DC-20 DigiSystem Conference Microphone
Contents
1. Conference Microphone DC 20 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 three seconds Zoom position Flashes green four times every three seconds When the battery level gets low the indicator flashes red Check the battery status on the display During charging the indicator shows red When the unit is fully charged the green indicator is lit This function is disengaged when the DC 20 is switched on and placed in the Telelink 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 con nected the indicator flashes blue five times During an ongoing telephone call the indicator flashes blue every second second When Reset BT is selected the indicator flashes blue ten times 18 Conference Microphone DC 20 Bluetooth The Conference Microphone DC 20 can be connected to two Bluetooth telephones at the same time During a telephone call the DC 20 is used as2. a hands free that receives the sound and transfers it on to the call partner The sound from the call partner s telephone is sent from the DC 20 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 in coming 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 DC 20 supports both headset and handsfree profiles for Bluetooth The profile is chosen automatically during pairing Application Bluetooth 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 DC 20 Conference Microphone DC 20 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 dialli
3. is also equipped with a built in receiver which allows you to build a system of several cordless microphones from the Digisystem series PSE Perceptual Speech Enhancement The Conference Microphone DC 20 is equipped with high power sound processing that is used in the two omni modes omnidirectional The method is based on empha sising meaningful parts of speech Please visit our web site for more information on how this technology works Conference Microphone DC 20 Functions of the Conference Microphone DC 20 On Off Function indicator Mode selector Pairing button Microphones SQ Menu control volume control for Bluetooth Answering button for Bluetooth OFF button for built in microphones OFF button for built in receiver Charging socket Mic Line in Multifunction socket 4 Conference Microphone DC 20 Functions Charging stand Multifunction socket USB socket Mic in for service Charging Line in socket Conference Microphone DC 20 Functions Telelink Multifunction socket Standby indicator Telephone mode green indicator blue Standby telephone button USB socket for service Mic Line in Charging Telelink socket connection Function selector for Mic Line input Conference Microphone DC 20 Getting Started Charging The Conference Microphone DC 20 is chargeable Charge the DC 20 at least five hours be
4. 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 initiating outgoing calls from the land line cordless telephone For more information see More Functions 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 Conference Microphone DC 20 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 Input Mic Line in This is where the funct
5. note The receiver level on the built in receiver is set to 0 zero on delivery See the Built in receiver sec tion Other functions are explained later in this manual Conference Microphone DC 20 Menu Menu control Three different selections can be made a Scroll up BM Press select g Scroll down To access the menu press the menu control Back Communication gt Channel gt Pairing L gt Bluetooth Sound gt Treble and Bass Equalizer L gt Advanced settings Input L gt Mic Line in gt Charger unit gt Telelink Receiver gain Settings gt Auto power off gt Language gt Key lock gt Name gt Factory reset Activate key lock About 10 Conference Microphone DC 20 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 manu facturer This does not apply to units with both sender and receiver In this case the transmitter receiver are adjusted as described in chapter Radio range and Chan nels To change channel select Channel in the menu Choose transmitter or receiver this applies only to units with both transmitter and receiver Select a new channel using the menu control Channel information is also given when the
6. units with both transmitters and receivers built in can be paired separately When opening the pairing menu choose the concerning unit transmit ter receiver In units with both transmitters and recei vers the pairing button controls the transmitter The transmitter and receiver are paired separately in these units The code key is always the same for the transmitter and the receiver when these are built in in the same unit The easiest way to get the same code key in the whole Digisystem is to generate a new code key from the com bined unit in that way the built in receiver gets the same code as the rest of the system Pairing via menu Select Receive info on one unit Ready to receive pair ing info is shown in the display Select New code on the other unit select Yes 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 To pair another unit into your coded system select Send info instead on one of 12 Conference Microphone DC 20 your paired units 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 One brief press of the button opens the Pairing menu Two brief presses activate the Send info function One long press activates the Receive info function Pairing Connector DT 10 The
7. using polarized plug 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 lightning 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 liquid 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 31 Conference Microphone DC 20 32 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 non permitted 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
8. your point of purchase 22 CAUTION Danger of explosion if battery is incorrectly replaced 23 The product shall not be exposed to excessive heat such as sunshine fire or the like Subject to change Conference Microphone DC 20 Conference Microphone DC 20 33 34 Conference Microphone DC 20 Conference Microphone DC 20 35 4h COMFORT audio Manufactured by Comfort Audio AB Box154 SE 301 05 Halmstad Sweden Tfn 46 0 35 15 23 00 Fax 46 0 35 15 23 23 info comfortaudio com www comfortaudio com
