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Telex Music Mixer Q II - FOH User's Manual

1. if factory installed 1 VCA fader 2 Audio fader 3 Aux 3 normal 4 Aux 3 depends on DIR switch 5 CV Input 6 VCA Mute T Ground Link 27 Stereo module 28 Mono module Note that if an external fader is used then LK7 should be removed and the fader wired as shown in the drawing AS1358 1 Q2 OPERATION AND MAINTENANCE MANUAL 9601 81 OUTPUT MODULE The output module sub board varies according to the output module that it is fitted to It may require 1 2 or 3 VCAs to be fitted and there is no auxiliary enable switching The control voltage circuits are identical to those found on the input VCA sub board as are the VCA circuits A mono module requires 1 VCA a stereo module requires 2 VCAs and of course an LCR output module requires 3 VCAs to be fitted OUTPUT SUB BOARD LINKS LK Function if factory installed 1 VCA fader 2 Audio fader 3 CV Input a ADJUSTMENTS The only adjustments that may be required are to trim the distortion of the VCAs Input module PR2 Output Module PR2 PR4 PR6 Sending a signal of OVU 1kHz through the VCA with the gain at unity the distortion should be trimmed for a null Q2 OPERATION AND MAINTENANCE MANUAL 9601 82 VCA MASTER MODULES The VCA master module contains two VCA group master faders and their associated cut switches A reference voltage of 5V is fed to the faders and applied to ICs 12A and B where it is offset by a fraction of the original reference voltage The output of
2. indication Similarly for assigns 2 3 4 5 6 7 and 8 If the VCA option is fitted then the channel level will depend upon the position of the channel fader and the VCA group master Internal links allow the MUTE GROUPS to become SCENE PRESETS that is when a MASTER is pressed all assigned channels are switched ON not muted Q2 OPERATION AND MAINTENANCE MANUAL 9601 46 C GROUP GROUP R L Ler CONNECTORS AND PIN ASSIGNMENTS Group Output 3 Pin XLR type Balanced Nominal Output Level 4dBu Pin 2 Signal ve Hot Pin 3 Signal ve Cold Pin 1 Ground Output Impedance lt 75 Ohm Matrix Output 3 Pin XLR type Balanced Nominal Output Level 4dBu Pin 2 Signal ve Hot Pin 3 Signal ve Cold Pin 1 Ground Output Impedance lt 75 Ohm Insert Send 1 4 TRS Jack socket A Gauge Balanced Nominal Output level 4dBu Tip Signal ve Hot Ring Signal ve Cold Sleeve Ground Output Impedance lt 75 Ohm Insert Return 1 4 TRS Jack Socket A Gauge Balanced Nominal Input Level 4dBu Tip Signal ve Hot Ring Signal ve Cold Sleeve Ground Input Impedance gt 10 kOhm Q2 OPERATION AND MAINTENANCE MANUAL 9601 FOLDBACK MASTER MODULE F B 1 LEVEL Adjusts the level of the Foldback 1 Master output signal ON Enables the Foldback 1 Master output signal with led indication CUE SOLO Solo s the Foldback signal to the main monitors headphones o
3. the VCA control reverts to a fixed unity gain setting This is useful for quickly resetting all inputs to their nominal gains as set on their individual faders VCA MASTER FADER 100mm Controls the overall level of all the channels assigned to that group Q2 OPERATION AND MAINTENANCE MANUAL 9601 60 EFFECTS RETURN INPUT B LEFT CONNECTORS AND PIN ASSIGNMENTS LINE A 3 Pin XLR type Balanced Nominal Input Level 4dBu Pin 2 Signal ve Hot Pin 3 Signal ve Cold Pin 1 Ground Input Impedance gt 10 kOhm LINE B 1 4 TRS Jack Socket A Gauge Balanced Nominal Input Level 4dBu Tip Signal ve Hot Ring Signal ve Cold Sleeve Ground Input Impedance gt 10 kOhm Q2 OPERATION AND MAINTENANCE MANUAL 9601 THE AUDIO MASTER MODULE Q2 TECHNICAL DESCRIPTION This consists of two main boards and one sub board The sub board carries the balanced tape inputs balanced mix outputs balanced Left Centre and Right monitor outputs and the Left AFL Meter The tape signals are fed down to the audio master board while the mix and monitor outputs are fed in to the sub board from the master board The main audio board carries the Right AFL meter and the main circuitry for the Left Centre and Right outputs of the console in addition to the monitoring functions Typically the signal path from the left mix bus to the mix output is as follows The signal from the LEFT bus is mixed in a virtual earth am
4. First of all it is necessary to understand that input priority is the normal condition in which any input solo will cancel an output solo for its duration Multiple input and output solos can be active in this mode Interlock mode means that only one solo in the console can be active at any time The reset button can be used to clear the last required solo Consider first of all an input solo in the input priority condition The solo makes the output of IC44 pin 1 go low causing TR1 to switch on which in turn causes TR2 to switch on giving INPUT SOLO indication Pin 7 of IC44 will go high as it will invert the low from pin causing TR4 to switch on which in turn switches TR8 on The causes the RESET line to stay in a high condition which disables the solos on the output modules Q2 OPERATION AND MAINTENANCE MANUAL 9601 63 Further input solos can be added and the reset button can be used to cancel them If a solo is to be cancelled from the master reset button then a positive voltage is fed to the base of TR9 to switch it on causing the reset line to go low Some means must be used to turn off TR8 as otherwise the Vdd and Vss rails would be shorted together and TR3 is turned on to prevent this from occurring In the INTERLOCK position of the switch pin 1 of IC44 is also fed to IC45 which is configured as a virtual earth mixer Pin 7 of IC45 will thus go high and be applied to the voltage comparator IC46 With only one solo active this comparato
5. Group to the Matrix buses but feeds from the Groups etc to the Matrix F B 1 3 Adjusts the level of the Foldback 1 master output or 3 fed to the Stereo Matrix bus on the module This may be used to feed a global mix set up on the F B 1 bus to any of the 8 Stereo Matrix outputs The control is a dual concentric pair with Level and Pan adjust across the Stereo Matrix F B 3 switch Selects the Foldback output 3 to the matrix instead of F B 1 F B 2 4 Adjusts the level of the Foldback 2 master output or 4 fed to the Matrix bus on the module The control is a dual concentric pair with Level and Pan adjust across the Stereo Matrix F B 4 switch Selects the Foldback output 4 to the matrix instead of F B 2 L R Adjusts the level of the main Stereo Left and Right outputs fed to the Stereo Matrix on the module MONO Adjusts the level of the main Mono centre signal from the main Mono output fed to both sides of the Stereo Matrix on the module 1 Adjusts the level of the post fader Stereo Group 1 signal input to the Stereo Matrix Similarly for Controls 2 8 for Group signals 2 to 8 Q2 OPERATION AND MAINTENANCE MANUAL 9601 40 T B Enables talkback signals to be routed to the Matrix output when the communication system is used with led indication This can be used to prevent talkback signals going to unwanted destinations ON Enables the Matrix output with led indication MATRIX METER L and R Sub panel preset us
6. amplifiers and a talkback microphone amplifier for the headset microphone The 4 auxiliaries are identical and therefore it is only necessary to describe one The signal from the bus is mixed by IC1 and is then passed through the fader followed by the ON switch to an SSM2142 balanced line driver which connects to the rear panel on the console A feed for the meters and the solo system is taken immediately after the ON switch There are headphone amplifiers for the front panel headphone sockets and another amplifier to feed the headset A separate talkback amplifier exists for the headset microphone and this is fed to the COMMS board Q2 OPERATION AND MAINTENANCE MANUAL 9601 66 THE FOLDBACK MASTER MODULE This contains the four master foldback sections which are identical to the auxiliary master sections A matrix link connector takes the foldback outputs across to the output modules for use on the matrices Q2 OPERATION AND MAINTENANCE MANUAL 9601 67 THE INPUT MODULE THE SIGNAL PATH The Q2 is equipped with a microphone and a line input selected by a switch and controlled by the same pot The microphone input may have a 20dB pad switched in and a phantom supply can be fed to the microphone from each module From here the signal enters or by passes a phase reverse circuit which is simply a unity gain inverting stage The signal then enters or by passes the sweepable high pass filter At this point the equaliser can be selected pre or p
7. and or freight charges must be prepaid This Warranty shall only be available if 1 The Equipment has been properly installed in accordance with the instructions contained in this manual 11 The End User has notified the Distributor or DDA in writing within 14 days of the defect appearing ili No persons other than authorised representatives of DDA or the Distributor have effected any replacement of parts maintenance adjustments or repairs to the Equipment iv The End User has used the Equipment for such purposes as DDA recommends with only such operating supplies as meet DDA s specifications or approval and otherwise in all respects in accordance with DDA s recommendations 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 defficiency in electrical power air conditioning or humidity control Benefit of this Warranty may not be assigned by the End User 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 Q2 OPERATION AND MAINTENANCE MANUAL 9601 7 DDA shall not be liable for any damage caused to persons or property due to i Incorrect usage of the Equipment 11 Other equipment attached to the Equipment which is n
8. signal From the fader buffers the left and right signals both go through IC17 again an SSM2402 which cuts the post fader effect return signals A pan stage follows and from here the signals can be routed to the various buses Q2 OPERATION AND MAINTENANCE MANUAL 9601 83 Auxiliaries 1 2 and Foldbacks 1 2 can be accessed by the effect return and links 1 8 determine the signal that will be the source for these feeds The mute control circuits and solo circuits are as previously described for other modules in the Q2 console VCA Master Links LK Function if factory installed 1 FB1 2 Pre 7 2 FB1 2 Post 3 FB1 2 Left Pre 4 FB1 2 Left Post 5 Aux1 2 Pre 6 Aux1 2 Post S 7 Aux1 2 Right Pre 8 Aux1 2 Right Post 9 Non VCA Link 10 Group Scene 11 Group Mute 12 Cut Lamp 13 On Lamp 14 Cut Lamp Flash 23 VCA to bus 1 24 VCA to bus 3 25 VCA to bus 5 26 VCA to bus 7 29 VCA to bus 2 30 VCA to bus 4 31 VCA to bus 6 32 VCA to bus 8 Q2 OPERATION AND MAINTENANCE MANUAL 9601 84 Links 15 22 are used for bus routing and are installed as follows Link Standard Input Stereo Mono 16 15 16 TE 17 il 18 a 19 20 j 21 A 22 Q2 OPERATION AND MAINTENANCE MANUAL 9601
