Central Unit Manual.vp - Close Talk Conference System
Contents
1. 35 Chairman Right Key 36 System ei ee Se bed Se eh Ge See a 36 Serial NUMber saros tad eet ee RAS in kime 36 Security Code 37 Backlight ass kr kg SE we BEE a pe pa ae a 37 Firmware version 38 Lock UNI ea ss se eee i 38 Section 6 System description 39 Overview 41 Central Unit 42 Delegate Unit 43 Audio system 44 Section 7 Specifications lt ae cc 6d rada d ban 47 Transmission 49 Audio 2 sak dau ane ETE RES ea ne eS 4 49 All UNIS sa aars o SR EA REE pas Rate Ra n Ek 49 Wall table and early rack mounted models 49 Rack and table top units 50 General x sa he a das sen de 50 TE 2 eee de Se gas ee hs ee 50 Wall table and early rack mounted models 50 Close Talk Central Unit Table Of Contents Rev 1 08 Rev 1 08 Rack and table top models 50 Physical s dada k e oa sake es 50 Wall table and early rack mounted models 50 Rack and table top models 51 Environment 51 Null modem cable 52 25 piw serial POM 2 4 fag ew se ae Fa ME we Ae d cd dg Ee2. s e s sa eee d de gaie a a he 10 K KMOD is i Sos is aaa Baa aide Alem eee Se 2 8 15 30 31 43 L levelsa var ee Se sy cai ay hn erst E mol ys 16 Einem aa sree DR as Se Wey ec Se ae ek does Sen die aie 10 22 29 45 LINE e a sfe sinin mia bob eee Gs ar kee oe eee ee 10 22 29 45 Eine gt Nel6 DU 52 sa kur bodes eG 2s aod h ROR A a o o 22 29 listen Only sacra ee a eR we 31 1010 sl 5a ai ee a k ae A Ok we a eel a a amp He 24 Lock Units us eta bee Les ee da ILE asset 21 24 37 38 106 La ER sax cates dns E 33 M MAXIMUM see get GE Sr ee a eee A 31 Menu seh ee ab See e A eee cat A a S T HS a a 15 MIGFOPNONE 22 ee GE ee ee Ee ee de 27 28 32 43 45 Microphone Compensation 22 30 minimum ev 25 age Se Gi US Ge Bae whem ke er ker see JG te 31 Close Talk Central Unit Rev 1 08 Rev 1 08 N Navigating so a 0 ee Pee be RRP SSeS a 15 MulleMOdeM s 22 Alah oa k 5 ae a as Da a aaa 34 Number of Speakers 23 35 O OVETNIEWE s ts dal e ade aa e SAGE no bo 41 Own Channel 35 P PG saksa aa de ale sa ak eue Rab A b 34 Pl tfomm se A o bod Ga Re nel ar GE Sk eee aat og DEG ae oe ag 33 POWERS oot Gastar aa faye Date ST Te Se eee AG 8 Power connector 2 sos 4 aa Go ROM GE G ar r ue 402 10 power ja fuss ere set ds ac set kle fe se 23 31 powet SUPplY ss s 408 bek Sk PEEK ee K
3. Important Do not forget the code unlocking a locked unit requires special tools Factory setting is 0000 i e no protection Backlight Figure 5 20 Display backlight time The Central Unit has a backlit LCD display If a button is pressed or the knob is turned the backlight is turned on for the duration in this setting The time can be set from 0 to 59 seconds or On where 0 means that the backlight is always off and On means always on Factory setting is On Settings and functions 37 Firmware version Figure 5 23 Central Unit firmware version Informative only Shows the Central Unit firmware version Check with www closetalk se regularly to see if there is a newer version available New versions will often improve performance of the system The Central Unit firmware is updated with the Microsoft Windows compati ble Close Talk Loader software utility which can be downloaded free of charge from www closetalk se A software loader adapter may also be needed to connect the PC to the Central Unit Contact your dealer for advice Lock Unit 38 Figure 5 22 Lock Central Unit If a valid security code has been specified in the Security Code setting the Central Unit can be locked to prevent unauthorized changes to the settings Press SELECT followed by ENTER The unit is now locked Pressing any but ton or turning the knob will prompt for the code After entering the correct code press ENTER and the unit is
4. Line gt Tele Out Level control for the Line In to Tele Out cross coupling Line Out Level control for the Line Out rear panel connector Microphone Compensation Feedback compensation setting Close Talk Central Unit Section 4 Rev 1 08 Rev 1 08 Delegate Units menu layer Figure 4 3 shows the Delegate Units menu layer Delegate Units Speak Vol Del Off Chair Unit 1 amp 2 Start Update Num of Sp Headp Vol Del Silent Prio Unit Chairman chair R Key Figure 4 3 Delegate Units menu layer The Delegate Units menu layer contains settings closely related to the func tionality and use of the Delegate Units The following entries are available Speaker Volume Settings for the minimum and maximum speaker sound level for the Delegate Unit Headphones Volume Settings for the minimum and maximum headphones sound level for the Delegate Unit Delegate Off Setting that specifies the Delegate Unit power off time Delegate Silent Setting that specifies the loose audio channel timeout Chairman Unit 1 and 2 Setting that specifies which Delegate Unit to treat as the chairman unit with backup capability Priority Unit Setting that specifies which Delegate Unit to treat as the priority unit Start Update Function for Delegate Unit firmware updates Chairman Setting that selects the Chairman Audio Channel Guarantee method Number of Speaker
5. In the event that a longer cable length is needed or if the installation requires it a custom built cable can be used and should be connected according to the drawings in figure 7 1 and 7 2 Only use high quality foil shielded cables recommended for data communication Use high quality connectors with preferably shielded connector housings Do not exceed the RS 232 specification of a maximum of 15 meters 45 feet cable length 52 Close Talk Central Unit Section 7 Rev 1 08 Rev 1 08 AUX port The AUX port is a one in one out optocoupler isolated control port It s main use is together with a telephone hybrid where the hybrid can select one of the two Central Unit audio settings via the AUX input and the AUX output controls the answer hangup state of the hybrid AUX port pins 1 Input Anode with 390 ohm in series 2 5 VDC 20 ohm in series 3 NC 4 NC 5 Output collector 6 Input Cathode 7 Ground 8 NC 9 Output emitter Maximum output voltage 24VDC current 20mADC Maximum input volt age 24VDC Output and input is overvoltage and reverse polarity protected with low impedance diode Specifications 53 Audio channel status command protocol 54 Introduction The serial port on the central unit is normally used for remote control of the entire system The full control protocol command syntax and command set is quite large and is not described here A simple command for reading the curre
