Comfort Digisystem DC10 User manual

Comfort Digisystem User manual
Comfort Digisystem
Conference
Microphone
DC10
North America
/ English

2
Conference Microphone DC10
User manual
Table of Contents Page
1) Introduction to the Comfort Digisystem 3
2) Regulatory information 3
3) Functions of the Conference Microphone DC10 4
4) Functions - Charger unit 4
5) Included accessories 4
6) Getting started 5
7) Listening modes 5
8) Menu 6
9) More functions 8
10) Radio range and channels 9
11) Trouble shooting 9
12) Battery maintenance 10
13) Technical data 10
14) Service and warranty 10
15) Important safety instructions 11

3
Conference Microphone DC10
1) Introduction to the Comfort Digisystem
Thank you for choosing Comfort Digisystem. The products are easy to use, whether you use a hearing aid or not.
Before using the product, please read this User manual carefully.
Using the Conference Microphone DC10 transmitter, the signal is transferred digitally, resulting in an excellent clear
sound. The Comfort Digisystem products feature SecureStream Technology – a unique, patented digital technology
allowing eavesdrop-secure radio transfer in real time.
PSE (Perceptual Speech Enhancement)
The Conference Microphone DC10 is equipped with high-power sound processing that is used in the two omni modes
(omnidirectional). The method is based on emphasising meaningful parts of speech. Please visit our website for more
information on how this technology works.
2) Regulatory information
Comfort Digisystem products are not to be used as a substi-
tute to the hearing aids and should be used in accordance
with the specifications and recommendations provided by
your physician.
It is recommended that customers keep the volume control
in the lowest position, when turning on the device. If not, the
sound could potentially cause harm to the customers’ hear-
ing.
Comfort Audio is not liable for damages arising from usage of
the equipment not in accordance with the instructions provided
by Comfort Audio. Comfort Audio shall not be liable for perform-
ance problems and/or damages caused in any way by customer’s
modification of any part of the equipment.
Federal Communications Commission Statement, This device
complies with part 15 of the FCC Rules. Operation is subject to the
following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including
interference that may cause undesired operation.
FCC ID: UOJ-DG03T
Contains FCC ID: R47F2M03MLA
Industry Canada, This device complies with Industry Canada
licence-exempt RSS standard(s).
Operation is subject to the following two conditions:
(1) this device may not cause interference, and
2) this device must accept any interference, including interfer-
ence that may cause undesired operation of the device.
IC ID: 6769A-DG03T
ETL
Conforms to UL Standard for Safety for Audio, Video and
Similar electronic apparatus – Safety Requirements UL 60065,
Issue:2003/06/30 Ed:7 Rev:2007/12/11
Certified to CSA Standard for Safety for Audio, Video and
Similar electronic apparatus – Safety Requirements CAN/
CSA-C22.2 No. 60065:03, Issued 2003/04/01 Ed:1 Amendment
1:2006
Intertek ETL Control number: 4002355
WARNING!
Changes or modifications not expressly approved by the party
responsible for compliance could void the user’s authority to
operate the equipment.
NOTE:
This equipment has been tested and found to comply with the
limits for a Class B digital device, pursuant to Part 15 of the FCC
Rules. These limits are designed to provide reasonable protec-
tion against harmful interference in a residential installation.
This equipment generates, uses and can radiate radio frequency
energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communi-
cations. However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can
be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of
the following measures:
-- Reorient or relocate the receiving antenna.
-- Increase the separation between the equipment and
receiver.
-- Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.
-- Consult the dealer or an experienced radio/TV technician
for help.
DANGER!
DO NOT USE the COMFORT DIGISYSTEM products if
you have a PACEMAKER or other implanted device.
The Comfort Digisystem products could cause the
pacemaker or other implanted device to malfunction
and cause serious injury or death.

