Cadac C-Type User Manual

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Audio Mixing Console

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CADAC Electronics One New Street Luton Bedfordshire LU1 5DX England Tel +44 (0) 1582 404 202 Fax +44 (0) 1582 412 799 email: info@cadac-s ound.com

While every effort has been taken to ensure the accuracy of the contents in this manual, CADAC Audio Mixing Consoles are being subject to conti nuous development, hen c e the information in this manual may no t reflect latest prod uct updates. © Copyright CADAC Electronics plc. 2005.

Table of conte nts iii

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1.1 Console modularity ....................................................................... 1-1

1.2 Frame rear connections................................................................ 1-1

1.3 Connect Power supply systems....................................................1-2

1.4 Connecting the console frames ....................................................1-4

1.5 Switching ON ...... ............... .... .... ............... .... ............... .... .... ......... 1-7

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2.1 Input Channel 7911 - front panel .................................................. 2-2

2.2 Input Channel 7911 - rear panel ................................................... 2-9

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3.1 Dual Mono Group & Playback module 8063.................................3-2

3.2 Dual Mono Group & Playback 8063 - rear panel ..........................3-6

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4.1 Stereo Group & Playback module 8064........................................ 4-2

4.2 Stereo Group & Playback 8064 - rear panel.................................4-6

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5.1 Auxiliary Group Outputs module 8065.......................................... 5-2

5.2 Aux Groups Output module 8065 - rear panel ..............................5-5

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6.1 Monitoring module 7912 - front panel ...........................................6-2

6.2 Monitoring module 7912 - rear panel............................................6-7

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7.1 OSC/PNG & Communications module 7913 - front panel ............ 7-2

7.2 OSC, PNG & Comms Module - rear panel ................................... 7-8

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8.1 Group to external me te r ............................ .... ............... .... .... ......... 8-1

8.2 Stereo to external meter ...............................................................8-1

8.3 Musical Director’s Output.............................................................. 8-2

8.4 Producer’s Output......................................................................... 8-3

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iv Table of contents

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General Precautions v

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Do not place heavy objects on the control surface, expose it to s harp objects or handle the console in any way that may cause damage e.g. rough handling and/or excessive vibration.

Do not subject the equipment to dirt, dus t, heat or vibration during oper ation or stor age. Never expose the console to rain or moisture in any form. Should the console become wet, turn it off and disconnect from mains without further delay. The console should be given suff icient time to dry out, before recommenc ing operation.

When cleaning the cons ole, never use chemicals, abra sive substances or sol vents. The console control panels should be cleaned using a soft brush and a dry lint-free cloth. For pe rsistent ma rk s, us e a sof t clo t h and is op r opyl alc oh ol. Switches and potentiometers do NOT require cleaning or lubrication. For faders, see below.

Transport the cons ole in its purpose built flight-case; whilst at the sa me time taking precautions to protect the co ntrol surf ace from any damage. Alway s make sure adequate manpower is available and correct lifting methods are taken when moving the console.

Read the following before using the equipment

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

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Keep these instructions for future reference. Follow all warnings in this manual and those printed on the power supply units.

The console must be installed following the guide lines in this manual. Never connect power amplifier outputs directly to the console. Connectors and plugs must never be used for any other purpose than for what they are intended.

Never use the power supply units without covers fitted. All service work must be carried out by qualified personnel only.

The power supply units must always be connected to correctly r ated mains p ower as referred to in this manual and marked on the power supply units. The power supply units must, at all times, be connected to the local mains power supply using the supplied po w er c or d. In c ase s w her e th e supp l ie d p lu g d oes not fi t , a qu al if i ed elec tr ic ia n must be consulted.

The power cord must be routed in such a way that the risks of accidentally stepping on it, stretching it or it being pinched, are minimized.

THIS EQUIPMENT MUST BE EARTHED !

In order to minimize risks of fire hazards and/or electric shock , the power supply unit must ne v er be e x pos ed to moi st ur e or wa te r in any f orm; or b e us ed i n a damp or w et environment. Never place liquid c ontainers, such as for instance coffee/t ea mugs, on the power supply uni t, so as to avoid spillage into openings.

