Operators Manual Klark Teknik Building Walter Nash Road
Contents
1. usava o 69 aU Gavan tdi tic 4 o is e 1s0q Sud h o on 4 0 b i ez NN avaa O TANT a ry NAR 1 SARAS OS avan Ov gt x o p Page 19 QR User Manual Issue 9601 MASTER MODULE The master level controls for the six Aux masters each have solo and on buttons and the solo level may be adjusted In addition the main control room speakers are supplemented by an alternate pair of speaker outputs which have their own level control This control also adjusts the headphone level socket on the module 1kHz test oscillator and talkback mic input complete the facilities on this module On consoles with integral metering left and right master meters are provided on the master module On meterbridge versions a SOLO level meter is provided on the master module thea Ge TM am TALKBACK MICROPHONE On An integral condenser microphone is provided for talkback facilities T BACK LEVEL Adjusts the gain of the talkback mic 1 2 Routes the talkback signal to Aux Buses 1 and 2 useful for when these buses are used as a headphone foldback send gt 119 ja Le hse ALL Routes the talkback signal to all aux buses and all the group buses AUX 1 2 Adjusts the level of the Aux 1 2 output2. emus Page 16 QR User Manual Issue 9601 OUTPUT MODULE Differing from the input module only in that there is no Mic input but a tape input the group module contains the summing amplifier for the group and its output level trim control All other functions including the FX return and splittable EQ are identical to the input module As tape bus metering is provided on these modules only peak and signal present leds are required Only the different functions are described in this section Refer to the Input module for descriptions of the common functions METER ADJUST This is used only for calibration of the 12 segment LED meters You should not need to adjust this under normal conditions Modules with integral meters have two presets one to set the point and one to set the 20dB point BUS TRIM This is used to adjust the overall group output level On the modules with integral LED metering this is a sub panel preset On meterbridge versions this is a full pot with a control knob PEAK Rather than duplicate the full meter provided on the input module a peak led indicates when the signal is close to clipping SIGNAL This is used to indicated the presence of signal above about 20dBu User Manual Issue 9601 Page 17 CONNECTORS AND PIN OUTS Although the outputs and tape inputs are factory set for nominal 4dBu operating lev
3. asse aea 16 OUTPUT MODULE 17 OUTPUT MODULE BLOCK DIAGRAM 1 19 MASTER MODULE OPE 20 MASTER MODULE BLOCK tata sese see 24 NORMAL MULTITRACK RECORDING AND MONITORING 25 EFFECTS SENDS FROM THE MODULE 144 1 41110 25 METHODS OPERATION cccsscsssssssssssssecscccccsssscsssessccccccesssscscccccccsssscsscsccccccsscscsscscecesoesess 25 ADDING EQ TO AN EFFECTS SEND OR HEADPHONE SEND tenen 27 BRINGING EFFECTS BACK ONTO A MODULE 28 ient cesta ardeat e cA LL E E 29 SUBSGROUPEN 5 555 9 48 A 30 30 IEE 31 MASTER MODULE MAIN PCB 31 MASTER MODULE SUB PCB CAU CES 31 USER PROGRAMMABLE FUNCTIONS cssssssscsssssssssecsccsccsesssssecsccccssssscsscececccccsscscsssscecesees 31 IIE TER HED SEEEGCT 32 INPUT AND OUTPUT MODULES 32 SOLO BUS SIGNAL FEED INPUTS AND OUTPUTS 32 AUXILIARY SIGNAL FEEDS 32 CUT B
4. 1 D K 49 97 2 B C 50 98 3 AE 51 99 4 L R 100 5 Wa 101 6 b e 102 7 h k 103 8 p u 104 9 200 105 10 106 11 LL MM 107 12 108 13 CC JJ 109 14 ty 110 15 jn 111 16 cf 112 User Manual Issue 9601 Page 34 QMR PATCHBAY LAYOUT ACT Lm PE ima ea Acie Lamm m E Ium Lamm Lamm Lamm SER e PATCHBAY EDAC CONNECTOR E E 2 2 ON 4 a 18N 5 H T vs 12 4 x 1252 NS e la f gt INC ef fa fo 2 fo 42 z H b m 4 n VIEWED FROM THE MATING SURFACE OF FEMALE CONNECTOR Pins labelled correspond to XLR pin 2 Pins labelled correspond to XLH pin 3 The Bus Link connects all grounds together at the console Prepared by DDA Lta Hounslow Middx Time EDAC 56 PIN FEMALE STANDARD CONFIGURATION Sizo Document Number REV E S6STDFF Date February 13 1992 Sheet 7 or 1 QR User Manual Issue 9601 Page 36 MODULE REMOVAL GENERAL ALIGNMENTS SERVICING INFORMATION The modules are secured by three screw
5. ve hot Ring Signal ve cold Sleeve Ground Output Impedance lt 75 Ohm User Manual Issue 9601 Page 23 MASTER MODULE BLOCK DIAGRAM WYHOVIG 49079 aa Xaa ai vada oovvv vvv Page 24 QR User Manual Issue 9601 NORMAL MULTITRACK RECORDING AND MONITORING INPUT EFFECTS SENDS FROM THE MODULE METHODS OF OPERATION This section has been written to explain how some of the functions are used in practice and with the aid of simple block diagrams shows the signal routing when certain switches are pressed In the normal course of recording using the QMR a signal applied to a mic or line input will be fed via the routing to the tape machine The tape return for the track will be monitored using the output module for that track using a long throw fader of course No special switches have to be pressed to use these basic functions The advantage of monitoring on the output modules becomes evident when it comes to mixdown as there is now no need to move from one side of the console to the other all the EQ an