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Conference Microphone DC10
3) Functions of the Conference Microphone DC10
Function indicator
Mode selector
Charging socket Mic/line in
Multifunction socket
Answering button
for Bluetooth
Pairing button
Menu control/
volume control for Bluetooth
On / Off
4) Functions - Charger unit
USB-socket
(for service)
Charging
socket
Mic in
Line in
Multifunction
socket
5) Included accessories
• Charger A11
• Charger unit
• Cable
• Split cable
• Necklace x 2
• Clip on microphone

5
Conference Microphone DC10
6) Getting started
Charging
The Conference Microphone DC10 is chargeable. Charge
the DC10 at least five hours before you use it for the first
time. An empty battery is fully charged within five hours.
During charging, the function indicator shows red and
a lightning bolt appears through the battery symbol in
the display. Once the battery symbol is filled with green
columns, the unit is fully charged and switches to auto-
matic float charging.
Connecting a charger to the
Conference Microphone DC10
First time use
Switch on the transmitter by pressing the On/Off button
for around two seconds.
Other functions are explained later in this manual.
Please note:
Only use the charger supplied by Comfort Audio.
Changing the battery without the assistance of an
authorized dealer will void the Limited Warranty.
- Zoom
- Music
- Omni – Wide
(default position)
- Omni – Narrow
7) Listening modes
The Conference Microphone DC10 always starts in
Omni Mode Wide as default.
The position is easily changed using the mode selector
on the long side of the unit.
The various microphone positions are located in the
following order:

6
Conference Microphone DC10
8) Menu
Menu control
Three different selections can be made:
To access the menu, press the menu control:
Back
Communication
Channel
Pair
Bluetooth
Sound
Treble and Bass
Equalizer
Advanced settings
Inputs
Mic/Line in
Charger unit
Settings
Charge
Language
Key lock
Name
Factory reset
Activate key lock
About
Scroll up
Press/select
Scroll down
Back (relates to both the main menu and submenus)
Here you can choose to return to the menu and to the
main display.
Communication
Channel
To use the receiver and the transmitter together, they
must be set to the same channel. The transmitter and
receiver are set to the default channel by the manufac-
turer.
Change channel:
1. Choose Channel in the menu.
2. Select a new channel using the menu control.
Channel information is also given when the units are
paired.
FFC (Free Frequency Check) indicates in green the suit-
able frequencies for the specific environment.
Please note! Switch off any other Digisystem transmit-
ters in your room for correct result.
FFC dB indicates the noise level in dB for each channel.
The higher the (-)value, the lower the risk of interfer-
ence.
Pair
To use a receiver and transmitter together, they must be
paired. All transmitters and receivers are default paired
at the factory and will work together.
NB! To prevent eavesdropping, a new code key must be
generated and transmitted between the units by pairing.
Transmitting/receiving of pairing information along
with a new code can be performed from any Comfort
Digisystem unit with a display.
To pair units without a display, see section Pairing (via
pairing button) for more information. Pairing information
or a new code key can be received by several activated
units.
Pairing (via menu)
1. Choose Communication - Pair
2. Select Receive info on one unit. Ready to
receive pairing info is shown in the display.
3. Select New code on the other unit; select
Yes.
4. Generate new code and send info? is shown in the
display. Select Yes (Now both the channel and the
coding information have been sent, and sound
transfer is eavesdrop-secure).
5. To pair another unit into your coded system, select
Send info instead on one of your paired units.

