance
Operator Notes
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RAC HEADSET
Headset Features
•3D Hearing Technology (3DHT)
By coupling a patented ear simulator design with binaural audio and advanced audio processing the RAC
Headset delivers hear-through audio that accurately preserves azimuth and elevation cues to provide
situational awareness. Smooth compression algorithms eliminate “clipping.”
•FAST ARC Rail Attachment
The RAC Headset attaches to the rear of the FAST ARC Rails leaving the top portion of the rails free for
mounting accessories, such as lights, cameras, etc.
•Noise-Cancelling Microphone
Mounts to left or right earcup.
•Integrated Microphone Mounting & Connection Point
Accepts mask microphones with U-173/U standard plug.
•Arm Articulation/Latch
Ventilate mode allows the ear cups to be set in ready position, near, but not pressing on the user’s head.
•Single Point Gimbal Attachment
360˚ adjustment instead of conventional adjustment systems.
•On/Off/Volume/Balance Control
Provides operator full control to personalize the listening experience to suit individual needs. Optional
Speaker/Ear Plug Switch used with Inductance Driver System to switch between speaker and earplug.

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•Ear Cushions
High performance to ergonomically t the head geometry, providing a better seal and increased noise
attenuation.
•Streamlined Stowage
Earcups rotate to the rear of helmet when not in use, creating a very low prole.
•Quick-Release Downlead Connection
Helmet/headset can be disconnected from the downlead, allowing users to easily remove the helmet as
there are no excess cables to consider.
•Inductance Receiver Earplug
Un-tethered double-layer hearing protection provides noise attenuation in excess of typical Active Noise
Reduction (ANR) equipped headsets. Earplugs are battery-free.
•Weight
1.1 lbs (500 g) base version
1.2 lbs (545 g) with earplug option
•Immersible
IP-67 immersible
IP-68 immersible to 3 m for short durations
•Environmental
Tested to MIL-STD-810G
•EMl
Tested to MIL-STD-461E
•Export Classication
EAR-99
•Available Colors
Tan, Black, Green, and Gray

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HEADSET COMPONENTS
Cable Guides
Cable
Earcup
Hear-Through
Microphones
Ear
Seals
Earcup
Battery
Compartment
Battery
Compartment
Volume / Function
Buttons
Mic Boom
Attachments
Points
Boom Microphone
Pivot
Arm
Button
Pivot
Arm
Button

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INCLUDED / OPTIONAL ITEMS
Items Included with Headset:
•(2) AAA Batteries (to install into earcups)
•Pile Fasteners (to attach to helmet for cable stowage)
•Cable Loop (for cable stowage)
•Utility Pouch (to store headset)
Optional Items (Specify When Ordering Headset):
•Earbuds (wireless and battery-free)
•Foam tips for use with earbuds (three sizes: Standard, Slim, and Large)
(2) AAA Batteries Pile Fasteners Cable Loop
Foam Tips
Earbuds
Utility Pouch

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PREPARING HEADSET FOR USE
To prepare the headset for use, you will:
1. Install the AAA batteries (one in each earcup)
2. Attach the headset to the ARC Rails on the helmet
3. Attach the pile fasteners to the helmet
4. Move the microphone to the other earcup (if needed)

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Installing the Batteries:
NOTE: Also follow the applicable steps below to replace the batteries.
1. Remove the (2) AAA batteries from the packaging.
2.Pry the ear seal away from the earcup by pressing the tab at the bottom.
3.Insert the battery into the battery
compartment making sure to align the
battery so that the polarity marks (+ and -)
on the battery align with the corresponding
markings in the earcup battery
compartment.
NOTE: Always replace batteries
from both earcups as a set, do not
mix-and-match batteries.
CAUTION: When performing Step 2, be careful not to damage the
rubber seal in the groove on the underside of the earseal.
INSTALLING BATTERIES
+
Positive
-
Negative
Rubber Seal

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INSTALLING BATTERIES
4.Reinstall the ear seal, ensuring that it is securely snapped to the
earcup all around the edges.
CAUTION: Be careful not to pinch the ear seal in the
groove when snapping it closed.
5.Repeat Steps 2-4 to install the other battery into the other earcup.
NOTE: Remove batteries before storing RAC Headset
for extended periods of time.