6. 0 5dB 20kHz 0 1dB Line to Mix gain 0dB 20Hz 0 5dB 20kHz 0 1dB Microphone gain 76dB EIN ref 150 ohm 127dBu Line gain 0dB 24 inputs 82dBu Microphone 50dBu input 4dBu output 0 005 96 Line 4dBu input 4dBu output 0 00596 Adjacent channel IkHz lt 102dB Group to Mix 10kHz lt 100dB Microphone gt 2kOhm Line gt 10kOhm All outputs lt 75 Ohm All outputs to balanced input 26dBu Insert Send unbalanced 21dBu Microphone 6 to 76dB Channel Input to Mix Output Line 10 to 20dB Channel input to Mix output Floor Stand Patchbay LED Bargraph Meterbridge DDA microFILE VCA automation system Midi Muting System QR User Manual Issue 9601 Page 7 INSTALLATION POWER SUPPLY CONNECTIONS AND SETTINGS This section deals with the input and output connections and the power supply details Careful attention must be paid to the earthing arrangements in your studio otherwise ground loops may be formed which will seriously affect the performance of all your equipment The QMR Power Supply is a fan cooled Rack mountable unit which occupies 3U 5 25 of rack space Adequate ventilation should be provided and the airflow around the unit must not be restricted in any way Ideally at least 1U 1 75 of space both above and below the Power Supply should be kept clear The PSU will operate with AC Mains input voltages of 100 120 220 and 240 volts The DC outputs to the console are 18 Volts 18 V
7. DDA s Aux Direct facility is of course provided on the QMR giving each channel the capability of having a dedicated controlled effects send of its own 48V This switches 48 Volts phantom power to the microphone input DO NOT use this function while Dynamic Mics are connected to the input 20dB Switches in a 20dB attenuator for use with high level microphones or to enable the mic input for use with a line level source LINE When pressed routes the LINE input signal to the main signal path in the module The non selected input is available for the FX RETURN function D Phase reverse operates on the selected input to correct for microphone placement problems or incorrect wiring d High Pass Filter Inserts a high pass filter of slope 12dB per octave at a turning point of 100Hz into circuit GAIN Adjusts the gain of the selected input signal Mic or Line The gain range of the Mic input is 2dB to 76dB while the Line input is adjustable between 10dB attenuation and 20dB gain User Manual Issue 9601 Page 11 EQUALISER HF Shelving equaliser section with a break frequency of 12kHz The gain is adjustable from 15dB HI MID Sweepable peaking equaliser section with gain adjustable from 15dB and centre frequencies adjustable from 470Hz to 15kHz LO MID Sweepable peaking equaliser section with gain adjustable from 15dB and centre frequencies adjustable from 70Hz to 2 2kHz LF Shelving
8. Mixing Console FMR Audio Mixing Console Forum PA Matrix Mute Audio Mixing Console Forum Monitor Meterbridge Audio Mixing Console XL200 Audio Mixing Console XL250 The Basis on which Conformity is being Declared The products identified above comply with the protection requirements of the EMC Directive and with the principal elements of the safety objectives of the Low Voltage Directive and the manufacturer has applied the following standards EN 55013 1990 Limits and methods of measurement of radio disturbance characteristics of Broadcast Receivers and Associated Equipment EN 50082 1 1992 Electromagnetic Compatibility Generic Immunity Standard Part 1 Residential commercial and light industry EN 60065 1994 Safety requirements for mains operated electronic related apparatus for household and similar general use The technical documentation required to demonstrate that the products meet the requirements of the Low Voltage Directive has been compiled by the signatory below and is available for inspection by the relevant enforcement authorities The CE mark was first applied in 1996 Signed G M Squires Authority Product Support Manager Date Ist January 1997 Attention The attention of the specifier purchaser installer or user is drawn to special measures and limitations to use which must be observed when these products are taken into service to maintain compliance with the above directive Details of these special