7
Conference Microphone DC10
Pairing (via pairing button)
(The only way of pairing units without a display, with the
pairing button)
You can activate the Pairing function via the pairing
button.
1. One brief press of the button opens the
Pairing menu.
2. Two brief presses activate the Send info function.
3. One long press activates the Receive info function.
Bluetooth
TM
Here you can activate Bluetooth to be able to pair the
Conference Microphone DC10 with a telephone or
mobile. For detailed user information, see chapter
More Functions - Bluetooth .
Sound
Treble and Bass
Treble and Bass control that allows simple adjustment
of the unit’s equalizer. Press the answering button to
return to the menu.
Equalizer
You can obtain fine tuning of the sound characteristics
by changing the level at various frequencies, from low to
high frequencies. The level can be increased or reduced
at the mid-range frequencies 63 Hz, 125 Hz, 250 Hz,
500 Hz, 1 kHz, 2 kHz, 4 kHz and 8 kHz. Press the
answering button to return to the menu.
Advanced settings
Here you can adjust PSE compensation in the modes
Omni – Wide and Omni – Narrow. Settings are saved
separately for each mode.
The effect of increasing this value is that the volume will
increase when the overall sound level in the environ-
ment raises. If the surrounding sound is too high, you
can increase PSE compensation and the overall sound
level is raised.
For someone who feels that the volume gets too loud in
noisy environments, PSE compensation can be reduced.
On delivery, Omni – Wide is set to +2 and Omni – Narrow
to +6.
Inputs
Mic/Line in
This is where the function for the mic/line in socket is
selected:
- Line in (for TV or computer etc.)
- Microphone in (for an external microphone, e.g. a
clip-on microphone)
- Headphones out (for testing the unit with headphones)
Here you can also adjust the level for Line in, Micro-
phone in and headphones:
- Line gain
- Mic gain
- Headphones
When connecting a signal source to Line in (e.g. a TV),
Line in mix is selected to also receive surrounding
sound through the Conference Microphone DC10.
Charger unit
Here you can adjust the level for Line in and Microphone
in. Line in mix can also be selected for use with charger
unit.
It is not possible to use both sockets at the same time.
In this case an error-message is shown: Disconnect
from Mic/Line.
Settings
Charge
Here you can activate the Auto Power Off function to
shut down the unit automatically during charging. If
Auto restart is activated, the unit will start automatically
when the charger is disconnected or loses power.
Language
For selection of menu language.
Key lock
When this function is activated, all buttons are locked
automatically as soon as the display fades out. It can be
quickly activated; see the section Activate key lock .
Name
Here the text to be displayed is selected. Choose sym-
bols with the menu control. Select to save and xto
close without saving. To move the cursor during editing,
use the symbols > and <.
Factory reset
Resets the unit to the factory settings. Also deletes all
pairing information (SST and Bluetooth). To prevent
eavesdropping a new code key must be generated.
Activate key lock
Here you can activate the key lock directly when the
menu control has been pressed. Or you can press the
menu control, followed by arrow up (mode selector) on
the long side of the unit.
About
Software information.