6. flat re sponse EQ High Figure 5 2 Equalizer high register setting Specifies boost or cut in the high frequency region of the delegate micro phone audio signal Maximum value is 12 and minimum value is 12 Factory setting is 0 flat re sponse Global Audio 27 Delegate Volume Figure 5 3 Delegate audio volume Controls the level of the delegate microphone audio signal Two levels can be specified The currently active level is selected via the AUX port see page 53 The setting shown without parantheses is the currently active level Max imum value is 40 and minimum value is 0 Factory setting is 34 for legacy units and 38 for generation two or later serial numbers 2000 and higher NOTE This setting should normally be left at the default setting To adjust the dele gate unit speaker level use the Speaker Volume setting described on page 30 If the microphone signal needs to be processed externally before sending it back to the delegate units set this setting to Off in that way only signals ap pearing on the Tele and Line In ports will be sent to the Delegate Unit speak ers Tele In 28 Figure 5 4 Tele In input level Controls the level of the rear panel Tele In input Two levels can be specified The currently active level is selected via the AUX port see page 53 The set ting shown without parantheses is the currently active level Level 35 sets the input to unity gain maximum value is
7. 3dB gt 60dB 1kHz lt 1 1kHz 500mVrmsnominal 1kHz with Line In setting set to 36 500mVrmsnominal 1kHz with Tele In setting set to 35 500mVrms nominal 1kHz with Line Out setting set to 36 500mVrms nominal O 1kHz Line and Tele In is peak level controlled by a limiter on units with serial number 2000 and higher Wall table and early rack mounted models Line In impedance Tele In impedance Line Out impedance Tele Out impedance 20kOhm 1kHz 20kOhm 1kHz 1kOhm 1kHz 1kOhm 1kHz Transmission 49 Rack and table top units Unbal Line In impedance 10kOhm 1kHz Bal Line In impedance 12kOhm 1kHz Unbal Tele In impedance 10kOhm 1kHz Bal Tele In impedance 12kOhm 1kHz Unbal Line Out impedance 1000hm 1kHz Bal Line Out impedance 500hm amp 1kHz Unbal Tele Out impedance 1000hm 1kHz Bal Tele Out impedance 500hm amp 1kHz Insert Out level 500mVrws nominal 1kHz Insert In level 500m Vrms nominal 1kHz Insert Out impedance 1000hm Out tip 1kHz Insert In impedance 12kOhm In ring 1kHz General Serial port RS 232C 9 pin male D Sub DTE device AUX Port Optional 9 pin female D Sub see AUX port section Display 16 characters x 2 lines backlit LCD Firmware update Via serial port Security Panel can be locked by PIN code Power Wall table and early rack mounted models Power consumption 4 3W transceivers powered by the CU Power requirements Use only C
8. dra ee ke ba k 34 38 CONHOIS Lua ak rader es eee ne E 15 16 CTOSS COUPIINQ S xs kassa ke a Ge FG Ga Ga Ga alk s 29 45 QUE kk nie bd GE GE EG A ee owe 27 D Geadlocks x vas vare ske FE GSE ANE EE ME as ark a 4 0 32 Delegate Off bah ia PE LS ae we we kok ee FE Ace SE A 23 31 Delegate Silent 23 32 Delegate Unit 24 54 4 es sr o e O 43 Delegate Units 4 v s Gun io hu Ek d 4 21 23 30 Delegate Volume 22 28 METEGION go 4 ek ag em BRE se ae v De re Boe Grae arte 32 disabled 3 iia arr se es a ae E ace da GA 31 Display EE a ee ae ee we 8 E EDIT ed GE EE kB EE See ve Ree SG od 8 17 ENTER 52 5e AS 5 2 SE LM ea Bete da 8 15 16 17 EO FUGM ua sv Ge vee ote eens fey He arene oe a ate Geen 22 27 EQ EE am ae gh BO mdr BS he che murs d 22 27 ERROR y ss i u s Et ai s SE AO AN ed ae ene oe APG 8 F Feedback i stis ahs Gia RS EG RA SE aA Re GE 22 30 firmware ax sag do he Ke ra Re as ew es 33 Firmware version o ec s ee Din ee a AGE a Ke A 24 38 Front panel 4 sa suser sa sa GERE SE KE ME 6 EE 7 G Global Audio 21 22 27 H headphones s 404 4 dk sk dad Le sa mm kle me ae a 23 45 Headphones Volume 23 31 l Dr eder AI IN fn ae ie os 32 33 INGIGATOMS ua GT te Ka ee we ke fe a le me Mae 8 Instrument label gt
9. such as small rooms with a lot of hard surfaces like walls ceilings and windows which may reduce the system feedback margin The Microphone Compensation setting increases the feedback margin by re ducing the delegate speaker sound levels depending on the number of active delegate unit microphones The sound level is controlled by varying the Dele gate Volume setting Reduction can be specified for two left setting and three right setting ac tive microphones Factory setting is 0 no reduction and maximum reduction is 16 The Level Compensation setting should only be turned on when needed and will require some experimentation for a proper result Delegate Units Speaker Volume 30 Figure 5 8 Speaker Volume Delegate Unit s are equipped with a volume knob that may be used to adjust the delegates speaker and headphones levels The Speaker Volume setting specifies the range of this volume knob for the speaker by a minimum and maximum level Close Talk Central Unit Section 5 Rev 1 08 Rev 1 08 The range for the minimum and maximum value is 0 to 31 Factory setting is 26 for minimum and 26 for maximum The delegate unit sound level can be fixed by setting both levels to the same number effectively disabling the Del egate Unit volume knob This is usually desired to prevent the end user from changing the system sound level tuning Headphones Volume Figure 5 11 Headphones Volume Delegate Unit s are equi
10. 3 1 CS where Ax y is the channel and byte number e g A1 3 means audio channel one byte 3 bits 16 23 Recreate the 24 bit ID number as ID Ax 3 65536 Ax 2 256 Ax 1 Inactive audio channels will show ID as 0 Poll the central unit once per sec ond or slower The following is an example of a reception with no active audio channels all ID s 0 1 16 0 0 0 82 0 0 0 0 0 0 0 0 0 156 The following is an example of a reception with audio channel one used by a delegate unit with ID number 1716 1 16 0 0 0 82 0 6 180 0 0 0 0 0 0 226 0 65536 6 256 180 1716 Audio channels 2 and 3 unused ID 0 Checksum updated accordingly Specifications 55 56 Blank page Close Talk Central Unit Section 7 Rev 1 08 Rev 1 08 A About vg eed ke SR OE ee ee i eee ee SS 3 4 Audio system s e s OR a ee ea b 44 B Backlight z 5 4 s 4 for d be ska She ka EE Rave G 24 37 battery p s sak se ua ete GE GT ee Daa awe 31 32 BOOSIE LA EE Se rj v LL oak Dhs 27 Bortow Channels ol ses se Sok SETE k gt 35 BUNOS 25 G Ta AG Ge MAE Blech o defaut ae 8 C Central Unit 02246 ss oe oe dk Ee ah A Pe hile a KER 4 Chaimanta recs se Od coe ome etd en Fen DR 3 23 32 34 Chairman Right Key 23 36 Chairman Unit 23 32 34 Channel Guarantee 23 Close Talk L d r 4 4 ae