9. and otherwise in all respects in accordance with DDA s recommendations 4 Defects arising as a result of the following are not covered by this Warranty faulty or negligent handling chemical or electro chemical or electrical influences accidental damage Acts of God neglect deficiency in electrical power air conditioning or humidity control 5 Benefit of this Warranty may not be assigned by the End User QR User Manual Issue 9601 Page 5 6 End Users who are consumers should note that their rights under this Warranty are in addition to and do not affect any other rights to which they may be entitled against the seller of the Equipment 7 DDA shall not be liable for any damage caused to persons or property due to 1 Incorrect usage of the Equipment i1 Other equipment attached to the Equipment which is not approved by DDA iii Modifications made by non authorised persons or by using non recommended parts or incorrectly made QR User Manual Issue 9601 Page 6 SPECIFICATIONS Frequency Response Noise DIN Audio Distortion Crosstalk Input Impedance Output Impedance Maximum Output Capability Gain Options The following specifications are common to all QMR consoles and are minimum specifications normally exceeded by all units DDA reserves the right to alter the design of the unit or change the specification without notice in the interest of product development Mic to Mix gain 55dB 20Hz
10. for foldback sends so that the return may be EQ d and even feed the Aux 3 bus with this signal by pressing FX RET located by the Aux 3 control of gt SPLIT EQ EQ MIX RET eee 2809 027 07 USING THE AUX 1 2 AS AN EFFECTS RETURN User Manual Issue 9601 Page 28 TRACK BOUNCING If you start to run out of available tracks on the tape machine it is easy to free some up by mixing a few tracks together and re recording them on another track with very few button presses For example to mix tracks 1 2 3 and 4 together and record the sum on track 7 On the output monitor modules of tracks 1 2 3 and 4 press the routing button for track 7 8 Select TAPE and pan the signal hard left Use the faders on these modules to create a mix of these tracks and monitor the resulting mix on output module 7 by using the fader in BUS input mode or in TAPE mode by using the effects return method above The Bus Trim on output module 7 is the overall level of your mixed sub group going to tape User Manual Issue 9601 Page 29 SUB GROUPING OVERDUBBING Following the previous method route the mixed group to MIX and the overall level of the sub group going to the mix is controlled by the long fader when used in BUS monitor mode If you want to keep the fader free for a tape return use the TAPE input mode and use the R
11. oe abe i AUX 1 2 SOLO PFL solo of the Aux 1 2 output AUX 1 2 ON Enables the Aux 1 2 output Auxes 3 6 have the same level solo and on functions User Manual Issue 9601 Page 20 OSC Adjusts the level of the internal 1kHz oscillator ON Switches on the internal oscillator When switched on theoscillator is routed to all Aux and group buses PHONES ALT LEVEL Adjusts the level of either the headphone output or Alternate Speaker output whichever is selected PHONES Selects the headphone output front panel jack socket ALT Selects the alternate monitor speaker output switching off the main speaker outputs MAIN LEVEL Adjusts the level of the main monitor speaker outputs 2 TRK Normally the monitor output is fed from the stereo mix bus or any SOLO ed source When 2 is pressed the monitor outputs are fed from an external stereo input for example a stereo tape machine return SOLO LEVEL This adjusts the level of the SOLO ed signal fed to the monitors useful when PFL signals are at high levels The LED indicates that a channel or Aux has been SOLO ed User Manual Issue 9601 Page 21 1 m E3 2 m 292 ocaoomaz 4 4 4 7 m f E 1 gt m MAIN gt 70 290 a9 N m 4 m gt d 1 CONNECTORS AND PIN OUTS The Master Modu
12. to be illuminated either for CUT or ON as above The functionality of the switch remains unaltered To light the LED when the channel is cut add link LK 14 To light the LED when the channel is ON add link LK13 The CUT switch can be configured to give any one of three output states for use by the DDA MIDI MUTE system or another proprietary Automation system Links on the PCB select which output will be given when the switch is pressed Link LK10 Gives a high output TTL 5V as long as the CUT button is pressed Link LK11 A latched output taken from the Q output of a 4013 flip flop giving a low TTL 0V signal when a channel is muted reverting to a high TTL 5v when the channel is unmuted Link LK12 A latched output taken from the Q output of the 4013 flip flop giving a high TTL 5V signal when a channel is muted reverting to a low TTL 0V when the channel is unmuted For further information please contact DDA QR User Manual Issue 9601 Page 33 PATCHBAY The only extra connections for the QMR patchbay are the tie lines All inputs and outputs remain connected to the channel XLR s and CONNECTIONS jack s If retrofitting a patchbay make sure to press the switch on each module to enable the link to the patchbay When a patchbay is fitted outputs 13 24 are automatically paralleled with outputs 1 12 EDAC TABLE TIELINE INTERFACE 1 112 PAIR DESCRIPTION