8
Conference Microphone DC10
9) More functions
Function indicator (LED)
The function indicator shows the unit's mode settings.
Music position
Flashes green once every three seconds.
Omni position – Wide
Flashes green twice every three seconds.
Omni position – Narrow
Flashes green three times every 3 seconds.
Zoom position
Flashes green four times every 3 seconds.
During charging the indicator shows red. When the
charging is completed, the indicator shows green.
The indicator stays red even when the battery is fully
charged, if the unit is On during charge.
When the battery level gets low, the indicator flashes
red. (Check the battery status on the display)
Once the unit has been set to receive pairing
information, the indicator flashes green quickly.
When receiving pairing information, the indicator shows
green for three seconds.
When sending pairing information, the indicator flashes
red five times.
When the pairing mode for Bluetooth has been
activated, the indicator shows blue.
When a Bluetooth telephone has been successfully
connected, the indicator flashes blue five times.
During an ongoing telephone call, the indicator flashes
blue every second second.
When Clear settings is selected, the indicator flashes
blue ten times.
Bluetooth
The Conference Microphone DC10 can be connected to
two Bluetooth telephones at the same time. The person
you are talking to can hear you through the microphones
on DC10. His/Her voice is sent to a paired Digisystem
receiver.
When Bluetooth is activated in the menu,
the Bluetooth symbol is shown in the display
If only one telephone has been paired (and connected)
with the unit, the figure 1 appears at the Bluetooth
symbol in the display. If two telephones have been
paired (and connected) the figure 2 appears instead.
Some DECT telephones are only connected during
incoming or outgoing calls. In such cases, the unit can
also display a 1, even if a mobile and a DECT telephone
have been paired with the unit.
The DC10 supports both headset and handsfree profiles
for Bluetooth. The profile is chosen automatically during
pairing.
Application
Pairing with telephones:
To pair the unit with telephones, see the section
Communication .
Activate Bluetooth:
Enter the menu Communication - Bluetooth - Enable
Bluetooth menu:
When BT only is selected, the transmitter is active only
when the telephone call is connected via Bluetooth or a
headset cable is connected and activated.
Pair Mobile (Communication - Bluetooth - Pair BT-
Pair Mobile) (code 1234) is used to pair a mobile with
the DC10.
Pair Phone (Communication - Bluetooth - Pair BT- Pair
Phone) (code 0000) is used to pair a landline-based, wire-
less (DECT) or mobile phone with the DC10.
Select Clear settings (Communication - Bluetooth -
Pair BT- Clear settings) to clear all information about
paired units.
Please note: After this the Bluetooth units have to be
paired again (so that Bluetooth can work).
You can use Mix level to select how loud your own voice
is during a phone call.
Answer an incoming call:
Press the answering button briefly (around 1/2 second),
or answer with the telephone.
End a call:
Press the answering button briefly (around 1/2 second),
or end the call with the telephone.
Make a call:
When you make a call, the sound is automatically trans-
ferred via the relevant Bluetooth connection (depending
on the telephone's settings) to the DC10.

9
Conference Microphone DC10
One of the Bluetooth connections (telephone, code
0000) has priority. This means that the voice dialling and
re-dialling functions only work in this telephone if two
telephones are connected.
- Voice dialling is activated by briefly pressing (approx.
1/2 second) the answering button.
- Re-dialling is activated by pressing the answering
button approx. 2 seconds.
Microphone position:
During a telephone call, it is possible to select between
the modes Omni – Wide, Omni – Narrow and Zoom,
using the mode selectors on the long side of the unit.
Volume control:
During a telephone call, the volume can be adjusted by
using the menu control on the long side of the unit (this
adjusts the telephone’s volume control). The display
shows the current volume.
When using land line/cordless and mobile phones at the
same time
On some land line/cordless telephones the Bluetooth
connection is not active if no call is being made. This
can cause a time delay before Bluetooth is connected
for an incoming call. In certain cases the time delay can
be avoided by pairing a cordless telephone in the “Pair
Mobile” profile, but this can cause problems with initiat-
ing outgoing calls from the land line/cordless telephone.
For more information, see “More Functions”.
Some mobiles require further adjustments to obtain
sufficiently loud sound. For example increase the level
manually in the media player’s equalizer (SonyEricsson).
Charger unit
The Conference Microphone DC10 is delivered with a
charger unit. Apart from charging the microphone, the
unit can be connected to external sound sources. There
are 2 sockets at the right hand short side of the charger
unit, marked 1 and 2 (look underneath).
At socket 1, an external microphone can be connected.
At socket 2, a stronger signal source, such as TV, MP3,
radio etc. can be connected. It is not possible to use
both sockets at the same time. In that case, an error-
message is shown: Disconnect from Mic/Line. The level
of these signal sources can then be adjusted under
Inputs – Charger unit.
10) Radio range and channels
The transmitter and receiver have built-in antennas.
The radio range between the units is around 100 feet
(30 metres). This may however vary depending on the
particular environment you are in.
Like all radio systems, Comfort Digisystem communi-
cates on specific channels. If you use two transmitters
on the same channel or a neighbouring one, there may
be interference. Other electronic equipment can also
interfere with radio transmissions.
The channel that you use in your country is perhaps not
permitted abroad. Always get in touch with your hearing
aid provider in your country in order to find out which
channels are permitted in different countries.
Comfort Audio is not liable for unauthorized use of radio
waves, such as, but not limited to: interferences with
police communication, or strategic communication,
military installations etc.
11) Trouble shooting
The transmitter and receiver do not start
Charge the transmitter and receiver. Remember to press
the On/Off button down for 2 seconds to switch the unit
on. Check that the charger is connected to the plug
socket.
Poor speech intelligibility
The distance between the transmitter and the receiver
may be too long. The range is around 30 metres. The
distance between the microphone and the person who
is talking may also be too long; move the microphone
nearer to the person talking.
Try to change channel/environment.
Poor range and interference
In some environments involving, e.g., concrete, iron
or sheet metal structures, the range may be reduced.
There may also be equipment nearby causing interfe-
rence. Change channel.
No sound
Check that the transmitter and receiver are set to the
same channel.
Loud hissing noise (no sound transfer)
Check that the units are paired.
The unit will not start during charging
Disconnect the charger. Check the selection Auto power
off under Settings in the menu.