11. 39 and minimum value is 0 Factory setting is 0 input off Close Talk Central Unit Section 5 Rev 1 08 Rev 1 08 Line In Figure 5 7 Line In input level Controls the level of the rear panel Line In input Two levels can be specified The currently active level is selected via the AUX port see page 53 The set ting shown without parantheses is the currently active level Level 36 sets the input to unity gain maximum value is 39 and minimum value is 0 Factory setting is 0 input off Line gt Tele Out Figure 5 6 Line In to Tele Out cross coupling Controls the level of the rear panel Line In to Tele Out cross coupling Two levels can be specified The currently active level is selected via the AUX port see page 53 The setting shown without parantheses is the currently active level Maximum value is 39 and minimum value is 0 Factory setting is 0 cross coupling off Line Out Figure 5 5 Line Out level control Controls the level of the rear panel Line In to Line Out cross coupling Two levels can be specified The currently active level is selected via the AUX port Settings and functions 29 see page 53 The setting shown without parantheses is the currently active level Maximum value is 39 and minimum value is 0 Factory setting is 36 Microphone Compensation Figure 5 9 Microphone Compensation Microphone Compensation is a setting used to compensate for feedback in problem environments
12. G 10 PHON 4 F vase KG Gale GERA BEA Ge ee 23 33 Priority Unit a v s sk GE Gi ro FE dere AE ete 23 33 PIivileges sus sus ss s Ear Re elg a v AE pk REE Fn Ets 32 33 Q QUEUS ett NG TE EA SE BEE Et 3 32 R FANG GE kast Mania Gre atch ske MATET Bak Ga duk 31 ROAR Panel EEE Er 9 S SOCUMLY opos ak aad E D bah a eet bee Bw GE 37 38 Security Code 24 37 SELECT nerd TEA a 8 15 16 17 Serial Number bAi 2444 4 44 du 8 GE 8 a ar nu 24 36 Serial Port hea AE ak MB Due a da dE pee v 10 simultaneous speakers 35 Speaker 2 Se be ee hee Be A PA he ee Gn 23 45 Speaker Volume p ia w 6 V aa eee A 23 30 Start Update ee 23 33 Steal Channel 1 24004 4 4 4 2 BERR ETG es 35 SUPPONE aaa aria 424 A A EE gE bee ot 3 SE 21 24 36 iv MOI UM ar Ga SE EEE eGo R E SG Re 10 22 28 45 TeleQut vs sat da he Seko Rade Sa SEKSE Giel due eS 10 45 Top levels s suse gun sk BU EUR AG LE ARE ke EE Ea 21 Transceiver Units s ai 2 se see l EE SE SE Ke GE 4 U A Ne eu val va dar 33 34 W Welcome ss rask ea SRG i ame ee LL es aa b 3 V Version Sawa A him bete n FETE GAGA ets 34 Close Talk Central Unit Rev 1 08
13. Out via level control Line gt Tele Out page 29 This built in cross coupling feature makes it possible to use a telephone hybrid together with a tape recorder directly without external mixers or patch bays The level of Line Out can be controlled by the Line Out page 29 setting The DU speaker and headphones volume levels can be controlled via the Speaker Volume page 30 and Headphones Volume page 31 settings mak ing the audio system completely controllable from the CU The microphone level in the DU is fixed The internal audio limiter is only available on units with serial number 2000 and higher System description 45 46 Blank page Close Talk Central Unit Section 6 Rev 1 08 Rev 1 08 Section 7 Specifications Specifications 47 48 Blank page Close Talk Central Unit Section 7 Rev 1 08 Rev 1 08 All specifications subject to change without prior notice Specified at 20 degrees centigrade with a 15 minutes system warm up time Transmission Media Wavelength Carrier Frequency Data Audio All units Frequency response Dynamic range THD Line In level Tele In level Line Out level Tele Out level Infra red 875nm FM modulation Audio transmitted 2 92MHz Data transmitted 3 61MHz Audio 1 received 4 84MHz Audio 2 received 2 38MHz Audio 3 received 4 36MHz Data received 5 61MHz obsolete 5 32MHz Nov 2004 Bit phase modulation 250Hz 6kHz
14. Rev 1 08 Close Talk Central Unit User Manual Revision 1 08 Copyright 1999 2008 Close Talk Marketing AB Author Goran Ekstr m All specifications subject to change without prior notice Revision History Rev 1 00 First public release Applies to Central Unit program version 2 01 or later Rev 1 01 Minor corrections Rev 1 02 Minor corrections Rev 1 03 Minor corrections Rev 1 04 Minor corrections Rev 1 05 Added description of Microphone Compensation parameter Telephone Hy brid support and other minor corrections Rev 1 06 Added description of rack mounted and table top Central Unit models Rev 1 07 Minor corrections Rev 1 08 Updated for new box design and firmware version 2 13 and later Rev 1 08 Rev 1 08 Table Of Contents Section 1 Introduction ss eee ees 1 Welcome s gt s 3 si sm da sales ka Ga mares 3 About this manual 3 Support 225 es be ee se eee ey ee we 3 About Close Talk Marketing 3 System description 4 Section 2 Exterior a ca a a ac a Gone 5 Front panel kaa scsi a RA F4 Rear panel i se hog aaa atar BA af E AD a a doa we ode 9 Section 3 Using the front panel 13 Navigating the menu tree 15 Control dh a kee M er ee uk akk ad a Rue 15 Menustrudture 224 4228 2 eka dur Oe a het b 15 M
15. Unit s firmware Turn on all Delegate Unit s to be updated Press SELECT and choose either Offer Update or Force Update Offer Update will only update Delegate Units with lower firmware versions than the current Force Update will update all Delegate Unit s regardless of the current version number Force update is normally only used if it is required to install an older firmware version over a newer one Press ENTER The update starts with a percentage completed counter in the display The Delegate Units will flash the vote result LED s slower during the update After the update function has reached 100 the Delegate Unit s will automatically turn them self off if the update was successful Delegate Unit s that failed to update will remain powered on possibly with the LED s flashing Verify that the failed units has a clear infra red communication path If required move them closer to a transceiver unit and try again The Delegate Unit firmware copy in the Central Unit is updated with the Microsoft Windows compatible Close Talk Loader software utility which can be downloaded free of charge from www closetalk se A null modem cable is required to connect the PC to the Central Unit A connection diagram for a null modem cable can be found on page 52 Chairman 34 Figure 5 16 Chairman One Delegate Unit can have special privileges as described for the Chairman Unit setting The chairman unit is always guaranteed an audi
