Sonetics 105309200A1 UHW-10 105-3092-00 User Manual Layout 1 Page 2

Sonetics Corporation UHW-10 105-3092-00 Layout 1 Page 2

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Wireless Headset Series

UHW-10/20 Under the Helmet

FHW-10 Over the Head

Operation Manual

7340 SW Durham Road •Portland, OR 97224 USA

Phone: 503-684-6647 •1-800-527-0555

Fax: 503-620-2943 •email: sales@firecom.com

www.firecom.com

Introduction

The UHW/ FHW series offers highly reliable wireless communication headsets for fire and

emergency truck operator applications. The UHW/ FHW series provides secured, digitally

encoded interference free communications. When operated as part of a wireless system, up

to 40 headsets can operate interference free in close proximity to each other1.

1- Although not recommended, under certain circumstances, it may be possible to operate up to 50 head

sets in close proximity.

Under-the-Helmet Headsets

Adjustable

headstrap

Volume control

Push-To-Talk (PTT) button

Adjustable headstrap

UHW-10 Under-the-helmet wireless headset with a red momentary PTT button for radio

transmitting.

UHW-20 Under-the-helmet headset with a black momentary PTT button to key in the micro-

phone

Fig.2

Over-the-Head Headsets

Push-To-Talk (PTT) button

Volume control

Adjustable headband

Adjustable

headband

Fig.1

FHW-10 Over-the-head wireless headset with a red momentary PTT button for radio transmitting.

All headsets include a microphone with water resistant membrane

and mic muff (cover) with retaining o-ring.

Proper Fit

When worn properly, this headset will provide significant hearing protection. If it is not worn

properly, the headset’s effectiveness in reducing harmful noise is severely compromised.

•The length or vertical fit of the headset ear dome is adjusted by the headband or head -

strap. Adjust as necessary to achieve a fit that ensures the headset ear dome completely

covers the ear.

•This headset is intended to be a left dress headset.

Rotating the mic boom in order to switch dress direction may damage the

boom or wiring.

Damage to the headband cable may result from rotating the metal head

band on the UH model in the wrong direction.

•For maximum comfort, wear the headset as far back on the head as possible, while ensur-

ing the ear dome still completely covers the ear. If discomfort is felt in the jawbone, you are

wearing the headset too far forward.

Caution

This Firecom headset provides 24dB noise attenuation when properly fitted to the user and

worn as instructed. Any modification to the hearing protector such as drilling holes in the

dome, painting or reforming the headband spring, will negatively impact the hearing protector’s

performance and hearing damage could occur.

Federal law requires the following statements:

“Although hearing protectors can be recommended for protection against the harmful effects

of impulsive noise, the Noise Reduction Rating (NRR) is based on the attenuation of continu-

ous noise and may not be an accurate indicator of the protection attainable against impulsive

noise such as gunfire.”

“The level of noise entering a person’s ear, when a hearing protector is worn as directed, is

closely approximated by the difference between the A - weighted environmental noise level

and the NRR.

Example

1. The environmental noise level as measured at the ear is 92dBA.

2. The NRR is 24dB.

3. The level of noise entering the ear is approximately equal to 92dB (A) – NRR.

Caution

For noise environments dominated by frequencies below 500 Hz the

C - weighted environmental noise level should be used.”

Always wear a hearing protector in areas that have been identified as high noise locations.

Headset Power Switch and Volume Control

A power switch with non detented volume control is provided. This control is located on the

bottom side of the right ear dome on the UHW-10/ 20 headsets, and on the top side of the

left ear dome on the FHW-10 headset. Volume should be set at a comfortably high audio level

to optimize performance but not so high as to cause audio distortion and hearing discomfort.

LED Indicators

All headsets have one green and one red externally viewable LED indicators located on the

top side of the left ear dome (same side as boom microphone).

These two LED s operate as follows:

Power off mode:

•Charging: red LED on

•Charge Complete: red LED off, green LED on.

Power on mode (charger not plugged)

•Headset not connected to base: green LED flashing rapidly,

red LED off.

•Headset connected to base: green LED on.

•Low Battery, headset connected or not connected to base: green LED flashing slowly,

red LED off.

Note: When the battery is low, the headset will also sound an

audible 3 tone pattern once every minute.

•Very low battery, headset not connected to base: green LED flashing rapidly, red LED

flashing slowly.

Note: When the battery is very low the headset will also sound an audible

6 tone pattern once every minute.

•Very low battery, headset connected to base: green LED on, red LED flashing slowly.

Power on (charger plugged)

•Charging, headset connected: green LED on, red LED on.

•Charging complete, headset connected: green LED on, red LED off.

•Charging, headset not connected: green LED flashing rapidly, red LED on.