9. to Auxiliary buses 1 and 2 and 3 and 4 respectively GROUPS Assigns the generator and or talkback to all the Group buses MTX Assigns the generator and or talkback to all the Matrix buses which have their T B assign buttons pressed L R Assigns the generator and or talkback to the main Left and Right outputs MONO Assigns the generator and or talkback to the main Mono centre output Q2 OPERATION AND MAINTENANCE MANUAL 9601 51 d 12 re ve Ey ELEI MONITOR SECTION Any of three sources may be fed to the monitoring section in addition to the CUE SOLO signal If no source is selected nothing is heard on monitors until a CUE SOLO is pressed TAPE Selects the Tape input as the monitor source L R Selects the main Stereo Left Right output as the monitor source MONO Selects the main Mono output as the monitor source If both L R and MONO are pressed monitoring is in true LCR mode ie three channel outputs for simulation of the main speaker system This facility is very useful when the console is located in a screened booth in a Theatre MONITOR LEVEL Adjusts the level of the monitor outputs MONO Assigns the monitor outputs to the mono centre monitor output DIM Reduces the level of the monitoring system by 20dB ON Enables the monitoring system Q2 OPERATION AND MAINTENANCE MANUAL 9601 52 CUE SOLO MASTER SECTION PFL AFL Selects the Cue Solo mode to be PFL or AFL when the switch is depre
10. ve Cold Sleeve Ground Output Impedance lt 75 Ohm Q2 OPERATION AND MAINTENANCE MANUAL 9601 27 VCA INPUT MODULE Q2 may also be supplied with 8 VCA Mute groups The input module is essentially the same as the standard mono input with the addition of the 8 VCA Mute groups and mutes on most of the auxiliary sends Replacing 4 input modules are the VCA master modules which are the fader and mute masters to control the 8 VCA Mute groups Each module has 2 such masters and a stereo effects return input Only the differences from the standard module are described here which are in fact all on the lower section of the module Q2 OPERATION AND MAINTENANCE MANUAL 9601 28 LL Dg E F B 1 2 ON Enables the channel feeds to the foldback buses 1 and 2 F B 3 4 ON Enables the channel feeds to the foldback buses 3 and 4 AUX 1 2 ON Enables the channel feeds to the foldback buses 1 and 2 EXT This led illuminates when the channel is muted via an external source for example a noise gate control system using the channel VCA The remote control input accepts a DC voltage in the range 0 10V This facility is not available on current consoles unless to special order although the led indicator has not been removed The wiring diagram overleaf should be followed to minimise noise on the control lines when using external inputs MUTE SAFE Not active on VCA consoles This may not be fitted to future production V
11. CA MUTE GROUP 1 ASSIGN Assigns the channel mute to VCA Mute Group 1 with led indication The channel level is now dependant on both the position of the local fader and the position of the VCA master fader Similarly for assigns 2 3 4 5 6 7 and 8 Internal links allow the MUTE GROUPS to become SCENE PRESETS that is when a MASTER is pressed all assigned channels are switched ON not muted Q2 OPERATION AND MAINTENANCE MANUAL 9601 29 EXTERNAL VCA FADER CONTROL WIRING y FADER REF 10v GROUND REMOVED LKa peo Hj CONSO TOR K FADER FADER CONNEC TOR CONNEC ONTRO Q2 OPERATION AND MAINTENANCE MANUAL 9601 ION ON SEC ON E p INPUT GAIN 303 D 15 15 MONO STEREO EFFECT RETURN MODULE As an option in place of a standard input a stereo effect return input may be fitted The effect return section may be controlled by the VCA master if VCA Mute subgrouping is fitted to the console GAIN Adjusts the gain of the effect return input section The gain is adjustable from 15dB to 15dB L CUT Cuts the signal feed to the left channel with led indication R CUT Cuts the signal feed to the right channel with led indication PHASE REVERSE Inverts the phase of the signal on the right channel input WIDTH Varies the width of the stereo image from mono through normal stereo to a wide
12. FREQUENCY RESPONSE Mic Input to Mix Output gain 55dB Line Input to Mix Output gain OdB NOISE DIN Audio Weighted Microphone Input Gain 55dB EIN Ref 200 Ohm Line Input to Mix Output Gain OdB 16 inputs routed DISTORTION Microphone Input to Mix Output 50dBu input 4dBu output Line Input to Mix Output 4dBu input 4dBu output CROSSTALK Adjacent Channel 1kHz Group to Mix 1kHz Fader Attenuation 1kHz Panpot Isolation 1kHz 86dB 40dB 20Hz 0 50dB 20kHz 0 20dB 20Hz 0 50dB 20kHz 0 20dB lt 127 5dBu lt 83dBu lt 0 005 lt 0 005 lt 100dBu lt 88dBu lt 95dBu lt 72dBu Q2 OPERATION AND MAINTENANCE MANUAL 9601 10 Q2 Power Supply Specifications AC Mains Voltage selection 110V 120V 220V 240V Power Consumption max 750VA AC Mains frequency 50Hz 60Hz Fuse Ratings 220 230 240V 6 3A 90 100 120V 10A Cooling Method Internal fan DC Power Outputs 17 Volts 7A max 17 Volts 7A max 48 Volts 0 35A max Q2 OPERATION AND MAINTENANCE MANUAL 9601 11 WIRING CONSIDERATIONS GROUNDING 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 disc
13. LO TRIM pot can be used to alter the PFL solo level although it will not of course change the level shown on the meter The external feeds to the meterbridge are permanently tied to the mix outputs of the console Q2 OPERATION AND MAINTENANCE MANUAL 9601 62 A rotary pot is used to control the monitor outputs although not directly A control voltage is derived from the pot which is fed to three VCAs on the sub board which control the monitor levels for Left Centre and Right The monitor has associated MONO DIM and ON buttons and can be selected to carry CUE TAPE L R and Centre signals If both the L R and CENTRE buttons are depressed then L CR monitoring will result If no buttons are depressed then CUE will be selected Headphone monitoring is also available and the left and right headphone feeds have the centre channel mixed in with them The headphones receive the same feed as the monitor outputs of the console SIP monitoring uses the main mix outputs of the console in order that an output solo does not cut the inputs assigned to that group and the SIP signals enter the signal chain immediately before the insert send points for the Left Centre and Right mixes A RESET button disables any active cues on the console without having to locate the soloed channel The solo function is also available for the L R and Mono outputs of the console A further section of logic is associated with the solo function and the operation is as follows
14. MAINTENANCE MANUAL 9601 12 Do not install other equipment lighting vending machines etc to the technical earth only use it for Audio Equipment If the star point is derived from mains earth however and not from a ground stake plate 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 It may be necessary to install an isolating transformer for the clean supply to ensure adequate isolation from mains borne interference The isolating transformer must be of adequate current capability and should incorporate a Faraday Shield connected to the incoming mains earth All audio connecting cables should be good quality twin screened cable Do not use single screened cable 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 which external hum fields will be induced 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 imped ance to earth However at audio frequencies the reactance of the capacitor will be sufficiently high to not cause an earth l
15. PIN ASSIGNMENTS Main Left Right and Mono Outputs Monitor Outputs Auxiliary Outputs and generator output 3 Pin XLR type Balanced Nominal Output Level 4dBu Pin 2 Signal ve Hot Pin 3 Signal ve Cold Pin 1 Ground Output Impedance lt 75 Ohm Talkback Microphone Input 3 pin XLR type Balanced Nominal Input Level 62dBu to 8dBu Pin 2 Signal ve Hot Pin 3 Signal ve Cold Pin 1 Ground Input Impedance gt 2 kOhm 48V Phantom power optional Tape Play Input 3 Pin XLR type Balanced Nominal Input Level 4dBu Pin 2 Signal ve Hot Pin 3 Signal ve Cold Pin 1 Ground Input Impedance gt 10 k hm Q2 OPERATION AND MAINTENANCE MANUAL 9601 56 VCA MASTER MODULE The effect return VCA master is only fitted to consoles with the D optional VCA Grouping inputs The effects return section may be controlled by the VCA masters INPUT GAIN 5 Pen di Adjusts the gain of the effect return input section The gain is 3593 adjustable from 15dB to 15dB L CUT Cuts the signal feed to the left channel with led indication MONO TO LAR i Ve R CUT Cuts the signal feed to the right channel with led indication PHASE REVERSE Inverts the phase of the signal on the right channel input WIDTH Varies the width of the stereo image from mono through normal stereo to a wide signal where the left and right signals appear to 305 come from outside their normal image positions v Ha
16. Q II FOH Operators Manual Klark Teknik Building Walter Nash Road Kidderminster Worcestershire DY11 7HJ Tel 44 0 1562 741515 Fax 44 0 1562 745371 Email info uk telex com Website www ddaconsoles com Q II FOH 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 GENERAL INFORMATION THE Q2 IN USE WARRANTY DIMENSIONS SPECIFICATIONS WIRING CONSIDERATIONS GROUNDING ATTENTION MODULE DESCRIPTIONS THE MATRIX SECTION THE 20DB PAD INPUT MODULE VCA INPUT MODULE STEREO EFFECT RETURN MODULE MONO SUBGROUP OUTPUT MODULE STEREO SUBGROUP OUTPUT MODULE LCR SUBGROUP OUTPUT MODULE FOLDBACK MASTER MODULE AUXILIARY MASTER MODULE STEREO MASTER MODULE MASTER CONNECTOR PANEL VCA MASTER MODULE THE AUDIO MASTER MODULE Q2 TECHNICAL DESCRIPTION THE AUXILIARY MASTER MODULE THE FOLDBACK MASTER MODULE THE INPUT MODULE THE MONO GROUP OUTPUT MODULE THE STEREO GROUP OUTPUT MODULE THE LCR GROUP OUTPUT MODULE Q2 VCA VCA MASTER MODULES Q2 OPERATION AND MAINTENANCE MANUAL 9601 Declaration of Conformity The Manufacturer of the Products covered by this Declaration is EV uno Klark Teknik Building Walter Nash Road Kidderminster Worcestershire DY11 7HJ The Directives Covered by thi
17. TENANCE MANUAL 9601 34 EFFECTS RETURN INPUT B LEFT CONNECTORS AND PIN ASSIGNMENTS LINE A 3 Pin XLR type Balanced Nominal Input Level 4dBu Pin 2 Signal ve Hot Pin 3 Signal ve Cold Pin Ground Input Impedance gt 10 kOhm LINE B 1 4 TRS Jack Socket A Gauge Balanced Nominal Input Level 4dBu Tip Signal ve Hot Ring Signal ve Cold Sleeve Ground Input Impedance gt 10 k hm Q2 OPERATION AND MAINTENANCE MANUAL 9601 7 456 3 7 2 8 1 9 o 10 8 456 2 8 o 10 MATRIX MONO SUBGROUP OUTPUT MODULE Either 8 or 16 mono subgroup modules may be fitted in Q2 If 16 are fitted routing is paired with active pan across the group buses at all times For 8 modules routing is individually selected with pan only switched in across odd and even groups as required The module comprises the group control and output lower part of module and a matrix mixer section upper part of module Each module has controls for inputs to the Matrix mixer ie they are not feeds from that group to the matrix buses but feeds from the groups etc to the matrix F B 1 3 Adjusts the level of the Foldback 1 master output or 3 fed to the Matrix bus on the module This may be used to feed a global mix set up on the F B 1 bus to any of the 8 matrix outputs F B 3 switch Selects the Foldback output 3 to the matrix instead of F B 1 F B 2 4 Adjusts the level of the Foldback 2 master output or 4 f