13. ET function to bring the sub group back on the Aux 1 2 controls When overdubbing it is often handy to monitor both the recorded tape signal and the new signal simultaneously for drop in timing With the QMR its easy Use the RET facility to bring the tape signal back on the Aux 1 2 controls leaving the TAPE BUS switch up Monitor your BUS signal on the fader You can adjust both levels easily and independently and know exactly when to drop in to record QR User Manual Issue 9601 Page 30 OUTPUT MODULE MASTER MODULE MAIN PCB MASTER MODULE SUB PCB AUXES USER PROGRAMMABLE FUNCTIONS There are a few options which it is possible for you to configure yourself If you are in any doubt as to whether you can perform these changes please refer to your Dealer The main option is that the main outputs and tape returns may be set to work with nominal levels of 10dBV instead of the factory set nominal 4dBu This means level matching is possible with machines such as Tascam or Fostex which normally operate at 10 levels There are links on the PCB s of the output modules and master modules which when removed or added allow the console to operate at these levels Bus Input To operate at 10 add link LK29 Tape Monitor Input To operate at 10dBV add link LK3 Bus Output To operate at 10dBV add link LK15 Mix Tape Output To operate at 10dBV remove LK3 and LK4 Stereo Tape Input To operate at 10dBV add lin
14. PUT STAGE There are no adjustments to calibrate the gain at any point however checks can be made by using the insert sends The nominal level here for an external signal of 4dbu is 2dBu that is 6dB lower than you might expect The insert return can also be used to insert a signal of 2dBu to check the signal path to the routing or to the direct output for example QR User Manual Issue 9601 Page 38 CIRCUIT DIAGRAMS CD1151 STANDARD INPUT CD1152 STANDARD OUTPUT CD1156 MASTER MODULE CD1154 12 SEGMENT METER CD1166 12 CHANNEL BARGRAPH CD1167 16 CHANNEL BARGRAPH CD1164 TIE PATCH CD1219 AUDIO PSU CD1173 MIDI MUTE PCB CD1183 MASTER PATCH CD1182 OUTPUT PATCH CD1181 INPUT PATCH CD1174 POWER DISTRIBUTION CD1155 AUX MASTER QR User Manual Issue 9601 Page 39 User Manual Issue 9601 Page 40
15. QMR Operators Manual Klark Teknik Building Walter Nash Road Kidderminster Worcestershire DY11 7 Tel 44 0 1562 741515 Fax 44 0 1562 745371 Email info uk telex com Website www ddaconsoles com QMR Operators Manual Telex Communications UK Limited In line with the company s policy of continual improvement specifications and function maybe subject to change without notice This Operator Manual was correct at the time of writing E amp OE Contents DECLARATION OF CONFORMITY cccsscssssssssssssssccecssccccsssssssnecsccccccsssssssscececcccssesscssececcsoses 3 GENERAL INFORMATION cisccssscciccsssctsseccnececbasescscdseoseccesacsetccessndoceepesdbessensooceiscsesessoesdacbeasecoesevess 4 WARRANT Y E 5 SPECIEICATIONS n a a ota a a 7 INSTALLATION CES 8 POWER SUPPLY CONNECTIONS AND SETTINGS 1 cccsssssssssscccssssscsssecssccccsssssssssceccsoses 8 AUDIO WIRING ossosa 9 CONSIDERATIONS 9 ROTTEN mr rE 10 THE INPUT MODULE an suae 11 EQUALISER escas qo tob eve PR Cou dU P spi eee YMO E PER 12 13 INPUT MODULE BLOCK DIAGRAM eee eee ee
16. UTTON LUMINATION data due 33 CUT SWITCH OUTPUT TO MIDI MUTE OR AUTOMATION SYSTEMS 33 PATCHBAY 225020500 pono ro e eee an eee ea ee e PR uad ss vo 34 QMR PATCHBAY LAYOUT tiene 35 PATCHBAY EDAC CONNECTOR 1 1 tete tasa sese ete ette sees sese a eee 36 MODUEE REMOVE S SNR A oak as 37 GENERATCATIGNMENEGA tr ente ient quotes es mc anch 37 SERVICING INFORMATION esa eon HU ee 37 10a dO Eu mane 38 de Mi trad A cama eet Nadi 38 CIRCUIT DIA GRAMS 39 User Manual Issue 9601 Page 2 Declaration of Conformity The Manufacturer of the Products covered by this Declaration is Klark Teknik Building Walter Nash Road Kidderminster Worcestershire DY11 7 The Directives Covered by this Declaration 89 336 EEC Electromagnetic Compatibility Directive amended by 92 31 EEC amp 93 68 EEC 73 23 EEC Low Voltage Equipment Directive amended by 93 68 EEC The Products Covered by this Declaration Equipment type Product Name Variants Audio Mixing Console Q2 2 Audio Mixing Console 02 Monitor Meterbridge Audio Mixing Console QMR Meterbridge Audio