Ventilation slots on the power supply or the console must never be covered or in any other way obstructed. Air flow required for safe operation may otherwise be restricted. Where the console is to be operated in its flight-case, then this must be located in such a way that it allows for proper ventilation.

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C-Type Revision C2005-2

Refer servicing to qualified technical personnel only.

vi General Precautions

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Connecting the mixer systems 1-1

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The C-Type features CADAC’s unique frame design which allow use rs to put any module in any position, thus configuring the console to suit the project in hand. Each module is fitted with XLR connectors and jack sockets on the rear vertical face, enabling the module to be moved quickly and easily .

The C-Type module’s design features a motherboard, with plug-in daughter boards fo r all audio and digital control functions. This ensures servicing simplicity and fast replacement of any faulty component. Each module may be plugged into any position in the console frame, by means of top quality two-part connector system, which is designed as a m ating pair to provide excellent mechanical and electrical reliability.

A rail system is used to guide each mod ule into its correct po sition. Also, the console design allows modules to be removed or inserted without powering down.

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HEADPHONES (PFL) NEXT FRAME

AUDIO BUS FRAME TO FRAME

FIG 1-1. Frame rear connections.

PSU 1

5 AMP FAN FUSE

PSU 2

GND - 0 - FRAME

AUDIO BUS FRAME TO FRAME

The connections on the C-Type console re ar frame include the following (from left to right):

Audio Bus - frame t o frame.

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PFL output to next frame.

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PSU1 co nnector

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PSU2 co nnector

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F rame, GND and 0 V-connections with grounding bar.

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Audio Bus - frame t o frame.

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The use of these connect ors is describe d in 1.3.3 Main and extension frame power

connections an d 1.4 Connecting the console frames.

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1-2 Connecting the mixer systems

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Cadac consoles are designed to al low the use of two independent power supplies in a redundant configu ration – “main” and “backup”. Both power supply units are used to power the consol e system so that under normal conditi ons, the ‘load’ is shared between the “main” and “backup” PSU’s. If a fault occurs in one of the power units (cau sing it to ‘shut-down’), the remaining power unit will power the console.

In situations where it is necessary to provide a separa te ‘feed’ to each PSU, make sure that the cable lengths are the same. This is to minimize any induced a.c. power input noise by ensuring that the “EARTH IMPEDANCE” is the same for both PSU systems.

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FIG 1-2. AC mains grounding diagram (single phase 208-240V)

The a.c.-input connectors on each power supply unit have three conductors: ‘LIVE’ (brown), ‘NEUTRAL’ (blue) and ‘EARTH’ (yellow/green). For safety and electromagnetic compatibility considerations, it is essential that the ‘EAR TH’ conductor is connected on all PSUs

the a.c. supply has an ‘EARTH’ conduc tor that has a

and

continuous circuit to the “zero-signal reference potential” point in the building. The ZSRP po in t i n a b u ildi n g i s u sua ll y f o un d n ea r th e p la ce whe r e the a. c. ‘m ain s’ s up pl y enters the building (often referred to as the “MAIN GROUND REFERENCE EARTH ELECTRODE SYSTEM”). The basic concept for correct a.c. mains wiring distribution is shown in figure 1-1. If you need further information about this complex subject, please refer to “Grounding Systems and their Implementation” by Charles Atkinson and Philip Giddins published in the AES Journal Vol. 43, No. 6 – June 199 5.

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The g rounding schem e in CADAC consoles is designed to meet the rigorous EEC

Electromagnetic Compatibility

requirements (EMC Directive - 1996). Any RF noise induced in the console frame(s) is directed to the “local” ZSRP, which is the metalwork of the power supply u nits. In o rder to take full advantage of the “RF noise immunity” capability of the CADAC system, PSU a.c. mains cables and the a.c. mains supply EARTH conductor must be conn ected correctly.

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Connecting the mixer systems 1-3

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CADAC power supply units are designed to run from a minimum of 208V, 50/60Hz a.c. In many parts of the world where the single phase a.c. supply is 110/120V, the CADAC power supplies are adjusted to operate at this input voltage.

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See fig 1-3 below for schematics of the frames power connections.