9. SecureStream Technology User Manual Conference Microphone DC 20 English ft comrorraudio User Manual Table of Contents Page Introduction to the Comfort Digisystem 3 Functions of the Conference Microphone DC 20 4 Functions Charging stand 5 Functions Telelink 6 Getting Started 7 First Time Use 8 Menu 10 More Functions 18 Radio Range and Channels 26 Attached Accessories 27 Other original Accessories 27 Trouble Shooting 28 Service and Warranty 30 Technical Data 30 Important Safety Instructions 31 2 Conference Microphone DC 20 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 DC 20 combined transmitter and receiver the signal is transferred digi tally resulting in an excellent interference free sound Comfort Digisystem is fitted with III SecureStream Technology a type of digital technology allowing eavesdrop secure radio transfer in real time Presenting the Conference Microphone DC 20 The Conference Microphone DC 20 is an advanced micro phone offering the option of setting the size and shape of the sound registering area It can be wirelessly connected to two telephones via Bluetooth mobile portable etc as well as to a landline using the original Telelink acces sories The DC 20
10. andby Used to register sound using an exter nal microphone in standby mode C Line in standby Used to listen to another sound source in standby mode e g Dictaphone computer MP3 etc Standby telephone button This button alternates between the Telelink s functions The functions are shown using an indicator for standby mode green and for telephone mode blue In standby mode the sound registering position can be selected us Conference Microphone DC 20 23 ing the program selector on the long side of the DC 20 It is also possible to switch off the microphones using when the DC 20 is in standby mode green indicator The microphones are reactivated automatically when the Telelink is put in telephone mode blue indicator Function indicator The indicator does not display the charging status when the unit is being used This makes it is possible to see which sound registering position is active in standby or telephone mode In other words these can be selected separately for standby and telephone mode Bluetooth telephony works as nor mal when the unit is used with a Telelink but the callin progress always takes priority and must be ended before a new one can be started Volume control for landline telephony During calls using Telelink the volume can be raised or lowered using the menu controls Built in receiver NB The receiver on the Conference Microphone DC 20 is completely switched off on de
11. connector cannot send information only receive it To activate the position Receive info the connector must be in operation position or Il and connected to an operating hearing aid The selector is then quickly moved to position 0 and back to the operating position I or Il The connector can now receive pairing info If no info is received by the connector after a short time this returns automatically to the previous setting Bluetooth Here you can activate Bluetooth to be able to pair the Conference Microphone DC 20 with a telephone or mo bile When Tel Only is selected the transmitter is active only when the telephone call is connected via Bluetooth or Telelink Using Mix level you can adjust the volume of your own voice This function can only be adjusted during an ongo ing telephone call This function can also be used to allow communication with the surrounding environment while making a telephone call Pair Mobile code 1234 is used to pair a mobile with the DC 20 Pair Phone code 0000 is used to pair a cordless DECT or Conference Microphone DC 20 mobile telephone with the DC 20 Select Clear settings to delete all information on paired units Please note After this the Bluetooth units have to be paired again so that Bluetooth can work When using land line cordless and mobile phones at the same time On some land line cordless telephones the Bluetooth connec tion Is not active if no call is being
12. ee 7elelink under More functions In Mic mode you may select the desired preset sound registering mode for landline telephone calls does not apply when an external microphone is used for Telelink When Tele Only is selected the transmitter is active only when the telephone call is connected via Bluetooth or Telelink Receiver level Here the incoming sound level is adjusted via the built in SST receiver See Built in receiver for more information Settings Auto power off This is activated to shut down the unit automatically dur ing charging Language Here you can select the 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 symbols Conference Microphone DC 20 with the menu control Select v to save and x to close without saving To move the cursor during editing use the symbols gt and lt 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 Here you find software information
13. fore 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 col umns the unit is fully charged and switches to automatic float charging A fully charged battery has an operating time of up to eight hours Battery lifetime is up to five years You must not change the battery yourself please contact your point of purchase Connecting a charger to the Conference Microphone DC 20 Please note Only use the charger supplied by Comfort Audio AB Conference Microphone DC 20 First Time Use Switch on the transmitter by pressing the On Off button for around two seconds The Conference Microphone DC 20 always starts in Omni Mode Wide as default The position is easily changed us ing the mode selector on the long side of the unit The various sound reception positions are located in the following order Zoom Omni Narrow Omni Wide default position Music Conference Microphone DC 20 OFF button for built in microphones This button can be used to switch off the built in micro phones An indicator is shown on the display OFF button for built in receiver gt W Used to switch off the built in receiver See the Built in receiver section An indicator is shown on the display Please