17. artists with level and HEADPHONE SEND pan controls You may add some EQ if desired by pressing the SPLIT EQ button which puts the HF and LF controls in the feed to the Aux 1 2 buses leaving the two mid band sections in your main channel path On the output module you could use this facility to set up two different stereo mixes if required perhaps for multi lingual produc tions where different vocal tracks could be mixed simultaneously o EQ Mid s 1 1 t i 03 BI EQ SPLITTING THE EQ FOR FOLDBACK SEND op RET FX RET SPLITTING AUXES User Manual Issue 9601 Page 27 BRINGING EFFECTS BACK ONTO A MODULE Having used the DIRECT output to send a signal off to a device it is easy now to bring the effect return back onto the same module using the RET function Pressing RET converts the function of the Aux 1 2 controls and instead of feeding the channel signal to the Aux buses they now feed the alternate input directly to the stereo mix bus As an example The Mic input is being fed into the normal channel path and through the EQ and auxes to the routing section and off to tape Press RET and the Line input is fed to the Aux 1 2 controls and from there is routed directly to the stereo bus You can even add EQ as mentioned above
18. be optionally used to control the channel s direct output via DIR to use the single channel as an effects send so keeping the Aux 4 bus free for multiple signal sends PRE This selects the Aux 4 send to be prefader rather than post fader AUX 5 6 This single control adjusts the level of the signal feed to both the Aux 5 and Aux 6 buses The switches alongside act as mutes for each of the 2 sends When both are on the pot may be used as a stereo level send to an effects device User Manual Issue 9601 Page 13 PAN Pans the signal between the Left and Right stereo mix buses and between odd and even group buses when selected ON Enables the channel output with LED indication LED Meter Indicates presence of signal above the threshold of 13dBu up to the peak indication of 17dBu Signals illuminating this top led are approximately 4dB below clipping SOLO This button is PFL Pre Fade Listen and solo s the signal to the monitoring outputs only the main stereo mix output is unaffected Internal links allow this SOLO to be APL if desired ROUTING Routing to the 12 buses is in pairs Selection of any routing destination automatically inserts the PAN control into circuit User Manual Issue 9601 Page 14 INSERT TIP SEND RING RET CONNECTORS AND PIN OUTS The main Inputs are electronically balanced while the insert send return are unbalanced and the direct output is ground sensi
19. d aux settings are already in place The block diagram below shows the general signal flow Co SES MULTITRACK OUTPUT TAPE RECORDER MONITOR EFFECT TYPICAL RECORDING CONFIGURATION The standard method of sending a signal to an effects device is of course to use an aux bus There are times however where there is a need to send just a single microphone to a reverb unit for example In this situation using an entire aux bus works but means you now have one less bus for all your other effects sends or foldback feeds User Manual Issue 9601 Page 25 Using the DIRECT output you can send that channel signal through the channel s direct output with control through the Aux 4 pot and keep the Aux 4 bus free for a group of signals which require that facility _ lt gt lt lt TO AUX BUSES 1 2 TO AUX BUS Pa TO DIRECT OUTPUT m 400 TO AUX BUSES 5 6 USING AUX 4 AS A DIRECT OUTPUT This function could also be used to save your multitrack groups as again if you needed all 12 buses for grouped signals you could use the direct output for a single signal and route it to tape that way User Manual Issue 9601 Page 26 ADDING EQ TO AN Aux buses 1 2 are configured so that they can be used as a stereo EFFECTS SEND OR send to an effects device or foldback feed to
20. els you may by changing links on the module have these operate at 10dBV to match tape machines which operate at this level Group Output 3 pin XLR type balanced Nominal Output Level 4dBu 10dBV RING RET Pin 2 Signal ve hot Pin 3 Signal ve cold Pin 1 Ground Output Impedance lt 75Ohm Tape Return Input 1 4 TRS Jack Gauge balanced Nominal Input Level 4dBu 10dBV Tip Signal ve hot Ring Signal ve cold Sleeve Ground Input Impedance 10kOhm Bus Monitor Input 1 4 TRS Jack A Gauge balanced Nominal Input Level 4dBu 10dBV Tip Signal ve hot Ring Signal ve cold Sleeve Ground Input Impedance gt 10kOhm Insert Send Return 1 4 TRS Jack A Gauge unbalanced Nominal Input Output Level 2dBu Tip Insert Send Ring Insert Return Sleeve Ground Send Output Impedance 75 Ohm Return Input Impedance gt 10kOhm User Manual Issue 9601 Page 18 OUTPUT MODULE BLOCK DIAGRAM T 75 T WSUS ASW 49078 NYNLIY INOYO HNO ZZSCTISTWO PW 340 e v Sevvvvvvitreezoseeziua ino sna 2
