Telex Q II - FOH manual

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 improv ement, specificatio[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 2 Contents 3 DECLARA TION OF CONFORMITY 4 GENERAL INFORMA TION 5 THE Q2 IN USE 7 W ARRANTY 9 DIMENSIONS 10 SPECIFICA TIONS 12 WIRING CONSIDERA TIONS 12 GROUNDING 15 ATTENTION 16 MODULE DESCRIPTIONS 18 THE MA TRIX SECTION 19 THE 20DB P AD 20 INPUT MODULE 28 VCA INPUT MODULE 31 STEREO EFFECT RETURN MODULE 36 [...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 3 Declaration of Conformity The Manufacturer of the Pr oducts covered by this Declaration is Klark T eknik Building, W alter Nash Road, Kidderminster, W orcestershire, DY1 1 7HJ. The Directives Cover ed by this Declaration. 89/336/EEC Electromagnetic Compatibility Directive, amended by 92/31/EEC & 93/68[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 4 GENERAL INFORMA TION 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 spa[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 5 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[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 6 LEFT CENTRE RIGHT EFFECTS F/B MA TRIX OUTPUTS (8) Q2 (4) 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 al[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 7 W ARRANTY 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 E[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 8 DDA shall not be liable for any damage caused to persons or property due to :- i) Incorrect usage of the Equipment ii) 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. In no ci[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 9 Q2 Dimensions 24 Input Frame W idth : 1255mm / 49.4" Depth : 810mm / 31.9" Height : 368mm / 14.5" 32 Input Frame W idth : 1505mm / 59.25" Depth : 810mm / 31.9" Height : 368mm / 14.5" 40 Input Frame W idth : 1755mm / 69.1" Depth : 810mm / 31.9" Height : 368mm / 14.5&[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 10 SPECIFICA TIONS Note : All specifications relate to dBu, ie 0dBu = 0.775V RMS MAXIMUM GAIN Mic Input to Mix Output: 86dB Line Input to Mix Output: 40dB FREQUENCY RESPONSE Mic Input to Mix Output: 20Hz , -0.50dB (gain 55dB) 20kHz, -0.20dB Line Input to Mix Output 20Hz , -0.50dB (gain 0dB) 20kHz, -0.20dB N[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 11 Q2 Power Supply Specifications AC Mains V oltage selection :- 1 10V/120V/220V/240V Power Consumption (max) : 750V A AC Mains frequency : 50Hz. - 60Hz Fuse Ratings: 220/230/240V - 6.3A 90/100/120V - 10A Cooling Method: Internal fan DC Power Outputs: +17 V olts, 7A max -17 V olts, 7A max +48 V olts, 0.35A [...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 12 T o 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 [...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 13 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 distributio[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 14 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 EAR TH. Connect all equipment in a logical sequence, starting with the monitor systems, followed by the mul[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 15 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[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 16 MODULE DESCRIPTIONS THE CUE SYSTEM CUE PRIORITY CUE BUTTON ACTION MOMENT AR Y OR LA TCHING SOLO MODE 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, [...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 17 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 a[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 18 THE MA TRIX 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. T raditionally , matrices have been used to provide backstage mix[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 19 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 [...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 20 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. Dedicated LCR input modules have 4 routing buttons marked A, B, C, and D instead of buttons 1-8. MTR This sub-panel preset is fo[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 21 EQUALISER The Q2 Equaliser is 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 se[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 22 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 auxiliary sends. For convenient assignment four of the auxiliary buses are denoted as foldback buses. F[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 23 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 links on the module pcb allow the pre-fader feed to be pre or post-EQ (paired with Aux 2). AUX 2 (Lower control) Controls th[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 24 ROUTING AND ST A TUS PA N In normal mode and with the P AN set to centre, equal levels are sent to both sides of the stereo mix or to ODD and EVEN groups that are in use, with a 4.5dB drop relative to fully clockwise or anti- clockwise. Setting the P AN control fully anticlockwise sends full level to the[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 25 1 Routes the post-fade, post-pan channel signal to output bus 1, 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 a[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 26 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)[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 27 CONNECTORS AND PIN ASSIGNMENTS MIC INPUT :XLR type 3 pin connectors, Balanced Nominal level : -56dBu to -8dBu Pin 1 - Ground Pin 2 - Signal +ve (hot) Pin 3 - Signal -ve (cold) Input impedance : >2k. LINE INPUT :1/4" TRS Jack Socket, 'A' Guage, Balanced Nominal Input Level : +4dBu T ip :[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 28 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 ma[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 29 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 c[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 30 EXTERNAL VCA F ADER CONTROL WIRING[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 31 As an option, in place of a standard input, a stereo effect return input may be fitted. The ef fect 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. [...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 32 HF EQ A shelving equaliser with an adjustable gain of +/-15dB at a frequency of 12kHz. LF EQ A shelving equaliser with an adjustable gain of +/-15dB at a frequency of 50Hz. F/B and AUXILIAR Y SENDS F/B 1/2 This dual concentric pair of level controls adjusts the amount of signal fed to foldback buses 1 an[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 33 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 o[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 34 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 th[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 35 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 : >10 kOhm LINE B : 1/4" TRS Jack Socket, ‘A ’ Gauge, Balanced Nominal Input Level: +4dBu T ip : Signal +ve (Hot) Ring [...