14. he person who is talking may also be too long move the microphone nearer to the person talking Try to change channel envi ronment 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 interference 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 Charging in the menu Incorrect channel Please select again or Chan nel interference Please select again is shown on the display See the Built in receiver section Conference Microphone DC 20 Unit functions but considerable background noise is heard Reduce receiver level to 0 zero if no paired transmitter is being used for the built in receiver Conference Microphone DC 20 29 Service and Warranty Comfort Audio AB provides a comprehensive warranty for two years as from the date of delivery This covers all defects of manufacture and materials Defects caused by careless handling or intervention inside the product or its accessories are not covered by the warranty Under normal use battery lifetime is up to five years Contact your point of purchase once it is time to change the battery You are a
15. ion 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 Microphone in and headphones Line level Mic level 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 DC 20 Charging stand Here you can adjust the level for Line in and Microphone in Line in mix can also be selected for use with charging stand It is not possible to use both sockets at the same time In this case an error message is shown Disconnect from Mic Line Telelink If original Telelink accessories have been connected the following functions can be adjusted Tele in level adjusts the incoming telephone sound level for landline telephony can also be adjusted using Conference Microphone DC 20 the menu control when a call is in progress Tele out level adjusts the outgoing sound level for landline telephony This control has no function when an external microphone is used Mic Line in adjusts the level of sound on the Mic Line in input when the unit is in standby mode not telephony green indicator on Telelink The selection of Mic or Line is done using the A B C switch on the underside of the Telelink For more information s
16. livery The receiver level under Connections in the menu is set to 0 zero The receiver must be adjusted to a suitable level in order to hear what is being said The Conference Microphone DC 20 is equipped with a built in SST receiver This can receive in the frequency range specified in the Radio range and channels sec tion If an attempt is made to select a different channel through pairing the error message Incorrect channel Please select again is shown The receiver is paired in the same way as other Digisys tem units See the Parring section The sound received can be adjusted to precisely the right 24 Conference Microphone DC 20 level under Connections Receiver level The OFF switch for built in receiver button on the long side of the unit enables you to switch the built in receiver on and off This allows to select the sound source in spe cial listening situations It is not possible to select a receiver or transmitter fre quency with an exact difference of 26 MHz between them If an attempt is made to input this setting the message Channel interference Please choose another channel is shown on the display Select a different receiver fre quency If an attempt is made to send channel informa tion which causes this situation to the unit s receiver or transmitter the message Channel interference Please choose another channel is shown on the display As the built in receiver is not being used the
17. lways welcome to contact us at Comfort Audio if you have any questions Technical Data Type of transmitter receiver SST SecureStream Technology Range Approx 30 m Dimensions 115x62x14 mm Weight 90g Frequency range Transmitter 852 872 MHz Receiver DG01101 824 849 MHz Antennas Built in Operating time Up to eight hours Battery Chargeable Li Polymer Charging time Approx five hours Microphones Combination of four built in micro phones directional and omnidirec tional Connections Mic Line in socket for testing with headphones socket for charging stand and Telelink Oc Z Conference Microphone DC 20 Important Safety Instructions Read these before using your product 1 2 3 4 5 6 7 8 9 Read these instructions Keep these instructions Heed all warnings Follow all instructions Do not use this apparatus near water Clean only with dry cloth Do not use near any heat sources such as radiators heat registers stoves or other apparatus including amplifiers that produce heat Do not defeat the safety purpose of the polarized or grounding 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
18. ng is activated by briefly pressing approx 1 2 second the answering button Re dialling is activated by pressing the answering but ton approx two 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 Pairing with telephones To pair the unit with telephones see the section Communication 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 Some mobiles require further adjustments to obtain sufficiently loud sound For example increase the level manually in the media players equalizer SonyEricsson Charging stand The Conference Microphone DC 20 is delivered with a charging stand Apart from charging the microphone the stand can be connected to external sound sources There are 2 sockets at the right hand short side of the charging stand 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 Conference Microphone DC 20 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 Connec