18. The matrix send can be taken pre or post fade and in the pre fade position it can be link programmed to be either pre or post mute The signal is then buffered and sent onto the matrix buses The matrix operates differently to previous DDA matrices and a full level signal is sent to all buses Thus the matrix pots are controlling signal coming into their module as opposed to the previous situation where the pots would control the level going to another matrix output The matrix signals are picked up level controlled and mixed together before going to the matrix ON switch In addition to the eight send signals the foldback mix left right and mix centre signals are available on the matrix Immediately after the ON switch talkback is injected although the enable switch must be operated for this to happen The signal is then balanced in an SSM2142 to become the matrix out signal Both the matrix and the group signals can be soloed and the solo enable circuits are as previously described If LCR mode is selected then the group AFL solo will be across the three buses otherwise it will be in stereo The matrix solo is across the L R buses The group cut is electronically operated through an identical circuit to that of the input module and again there is provision for the group to be muted by any of eight master mute groups Q2 OPERATION AND MAINTENANCE MANUAL 9601 76 MONO GROUP OUTPUT LINKS Link Function 1 2 Group Bus Programming KE 3 4 Matrix S
19. a four band design all bands having sweep frequency adjustment Each band consists of two dual concentric pots The upper pot is the gain adjustment the lower control being the frequency adjustment The two mid range sections each have a switch selectable Q HF Shelving section providing 15dB of gain with an adjustable frequency range of 2kHz to 20kHz HI MID Peaking section providing 15dB of gain at frequencies from 525Hz to 15kHz Q Selects the Q to be 0 9 or 1 8 The Q is 0 9 when the switch is in the down position LO MID Peaking section providing 15dB of gain at frequencies from 80Hz to 2 2kHz Q Selects the Q to be 0 9 or 1 8 The Q is 0 9 when the switch is in the down position LF Shelving section providing 15dB of gain with an adjustable frequency range of 20Hz to 500Hz EQ IN The EQ switch inserts the entire equaliser circuit into circuit When switched out the equaliser is totally bypassed keeping the signal path to a minimum The led in the switch illuminates when the EQ is in circuit The Insert point is normally located after the EQ section but a switch located on the module pcb allows the insert to be pre EQ Q2 OPERATION AND MAINTENANCE MANUAL 9601 21 278 E AUXILIARIES Q2 has eight auxiliary buses accessed on the Input module from 4 sets of dual concentric controls In addition the channel direct output may be controlled via one pot to provide extended auxiliar
20. are in use with a 4 5dB drop relative to fully clockwise or anti clockwise Setting the PAN control fully anticlockwise sends full level to the Left bus cutting the send to the Right bus fully clockwise rotation sends full level to the Right bus cutting the feed to Left L R Routes the post fade post pan channel signal to the main stereo mix bus with led indication The PAN control is automatically inserted into circuit MONO Routes the post fade post pan channel signal to the main mono mix bus with led indication PAN Switches the PAN control in circuit across odd and even group buses with led indication LCR Changes the mode of the pan pot from conventional stereo L R panning as described above to Left Centre Right mode In this mode the pan control acts across all three main buses using the mono bus as a centre bus When the pan is fully anti clockwise signal is sent only to the left bus with no signal to centre or right buses In the centre signal is sent only to the centre mono bus with no signal to left or right buses When fully clockwise signal is only sent to the right bus with no signal sent to left or centre buses If a pair of groups eg 1 and 2 is selected the pan also acts in LCR mode but without a centre output from the groups unless the LCR group modules are fitted bb OPERATION AND MAINTENANCE MANUAL 9601 24 J Oh 1 Routes the post fade post pan channel signal to output bus 1
21. ched to control the direct output which is normally post fader The VCA version of the console incorporates on off switches for the auxiliary and foldback sends which are mounted on the sub board The sub board connector is removed and replaced by links in a non VCA console INPUT MODULE LINKS Link Function 1 2 Transformer Bypass 3 4 5 External Meter Pre EQ Post EQ Dir 7 Cut Lamp 8 On Lamp 9 Cut Lamp Flash 10 Link for non VCA version 11 12 13 Internal Meter Pre EQ Post EQ Post 14 15 16 Foldback Pre Pre EQ Post EQ Post Cut 17 18 19 Auxiliary Pre Pre EQ Post EQ Post Cut 29 30 Mute Scene Factory Position Q2 OPERATION AND MAINTENANCE MANUAL 9601 75 THE MONO GROUP OUTPUT MODULE This module contains the circuit for one group output and one matrix output The signal path for the group signal is from the bus through the appropriate link depending upon which group the module is programmed to receive into the bus mixing amplifier The signal then is fed to the balanced insert send output by an SSM2142 and returned by an SSM2143 before entering the SSM2402 used for the cut function From here the signal passes through the fader which has 10dB of gain in hand followed by the fader buffer to make up the 10dB of gain The signal is then balanced in an SSM2142 to become the group output signal The group signal can be sub mixed to the main LCR bus and this can be done in stereo or full LCR if selected
22. e connector is located on the rear panel of the console The normal length of the PSU Console cables is 25 feet 8 metres The power supply requires the following Mains supplies 220 240 Volts AC 6 3 A Maximum current ratings 100 120 Volts AC 10 A Maximum current ratings and is connected to the AC Mains via standard IEC 3 pin lead The PSU has an integral low noise cooling fan and should be provided with at least 1U 1 75 of rack space above and below it WARNING ENSURE THAT THE CORRECT VOLTAGE HAS BEEN SELECTED ON THE PSU BEFORE SWITCHING ON THE UNIT The selection of the mains input voltage is made by removing the fuse holder from the rear panel of the PSU and replacing it in the correct orientation for the local voltage supply Ensure that the correct value fuse is fitted to correspond to the supply Q2 OPERATION AND MAINTENANCE MANUAL 9601 14 ATTENTION 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 correspond
23. e feed while the right feed increases until at full clockwise rotation the signal is only on the right channel Q2 OPERATION AND MAINTENANCE MANUAL 9601 4 THE Q2 IN USE Providing a hard centre image in addition to left and right speaker clusters improves localisation as has already been proven in the cinema industry Stars and soloists are typically mixed to the centre channel Back up vocals and orchestra or band may be wrapped around the vocalist in stereo or panned across the three channels In Theatrical performances LCR panning may be used to follow an actor around the stage Q2 s typical use in the theatre maybe as follows The main LCR output is used to feed the audience clusters Further flexibilty in mixing is provided if the 4 LCR sub groups are fitted as groups can be formed with all signals in place then simply fader controlled as a group to the main output Four of the auxiliary sends labelled foldback may be used to provide stage monitoring as the term foldback suggests The other four auxiliaries are then free for effects sends perhaps using the dual concentric controls as stereo pairs The matrix section has numerous uses Apart from creating foyer and backstage feeds it can be used for distributed loudspeaker arrays for SPL control further back in the house see the section on the Q2 matrix If the 02 stereo sub groups are fitted the matrix is fully stereo so that delayed arrays can be easily set up as dis
24. ed by perhaps focusing vocals to the front and mixing effects and music around the hall Q2 s matrix offers all the flexibility that you need In addition to a feed from all the group outputs each matrix output may be fed from the main stereo and mono or LCR buses and any 2 of the four foldnack mixes This latter facility is extremely useful when you consider that you can now set up one mix on a foldback bus and feed portions of that mix to any or all of the matrix outputs With fader control CUE and ON OFF facilities Q2 s matrix is peraps one of the most powerful systems available on a console Q2 OPERATION AND MAINTENANCE MANUAL 9601 18 THE 20DB PAD One trend in modern console design that DDA has chosen not to follow is the removal of the traditional 20dB pad in favour of a wide range gain control system The reason for this is mostly due to the use of microphone input transformers Their position in the circuit is always before the input amplifier Without a pad the risk of saturating the transformer with high level microphone outputs is extreme unless very large transformers are used DDA s philosophy places the 20dB pad before the transformer to eliminate the risk of transformer saturation Q2 OPERATION AND MAINTENANCE MANUAL 9601 19 INPUT MODULE The input module is essentially the same for all subgroup versions of Q2 with links selecting whether the buses feed 8 mono 8 stereo 4 LCR or 16 mono subgroups Dedica
25. ed to calibrate the Stereo Matrix level meters GROUP METER L and R Sub panel preset used to calibrate the Stereo Group level meters CUE SOLO Solo s the Stereo Matrix signal to the main monitors headphones or loudspeakers with flashing led indication See the Input Module for a functional description of the solo button FADER The 60mm fader controls the level of the Stereo Matrix output signals Q2 OPERATION AND MAINTENANCE MANUAL 9601 41 BAL Adjusts the Stereo Group signal within the main Stereo Left and Right buses The range of adjustment is 3dB SUB LCR Routes the Stereo Group signal to the main Stereo Left Right bus and or the main Mono centre buses with led indication ON The ON switch enables the group output and is indicated by an led in the switch when the output is active Internal links allow the ON switch to be configured as a group CUT MATRIX SEND PRE Allows the Stereo Group input to the Stereo Matrix to be fed pre fader rather than post fader CUE SOLO Solo s the Group signal to the main monitors headphones or loudspeakers with flashing led indication See the Input Module for a functional description of the solo button MUTE SAFE Not active on VCA consoles Prevents the Mute Group or scene preset master from muting the channel and may be used to locally override muted channels VCA MUTE GROUP 1 ASSIGN Assigns the channel mute to VCA Mute Group 1 with led indication Si