16. age Close Talk Central Unit Section 2 Rev 1 08 Rev 1 08 Section 3 Using the front panel Using the front panel 13 14 Blank page Close Talk Central Unit Section 3 Rev 1 08 Rev 1 08 Navigating the menu tree The following part uses the legacy wall table unit for illustrations but the procedure applies to all Central Unit types Figure 3 1 shows the Central Unit front panel SELECT ENTER I POWER EDIT ERROR 4 Figure 3 1 Central Unit front panel The display as it shows after power on Controls There are three controls used to access the Central Unit settings the SELECT button the ENTER button and the rotary encoder knob Menu structure The menu structure is built as shown in figure 3 2 gt Menu 1 Menu2 Menu3 gt Menu 4 gt Submenu 1 Submenu 2 gt Submenu 3 Ll vValue Figure 3 2 Menu tree design The structure is in a layered circular fashion Use the rotary knob to move horizontally Turn clockwise to move to the right and counter clockwise to move to the left Use the SELECT and ENTER keys to move vertically 15 Menu level indicator Top right in the display is a menu level indicator as shown in figure 3 3 SELECT ENTER POWER EDIT ERROR f Figure 3 3 Menu with submenu available The following indicators are used el The menu item has sub menus e The bottom of the menu layer has been reached The menu
17. bander Tele out Speaker Delegate oi headphone Oy Receiver pad Le Line Out Mixer Bal Unbal Volume Line Out and F Equalizer Balan Y Tele In Tele In ll Mier Mi PE Unbal ixer Audio out Limiter Le Tele In Compressor Balan g 1 Line ln fre Line In Volume Unbal stemt Line To Tele 44 Line In Volume LU 3 Insert Figure 6 5 Rack and table model audio path block diagram Applies to 19 inch rack and table top units shown on page 7 and 9 44 Close Talk Central Unit Section 6 Rev 1 08 Rev 1 08 The DU microphone signal is sent on 3 channels to the CU where it is ex panded and mixed into a single channel main audio path The main audio is sent straight to the Line Out and Tele Out connectors The Line Out connector has a level control The main audio passes through a level control Delegate Volume page 28 and equalizer EQ Low page 27 and EQ High page 27 The Line In and Tele In connectors are mixed into the main audio signal via two level controls Tele In page 28 and Line In page 29 For units with bal anced and unbalanced connectors the signals are mixed before the level con trols The main audio is then mixed with incoming Tele and Line signals limited compressed and transmitted to the DU s A cross coupling function is available where the Tele In signal is mixed into the Line Output after the level control The Line In signal can be cross cou pled to Tele
18. de 52 9 pin serial port oa s 208 eR a EE REE FA EEG 52 AUX POM 2 sed seas ae ee eee Bae s g 53 Audio channel status command protocol 54 Introduction 44 6 ie hekket be de G ee b nd Ge lt o 54 Port settings sasore popa kaka O ea 0 de 4e 54 Protocol 1555 ns Mmes mener mme ete 54 iv Blank page Close Talk Central Unit Table Of Contents Rev 1 08 Rev 1 08 Section 1 Introduction Introduction Blank page Close Talk Central Unit Section 1 Rev 1 08 Rev 1 08 Welcome Thank you for purchasing the Close Talk Conference System The design phi losophy was to make a revolutionary product in both design and productiv ity providing a powerful conference tool We hope it will provide a long time of good use About this manual The manual is divided into several sections each focusing on a specific topic Introduction This section e Exterior A brief description of the unit exterior Using the front panel Tutorial for using the front panel Menu structure An overview of the menu structure Settings and functions Detailed description of the unit settings System description Conference system and system component s functional description Specifications Central Unit specifications Support Sales questions and support issues should be directed to your local dealer If you have a specific problem please check at www closetalk se for soft and firmware update
19. e with filters in Audio IR transmitter FM modulator a4 Compressor lt Data IR transmitter FM modulator Computer Le Knob buttons and display Serial port Figure 6 2 Central Unit block diagram Close Talk Central Unit Section 6 Rev 1 08 Rev 1 08 Delegate Unit Figure 6 3 shows a block diagram of the Delegate Unit DU The infra red HF signal is received and band pass filtered by the built in IR receiver The re sulting signal is sent to the two FM receivers global audio and data where it is demodulated The demodulated audio signal is expanded and band pass filtered before it is sent to the speaker headphones amplifier The amplifier level is controlled by the computer that receives levels and volume knob span information from the CU via the data channel The data channel is filtered and the data pulse train is extracted The pulse train is sent to the computer for reconstruction into the system byte stream data protocol The outgoing system byte stream data protocol is converted by the computer to a pulse train suitable for transmission The microphone signal is band pass filtered and compressed before trans mission The computer also manages the buttons LED indicators and volume knob Expander S Speaker Bandpass filter de e IR receiver Speaker amplifier Microphone amplifier Microphone O Bandpass filt
20. e 2 3 shows the table top Central Unit front panel Display Indicators Rotary knob TT Buttons Power switch Figure 2 3 Table top Central Unit front panel Figure 2 4 a generation three 19 inch rack mounted Central Unit front panel Display Indicators Rotary knob Buttons Power switch Figure 2 4 19 inch rack mounted Central Unit front panel The main front panel components are Display 16 characters x 2 lines backlit LCD display This is where all settings in the Central Unit is shown Indicators Contains three LED indicators that shows the state of the Central Unit where POWER Power is applied EDIT The current setting is in edit mode ERROR The unit is in an error state Buttons The SELECT and ENTER buttons are used to navigate the menu structure and to change settings Rotary knob Used to navigate the menu structure and to change settings Power button Turns the system on or off The power of system components such as Split Boxes and Transceivers will also be controlled by this swicth 8 Close Talk Central Unit Section 2 Rev 1 08 Rev 1 08 Rear panel Figure 2 6 shows the legacy wall table top Central Unit rear panel Instrument label Power connector Tele amp Line input s TEI NE RS 28 LV DC IN Central anit C sx ps 3 oul cu OGGE Case Talk AB a Serial port Tele amp Line output s Figure 2 6 Wall table Central Unit rear panel Figure 2 7 a gen