•Charging complete, headset not connected: green LED flashing rapidly, red LED off

Microphone Placement

Place the microphone in front of the mouth and no more than 1/8" away from the lips as

shown in the diagram below. Placement of the microphone is critical for proper operation of

the noise gating feature.

If the microphone is positioned incorrectly, you

may experience a reduction or interruption in the

audio and or deterioration in clarity of intercom

and radio communication.

No more than

1/8" from lips

Mic Muffs

The headset microphone is covered with a washable, replaceable foam mic muff. This mic

muff helps prevent the “pops” and “hisses” that can occur from speaking into a microphone

that is close to the mouth.

To clean or replace the mic muff:

1. Remove the o-ring.

2. Slip the mic muff off the microphone.

3. At this time, you can decide whether

to clean or replace the mic muff.

If you clean the mic muff, use a mild detergent, rinse it out well and let it

dry completely before re-installing it on the microphone.

4. Slide the mic muff on the microphone.

5. Install the o-ring on the mic muff to secure it.

Replacement mic muffs may be ordered from Firecom

Intercom Communication

The UHW-20 headset has a black momentary PTT button located on the bottom side of the

right ear dome. Press and hold this button to activate the microphone for intercom communi-

cation. Radio transmitting is not possible with the UHW-20 model.

The UHW-10 and the FHW-10 models have a red momentary PTT button located on the

bottom of the right ear dome. The microphone on these two models is always live for internal

intercom communications. However, press and hold the red button to transmit over the radio.

Release the button to terminate radio transmission.

Pairing

When one or more wireless headsets is purchased with a base station, the headset will be

prepaired to the base station at the factory so the pairing procedure listed below will not be

necessary.

Pairing Procedure

1. Press and hold the pairing button on the front panel of the base station until the yellow

LED(s) on the front panel of the base station start flashing, indicating that the base station

has entered pairing mode. Once the base station is placed in pairing mode, the user has

approximately 15 seconds to place the headset in pairing mode.

2. Press and hold the PTT button, turn on power to the headset. After approximately 5 seconds,

the green and red LEDs on the outside of the left ear dome will start flashing in a relatively

fast alternating pattern. Release the PTT button.

3. Monitor the green and red LEDs on the left ear dome of the headset. After about 5-7

seconds, the alternating flashing pattern ends, the green LED will flash rapidly for two seconds

then the green and red LEDs resume normal operation (as stated in the section titled “LED

Indicators”) to indicate that the headset is paired and connected to the base station. The

respective LINK LED on the base station will illuminate steadily after flashing rapidly for two

seconds to indicate that connection to the headset has been established.

Mic muff

O-ring

Mic boom

Charging

All headsets have a 5.5 mm panel mounted charger jack located on the right ear dome.

A charger cable assembly with 5.5mm plug is provided with the headset. The unterminated

end of the charger cable can be wired to nominal 12V (11-16V ) from the vehicle. Plug the

terminated end of the charger cable into the headset charger jack (refer to the LED indicators

section for proper operation of the battery charging red LED indicator

NOTES:

1. Observe correct polarity when connecting the charger cable

to12V from the vehicle. Connect the white striped black wire

to +12V and the solid black wire to GND. This will result in a

positive center terminal of the 5.5m charger jack as shown in

the illustration.

2. Firecom does not recommend operating the headset while the headset is being

charged. It is recommended that the headset be charged only when it’s not

being operated and with the power switch on the headset turned off.

Reset

In rare cases, resetting the headset may become necessary. There are two ways the headset

can be reset:

1. While the headset power is turned off, access the reset SMT switch SW2 on the charger

board in the right ear dome. The switch can be accessed by removing the ear seal and

the top foam. Using a pen tip, depress and hold the switch down for 2 seconds, then

release. The green and red LED’s on the left ear dome illuminate momentarily, then turn

off. Turn the headset power on and the headset should resume normal operation.

2. Plug the charger plug into the charger jack on the right ear dome.

NOTES:

1. In case the battery is deeply discharged, no LED indication will be possible until

the battery is partly charged to an operable voltage level.

2. Plugging the charger plug into the headset at anytime will cause the headset

to reset even when the headset is connected to a base station. Resetting a

connected headset will result in losing the connection for about 10-12 seconds.

Care and Maintenance

Repairs or replacement of the headset should be immediately sought if you see any defect

such as holes or cracks in the ear domes, ear seals or headband.

Body oils, perspiration and hair care products will, over time, affect the ear seals. Inspect the

ear seals frequently for signs of wear and replace at approximate 6 month intervals along with

the mic muff (cover).

Do not remove the foam speaker cover.

–

Never remove the charging cable from the headset by pulling on the cord.

The headset should be unplugged at the jack location by pulling the

charger plug from the jack.