21. equaliser section with a break frequency of 50Hz The gain is adjustable from 15dB EQ IN Switches the equaliser into circuit with led indication HF LF TO AUX SPLIT EQ The mid band section is always located in the main channel signal path The HF LF section may be placed in the path containing the auxiliary 1 2 controls using this switch whether they are being used as aux sends or for an effects return so that a headphone send may be EQ d for example or an effects return User Manual Issue 9601 Page 12 AUXILIARIES AUX 1 2 This pair of controls level and pan are used to feed the signal to the Aux 1 and 2 buses If these buses are used as a headphone feed you may add 2 bands of EQ using the SPLIT EQ function above RET This enables the Aux 1 2 controls for use as the second or Alternate input When pressed the non selected input is routed via these controls to the stereo mix bus allowing an effects return or additional tape input As above 2 bands of EQ may be added using the SPLIT EQ function AUX 3 This adjusts the level of channel signal sent to Aux bus 3 When FX RET is pressed the signal is fed from the signal present on the alternate input FX RET When pressed this feeds the Aux 3 bus from the alternate input allowing this input to have an aux send PRE This selects the Aux 3 send to be pre fader rather than post fader AUX 4 Apart from feeding the Aux 4 bus this control can
22. ese possibilities may be found in the section on operating practices User Manual Issue 9601 Page 4 WARRANTY 1 If within the period of twelve months from the date of delivery of the equipment to the End User it shall prove defective by reason only of faulty materials and or workmanship but no faulty design to such an extent that the effectiveness and or the usability thereof is materially affected the Equipment or the faulty component shall be returned to the Distributor or DDA and subject to the following conditions the Distributor or DDA will repair or at its option replace the defective components Any components replaced will become the property of DDA 2 Any Equipment or component returned will be at the risk of the End User whilst in transit both to and from the Distributor or DDA and postage and or freight charges must be prepaid 3 This Warranty shall only be available if 1 The Equipment has been properly installed in accordance with the instructions contained in this manual and The End User has notified the Distributor or DDA in writing within 14 days of the defect appearing and No persons other than authorised representatives of DDA or the Distributor have effected any replacement of parts maintenance adjustments or repairs to the Equipment and iv The End User has used the Equipment for such purposes as DDA recommends with only such operating supplies as meet specifications or approval
23. h external hum fields will be induced 6 In areas where high levels of radio frequency interference are present the open end of the screen can be connected to earth through a 0 01 microfarad capacitor This will appear as a short circuit at high frequencies and lower the effective shield impedance to earth However at audio frequencies the reactance of the capacitor will be sufficiently high to not cause an earth loop 7 In general the screen should be connected at the signal source and not at the signal destination The exception to this rule of thumb is when connecting to an unbalanced input or to an electronically balanced input In these cases the wires being screened are referenced to the destination earth QR User Manual Issue 9601 Page 9 ATTENTION 8 Electronically balanced outputs which are to be operated in the unbalanced mode should be unbalanced at the output connector not at the signal destination so that the signal current returns to earth via the shortest least reactive route 9 Rack mounted equipment which has unbalanced inputs and outputs may need to be electrically isolated from the equipment rack and or other equipment to avoid earth loops DO NOT DISCONNECT THE MAINS EARTH Connect all equipment in a logical sequence starting with the monitor systems followed by the multitrack and then the stereo machines and the peripheral devices and isolate any earth loop problems as they occur It is very difficult to
24. ks LK1 and LK2 Aux Outputs To operate at 10dBV remove all the following LK1 LK21 LK41 LK61 LK81 LK101 User Manual Issue 9601 Page 31 METER FEED SELECT INPUT AND OUTPUT MODULES SOLO BUS SIGNAL FEED INPUTS AND OUTPUTS AUXILIARY SIGNAL FEEDS The LED meters may be fed from any one of four signals taken at various points in the signal chain The feed is selected by links on the PCB Only ONE link may be used at any time For a pre gain control feed add link LK30 For a post gain control feed add link LK31 For a pre fader feed add link LK32 For a post fader feed add link LK33 Links on the PCB allow the SOLO signal to be pre fader PFL or post fader AFL Again only one link is needed as follows For PFL add link LK9 For AFL add link LK8 Auxes 3 and 4 have front panel switches to allow Pre or Post fader signal feeds Auxes 1 2 and 5 6 may be fed either pre or post fader by links on the PCB Only one link is necessary for each auxiliary feed For Aux 1 2 Pre Fader add link LK5 For Aux 1 2 Post Fader add link LK4 For Aux 5 6 Pre Fader add link LK7 For Aux 5 6 Post Fader add link LK8 User Manual Issue 9601 Page 32 CUT BUTTON ILLUMINATION CUT SWITCH OUTPUT TO MIDI MUTE OR AUTOMATION SYSTEMS The CUT or MUTE button may have its led indicate either when the channel is muted or when the channel is ON The factory default is CUT Links on the PCB allow the LED