21. eatures available via the right key on the chairman delegate unit If this setting is set to Enabled then depending on the Chairman setting the chairman unit right key functions as follows With Chairman set to Steal or Own By pressing the right key all currently active delegate units will loose their audio channel permanently and the chairman is given a channel exclusively The speaker list is blocked until the chairman presses the right key again With Chairman set to Borrow By pressing the right key all currently active delegate units will loose their audio channel temporarily and the chairman is given a channel exclusively The speaker list is blocked until the chairman presses the right key again Factory default is Enabled A chairman can go directly from normal discus sion using the left microphone request key to microphone override using the right key simply press the desired key at any time System Serial Number Figure 5 19 Central Unit serial number Informative only Shows the Central Unit s serial number 36 Close Talk Central Unit Section 5 Rev 1 08 Rev 1 08 Security Code Figure 5 21 Central Unit serial number The Central Unit settings can be protected with a four digit security code En ter a code other than 0000 to enable the security system Enter 0000 to disable it After entering a valid code use the Lock Unit function to prevent unautho rized changes to the Central Unit settings
22. enu level indicator 16 Using the controlS k 4 4 or 4 4 4 44 A A SE 16 Section 4 Menu structure 19 Top level menu c 4 Sau wae sama Tak maa ak de mi ei 21 Global Audio menu layer 22 Delegate Units menu layer 23 System menu layer 24 Lock Unit function 2 sao sak ae vag wa A Mu 24 Section 5 Settings and functions 25 Global Audio 27 EO LOW sa sti GR SES ve er Danois 27 EQ Highs ie s oa a a as a EE a is 27 Delegate Volume 44 ss ua 4 4 na sas du sc ss 28 Telen vass PR Date 2 I a we Sapte ou Dares 28 Line ns s sh saa s sot s one BEE AG au ot a 29 Line gt Tele Out 29 Kine Otis lt sp 48 he ae S r rd reg Se SM ar eid 4 29 Microphone Compensation 30 Delegate Units 30 Speaker Volume 30 Headphones Volume 31 Delegate Offi s s sacs pip mara mue HR huh Ga s 31 Delegate Silent 32 Chairman Unit Wand 2 44 mossi age sr dad men e an d a i 32 Priority Unit nn at ee po tec DA adi SUSAR dd dm ae ee 33 Start Update saa vr du du d a SEE mi Re A En 33 ChaltMan s o eae eee DEE G SE FERGE Gr de Ee ae 34 Number of Speakers
23. er FM modulator H IR transmitter Compressor m Data signal filter a FM receiver and comparator Data Computer Volume knob buttons and indicators Figure 6 3 Delegate Unit block diagram System description 43 Audio system Figure 6 4 shows the system audio path for the legacy wall table unit Audio in 1 Balsa Mixer noise y i legale Audio in 3 gt gate and gt Mixer gt Tele Out Mieraphone H Transmitter ander Speaker Delegate io i J Audio in 2 Delegate F headphone OO Receiver Volume Sie Mixer Line Out and F Equalizer x Mixer Audlo out Compressor Ni l Tele In Tele In Volume Line In 3 Volume Linah Line To Tele fl Volume Figure 6 4 Legacy wall table model audio path block diagram This diagram also applies to early versions of the 19 inch rack mounted unit recognized by the use of Phono audio connectors on the rear panel Figure 6 5 shows the system audio path for the rack and table top unit Audio in 1 Mixer noise y i Delegate Audio in 3 gt ate and gt Mixer BalrUnbel Misrophong O Transmitter
24. eration two 19 inch rack mounted Central Unit rear panel AUX port Serial port System fuse Insert Unbalanced audio I O System HF component connectors Balanced audio I O Power connector Figure 2 7 19 inch rack mounted Central Unit rear panel Figure 2 5 shows the table top Central Unit rear panel Insert Balanced audio I O Serial port Unbalanced audio 1 0 POWER RS 232 Warning Connecting the RU 45 connectors 1o equipment other than Close Talk may result in pro erty damage System HF component connectors Power connector System fuse Figure 2 5 Table top Central Unit rear panel Exterior 9 Figure 2 8 a generation three 19 inch rack mounted Central Unit rear panel AUX port Serial port System fuse Insert Unbalanced audio 1 0 System HF component connectors Balanced audio I O Power connector 10 Figure 2 8 19 inch rack mounted Central Unit rear panel Rear panel compenents are Instrument label Contains manufacturer information and unit serial number Serial port RS 232 compatible serial port used for firmware updates and remote control AUX port For special applications such as telephone hybrid control see page 53 Power connector Power input for the unit and the connected HF system units WARNING Always use a Close Talk approved power supply Use of other power supplies may be a fire hazard and can cause permanent damage to the unit and or other equipment and property System fuse Conference sys
25. he new setting press ENTER The EDIT lamp is turned off and the new setting is stored All saved settings are retained after power off When pressing the SELECT key and the menu item is a function one or more function choices are presented SELECT ENTER POWER EDIT ERROR Figure 3 6 The menu item is a function Figure 3 6 shows an example of a function It is still in browse mode EDIT lamp is off Press the SELECT key to enter the function One or more func tion alternatives are presented SELECT ENTER POWER EDIT ERROR Figure 3 7 The menu item is a function Use the knob to select the desired function Press ENTER to execute the func tion or SELECT to exit without changes Using the front panel 17 18 This concludes the description of the front panel controls Section 4 and 5 will describe the menu structure and all settings in more detail Rev 1 08 Close Talk Central Unit Section 3 Rev 1 08 Section 4 Menu structure Menu structure 19 20 Blank page Close Talk Central Unit Section 4 Rev 1 08 Rev 1 08 Top level menu Figure 4 1 shows the top level of the menu structure Top menu level Global Audio Delegate Units System Lock Unit Figure 4 1 Menu system overview The top menu level is the level entered at power on The following entries are available Global Audio Settings for the Central Unit audio system