Wipe headset and ear seals with a mild soap and water mixture only. NEVER IMMERSE

ANY PART OF THE HEADSET IN WATER. Although the microphone is water resistant, to

ensure a longer life, keep the microphone away from moisture, when possible.

Do not store in direct sunlight or in areas of high temperature.

Specifications

Headset

Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104dB re 20 uPa @ 1000 Hz, 1 mW

Frequency Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .300Hz - 3.4 KHz,+/- 3dB

Impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32 ohms nominal per speaker

Weight (FHW-10) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19.50z

Weight (UHW-10/ 20) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17.80z

Microphone

Frequency Response . . . . . . . . . . . . . . . .Optimized for speech clarity and noise reduction

Max. Amb. Noise Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .125dB SPL re 20 uPa

MIC Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-44+/- 5db, 0dB=1v/ Pa

DC Bias . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Internally Biased

Frequency range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .300Hz – 3.4KHz

Noise Canceling . . . . . . . . . . . . .approx. 6.25 db / octave from 3.4 KHz down to 300 Hz

S/ N ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60db minimum

Impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Internally matched

- Range: 300'open field, 90'minimum from base station mounted on fire or emergency

truck.

- Digital encoding for secured communications

- Interference free communications for up to 40 headsets operating in close proximity.

- Immunity to interference from other communications devices operating in the entire

frequency spectrum from 30 MHz – 18 GHz.

FCC Compliance

Pending FCC approval, this device complies with FCC Rules Part 15. Operation is subject to

the following two conditions:

1 This device may not cause harmful interference.

2. This device must accept any interference that may be received, including interference that

may cause undesired operation.

Changes or modifications not expressly approved by Firecom Corporation can

void the user’s authority to operate the equipment.

- ThisproductcomplieswithFCCradiationexposurelimitssetforthforanuncontrolledenvironment.

- TocomplywithFCCRFexposurerequirements,thebaseunitmustbeinstalledandoperated20cm

(8inches)ormorebetweentheproductandallperson’sbody(excludingextremitiesofhands,

wristandfeet).

- Thisproductmaynotbecollocatedoroperatedinconjunctionwithanyotherantennaor

transmitter.

- thisphone(headset)hasbeentestedandmeetstheFCCRFexposureguidelines.MaxSARis

0.003W/kg.

FCCRFExposureWarning:

Power

- 3.7V rechargeable lithium Ion battery

- 8-10 hours of talk time

- Cycle life 500 cycles minimum

- Over voltage, under voltage, over current and over temperature protection.

- Charge source 12V nominal (11-18v). 0.25A minimum.

- Change time 3 hours max from deeply discharged state.

Environmental

- Operating temperature -10 to+70oC

- Storage temperature -25 to +85oC

- Meets standards SAE J1455 and J1113

- Chemical resistance corrosion and humidity per MIL-STD-810

Warranty

Two-Year Limited Warranty to the Original Purchaser

Sonetics Corporation warrants to the original purchaser of its products, that they will be free

from defects in materials and workmanship, under normal and proper use, for the period of two

years from date of purchase. Sonetics Corporation will repair or replace, at its option, any parts

showing factory defects during this warranty period, subject to the following provisions.

This warranty applies only to a new product which has been sold through authorized channels

of distribution. All work under warranty must be performed by Sonetics Corporation. All returned

products must be shipped to our address, freight prepaid, accompanied by a dated proof of pur-

chase. The purchaser voids this warranty if he, she or others attempt to repair, service or alter the

product in any way. This warranty does not apply in the event of accident, abuse, improper

installation, unauthorized repair, tampering, modification, fire, flood, collision, or other damage

from external sources, including damage which is caused by user replaceable

parts (leaking batteries, etc.). This warranty does not extend to any other equipment or apparatus to

which this product may be attached or connected. The foregoing is your sole remedy for

failure in service or defects. Sonetics Corporation shall not be liable under this or any implied

warranty for incidental or consequential damages, nor for any installation or removal costs or

other service fees. This warranty is in lieu of all other warranties, express or implied, including

the warranty of merchantability or fitness of use, which are hereby excluded. To the extent that

this exclusion is not legally enforceable, the duration of such implied warranties shall be limited

to two years from date of purchase. No suit for breach of express or implied warranty may be

brought after two years from date of purchase.

Notes

FIRECOM is a division of Sonetics Corporation

7340 SW Durham Road •Portland, Oregon 97224

800-527-0555 •503-684-6647 •Fax: 503-620-2943

Email: sales@firecom.com •www.firecom.com

The information in this document is subject to change without notice.

No part of this document may be reproduced in any form without prior written consent of Sonetics Corporation.

This document is part number 600-0074-00 RevA. Printed in China.

Sonetics 105309200A1 UHW-10 105-3092-00 User Manual Layout 1 Page 2

Sonetics Corporation UHW-10 105-3092-00 Layout 1 Page 2

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