25. lations are not infringed or negated QR User Manual Issue 9601 Page 8 AUDIO WIRING 1 Decide on a central point for the main earth system and star feed to all mains outlets and equipment racks from this point Common electrical wiring practice is to daisy chain earth wires from outlet to outlet but this is not recommended for audio installations The location of the earth system star point should be in a convenient easily accessible position such as the main equipment rack The star point must then be connected to the incoming mains earth or in extreme cases to a totally separate technical earth if local regulations permit 2 Install separate clean and dirty mains outlets wired individually to the mains distribution box Use the clean supply for all audio equipment and the dirty supply for all lighting vending machines etc Do not mix the two systems 3 It may be necessary to install an isolating transformer for the clean supply to ensure adequate isolation from mains borne inter ference The isolating transformer must be of adequate current capability and should incorporate a Faraday Shield connected to the incoming mains earth 4 All audio connecting cables should be good quality twin screened cable Do not use single screened cable 5 It is very important that the screen is not used as the signal return Therefore connect the screen at one end only Connecting the screen at both ends will cause an earth loop into whic
26. le provides connectors for the main stereo output and two pairs of monitor outputs Input connectors are provided for a stereo tape machine return for monitoring The Stereo Mix Output and Stereo Tape Return input are electronically balanced while the Main and Alternate Monitor outputs are ground sensing unbalanced The Mix Insert Send and Returns are unbalanced The table below gives the pin outs of each connector together with their nominal operating levels Mix Output 3 pin XLR type balanced Nominal Output Level 4dBu 10dBV Pin 2 Signal ve hot Pin 3 Signal ve cold Pin Ground Output Impedance lt 75 Ohm Stereo Tape Input 3 pin XLR type balanced Nominal Input Level 4dBu 10dBV Pin 2 Signal ve hot Pin 3 Signal ve cold Pin 1 Ground Input Impedance gt 10 kOhm Main and Alternate Monitor Outputs 1 4 TRS Jack A Gauge ground compensated unbalanced Nominal Output Level 4dBu 10dBV Tip Signal Ring Compensated Ground sense Sleeve Ground Output Impedance 75 Ohm User Manual Issue 9601 Page 22 A separate panel on the chassis provides the output connectors for all the Auxiliary outputs which are all electronically balanced on 1 4 jacks The table below gives the pin outs of each connector together with their nominal operating levels Auxiliary Output 1 4 TRS Jack A Gauge balanced Nominal Output Level 4dBu 104 Tip Signal
27. measures and limitations to use are available on request and are also contained in product manuals QR User Manual Issue 9601 Page 3 GENERAL INFORMATION Your QMR console has been designed to meet exacting performance specifications offering very flexible facilities but retaining easy operation In addition the QMR can grow as you do through a number of expansion possibilities To the standard frame you can retrofit 1 A meterbridge 2 A patchbay 3 An Expansion Chassis containing a further 8 inputs 4 Midi Mute Automation or VCA Fader Automation The patchbay addition requires no electronic modification nor does it entail any studio re wiring as it simply bolts onto the chassis and connects to the modules via ribbon cables By pressing a switch on each module all input and output connections are routed via the patchbay with tie lines being provided on EDAC multiway connectors The QMR is a 12 Bus console with 6 Auxiliary buses and 24 Track monitoring A very flexible Auxiliary system allows a single controlled effects send from a channel and an effects return to be routed to the stereo mix bus on the same module with or without 2 band EQ in circuit Both Mic and Line inputs may be utilised simultaneously using the FX RETURN function to route one signal to the mix as mentioned above Both the equaliser and auxiliary sections may be split to provide this second input with EQ and Aux feeds Further details on th