26. ive signal or not the factory setting will normally work automati cally for all systems During the final testing of a system installation this ML should be checked and if needed ad justed using the Close Talk Install software This software can also be used to check the communication to Figure 1 Central Unit CU Figure 1 Delegate Unit DU Figure 1 Transceiver Unit TU and from delegate units and to measure the battery quality in delegate units Close Talk Install is available for downloading free of charge from www closetalk se It is intended to be used by qualified installation person nel during installation but is also an efficient way for a local end user mainte nance person to verify system operation independently without the prescence of a qualified technician Close Talk Central Unit Section 1 Rev 1 08 Rev 1 08 Section 2 Exterior Exterior Blank page Close Talk Central Unit Section 2 Rev 1 08 Rev 1 08 Front panel Figure 2 1 shows a generation one wall or table top Central Unit front panel Indicators Rotary knob SELECT ENTER POWER EDT 1 gtk 7 e i 7 Display Buttons Figure 2 1 Wall table Central Unit front panel Figure 2 2 a generation two 19 inch rack mounted Central Unit front panel Display Indicators Rotary knob f Buttons Power switch Figure 2 2 19 inch rack mounted Central Unit front panel Figur
27. l expands the system func tionality with controllable speaker queues roll call voting and more Overview 41 Central Unit Figure 6 2 shows a block diagram of the Central Unit CU The TU s sends the HF signal via cables down to the FM receivers where the signal is band pass filtered and demodulated in four channels Audio 1 to 3 and Data The three audio channels contains a compressed audio signal which is ex panded mixed and band pass filtered The resulting signal is then distrib uted by the CU audio system where it is mixed with external audio compressed and transmitted to the DU s The data channel is filtered and the data pulse train is extracted The pulse train is sent to the computer for reconstruction into the system byte stream data protocol The outgoing system byte stream data protocol is converted by the computer to a pulse train suitable for transmission The computer also manages the display and controls control noise gates au dio input and output levels mixer levels and communicates with a PC via the serial port Receiver FM receiver gt HF Filter Audio 1 P FM receiver Mixer HF Filter H Expander Audio 2 Bandpass filter gt HF Filter FM receiver F Audio 3 IR Audio Outputs Tele amp Line out FM receiver Data signal filter gt HF Filter Data 7 and comparator 42 Audio Inputs Tele amp Lin
28. lose Talk approved power supply Rack and table top models Power consumption 10W transceivers powered by the CU Power requirements Use only Close Talk approved power supply Fuse 4A slow 5x20mm Physical Wall table and early rack mounted models Dimensions WxHxD 234x44x276mm Weight 1 9kg 4 2 Ibs Mounting Wall Rack Line amp Tele connector Phono unbalanced 4 mono tele 50 Close Talk Central Unit Section 7 Rev 1 08 Rev 1 08 Rack and table top models Dimensions WxDxH 480x281x44mm rack 253x290x93mm table Weight 4 5kg 10 lbs rack 4 6kg 10 lbs table Line amp Tele connector Unbalanced 14 mono tele connectors Balanced outputs male XLR 1 GND 2 3 Balanced inputs female XLR 1 GND 2 3 Insert connector Stereo 4 tele connector tip out and ring in Environment Temperature 10 to 40 degrees centigrade All specifications subject to change without prior notice Specifications 51 Null modem cable 25 pin serial port Computer CU 1 1 a M 77 EN lun 7 8 4 ol co 5 Shield Lh w 1 Skols ble Shield Figure 7 1 25 pin connector null modem serial cable 9 pin serial port Computer CU Shield Shield Figure 7 2 9 pin connector null modem serial cable It is generally recommended to use a purchased null modem cable
29. nt delegate unit ID number for the three audio channels has been added for use in simple control applications such as camera control The delegate unit ID number is world wide unique which means that some user configurable cross reference table must be pro vided in order to connect a specific delegate unit to a camera position Please note that using the serial port for customer specified applications would only be possible when the system is used as stand alone i e the PC software Close Talk Control cannot be used simultaneously Contact the local dealer for more information Port settings The serial port settings are fixed to 9600 Baud Hardware flow control e 8 data bits No parity e 1 stop bit The serial port pin out is adapted to commercially available null modem ca bles as shown on page 52 Protocol The serial port uses a proprietary binary protocol as follows Start character 0x01 1 byte Message byte counter 1 byte 24 bit Big Endian Target Unit ID Number 3 bytes e Message specific data portion 1 249 bytes Checksum 1 byte all message characters summed using signed 8 bits 2 s complement 1 Close Talk Central Unit Section 7 Rev 1 08 Rev 1 08 The Audio Channel Usage command is as follows 1 7 0 0 0 82 165 Sending this byte sequence to the central unit will produce an answer in the following format 1 16 0 0 0 82 A1 3 A1 2 A1 1 A2 3 A2 2 A2 1 A3 3 A3 2 A
30. o channel even if all channels are occupied using one of three methods Close Talk Central Unit Section 5 Rev 1 08 Rev 1 08 Methods available Steal Channel The chairman will steal the channel from the speaker that has used it s channel the longest time Borrow Channel The chairman will borrow the channel from the speaker that has used it s channel the longest time After the chairman releases the channel it will be returned to the original speaker Own Channel The chairman will have a dedicated audio channel This reduces the number of regular audio channels available for other delegate units If the Number of Speakers setting is set to one the Own Channel method is not available If so first increase the number of channels to at least two Factory setting is Steal Channel Number of Speakers Figure 5 17 Number of Speakers The Number of Speakers setting specifies how many audio channels that should be available to the delegate units Close Talk Conference System can have a maximum of three simultaneous speakers Use this setting to limit the number of channels Valid settings are 1 to 3 channels If the Chairman setting is set to Own chan nel the chairman is counted and only the choice of two or three channels is available Factory setting is 3 channels Settings and functions 35 Chairman Right Key Figure 5 17 Chairman Right Key The Chairman Right Key setting is used to control extra f