26. ed to the Matrix bus on the module F B 4 switch Selects the Foldback output 4 to the matrix instead of F B 2 L R Adjusts the level of the summed mono signal from the main stereo left and right outputs fed to the Matrix on the module MONO Adjusts the level of the main Mono centre signal from the main mono output fed to the Matrix on the module 1 Adjusts the level of the post fader Group 1 signal input to the Matrix Similarly for Controls 2 8 for Group signals 2 to 8 Q2 OPERATION AND MAINTENANCE MANUAL 9601 36 T B Enables talkback signals to be routed to the Matrix output when the communication system is used with led indication This can be used to prevent talkback signals going to unwanted destinations ON Enables the Matrix output with led indication MATRIX METER Sub panel preset used to calibrate the Matrix level meter GROUP METER Sub panel preset used to calibrate the Group level meter CUE SOLO Solo s the Matrix signal to the main monitors headphones or loudspeakers with flashing led indication See the Input Module for a functional description of the solo button FADER The 60mm fader controls the level of the Matrix output signal PAN Pans the Group signal across the main Stereo bus or if in LCR mode across the Left Right and Centre mono buses In the centre in L R mode the signals are 4 5dB below the signals when hard panned left or right PAN mode In the up position
27. end Programming 5 6 Group Transformer Balancing 7 8 Post Pre Mute Matrix Send 9 10 Matrix Transformer Balancing 11 Link for non VCA version 12 13 14 Cut On Lamp Installed link depends upon module position Factory Position Q2 OPERATION AND MAINTENANCE MANUAL 9601 THE STEREO GROUP OUTPUT MODULE The stereo module is very similar to the mono group output but of course the signal paths must be duplicated There are two group output signal paths and two matrix sends which can selected pre or post fader The matrix returns are fed to ganged pots and the matrix output is again duplicated to give a stereo output Sub grouping to the L R and Mono buses is done independently and there is a balance facility for the stereo sub signal Soloing of the group and matrix signals is possible using identical circuitry to that described previously STEREO GROUP OUTPUT LINKS Link Function 1 2 Group Bus Programming 3 4 Matrix Send Programming 7 8 Post Pre Mute Matrix Send 207 208 Post Pre Mute Matrix Send R 11 Link for non VCA version 12 13 14 Cut On Lamp 15 16 Mute Scene Installed link depends upon module position Factory Position Q2 OPERATION AND MAINTENANCE MANUAL 9601 78 THE LCR GROUP OUTPUT MODULE Three group outputs are required on this module to give the required Left Centre and Right outputs The signal path for each of these outputs is as for the mono group output The matrix
28. first applied in 1996 Signed G M Squires Authority Product Support Manager Date lst 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 measures and limitations to use are available on reguest and are also contained in product manuals Q2 OPERATION AND MAINTENANCE MANUAL 9601 3 GENERAL INFORMATION Three channel or Left Centre Right panning differs from the normal stereo panning arrangement in that where the conventional left right pan moves the signal across the stereo image LCR panning moves the mono signal across three distinct positions Using LCR panning gives a more spatial effect offers more control over vocal and effects positioning and brings theatre performances to life in a way that conventional stereo panning cannot In the LCR mode the pan pot acts as follows When panned hard left the signal is only fed to the left channel of the main output or sub group As the pan is rotated towards the centre the signal to the left decreases and the signal to the centre channel increases until at dead centre the signal only goes to the centre output At this point no signal is fed to the right channel at all LEFT CENTRE RIGHT Rotating the pan pot further to the right decreases the centr
29. g 6 a a m A M S DECODING s 13 A 3 If the width is set fully anticlockwise to MONO and the PHASE Wi 6 6 REVERSE switch is pressed the module will decode line level M S 3 Sum and Difference signals This may be the output of a 12 We 12 15 154 pre amp or recorded material HF EQ A shelving equaliser with an adjustable gain of 15dB ata frequency of 12kHz LF EQ A shelving equaliser with an adjustable gain of 15dB ata frequency of 50Hz Q2 OPERATION AND MAINTENANCE MANUAL 9601 57 F B and AUXILIARY SENDS F B 1 2 This dual concentric pair of level controls adjusts the amount of signal fed to foldback buses 1 and 2 or 3 and 4 if the switch 3 4 is pressed The upper control adjusts the level for bus 1 3 the lower for bus 2 4 Internal links allow these feeds to be selected from a mono sum of the stereo signal or left to 1 right to 2 all selectable pre or post fader by links 3 4 The switch assigns the level controls to feed foldback buses 3 4 instead of 1 2 AUX 1 2 This dual concentric pair of level controls adjusts the amount of signal fed to auxiliary buses 1 and 2 or 3 and 4 if the switch 3 4 is pressed The upper control adjusts the level for bus 1 3 the lower for bus 2 4 Internal links allow these feeds to be selected from a mono sum of the stereo signal or left to 1 right to 2 all selectable pre or post fader by links 3 4 The switch assigns the level controls to feed auxiliary buses 3 4
30. he LED to come on indicating a mute At this time Q is high causing pin 4 of IC13 to be low and therefore pin 6 of IC12 to be low If the channel is not locally cut but an external cut is received from one of the master cut switches Q will be low and the external cut signal will put a low on to pin 6 of IC13 Pin 4 will thus go high and allow the FLASH signal to blink the CUT lamp if LK9 is installed The external cut is also applied to pin 8 of IC12 causing pin 10 to go high to operate the FETs and the lamp Thus a flashing cut lamp is an indication that a remote cut has been received Q2 OPERATION AND MAINTENANCE MANUAL 9601 71 THE MIDI INTERFACE A cut is also possible from a midi muting system and this operates on the flip flop by setting Q high and Q bar low from the same signal which is inverted at TR2 The cut is a high on pin 2 of CON8 The local cut switch is connected to pin 1 of CON8 to feed a cut to the midi system FLA MIDI MUTE CONS Gi s Se j No VDD 6 a 2 f TITA 1 eet V cac 01 ON 47N CONS VDD O BRA D 2 4 D TA 3 sA E TI a z gt EOS ae 2 Size 1 p R 2 8 N LED1 R1 4 lo MH K VD A 3 AN P VDD Pi ay 2 Q VDD 209 41 Q RI zh vss K 2 R145 123 b F a aif a Me A e pt Fel 13 j hras Ts TR 4 TRZ
31. he stereo master module In the INTERLOCKED mode pressing a cue button will clear the previous cue so only one cue may ever be active at any time This prevents cue signals adding Q2 OPERATION AND MAINTENANCE MANUAL 9601 17 THE MATRIX SECTION Nowadays any console destined for theatre or similar live performance use must have a matrix This matrix takes the group signals and probably other signals and allows different sub mixes to be created for many uses Traditionally matrices have been used to provide backstage mixes dressing room and foyer feeds where some elements of the mix are not required For example you may want to send a different mix of an opera or stage show to the dressing rooms to acentuate certain points in the peformance Now with demands for sound level control increasing a matrix is mandatory for distributing sound throughout an auditorium Using the normal front of house stacks people at the rear of a hall may need the system power increased for suitable listening levels while those at the front will no doubt then be deafened The answer is to provide arrays of loudspeakers with mixes of suitably delayed signals stretching from the front of the hall to the back to provide more comfortable localised levels for better audience reception Here the matrix increases the potential of creativity of the performance as by utilising the mixing facilities of the matrix a more surround sound effect may be creat
32. igns the level controls to feed auxiliary buses 3 4 instead of 1 2 Q2 OPERATION AND MAINTENANCE MANUAL 9601 32 BAL Balances the stereo signal within the stereo bus or within pairs of groups if the MONO STEREO button is set to STEREO MONO STEREO If set to MONO a mono sum of the stereo signal is fed to any selected group If set to stereo a stereo signal is sent to pairs of groups via the BAL control left to odd right to even MONO Assigns a MONO sum of the stereo signal to the main MONO Centre bus L R Assigns the stereo signal to the main STEREO L R bus 1 Assigns signal to group 1 either as a mono sum or the left channel depending on the setting of the mono stereo switch Similarly for groups 2 8 Q2 OPERATION AND MAINTENANCE MANUAL 9601 33 SAFEL Ox AC or cm DI w SAFE Not active on VCA modules Deselects the return from the MUTE Group system without affecting the mute group assignments Useful to locally protect signals or manually override grouped MUTE ON conditions VCA MUTE GROUP 1 Assigns the channel to VCA MUTE Group 1 Similarly for VCA MUTE Groups 2 through 8 If the VCA option is fitted then the post fader level will depend upon the local fader and the VCA group master fader CUE Assigns the stereo signal to the CUE system with flashing led indication when enabled ON Enables the Effect Return signal path FADER Controls the post fader signal level Q2 OPERATION AND MAIN
33. ing 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 Q2 OPERATION AND MAINTENANCE MANUAL 9601 15 MODULE DESCRIPTIONS THE CUE SYSTEM SOLO MODE CUE PRIORITY CUE BUTTON ACTION MOMENTARY OR LATCHING Before describing the module functions it is worth looking at some of the facilities in some depth which would otherwise be too long to describe within the module texts Q2 s cue system smart cue is as flexible as you want it to be It can be operated in several modes the simplest of which is of course a regular PFL solo system The three modes of cue listening are PFL pre fade AFL after fade and SIP solo in place The overall level of the cue signal fed to the monitors is adjustable on the stereo master module so PFL signals will not present high level signals to the monitor outputs The solo in place mode is different from the normal recording SIP or other SIP modes in that cueinga channel or group will not actually mute all the other channels It would would be useless if by soloing a group you cut the inputs to that group Instead in SIP mode any group cue pressed will override and replace whatever signal is present on the main output until the cue is released when the original signal is returned No channels are muted so all active parts of the group remain intact As this functi