28. ng unbalanced Mic Input 3 pin XLR type balanced Nominal Input Level 72dBu to 2dBu Pin 2 Signal ve hot Pin 3 Signal ve cold Pin 1 Ground Input Impedance 2kOhm Line Input 1 4 TRS Jack A Gauge balanced Nominal Input Level 16dBu to 14dBu Tip Signal ve hot Ring Signal ve cold Sleeve Ground Input Impedance gt 10kOhm Insert Send Return 1 4 TRS Jack A Gauge unbalanced Nominla Input Output Levels 2dBu Tip Insert Send Ring Insert Return Sleeve Ground Send Output Impedance 75Ohm Return Input Impedance 10kOhm Direct Output 1 4 TRS Jack A Gauge Ground Compensated Nominal Output Level 2dBu Tip Signal Ring Compensated Ground Sleeve Ground 0V Audio Output Impedance lt 75Ohm User Manual Issue 9601 Page 15 INPUT MODULE BLOCK DIAGRAM 35 resus a requinn weunsea 49078 ena 2296 229 190 1912025 SL XOAN MOISNNOH vaa oros EN EV Nau
29. olts and 48 Volts LEDs mounted on the front panel indicate when these outputs are present Each DC line is fuse protected and the fuse is located next to its indicator LED on the front panel The operating voltage is selected by the rear panel mounted fuse holder To set the voltage for different local conditions from that already set first remove the IEC Mains cable and then remove the fuse holder carefully with a flat bladed screwdriver Align the required voltage with the arrow mark on the body of the connector and replace the fuse holder Ensure that the correct rating of fuse for the local supply voltage is fitted This value is labelled on the PSU by the fuse holder The PSU connects to the mains by a standard IEC lead supplied with your console DO NOT disconnect the mains earth The PSU connects to the console via a single multiway cable which is non reversible To take full advantage of the excellent audio performance of DDA mixing consoles it is essential that the installation is carried out with care and attention All audio signals are referenced to the system earth which must be clean and noise free and essentially equipotential In addition the earth system integrity is absolutely necessary for safety Do not disconnect the mains earth wire from each piece of equipment as this could create a hazardous situation If in doubt consult a competent engineer and your local electricity supply company to ensure that safety regu
30. rectify a problematical installation after everything has been connected due to interaction between the various earth loops CABLES This product should only be used with high quality screened twisted pair audio cables terminated with metal bodied 3 pin XLR connectors The cable shield should be connected to Pin 1 Any other cable type or configuration for the audio signals may result in degraded performance due to electromagnetic interference ELECTRIC FIELDS Should this product be used in an electromagnetic field that is amplitude modulated by an audio frequency signal 20Hz 20Khz the signal to noise ratio may be degraded Degradation of up to 60dB at a frequency corresponding to the modulation signal may be experienced under extreme conditions 3V m 90 modulation No permanent damage or degradation of performance will be caused by these conditions User Manual Issue 9601 Page 10 THE INPUT MODULE The Alternate Input Switch stage makes maximum use of the available signals so that while one is active on the main signal path the other can be routed to the effects return path to the stereo mix doubling the console s capacity in mixdown The second path is referred to below as the alternate input signal This input switching is totally automatic and easy to monitor The return path is enabled when Aux 1 2 are selected as FX return Further options for the use of the FX Return include adding EQ and an aux send
31. s two on the front face and a third on the rear panel To remove a module first of all remove the upper and lower identification strips then remove the 3 screws The module can now be lifted from the console and the bus cable removed before lifting it totally clear Beware of any external connections to the module which may prevent it from being removed Meter wiring is connected via the rear panel and should be disconnected from a module prior to its removal There are very few adjustments on the QMR console and where possible meter alignments are accessible from the front panel Meter alignments are very simple Measure the required output on an external meter and set it to 4dBu and adjust OVU pot to just illuminate the LED at the scale marking for Then adjust the audio output level to be 17dBu and adjust so that the bottom LED is just on Re check the zero point and then the 17 point again adjusting if required Normally the only adjustment required will be the OdB pot QR User Manual Issue 9601 Page 37 OUTPUT BALANCE CALIBRATION The output balance can be set by using a pair of accurately matched 1k resistors across the output and measuring the centre point Adjustment is made by finding the smallest possible signal at the null point See drawing CD1008 ADJUST PR2 FOR MINIMUM SIGNAL ON METER 1KhZ A TYPICAL VALUE 15 ABOUT 40DBu 1k better than 17 1k better than 1 OUT
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