31. pped with a volume knob that may be used to adjust the delegates speaker and headphones levels The Headphones Volume set ting specifies the range of this volume knob for the headphones output by a minimum and maximum level When the delegate unit senses the insertion of a headphone it will automatically switch to this setting The range for the minimum and maximum value is 0 to 31 Factory setting is 16 for minimum and 26 for maximum The function of the Delegate Unit volume knob can be disabled by setting the minimum and maximum value to the same level Delegate Off Figure 5 10 Delegate power Off The Central Unit can save Delegate Unit battery power with the Delegate Off setting This timer specifies for how long the system can be in idle before the Delegate Unit s are turned off This power off time out is reset every time a delegate requests to speak I situations where the system will be left on for a longer period or is used for listen only the function can be turned off The power off time can be set between 1 and 59 minutes or turned off Factory setting is 15 minutes Settings and functions 31 Delegate Silent Figure 5 13 Delegate Silent The Delegate Unit contains a microphone signal detector This detector can be used to make Delegate Unit s that has an audio channel release it automat ically if no one is speaking to preserve battery power and prevent deadlocks The timeout can be set between 1 and 29 minute
32. s Setting that specifies the number of available audio channels Chairman Right Key The right key on the chairman unit can have special channel override functionality Menu structure 23 24 System menu layer Figure 4 4 shows the System menu layer System Serial Num Sec Code Backlight Firmw Vers Figure 4 4 System menu layer The system menu layer contains administrative information and settings for the Central Unit The following entries are available Serial Number Informative The Central Unit serial number Security Code Security code setting for Central Unit locking Backlight Setting for display backlight timeout Firmware version Informative Central Unit firmware version Lock Unit function Function used to lock the Central Unit menu system Close Talk Central Unit Section 4 Rev 1 08 Rev 1 08 Section 5 Settings and functions Settings and functions 25 26 Blank page Close Talk Central Unit Section 5 Rev 1 08 Rev 1 08 Global Audio The Global Audio menu layer contains settings for the Central Unit Audio system Refer to section 6 on page 39 for a better understanding of these set tings EQ Low Figure 5 1 Equalizer low register setting Specifies boost or cut in the low frequency region of the delegate microphone audio signal Maximum value is 12 and minimum value is 12 Factory setting is 0
33. s before contacting support Updates are available for download free of charge About Close Talk Marketing Close Talk Marketing AB is a Swedish company responsible for the develop ment and manufacturing of the Close Talk Conference System product range Close Talk Marketing ships its products using a world wide network of distributors Check the web site at www closetalk se to find a local distrib utor We value your input Please send comments by e mail to sales closetalk se Welcome 3 System description A Close Talk Conference System installa tion consist of a Central Unit CU one or more Transceiver Units TU and an optional number of Delegate Units TU The CU and DU s communicate via in fra red light The CU use one or more TU s to send and receive data and au dio The DU has a built in transceiver unit The system has a total of six channels 2 data and 4 audio The CU has 2 trans mitters 1 audio and 1 data and 4 re ceivers 1 data and 3 audio where FM modulation is used as the information carrier The FM receivers in the CU and DU provides an FM signal strength level indicator which is moni tored by the built in computer The CU can have 20 TU s connected depending on the size and type of room for the installation Each added TU will alter the noise characteristics for the CU FM receiver s A Mute Level is a threshold used internally by the CU to determine whether a channel has an act
34. s or turned off Factory set ting is 5 minutes Chairman Unit 1 and 2 32 Figure 5 12 Chairman Unit The Central Unit can give one Delegate Unit special privileges suitable for the chairman A Delegate Unit with chairman privileges is always guaran teed an audio channel in a manner specified by the Chairman setting see page 34 and will bypass the speaking queue It can also do microphone over ride as described for the Chairman Right Key setting on page 36 In order for the Central Unit to know which Delegate Unit to treat as the chairman unit the Delegate Unit ID number is specified in this setting Turn the intended chairman Delegate Unit up side down and enter the unit serial number found on the unit label Chairman Unit 1 is the primary chairman unit specifier Chairman Unit 2 is in tended as a backup unit setting Both settings may be used for dual chairman functionality in an installation but since the primary use is backup the chair man overriding chairman behaviour may not be the desired one the suit ability needs to be verified prior to use Close Talk Central Unit Section 5 Rev 1 08 Rev 1 08 Besides the microphone guarantee functionality the chairman unit is treated as any other Delegate Unit including power off and Delegate Silent time out settings Factory setting is 00000000 i e no chairman unit Priority Unit Figure 5 14 Priority Unit The Central Unit can give one extra Delegate Unit