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Conference Microphone DC10
12) Battery maintenance
The rechargeable products in the Digisystem series are
equipped with Li-Pol batteries, ie. the same type of
batteries used for most mobile phones and laptop
computers on the market today. These types of batteries
are able to store large amount of energy in relation to
their weight and volume.
The capacity of Li-Pol batteries diminishes during its life
cycle. The battery type has no "memory effect”, which
would mean that you need fully discharge the battery
before charging to minimize capacity loss. This means
that you can just as well charge the battery often and
little, as opposed to seldom and much. Special charg-
ing circuits in the Digisystem products protect batteries
from overcharging.
The capacity of the Li-Pol batteries deteriorates faster
when they subjected to deep discharge. Therefore, all
products of the Digisystem are fitted with a function that
automatically turns off the product well before deep
discharge occurs. Deep discharge may still happen as
the battery has a certain self-discharge. A product that
is fully or partly charged will with enough time reach
a state when the battery deep discharges, unless the
charger is connected. To avoid this we recommend that
the battery is charged at least every 6 months.
14) Service and warranty
Warranty extension
Comfort Audio Inc. warrants this product sold to the
first end user (buyer) against defects in materials or
workmanship for the time period and as set forth below.
Pursuant to this Limited Warranty, Comfort Audio will,
at its own option, either (a) repair the product or the
parts determined to be defective, using new or refurbis-
hed parts, or (b) provide you with a new, or at our
option, a refurbished unit. The repaired or exchanged
unit is under warranty for the remainder of the original
product’s warranty period. The warranty does not in-
clude any other direct, indirect or consequential damage
or loss, or any third party damages or losses.
This Limited Warranty is for a period of two years from
the date of purchase as indicated by an original receipt
from a Comfort Audio authorized retailer, dispenser or
medical facility. For accessories, the warranty period is
90 days as of the date of delivery.
How to make a warranty claim
For warranty service, you must contact the Comfort
Audio Customer Service listed below to obtain an
RMA (Return Merchandise Authorization) number.
A description of the defect, your name, address and
telephone number is required.
Ship the product freight prepaid via UPS or its equiva-
lent, including a copy of the original purchase receipt,
any cables, earphones and base/charger unit, in its
original packaging or one that offers equal protection.
Insure your shipment for loss or damage. Comfort Audio
accepts no liability in case of damage or loss en route to
our offices.
This Limited Warranty does not cover
Damage from misuse, neglect or normal wear and tear.
Products that have been modified. Products purchased
or serviced outside the territory. If you purchased your
product outside the territory, see your retailer for war-
ranty information.
Product Registration
Please complete, sign and mail the Product Registra-
tion Card packed with your unit. It will make it easier to
contact you if it ever would be necessary.
Comfort Audio Inc.
350 South Northwest Hwy, Ste 300
Park Ridge, IL 60068 USA
To contact the Comfort Audio Customer Service,
call [phone]
or by e-mail [e-mail]
13) Technical data
Type of transmitter: SST – SecureStream
Technology
Range: Approx. 100 feet (30 m)
Dimensions: 4,53 x 2,44 x 0,55 inches
(115 x 62 x 14 mm)
Weight: 3,17 oz (90 g)
Frequency range: 904 - 927 MHz
Antenna: Built-in
Operating time: Up to ten hours
Battery: Chargeable Li-Polymer
Charging time: Approx. five hours
Microphones: Combination of four built-in
microphones, directional and
omnidirectional
Connections: Mic/Line in, socket for
testing with headphones
The weights, dimensions, capacities, performance ratings and other data in
Comfort Audio’s brochures, prospectus, circulars, advertisements, price lists and
instructions sheets are mentioned only as general information. They are only ap-
proximate and shall not bind Comfort Audio.
4002355
Conforms to ANSI/UL Std.60065
Certified to CAN/CSA Std.C22.2 No.60065:03