34. inks on the module pcb allow the pre fader feed to be pre or post EQ paired with Aux 2 AUX 2 Lower control Controls the level of the channel signal fed to the Aux 2 bus This signal is normally post fader unless the PRE button just below is depressed PRE Selects the signal feed for Auxes 1 and 2 to be pre fader rather than post fader AUX 3 Upper control Controls the level of the channel signal fed to the Aux 3 bus This signal is normally post fader unless the PRE button just below is depressed Internal links on the module pcb allow the pre fader feed to be pre or post EQ paired with Aux 4 AUX 4 Lower control Controls the level of the channel signal fed to the Aux 4 bus This signal is normally post fader unless the PRE button just below is depressed PRE Selects the signal feed for Auxes 3 and 4 to be pre fader rather than post fader DIR Re routes the signal on the Aux 4 control to feed the Channel Direct output The signal no longer feeds the Aux 4 bus and can be used either as an additional single effects send or as a feed to a multitrack for example Note Dir and Pre are local to the module they do not affect the signal flow on any other module than the one on which they are located Q2 OPERATION AND MAINTENANCE MANUAL 9601 23 ROUTING AND STATUS PAN In normal mode and with the PAN set to centre equal levels are sent to both sides of the stereo mix or to ODD and EVEN groups that
35. instead of 1 2 Q2 OPERATION AND MAINTENANCE MANUAL 9601 58 BAL Balances the stereo signal within the stereo bus or within pairs of groups if the MONO STEREO button is set to STEREO MONO STEREO If set to MONO a mono sum of the stereo signal is fed to any selected group If set to stereo a stereo signal is sent to pairs of groups via the BAL control left to odd right to even groups MONO Assigns a MONO sum of the stereo signal to the main MONO Centre bus L R Assigns the stereo signal to the main STEREO L R bus 1 Assigns signal to group 1 either as a mono sum or the left channel depending on the setting of the mono stereo switch Similarly for groups 2 8 ON Enables the Effect Return signal path SAFE Deselects the return from the VCA MUTE Group system without affecting the mute group assignments Useful to locally protect signals or manually override grouped MUTE ON conditions VCA MUTE GROUP 1 Assigns the channel to VCA MUTE Group 1 Similarly for VCA MUTE Groups 2 through 8 CUE Assigns the stereo signal to the CUE system with flashing led indication when enabled FADER Controls the level of the EFFECT RETURN section of the module Q2 OPERATION AND MAINTENANCE MANUAL 9601 59 VCA MASTER SECTION CUT 1 Mutes all channels assigned to VCA MUTE Group 1 Similarly for for CUT 2 through 8 VCA 1 Switches in the VCA master fader to control VCA Mute Group 1 If the VCA is not switched in
36. level will depend upon the position of the channel fader and the VCA group master Internal links allow the MUTE GROUPS to become SCENE PRESETS that is when a MASTER is pressed all assigned channels are switched ON not muted Q2 OPERATION AND MAINTENANCE MANUAL 9601 38 CONNECTORS AND PIN ASSIGNMENTS Group Ouptut 3 Pin XLR type Balanced 3 GROUP Nominal Output Level 4dBu ate Je Pin 2 Signal ve Hot Pin 3 Signal ve Cold Pin 1 Ground Output Impedance lt 75 Ohm 1 MATRIX Matrix Ouptut 3 Pin XLR type Balanced Nominal Output Level 4dBu Pin 2 Signal ve Hot Pin 3 Signal ve Cold Pin 1 Ground Output Impedance lt 75 Ohm Insert Send 1 4 TRS Jack socket A Gauge Balanced Nominal Output level 4dBu Tip Signal ve Hot Ring Signal ve Cold Sleeve Ground Output Impedance lt 75 Ohm Insert Return 1 4 TRS Jack Socket A Gauge Balanced Nominal Input Level 4dBu Tip Signal ve Hot Ring Signal ve Cold Sleeve Ground Input Impedance gt 10 kOhm Q2 OPERATION AND MAINTENANCE MANUAL 9601 STEREO SUBGROUP OUTPUT MODULE Eight stereo subgroup modules may be fitted in Q2 and routing is individually selected The module comprises the Stereo Group control and output lower part of module and a Stereo Matrix mixer section upper part of module Each module has controls for inputs to the Stereo Matrix mixer ie they are not feeds from that
37. milarly for assigns 2 3 4 5 6 7 and 8 If the VCA option is fitted then the channel level will depend upon the position of the channel fader and the VCA group master Internal links allow the MUTE GROUPS to become SCENE PRESETS that is when a MASTER is pressed all assigned channels are switched ON not muted Q2 OPERATION AND MAINTENANCE MANUAL 9601 42 CONNECTORS AND PIN ASSIGNMENTS Group Output 3 Pin XLR type Balanced Nominal Output Level 4dBu Pin 2 Signal ve Hot Pin 3 Signal ve Cold Pin Ground Output Impedance lt 75 Ohm Matrix Output 3 Pin XLR type Balanced Nominal Output Level 4dBu Pin 2 Signal ve Hot Pin 3 Signal ve Cold Pin 1 Ground Output Impedance lt 75 Ohm Insert Send 1 4 TRS Jack socket A Gauge Balanced Nominal Output level 4dBu Tip Signal ve Hot Ring Signal ve Cold Sleeve Ground Output Impedance lt 75 Ohm Insert Return 1 4 TRS Jack Socket A Gauge Balanced Nominal Input Level 4dBu Tip Signal ve Hot Ring Signal ve Cold Sleeve Ground Input Impedance gt 10 k hm Q2 OPERATION AND MAINTENANCE MANUAL 9601 AMDLI 5 04 tal 2 MANY A 0 1a 2 a ww a O gt ti v a Nw m p o e So a a vi o a LCR SUBGROUP OUTPUT MODULE The LCR Subgroup Output module has three outputs for the left centre and right outputs from each group It ma
38. n again take effect When the RESET line goes high it will go to almost the audio positive rail This excess voltage is removed by zener diode D50 which is used to block the output of IC47B which will be at 5V When the RESET line goes low then IC48A will be reset cancelling any solo Q2 OPERATION AND MAINTENANCE MANUAL 9601 69 Q2 PANNING The Q2 console can exploit either L R panning or L C R panning selected by a switch In either case the same components are employed as follows The pan pot VR7 is centre tapped and under normal operation the input signal is fed to the top of the pot the hot end This is connected to the centre tap by a 10k resistor to give the appropriate law and the wiper signals are fed to the pan buffer IC9 These signals leave the module as LSUB or RSUB to give normal stereo panning The MIXC output is directly connected to the mono input of the pan pot The CGROUP output is grounded If the switch is depressed to give L C R panning then the centre taps of the pots are grounded meaning that the pots will only work across half of their range which is the required condition The signal can now leave as LSUB or RSUB or indeed PANL and PANR if link 22 is installed in an LCR console The output of the pan buffers are combined by IC10A along with an out of phase feed of the input signal to give a centre signal which is fed out as CGROUP or MIXC A signal panned fully left will appear at the LEFT output only a CENTRE
39. on could be considered as dangerous in a performance situation the SIP mode switch is located at the top of the module away from all the other cue mode controls Q2 s smartcue system incorporates a cue priority function Two leds on the stereo master module indicate whether an INPUT CUE or an OUTPUT CUE is active If an output cue is active pressing an input cue will override and replace the output cue until released when the output cue signal will be returned This is an important facility in live sound production The action of the cue buttons is functional in two ways If the button is pressed quickly normally the channel latches into cue mode with a flashing led and remains in cue mode until the button is pressed again This is the latching mode and is the normal method of cue operation Q2 OPERATION AND MAINTENANCE MANUAL 9601 16 CUE INTERLOCK MODE MASTER CUE RESET If the cue button is held depressed for at least one second the cue will become momentary and only active until the cue button is then released This allows you to listen to a signal for a short period of time and only have to press the button once A further method of operation involves a choice of additive or exclusive cues In normal mode the cues are additive That is any cue button pressed adds its signal to any cues already pressed so any number of cues may be active at one time To clear all the cues completely press the CUE RESET button on t
40. onnect the mains earth wire from each piece of equip ment as this could create a hazardous situation If in doubt consult a competent engineer and your local electricity supply company to ensure that safety regulations are not infringed or negated The console metalwork MUST ALWAYS be connected to the Mains earth via the PSU lead However the user has a choice as regards the Audio OV The Audio OV should be taken from the Studio earthing System which should take the form of a star wired system Decide ona central point for the main earth system and starfeed 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 but preferably should be connected to a totally separate technical earth if local electrical regulations permit This should take the form of a large copper plate or stake buried as deeply as practical into the ground a 1 metre 39 cop per stake hammered fully into the ground would be suitable This should then be fed to the studio star system via heavy gauge low impedance cable with adequate precautions being taken to prevent excessive corrosion of the cable earth stake Q2 OPERATION AND
41. oop 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 elec tronically balanced input In these cases the wires being screened are referenced to the destination earth 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 Q2 OPERATION AND MAINTENANCE MANUAL 9601 13 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 rectify a problematical installation after everything has been connected due to interaction between the various earth loops The Console is supplied with 1 power supply unit 3U high 5 25 19 rack mounting The PSU supplies the console with 18V 18V 48V phantom and Audio Ground OV Connection between supplies and console is a cable terminated at both ends by polarised Harting multiway connectors At the console th