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 36 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[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 37 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. MA TRIX METER Sub-panel preset used to calibrate the M[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 38 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 . MA TRIX SE[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 39 CONNECTORS AND PIN ASSIGNMENTS Group 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 : <75 Ohm Matrix Ouptut : 3 Pin XLR type, Balanced Nominal Output Level: +4dBu Pin 2 : Signal +ve (Hot) Pin 3 : Signal -[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 40 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[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 41 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. MA TRIX METER (L and R) Sub-panel preset used to calib[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 42 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 indic[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 43 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 : <75 Ohm Matrix Output : 3 Pin XLR type, Balanced Nominal Output Level: +4dBu Pin 2 : Signal +ve (Hot) Pin 3 : Signal -[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 44 The LCR Subgroup Output module has three outputs (for the left, centre and right outputs from each group). It may 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 (up[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 45 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. MA TRIX METER Sub-panel preset used to calibrate the M[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 46 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 m[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 47 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 : <75 Ohm Matrix Output : 3 Pin XLR type, Balanced Nominal Output Level: +4dBu Pin 2 : Signal +ve (Hot) Pin 3 : Signal -[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 48 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 or loudspeakers), with flashing led indication. See the Input Module for a functional descript[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 49 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 descr[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 50 STEREO MASTER MODULE SOLO METER Indicates the level of the Solo signal in stereo. PFL METER Indicates the level of the PFL signal. METER CALIBRA TIONS Sub-panel presets to calibrate all module and meterbridge master meters. PSU INDICA TOR LEDs Three led’ s which indicate all DC voltages are present. CU[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 51 INTERNAL SINEW A VE/NOISE GENERA TOR 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 1[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 52 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. T APE Selects the T ape input as the monitor source. L/R Selects the main Stereo Left/Right output as the moni[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 53 CUE/SOLO MASTER SECTION PFL/AFL Selects the Cue/Solo mode to be PFL, or AFL when the switch is depressed. 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[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 54 T ALKBACK SYSTEM In addition to the normal talkback microphone input, Q2 includes a Clearcom-type communications interface. S/T ONE 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 [...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 55 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 monit[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 56 MASTER CONNECTOR P ANEL CONNECTORS AND 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 : <75 Ohm Mix Ins[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 57 VCA MASTER MODULE The effect return VCA master is only fitted to consoles with the optional VCA Grouping inputs. The effects return section may be controlled by the VCA masters. GAIN Adjusts the gain of the effect return input section. The gain is adjustable from -15dB to +15dB. L CUT Cuts the signal fee[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 58 F/B and AUXILIAR Y 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 fr[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 59 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 o[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 60 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, the VCA control reverts to a fixed unity gain setting. This is useful for quickly resetting all i[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 61 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 : >10 kOhm LINE B : 1/4" TRS Jack Socket, ‘A ’ Gauge, Balanced Nominal Input Level: +4dBu T ip : Signal +ve (Hot) Ring [...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 62 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 su[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 63 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 C[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 64 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[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 65 The talkback microphone amplifier is adjustable in level from a front panel control and can be routed to the same destinations 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 SID[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 66 This board contains the master sections for the auxiliary outputs of the console in addition to headphone 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 [...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 67 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. THE FOLDBACK MASTER MODULE[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 68 THE SIGNAL P A TH 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 ci[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 69 If the solo 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 [...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 70 Q2 P ANNING 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 ce[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 71 ON/CUT CIRCUIT The ON circuit of an input module is based around IC1 1 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 rever[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 72 THE MIDI INTERF ACE. 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.[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 73 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 [...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 74 INPUT MODULE ROUTING LINKS LK Mono Stereo LCR 6 * 20 * 21 * 22 * 23 * 24 * 25 * 26 * 27 * 28 * 31 * 32 * * 33 * 34 * * 35 * 36 * * 37 * 38 * * 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 hig[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 75 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 switched to control the direct output which is normally post fader . The VCA version of the consol[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 76 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 [...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 77 MONO GROUP OUTPUT LINKS Link Function 1, 2 Group Bus Programming ** 3, 4 Matrix Send Programming ** (5), (6) Group T ransformer Balancing (7), 8 Post/Pre Mute Matrix Send (9), (10) Matrix T ransformer Balancing (1 1) Link for non VCA version 12, 13, (14) Cut/On Lamp ** Installed link depends upon module [...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 78 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 s[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 79 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 output is mono and is fed from a mix of the LCR signals. The matrix returns are stereo capable and again foldback and [...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 80 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 t[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 81 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[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 82 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 [...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 83 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 the ICs is fed via an enable switch to the VCA group[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 84 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 insta[...]

Q2 OPERA TION AND MAINTENANCE MANUAL 9601 85 Links 15 - 22 are used for bus routing and are installed as follows. Link Standard Input Stereo/Mono 16 15 * 16 * 17 * 18 * 19 * 20 * 21 * 22 *[...]