11
Conference Microphone DC10
Subject to change
15) Important safety instructions -
Read these before using your product
1) Read these instructions.
2) Keep these instructions.
3) Heed all warnings.
4) FolIow all instructions.
5) Do not use this apparatus near water.
6) Clean only with dry cloth.
7) Do not use near any heat sources such as radiators
heat registers stoves, or other apparatus (including
amplifiers) that produce heat.
8) Do not defeat the safety purpose of the polarized or
arounding-type plug. A polarized plug has two blades
with one wider than the other. A grounding type plug has
two blades and a third grounding prong.
The wide blade or the third prong are provided for your
safety. If the provided plug does not fit into your outlet
consult an electrician for replacement of the obsolete
outlet. (Only when using polarized plug)
9) Protect the power cord from being walked on or
pinched particularly at plugs convenience receptacles.
and the point where they exit from the apparatus.
10) Only use attachments/accessories specified by
Comfort Audio AB.
11) Unplug this apparatus during Iightning storms or
when unused for long periods of time.
12) Refer all servicing to qualified service personnel.
Servicing is required when the apparatus has been
damaged in any way such as power-supply cord or
plug is damaged Iiquid has been spilled or objects
have fallen into the apparatus, the apparatus has
been exposed to rain or moisture does not operate
normally or has been dropped.
13) Start listening at a low volume.
14) Too high a volume can seriously damage your
hearing.
15) Don’t disassemble the product.
16) Should the product break open because of damage,
service should only be done by qualified service
personnel.
17) Never use a transmitter or receiver set to a nonper-
mitted frequency. Check with the frequency authority in
the country where the equipment is to be used.
18) The product contains sensitive electronic equipment
and must be handled carefully.
19) Never charge product in closed, unaired spaces
such as handbags, cases or other closed storage bags.
20) Only use batteries and power supply specified by
Comfort Audio AB.
21) You must not change the battery yourself; please
contact your point of purchase.
22) CAUTION! Danger of explosion if battery is incor-
rectly replaced.
23) The product shall not be exposed to excessive heat
such as sunshine, fire or the like.
24) Products include radio transmitters. Do not use
products where it is not allowed to use electronic
equipment, e.g. on airplanes.
25) The necklace should not be used if there is a risk of
getting stuck, e.g. in a machine or other objects.
26) Keep small parts out of reach of children and
animals.Choking hazard if swallowed.
27) Do not leave the product unloaded for too long, the
battery could get damaged.
28) Do not keep the product connected to the charger if
it is not used for a longer period.

Manufactured by:
Comfort Audio AB
Comfort Audio AB, Box154, SE-301 05 Halmstad, Sweden
Tel. [phone] Fax [phone]
Local US office:
Comfort Audio Inc, 350 South Northwest Hwy, Ste 300
Park Ridge, IL 60068 USA
T [phone]
[e-mail] www.comfortaudio.us
MA0361 Ver 1.21 Rev D 120704