42. ost the insert point and from here the signal enters the cut SSM followed by the fader the fader buffer stage and the pan circuit before going to the routing switches A VCA version of the module will allow for VCA level control and VCA muting THE RESET CIRCUIT A reset for the module logic is given by the RC network formed by C41 and R142 On power up C41 will charge through R142 causing TRI to switch on This applies a low to the SET input of the flip flop and a high to the reset input causing Q bar to go high giving a channel ON condition The RESET line is also fed to the SOLO enable circuit THE SOLO SYSTEM The Q2 solo system is a little more comprehensive than in other consoles and there are some novel features about the way in which it operates The SOLO button can be pressed fleetingly and the solo will latch until the button is pressed for a second time If the button is depressed for a longer period then the solo will not latch but will release as the solo button is released There is also a facility for all solos to be cleared by the operation of a master button on the console The heart of the system is IC11 a dual D Type flip flop Normally the reset pin will be held low and under this condition the state of the Q output will toggle with each operation of the solo switch Q2 OPERATION AND MAINTENANCE MANUAL 9601 68 If the solo
43. ot 20182 BC182 CD4093 OK 47 f vs Q2 OPERATION AND MAINTENANCE MANUAL 9601 72 Q2 ROUTING There are 20 buses available in the Q2 console giving rise to several possibilities An input module can be configured to route to 8 mono groups 16 mono groups with paired routing 8 stereo sub groups or 4 LCR groups The following tables can be used to check which links and resistors should be installed for the different configurations INPUT MODULE RESISTORS Resistor Standard LCR Stereo Mono 16 94 98 KS 102 2 189 e 227 91 228 95 229 99 230 186 KOK OK OK OK Q2 OPERATION AND MAINTENANCE MANUAL 9601 73 INPUT MODULE ROUTING LINKS LK Mono Stereo LCR 6 20 21 22 23 24 25 26 27 28 31 32 ok ok 33 34 ok ok 35 x 36 ok ok 37 38 ok ok Ee SE 3 E THE LEVEL METER The peak LED operates independently from the remainder of the meter and is wired to three points as follows Pre EQ Post EQ Post fader Thus a high level on any of the three points may bring the peak LED on The main meter can be wired to any one of the three points to indicate the desired level and is normally linked to the pre equaliser signal Q2 OPERATION AND MAINTENANCE MANUAL 9601 74 FOLDBACK and AUXILIARIES The Foldbacks and Auxiliaries can be switched pre or post fader In the pre fade position the signal can be sourced pre or post the equaliser or post cut switch Auxiliary 4 can be swit
44. ot approved by DDA iii Modifications made by non authorised persons or by using non recommended parts or incorrectly made In no circumstances shall DDA be liable for any indirect or consequential costs damages or losses including loss of business profits operating time or otherwise arising out of the use or inability to use the product whether or not the likelihood of damage was advised to DDA or its distributor Fuses and filament lamps are specifically excluded from the warranty This notice does not affect your statutory rights Q2 OPERATION AND MAINTENANCE MANUAL 9601 8 DIMENSIONS Q2 Dimensions 24 Input Frame Width Depth Height 32 Input Frame Width Depth Height 40 Input Frame Width Depth Height 48 Input Frame Width Depth Height Floorstand optional 1255mm 49 4 810mm 31 9 368mm 14 5 1505mm 59 25 810mm 31 9 368mm 14 5 1755mm 69 1 810mm 31 9 368mm 14 5 2005mm 78 9 810mm 31 9 368mm 14 5 Height to underneath of console 700mm 27 5 Q2 Power Supply Dimensions Height Depth Width Nett Weight unpacked 134mm 5 25 3U rack mounting 265mm 10 5 Front panel 483mm 19 Housing 438mm 17 25 7 8 Kg 17 2 Ibs Q2 OPERATION AND MAINTENANCE MANUAL 9601 9 SPECIFICATIONS Note All specifications relate to dBu ie OdBu 0 775V RMS MAXIMUM GAIN Mic Input to Mix Output Line Input to Mix Output
45. output is mono and is fed from a mix of the LCR signals The matrix returns are stereo capable and again foldback and the mix can be merged onto the matrix send LCR GROUP OUTPUT LINKS Link Function 1 2 17 Group Bus Programming 3 4 Matrix Send Programming 7 8 Post Pre Mute Matrix Send L 207 208 Post Pre Mute Matrix Send R 307 308 Post Pre Mute Matrix Send C 11 Link for non VCA version 12 13 14 Cut On Lamp 15 16 Mute Scene Installed link depends upon module position Factory Position Q2 OPERATION AND MAINTENANCE MANUAL 9601 79 02 VCA The modules are similar to the normal Input and Output modules but with different sub boards The VCA sub board carries the VCA and its associated control voltage circuits along with a mute switch interface for the auxiliaries and foldbacks INPUT MODULE An SSM2018 VCA is used and audio is connected to this from the main board via CON4 The control voltage is fed from IC3B and this voltage can be a sum of the channel fader the VCA group master fader and an external fader input The channel fader is an audio fader and consequently it must be processed via a log amp before it can be used to control the VCA ICIA buffers the fader voltage while TR1 and IC2 form the log amp The output of the log amp is linked via LK2 to IC3B the control voltage buffer If a VCA taper fader is used then LK2 should be removed and LK1 installed This takes the buffered fader voltage s
46. panned signal will appear on the centre output only and of course a RIGHT panned signal will appear on the right output only A signal panned for example between left and centre will have no output on the right output whereas it would if normal stereo panning was employed Q2 OPERATION AND MAINTENANCE MANUAL 9601 70 ON CUT CIRCUIT The ON circuit of an input module is based around IC11 a dual positive edge triggered S R Flip Flop Under static conditions C40 will charge through R140 holding the clock input low Pressing the ON switch applies Vdd to the clock input causing pin 2 to be clocked through to pin 1 reversing the states of Q and Q bar For the channel to be on Q bar should be high Assuming that the channel is SAFE at the moment then pin 10 of IC12 will go low causing pin 11 to go high Following this through the ON LAMP link TR3 will be switched off by this high causing TRS to be off which means that the LED will be ON An anti phase feed is taken to the series and shunt FETs such that in the ON condition the series FET receives a high while the shunt FET receives a low An alternative is for the lamp to indicate the CUT condition A local channel CUT will set Q bar low and thus pin 10 of C12 will be high This will cross the cut lamp link and switch TR3 off causing t
47. plifier and immediately after this the LMIXPRE signal is taken to other parts of the circuit The signal then passes through an SSM2404 switch which operates as a changeover to allow SIP signals onto the signal path in place of the mix signal Following this an SSM2142 is used to send a balanced insert send signal to the send jack which is normalled to the return jack From here the signal passes through an SSM2143 balanced to unbalanced stage to the main fader one each for Left Centre and Right A fader buffer stage follows after which the signal is fed up to the sub board to the main mix outputs of the console The signal is known as LMIX at this point A further buffer stage follows and the signal is then known as LEFTMIX which goes to the matrix link connector The MIXL signal in addition to going to the sub board connects to the PRE switch which allows either a mix pre or post fade signal to be selected as the source for the centre mix when mix left and right are assigned to it The combined signal is fed onto the CMIX bus The Left Right and Centre PRE signal derived immediately after the mix amplifiers is used for SOLO and PFL and is fed via SSM2404s onto the solo buses A switch selects PFL or AFL operation while a further switch located towards the top of the module is used to select SIP operation The output of the PFL AFL switch feeds the AFL meters which are mounted on the module before entering the monitoring system via an SSM2404 A SO
48. r loudspeakers with flashing led indication See the Input Module for a functional description of the solo button Foldbacks 2 4 are identical to Foldback 1 above Q2 OPERATION AND MAINTENANCE MANUAL 9601 48 MAS MUT TER E SCENE AUXILIARY MASTER MODULE AUX 1 LEVEL Adjusts the level of the Auxiliary 1 Master output signal ON Enables the Auxiliary 1 Master output signal with led indication CUE SOLO Solo s the Auxiliary signal to the main monitors headphones or loudspeakers with flashing led indication See the Input Module for a functional description of the solo button Auxiliaries 2 4 are identical to Auxiliary 1 above MUTE GROUP MASTER 1 When pressed mutes all channels and outputs assigned to MUTE GROUP 1 MASTER MUTES 2 8 operate in a similar fashion for MUTE GROUPS 2 8 HEADPHONES HEADSET OUTPUTS Two pairs of headphones impedance 200 600 Ohms may be plugged in to the module A Clearcom type headset may also be connected complete with boom microphone on a 4 pin XLR connector HEADPHONES LEVEL Adjusts the level of the monitor signal in the headphone or headset independently of the main monitor level control ON Switches on the headphone headset outputs Q2 OPERATION AND MAINTENANCE MANUAL 9601 49 STEREO MASTER MODULE SOLO METER Indicates the level of the Solo signal in stereo PFL METER Indicates the level of the PFL signal METER CALIBRATIONS Sub panel presets to calib
49. r will not operate and the output will remain low When a second solo is received then pin 1 of 1C44 will rise higher in voltage causing pin 7 of IC45 to rise which in turn will cause the voltage comparator to operate giving a reset via TR9 Of course solos can still be cancelled on the modules on which they are active The same is true for output solos which enter via IC45 and are mixed with the input solos before reaching the voltage comparator A reset can thus be generated by requesting another solo or by operating the master reset The solo circuits on the input and output modules are a little complex and will be explained in the relevant sections The second main board is the COMMS board and as the name suggests this board handles talkback and related functions The Q2 is fitted with a CLEARCOM communication interface which is a three wire system carrying DC signalling and two way audio The PFL meter is located on this board along with the external meter drives and their associated trimmers The oscillator can generate either 1kHz or pink noise whose level can be controlled by a pot The talkback and oscillator can be routed to foldback auxiliaries groups matrix L R mix and Mono outputs To talk to the matrix a further switch must be pressed on the required output module Q2 OPERATION AND MAINTENANCE MANUAL 9601 64 The talkback microphone amplifier is adjustable in level from a front panel control and can be routed to the same des