35. special privileges A Dele gate Unit with priority privileges is always guaranteed an audio channel by stealing the longest used audio channel if no one is free It will also bypass the speaking queue In order for the Central Unit to know which Delegate Unit to treat as the pri ority unit the Delegate Unit ID number is specified in this setting Turn the intended priority Delegate Unit up side down and enter the unit serial num ber Unlike other Delegate Unit s including chairman the priority unit will never loose it s microphone channel regardless of the Delegate Silent setting This makes a Priority Unit suitable as a platform microphone Factory setting is 00000000 i e no priority unit Start Update Figure 5 15 Delegate Unit firmware update The Central Unit is used to update the firmware in the Delegate Uni s via the infra red communication A copy of the delegate firmware is stored in the Central Unit memory and this function is used for updating Settings and functions 33 The second line shows the current firmware version stored in the Central Unit Check with www closetalk se regularly to see if there is a newer version available New versions will often improve performance of the system The current firmware version is sent over the infra red data link so Delegate Units with lower versions will recognize this and indicate that they need an update by flashing the vote result LED s To update the Delegate
36. such as equalizer delegate microphone sound level Line In and Out levels Tele In and Out levels and Microphone Compensation Delegate Units Settings regarding the Delegate Units such as speaker and headphones sound levels power off delay loose talk channel delay Chairman unit Priority unit firmware update function chairman channel mode number of simultaneous speakers and Chairman Right Key System Administrative information and settings for the Central Unit such as serial number security code backlight time and firmware version Lock Unit Menu function used to lock the central unit to prevent unauthorized changes 21 Global Audio menu layer Figure 4 2 shows the Global Audio menu layer Global Audio EQ Low Del Volume Line In Line Out EQ High Tele In Line gt Tele Mier Comp Figure 4 2 Global Audio menu layer The Global Audio menu layer contains settings for the Central Unit audio system Refer to section 6 on page 39 for more information about the audio system The following entries are available 22 EO Low Low freguency boost or cut for the delegate microphone audio EO High High freguency boost or cut for the delegate microphone audio Delegate Volume Sound level for the delegate microphone audio Tele In Level control for the Tele In rear panel connector Line In Level control for the Line In rear panel connector
37. tem fuse replace with same type and rating Protects the Central Unit and Transceivers connected directly to the Central Unit Balanced and unbalanced Tele amp Line inputs Used for teleconferencing and to input other audio signals for distribution in the conference system Unbalanced inputs use Phono or mono 4 tele connectors Balanced inputs use 3 pin XLR connectors See Specifications on page 47 for more information Balanced and unbalanced Tele amp Line outputs Used for teleconferencing and to output the conference system audio for recording and or distribution Unbalanced outputs use Phono or mono tele connectors Balanced outputs use 3 pin XLR connectors See Specifications on page 47 for more information Insert Used to insert sound processing equipment into the conference system microphone audio Stereo 4 tele connector See Specifications on page 47 for more information Close Talk Central Unit Section 2 Rev 1 08 Rev 1 08 System HF component connectors Used to connect conference system HF components such as Transceivers or Split Boxes to the Central Unit RJ 45 connector Uses high grade signal cables WARNING Only connect Close Talk equipment to these connectors or system damage may occur Only use approved cable types NEVER use common network cables such as Cat 5 or 6 UTP FTP or STP to connect the system Usage of non approved cables will void warranty and system certification Exterior 11 12 Blank P
38. unlocked Important Do not forget the code unlocking a locked unit requires special tools Close Talk Central Unit Section 5 Rev 1 08 Rev 1 08 Section 6 System description System description 39 40 Blank page Close Talk Central Unit Section 6 Rev 1 08 Rev 1 08 Overview Figure shows a block diagram of a conference system setup Transceiver Unit Delegate Unit Transceiver Transceiver Unit Unit Delegate Delegate Delegate Delegate Central Unit Unit Unit Unit Unit Figure 6 1 Conference system block diagram The Central Unit CU has one or more Transceiver Unit s TU connected which transmits and receive s the infra red light signals to and from the Del egate Unit s DU There are 6 infra red light channels available in the sys tem Global data Transmitted from the CU Center frequency is 3 61Mhz Contains administrative communication Global audio Transmitted from the CU Center frequency is 2 92Mhz The main audio signal received by the DU s Audio channel 1 to 3 Transmitted by the DU s Center frequency is 4 84MHz channel 1 2 38Mhz channel 2 and 4 36Mhz channel 3 The microphone audio signal Data channel Transmitted by the DU s Center frequency is 5 61Mhz or 5 32MHz Used for administrative communication An optional PC can be connected to the CU serial port where the Microsoft Windows compatible software Close Talk Contro
39. value can be edited or its function be used o E The menu value is being edited Using the controls The SELECT key is used to move down through the menu layers Pressing SELECT at the menu shown in figure 3 3 will proceed to the next lower layer SELECT ENTER I POWER EDIT ERROR 7 1 yi ClastTathe_ Figure 3 4 Menu with submenu available We are now at the bottom layer as shown by the T indicator in the display A menu value is now visible on the display s second line If the menu item is a function the T indicator is still shown but the second line may show other in formation or be blank To move around the current menu layer use the knob as described earlier To move back up one layer press the ENTER button The ENTER button is also used in edit mode to save changes 16 Close Talk Central Unit Section 3 Rev 1 08 Rev 1 08 To change a value press the SELECT key SELECT ENTER Z POWER EDIT ERROR i Figure 3 5 In edit mode Use the knob to change the setting Unlike the menu system which is circular the value has a minimum and maximum limit where the knob stops respond ing All editing is live i e the editing continuously updates the conference system To abandon the change and restore the original setting press SELECT The EDIT lamp is turned off and the menu returns to browse mode Turning the knob now will move around in the current menu layer as described earlier To save t
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