Attaching Headset to ARC Rails on Helmet:
NOTE: Before you begin, ensure that:
•The tab at the bottom of the headset is pointing down.
•The pivot arm button is all the way out (not pushed in) – rotate the pivot arm out to
the second click.
1. On one side of the helmet, align the headset in the rail as shown and slide the
bracket up into the rail until it clicks into the rst slot.
2.Repeat for the other side.
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NOTE: To remove the headset from the rails, lift the tab up (using
a at tool if needed) and slide the headset out, moving the pivot arm as
necessary to gain access to the tab.
ATTACHING HEADSET TO HELMET
Bracket
Pivot Arm
Tab
Pivot Arm Button

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Attaching Pile Fasteners to Helmet:
Use the pile fastener pieces included with the headset to stow the cable.
NOTE: Use the headset several times to determine the best position for
the pile fasteners. Steps 1 and 2 are provided as a guideline.
1. On both sides of the helmet,
attach the adhesive side of the
fastener to the helmet near the
ARC rail as shown.
2.Press the hook side of the cable
guides to the fasteners.
3.Thread cable loop around cable
and attach to the Velcro on the
back of the helmet.
ATTACHING PILE FASTENERS
Pile Fastener
Cable Guides
Cable Loop

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Moving Microphone to
Opposite Earcup (Optional):
NOTE: To make this task easier, rotate
the earcups to the stowed position behind the
helmet as shown.
3.Remove the screw that attaches
the cover to the other earcup.
4.Remove the cover.
MOVING THE MICROPHONE
1. Remove the screw that attaches
the microphone to the earcup.
2.Unplug the microphone from
the earcup.

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7. Place the cover at the attachment
point on the earcup from which
you removed the microphone.
8.Install the screw to attach
the cover.
MOVING THE MICROPHONE
5.Plug the microphone into the
other earcup.
6.Install the screw to attach the
microphone.

DONNING AND DOFFING
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Donning and Dofng Helmet with Headset:
Donning and dofng includes the following tasks:
•Understanding headset positions
•Basic donning
•Using ventilation mode
•Dofng
Understanding Headset Positions
The headset has four positions:
Use Mode
(earcups snug over the ears)
Ventilate Mode
(out one click)
Donning & Dofng
(out two clicks)
Stowed
(out two clicks, then rotated behind the helmet;
can also be used for donning)

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DONNING AND DOFFING
Basic Donning
1. With the headset in the stowed position,
don the helmet, fasten the chin strap, and
tighten all straps.
2.Rotate the headset earcups over the ears.
3. On both sides, press the pivot
arm buttons all the way in so that the
earcups enclose the ears completely and t
snugly against the head.

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DONNING AND DOFFING
4.Ensure that the ears are centered within the
earcups. If necessary, slide the earcups back
or forward within the pivot arms to adjust the
earcups over the ears.
5.Adjust the microphone over the mouth (within
¼ inch) for optimal performance.
6.Align the headset cable connector to the
matching alignment indicators on the adapter
cable or radio PTT cable and press the
connection together.
NOTE: This quick disconnect is
designed with a break away force of
10lbs to prevent neck injuries in the
event that the cabling becomes snagged.

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DONNING AND DOFFING
Using Ventilation Mode
If heat buildup occurs around the ears, pull the earcups away from the ears to the
rst click.
•The increased airow will reduce heat buildup.
•The audio will still reach the ears.
Out One ClickOut One Click

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DONNING AND DOFFING
Dofng
To doff the helmet, pull the earcups away from the ears to the second click. Unfasten the
chin strap, and remove the helmet (this position also permits donning).
Out Two ClicksOut Two Clicks

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USING WIRELESS EARBUDS
Using Wireless Earbuds with Headset (Optional):
Use the optional earbuds to increase hearing protection. The earbuds function
wirelessly and contain no batteries.
1. Select the largest tips to start and remove
the foam tips from the packaging. Foam tip
sizes are Slim, Standard, and Large (in case of
tting problems, try the next smaller size).
2.Thread the foam tips onto the earbuds.