50. rate all module and meterbridge master meters PSU INDICATOR LEDs Three led s which indicate all DC voltages are present CUE MODE SIP Selects the CUE mode to be SIP Solo in Place This mode does not mute inputs when a channel or output is solo ed The main output signal is replaced by the solo ed signal until the cue solo is cleared when the original signal is returned to the main outputs EXTERNAL TAPE INPUT An external input is provided for use as interval playback or effects input L R Assigns the Tape input to the main Stereo Left and Right Outputs MONO Assigns the Tape input to the main Mono Centre Output TAPE PLAY LEVEL Adjusts the level of the Tape Input Q2 OPERATION AND MAINTENANCE MANUAL 9601 50 INTERNAL SINEWAVE NOISE GENERATOR Q2 features an integral generator capable of producing a 1kHz sinewave or pink noise for system testing and alignment PINK 1kHz Selects the type of output from the generator In the up position the generator produces PINK noise in the down position a 1kHz sinewave tone ON Enables the generator with led indication OSC Adjusts the level of the generator output GENERATOR TALKBACK ASSIGN MATRIX Both the internal generator and talkback system share a matrix of assign switches to all outputs F B 1 2 3 4 Assigns the generator and or talkback to Foldback buses 1 and 2 and 3 and 4 respectively AUX 1 2 3 4 Assigns the generator and or talkback
51. released See THE CUE SOLO SYSTEM on page 16 for full functional details FADER The fader is the main signal level control for the channel and is a long throw type which gives smooth control of the channel level SAFE Deselects the return from the VCA MUTE Group system without affecting the mute group assignments Useful to locally protect signals or manually override grouped MUTE ON conditions MUTE GROUP 1 Assigns the channel to MUTE Group 1 Similarly for MUTE Groups 2 through 8 Q2 OPERATION AND MAINTENANCE MANUAL 9601 26 r k CONNECTORS AND PIN ASSIGNMENTS MIC INPUT XLR type 3 pin connectors Balanced Nominal level 56dBu to 8dBu Pin Ground Pin 2 Signal ve hot Pin 3 Signal ve cold Input impedance gt 2k LINE INPUT 1 4 TRS Jack Socket A Guage Balanced Nominal Input Level 4dBu Tip Signal ve Hot Ring Signal ve Cold Sleeve Ground Input Impedance gt 10 kOhm INSERT SEND 1 4 TRS Jack socket A Gauge Balanced Nominal Output level 4dBu Tip Signal ve Hot Ring Signal ve Cold Sleeve Ground Output Impedance lt 75 Ohm INSERT RETURN 1 4 TRS Jack Socket A Gauge Balanced Nominal Input Level 4dBu Tip Signal ve Hot Ring Signal ve Cold Sleeve Ground Input Impedance gt 10 kOhm DIRECT OUTPUT 1 4 TRS Jack socket A Gauge Balanced Nominal Output level 4dBu Tip Signal ve Hot Ring Signal
52. s 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 Q2 VCA Audio Mixing Console Q2 Monitor Meterbridge Audio Mixing Console QMR Meterbridge Audio 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
53. signal where the left and right signals appear to come from outside their normal image positions M S DECODING If the width is set fully anticlockwise to MONO and the PHASE REVERSE switch is pressed the module will decode line level M S Sum and Difference signals This may be the output of a pre amp or recorded material Q2 OPERATION AND MAINTENANCE MANUAL 9601 31 HF EQ A shelving equaliser with an adjustable gain of 15dB ata frequency of 12kHz LF EQ A shelving equaliser with an adjustable gain of 15dB ata frequency of 50Hz F B and AUXILIARY SENDS F B 1 2 This dual concentric pair of level controls adjusts the amount of signal fed to foldback buses and 2 or 3 and 4 if the switch 3 4 is pressed The upper control adjusts the level for bus 1 3 the lower for bus 2 4 Internal links allow these feeds to be selected from a mono sum of the stereo signal or left to 1 right to 2 all selectable pre or post fader by links 3 4 The switch assigns the level controls to feed foldback buses 3 4 instead of 1 2 AUX 1 2 This dual concentric pair of level controls adjusts the amount of signal fed to auxiliary buses 1 and 2 or 3 and 4 if the switch 3 4 is pressed The upper control adjusts the level for bus 1 3 the lower for bus 2 4 Internal links allow these feeds to be selected from a mono sum of the stereo signal or left to 1 right to 2 all selectable pre or post fader by links 3 4 The switch ass
54. ssed TRIM Adjusts the level of the Cue Solo signal most useful in the PFL mode CUE INTLK Interlock mode selection In normal mode Cues are additive That is any number of Cue buttons may be pressed and the signals will be added In INTERLOCK mode only one Cue may be active at any time so pressing a Cue will automatically cancel the previously selected Cue CUE I P Indicates that an input CUE is pressed Inputs take priority over outputs in normal mode so pressing an input CUE will suspend an output CUE until the input is released CUE O P Indicates that an output CUE is pressed This led will extinguish if an input CUE is pressed while an output CUE is already active CUE RESET Clears all pressed CUE buttons Q2 OPERATION AND MAINTENANCE MANUAL 9601 53 TALKBACK SYSTEM In addition to the normal talkback microphone input Q2 includes a Clearcom type communications interface S TONE Sub panel preset for adjusting the sidetone of the Clearcom compatible interface Sidetone is the level of your own voice that you will hear in the headphones when speaking into the communications microphone Some sidetone is usually preferred as it gives confidence that the system is working T B LEVEL Adjusts the level of the talkback microphone system COMMS ON Enables the communication system CALL The led in the switch illuminates when the console is being called Alternatively pressing CALL sends out a call signal to the Mas
55. switch is held down then C43 will charge through D13 and R155 causing pin 1 of IC12 to go high Pin 2 is already high as the flip flop has operated to give a solo and thus pin 3 of IC12 will go low This low is applied to pin 2 of IC13 and when the solo button is released pin 1 will also go low Pin 3 of IC13 then goes high causing the flip flop to be reset thus cancelling the solo TR6 is also switched on to discharge C43 The output of IC12 will then revert to a high state causing the reset to go low and allow normal operation of the flip flop A RESET signal from the master module will be received by pin 2 of IC13 and will cause pin 3 to go high since pin 1 will already be low again giving a reset and cancelling any solo Another version of the above circuit exists based around 4001 OR gates although the principle behind it is exactly the same The example shown is an output solo and in order for the input priority system to work then an extra gate is used IC47D When a solo is requested audio is allowed onto all four solo buses with selection being made on the master module depending upon the selected solo mode The RESET line from the master module is in fact tri state and in the high condition it is used to pull pin 11 of IC47D low cancelling the solo This only occurs when input priority mode is selected and when an input solo is called for The RESET does not reset the output solo latch so that when cancelled the previous output solo ca
56. ted LCR input modules have 4 routing buttons marked A B C and D instead of buttons 1 8 MTR This sub panel preset is for calibration of the external meter output of the module 48V Provides phantom power for a condenser microphone or DI box Optional balancing transformers may be fitted on the Mic input 20dB PAD This inserts a 20dB attenuator in circuit with the Mic input It may be used when high output microphones are employed or for the use of the Mic input for Line level signals GAIN The gain control is a wide range rotary potentiometer and is active on both Mic and Line Inputs On Mic the gain can be adjusted from 12 to 66dB For Line inputs the adjustment is from 10 to 20dB LINE The LINE switch selects the signal on the line input socket to feed the channel path when it is down In this case the Mic signal is disconnected The led illuminates when Line is selected PHASE The PHASE REVERSE switch inverts the phase of the selected input to allow compensation for different wiring standards FILTER The Filter switch inserts a tuneable highpass filter with a roll off of 12dB per octave into circuit after the input amplifier This may be used to eliminate unwanted low frequency noises such as rumble or camera buzz FILTER FREQUENCY CONTROL The frequency range of the filter is continuously variable between 20Hz to 500Hz Q2 OPERATION AND MAINTENANCE MANUAL 9601 20 EQUALISER The Q2 Equaliser is
57. ter TB Pressing TB Talkback routes the talkback signal to all assigned outputs Q2 OPERATION AND MAINTENANCE MANUAL 9601 54 MASTER OUTPUT CONTROL PRE Allows the signal feed from the main Left Right outputs to the Mono Centre output to be pre fader rather than post fader L R TO MONO Assigns the post fader Left Right Output to the main Mono Centre output L R CUE SOLO Solo s the main Left Right output to the main monitors headphones or loudspeakers with flashing led indication MONO CUE SOLO Solo s the main Mono Centre output to the main monitors headphones or loudspeakers with flashing led indication FADERS Three faders control the output level of the main Left Right and Centre mono signals The user may determine the configuration of the faders to be L C R or L R C Q2 OPERATION AND MAINTENANCE MANUAL 9601 55 MASTER CONNECTOR PANEL pi i T Idi Ny vl s f F a A M a j k la Taar E mp IM SE as 7 i i F T 7 Mix Insert Send 1 4 TRS Jack socket A Gauge Balanced Nominal Output level 4dBu Tip Signal ve Hot Ring Signal ve Cold Sleeve Ground Output Impedance lt 75 Ohm Mix Insert Return 1 4 TRS Jack Socket A Gauge Balanced Nominal Input Level 4dBu Tip Signal ve Hot Ring Signal ve Cold Sleeve Ground Input Impedance gt 10 kOhm CONNECTORS AND
58. the ICs is fed via an enable switch to the VCA group buses from where it will be received by modules assigned to that VCA bus The VCA group cut switch is a two pole switch One pole is used to illuminate the switch LED and the other switches the 5V reference to the VCA buses to give a mute The mute switch feeds the buses after the VCA enable switch so that it can be used even if VCA fader control is not selected The remainder of the module is taken up by a stereo effect return It is possible to select between input A and input B by a switch the output of which goes to ICIA and 2A the balanced input stages Following the left side only the signal then goes to a gain trim stage formed by IC1B and then through the LEFT CUT switch A width control is next formed by ICs 4A and 5A This stage may be bypassed when not in use The left and right signals are combined in this stage to give an image which can be reduced from full stereo to mono and expanded again into stereo but with the left and right channels reversed A phase reverse circuit formed by IC3A operates on the right signal only and again is bypassed when not in use IC4B forms a simple 2 band equaliser for the left signal which is then sent to the fader and buffered by IC6B on its return A feed of the pre fade signal is sent to IC18 an SSM2402 The left and right pre fader signals both use this chip as a mute IC The left and right signals are also combined to give a mono pre fader