19. receiver level should be set to 0 zero in the Connections menu or switched off using 8 This is to prevent undesirable interference which may be caused by other electronic equipment Channel planning for optimal radio performance When both the transmitter and receiver are being used on the DC 20 the frequency difference between the trans mitted and received frequency should be at least 15 MHz for optimal function The frequency difference between the transmitted and received frequency must not be 26 0 MHz exactly The DC 20 blocks the option to set the frequencies in this way If several transmitting frequencies are being used in the same room the frequency differences between the units should be at least 1 MHz for optimal function Conference Microphone DC 20 26 Radio Range and Channels The transmitter and receiver have built in antennas The radio range between the units is around 30 metres This may however vary depending on the particular environ ment you are in Like all radio systems Comfort Digisys tem communicates 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 Transmitter In most European countries channels 1 3 863 250 864 750 MHz may be used for hearing products How ever you should always check with the frequency assign ment authority in your own count
20. refore the 1 2 3 switch on one of the long sides of the switch box must be in the correct position You will need to test this by listening Activate your Digisystem units DC 20 and receiver so you can hear the background noise when the Telelink is in standby mode Use the Conference Microphone DC 20 Standby Telephone button so the green standby indicator is lit Then press the standby telephone button so that the Telelink is in telephone mode blue indicator Lift the handset and check whether you can hear the dialling tone If not use the 1 2 3 switch to find the correct setting If the sound level is too low or too high go to the Conference Microphone DC 20 menu under Connections Telelink and increase or decrease Tele in level accordingly Make a call to ensure the recipient can hear you If not adjust the 1 2 3 switch and Tele out level under Connec tions Telelink until your voice can be clearly heard This is done while the call is in progress When an external microphone is being used with the Telelink activated by selecting position A on the under side of the Telelink the Tele out Level does not affect the sound Instead position the external microphone for optimal sound registration The A B C switch on the underside of the Telelink is used to select the function on the Mic Line input marked no 1 A Mic out when telephoning Used when using the ex ternal microphone in telephone mode B Mic in st
21. ry which channels are free and which require a licence In addition to channels 1 3 under Extended there are several channels in bands A F which require a licence in most European countries B 854 863 MHz E 852 854 MHz F 865 872 MHz Receiver The built in receiver can be used with the following channels E 824 849 MHz Model nr DGO1101 Conference Microphone DC 20 Attached Accessories Necklace Two different lenghts Clip on microphone Charger Charging stand Split cable for charging Audio cables Other original Accessories Car charger The car charger is designed for cars with a 12 volt earthed electrical system The charger has short circuit and automatic overload protection Disconnect the char ger from the socket after use Boom microphone Headset microphone Earworn microphone A microphone that is attached around the ear Telelink Accessories for landline telephony For other accessories please visit our website www comfortaudio com 27 Conference Microphone DC 20 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 t
22. tion Charging stand Telelink Telelink is an original accessory from Comfort Audio which is suitable for the Conference Microphone DC 20 This original accessory is used to enable the connection of landline telephone calls via a cable to the Conference Microphone DC 20 Telelink is connected via a switchbox to a stationary telephone To allow this the contact on the handset cable must be of the modular type y Installation see also Telelink Quickstart Start by disconnecting the handset cable from the telephone Then connect the modular cable provided between the telephone and switch box in the socket marked see underside of switchbox Connect the handset to the socket marked gt see underside of switch box lt gt Be Connect the remaining cable modular 3 5mm contact 21 Conference Microphone DC 20 between the socket marked see underside of switch box and socket no 2 on the Telelink see underside of Telelink Place the Comfort Conference DC 20 into the Telelink Connect the charger to the Telelink F8 w i lt lt p Your telephone can still be used exactly as before when the switch on the switch box is set to position To use the Telelink for telephone calls the switch should instead be set to position An external microphone can be connected to the socket marked 1 on the underside of the Telelink Different telephones are connected in different ways The
23. units are paired Channels 1 2 and 3 are free channels in most European countries that do not require a licence Under Extended more channels can be selected but these usu ally require a licence see the section Radio Range and Channels FFC Free Frequency Check indicates in green the suit able frequencies for the specific environment Please note Switch off your other Digisystem transmitters for correct result FFC dB indicates the noise level in dB for each channel The higher the value the lower the risk of interference When selecting a channel for units with a built in trans mitter and receiver see the Built in receiver section Pairing To use a receiver and transmitter together they must be Conference Microphone DC 20 11 paired All transmitters and receivers are default paired at the factory and will work together To prevent eaves dropping a new code key must be generated and trans mitted between the units by pairing If the following error message shows Illegal channel Please choose another channel please see the Built in receiver section 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 sec tions Pairing via pairing button and Pairing Connector DT 10 for more information Pairing information or a new code key can be received by several activated units Comfort Digisystem
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