59. the pan mode is conventional Stereo L R panning In the down position the group is panned across the three main outputs in Left Centre Right mode When the pan is fully anti clockwise signal is sent only to the left bus with no signal to centre or right buses In the centre signal is sent only to the centre mono bus with no signal to left or right buses When fully clockwise signal is only sent to the right bus with no signal sent to left or centre buses Q2 OPERATION AND MAINTENANCE MANUAL 9601 37 SUB LCR Routes the group signal to the main Stereo Left Right and main Mono centre buses with led indication ON The ON switch enables the group output and is indicated by an led in the switch when the output is active Internal links allow the ON switch to be configured as a group CUT MATRIX SEND PRE Allows the Group input to the Matrix to be fed pre fader rather than post fader CUE SOLO Solo s the Group signal to the main monitors headphones or loudspeakers with flashing led indication See the Input Module for a functional description of the solo button MUTE SAFE Not active in VCA consoles Prevents the Mute Group or scene preset master from muting the channel and may be used to locally override muted channels VCA MUTE GROUP 1 ASSIGN Assigns the channel mute to VCA Mute Group 1 with led indication Similarly for assigns 2 3 4 5 6 7 and 8 If the VCA option is fitted then the channel
60. tinations as the oscillator in addition to the CLEARCOM interface Incoming communication from the CLEARCOM interface can be routed to the monitor system by use of the COMMS ON key A SIDETONE trimmer allows the level of sidetone to be adjusted This is the amount of your voice that you will then hear in the headphones when using the CLEARCOM system IC6A is used to amplify incoming communications and to reject outgoing talkback which travels on the same wire as the incoming talkback PR6 alters the rejection and hence the sidetone can be increased or decreased When talkback is used a DIM command is sent to the main board Talkback audio is also incoming from the headset and this is fed to the CLEARCOM interface together with any audio from the console talkback microphone The COMMS ON switch has several functions as follows To allow incoming talkback onto the monitor system by operating an electronic switch and passing audio over to the main board Allowing either the talkback microphone or the output of the CLEARCOM system to go to talkback routing Routing the talkback microphone to the CLEARCOM system Putting a call out on the CLEARCOM system Also located on the COMMS board are the FLASH oscillator for flashing lamps and the MONO solo switch circuit Q2 OPERATION AND MAINTENANCE MANUAL 9601 65 THE AUXILIARY MASTER MODULE This board contains the master sections for the auxiliary outputs of the console in addition to headphone
61. tinct and controllable stereo pairs down each side of the auditorium Q2 OPERATION AND MAINTENANCE MANUAL 9601 5 Consultants and contractors will be pleased to note that Q2 has balanced inputs and outputs throughout including inserts In addition all inputs and outputs with the obvious exception of the mic input operate at a nominal level of 4dBu This alone means no catering for special levels on inserts no compensating for unbalanced insert sends which combine with balanced returns System connection and signal flow is therefore not console dependant LEFT CENTRE RIGHT F B 4 EFFECTS Q2 MATRIX OUTPUTS 8 Q2 OPERATION AND MAINTENANCE MANUAL 9601 6 WARRANTY If within a 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 re place the defective components Any components replaced will become the property of DDA 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
62. traight to the control voltage buffer IC3B The external fader voltage is received at CON2 and buffered by IC1B which feeds a virtual earth summing point The VCA group control voltage comes from CON12 and is summed with the external fader voltage at this point before going to the control voltage buffer IC3B LK5 should be normally be installed to allow the VCA group control voltage to operate The output of the summing amplifier IC3A is also fed to IC5 which is used as a comparator If LK6 is installed then when the comparator detects that the control voltage is such that the channel is closed a mute signal will be sent to the mute circuit on the main circuit board ICs 7 and 8 form a noise gate interface using the audio sent to the VCA which if used would be sent to a noise gate processor via a ground sensing output LED4 would indicate the gate functioning by looking at the return signal from the noise gate processor and the return signal would close the VCA Q2 OPERATION AND MAINTENANCE MANUAL 9601 80 The odd numbered group routing switches are mounted on the sub board along with the direct switch Switches for enabling Foldbacks 1 2 3 4 and Auxiliaries 1 2 are also mounted on the sub board LK3 is normally installed but if removed and LK4 installed then auxiliary 3 is routed through the direct switch This gives the option of having no direct switch but an auxiliary 3 4 enable switch is created INPUT SUB BOARD LINKS LK Function
63. used with led indication This can be used to prevent talkback signals going to unwanted destinations ON Enables the Matrix output with led indication MATRIX METER Sub panel preset used to calibrate the Matrix level meter GROUP METERS L C R Sub panel presets used to calibrate the LCR Group level meters CUE SOLO Solo s the Matrix signal to the main monitors headphones or loudspeakers with flashing led indication See the Input Module for a functional description of the solo button FADER The 60mm fader controls the level of the Matrix output signal SUB LCR Routes the group signal to the main LCR Stereo Left Right and Centre mono buses with led indication ON The ON switch enables the group output and is indicated by an led in the switch when the output is active Internal links allow the ON switch to be configured as a group CUT MATRIX SEND PRE Allows the Group input to the Matrix to be fed pre fader rather than post fader Q2 OPERATION AND MAINTENANCE MANUAL 9601 45 CUE SOLO Solo s the Group signal to the main monitors headphones or loudspeakers with flashing led indication See the Input Module for a functional description of the solo button MUTE SAFE Not active in VCA consoles Prevents the Mute Group or scene preset master from muting the channel and may be used to locally override muted channels VCA MUTE GROUP 1 ASSIGN Assigns the channel mute to VCA Mute Group 1 with led
64. with led indication 2 and 3 4 5 6 7 8 Routes the post fade post pan channel signal to output bus 2 and 3 4 5 6 7 and 8 if pressed with led indication ON The ON switch enables the channel signal path and is indicated by an led in the switch when the channel is active When OFF all post fade auxiliary sends and routing assignments are muted Internal links allow the ON switch to be configured as a channel CUT METER The six segment led meter comprises a five segment meter fed from one of three points in the signal chain and the PEAK led which is fed simultaneously from all 3 points giving a warning of potential overload signals within the signal path Q2 OPERATION AND MAINTENANCE MANUAL 9601 25 CUE The CUE or SOLO button feeds a Pre fader or post fader signal as selected on the master module PFL or AFL to the Monitor section loudspeakers or headphones replacing the selected monitor source if one is selected The main stereo output of the console is not affected unless SIP Solo in place mode has been selected on the master The yellow led in the CUE switch will flash when the CUE function is active CUE signals from different sources that are active simultaneously in the non interlocked mode will be summed To latch the CUE function press the button quickly and release To unlatch repeat To CUE a signal momentarily hold down the CUE button for at least 1 second On release the CUE will also be
65. y sends For convenient assignment four of the auxiliary buses are denoted as foldback buses F B 1 Foldback 1 upper control Controls the level of the channel signal fed to the Foldback 1 bus This signal is normally post fader unless the PRE button just below is depressed Internal links on the module pcb allow the pre fader feed to be pre or post EQ paired with F B 2 F B 2 Foldback 2 lower control Controls the level of the channel signal fed to the Foldback 2 bus This signal is normally post fader unless the PRE button just below is depressed PRE Selects the signal feed for Foldbacks 1 and 2 to be pre fader rather than post fader F B 3 Foldback 3 upper control Controls the level of the channel signal fed to the Foldback 3 bus This signal is normally post fader unless the PRE button just below is depressed Internal links on the module pcb allow the pre fader feed to be pre or post EQ paired with F B 4 F B 4 Foldback 4 lower control Controls the level of the channel signal fed to the Foldback 4 bus This signal is normally post fader unless the PRE button just below is depressed PRE Selects the signal feed for Foldbacks 3 and 4 to be pre fader rather than post fader Q2 OPERATION AND MAINTENANCE MANUAL 9601 22 AUX 1 Upper control Controls the level of the channel signal fed to the Aux 1 bus This signal is normally post fader unless the PRE button just below is depressed Internal l
66. y be used with either the normal input module or the dedicated LCR input module The module comprises the LCR Group control and output lower part of module and a mono Matrix mixer section upper part of module Each module has controls for inputs to the Matrix mixer ie they are not feeds from that group to the matrix buses but feeds from the groups etc to the matrix F B 1 3 Adjusts the level of the Foldback 1 master output or 3 fed to the Matrix bus on the module This may be used to feed a global mix set up on the F B 1 bus to any of the 8 matrix outputs F B 3 switch Selects the Foldback output 3 to the matrix instead of F B 1 F B 2 4 Adjusts the level of the Foldback 2 master output or 4 fed to the Matrix bus on the module F B 4 switch Selects the Foldback output 4 to the matrix instead of F B 2 L R Adjusts the level of the summed mono signal from the main stereo left and right outputs fed to the Matrix on the module MONO Adjusts the level of the main Mono centre signal from the main mono output fed to the Matrix on the module 1 Adjusts the level a summed mono signal of the post fader LCR Group A 1 signal input to the Matrix Similarly for Controls 2 4 for LCR Group signals B C and D 2 to 4 Q2 OPERATION AND MAINTENANCE MANUAL 9601 44 Kitee Ei E Amp a Be a J E 2 lg T B Enables talkback signals to be routed to the Matrix output when the communication system is

Telex Music Mixer Q II - FOH User's Manual

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