FIG 1-3. Power connections

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1. Connect a PSU cable between the PSU 1 a nd the PSU connector on the MAIN FRAME.

2. Connect a PSU cable between the PSU 2 and the PSU 2 connector on the MAIN FRAME.

3. Repeat procedures 1 and 2 for EXTENSION FRAME 2 (a 3 frame console).

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1-4 Connecting the mixer systems

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If the console is used in a multi-frame configur ation then th e busses need to be connected in a ‘daisy chain’ fashion.

Each end

(see fig 1-4). The bus cables are simply linked betwee n similar connectors on the

end of the nearest frame.

of a frame has six audio bus connectors

FIG 1-4. Audio/Data Bus connections.

Input channel mo dule 7911 2-1

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The C- type input channel module is featured with microphone and line level inputs, controlled via a stepped gain control calibrated in dB. A three band equalizer with a HP-filter is provi ded as well as four mono auxiliary sends and a stereo fo ldback. Routing can be perf ormed to 16 groups a nd the module features a separate stereo mix. The direct output is controlled via a dedicated level control. An LED meter with a measuring range of 57 dB is positioned beside the channel fader and indicates the pre-fade r/direct ou tpu t si gnal level.

Following pages describes the 7911 module in detail.

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2-2 Input ch annel modu le 7911

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2.1.1 Input Gain

2.1.2 Input Trim

2.1.3 Input 2

2.1.5 Line-up tone

2.1.7 Phase reverse

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Dual gang Input gain for microphone and Li ne level inputs, set on a stepped switch providing setting ranges of 50dB and 32dB respectively.

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2.1.4 Phantom power

2.1.6 M-S

2.1.8 LINE

2.1.9 Stereo

2.1.10 Groups

The input trim control provides a continuous +/- 6dB of change on the input gain.

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Push-button to select the second input as the input source in place of I/P 1.

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Push-button to switch ON the 48V phantom power.

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Press this button to apply a line-up tone to the input.

C-Type Revision C2005-2

Input channel mo dule 7911 2-3

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Press M-S when the channel is used for the side microphone in M-S applications. This function is only available when M-S safety (on the 8064) is selected ON.

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Press this button to reverse the phase of the Mic and Line inputs.

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Press this button to connect the second input to the Line Input amplifier, This function i s available ONLY when th e MASTER RE-MIX is ON.

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Press this button to route the channel output to the L and/or R stereo buss.

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Push-buttons f or r outi n g t he c hann el ou tp ut t o t he G roup ma ster s . When t h e ch anne l is used in surround mode the busses are pre-designated.

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2-4 Input ch annel modu le 7911

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2.1.11 HF Q control

2.1.13 HF EQ Bell/Shelf switch

2.1.14 MF Q control

2.1.16 LF Q control

2.1.18 LF EQ Bell/Shel f sw itch

2.1.19 Equalizer In/Out

2.1.20 HP filter In/Out

2.1.22 Aux Sends Pre switches

2.1.12 HF Frequency, Boost/Cut control

2.1.15 MF Frequency, Boost/Cut control

2.1.17 LF Frequency, Boost/Cut control

2.1.21 H P Filter Frequency control

2.1.23 Aux Sends 1-4 level controls

2.1.24 Stereo foldback Pre switch

2.1.26 Direct O/P Pre switch

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The Q-control varies the bandwidth of the boost/cut at the frequency chosen (Q is only available at the default BELL response). A low Q-value gives a wide bandwidth. This means that a relatively large range of frequencies, either side of the centre frequency, have boost /cut applied. When the Q-value is high, the bandwidth is reduced so tha t a much smaller range of frequencies hav e boost/cut applied.

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Dual ganged control allow you to choose the “centre” frequency at which the boost/ cut is appli ed and to define the amount of boost or cut applied to the high frequency band.

2.1.25 Stereo foldback

2.1.27 Direct Output level

C-Type Revision C2005-2

Input channel mo dule 7911 2-5

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Press this button to change the response of the equalizer from BELL (default response) to SHELF.

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The Q-control varie s the bandwidth of the boost/cut at the frequency chosen (Q is only available at the default BELL response). A low Q-value gives a wide bandwidth. This means that a relatively lar ge range of frequencies, eit her side of the centre frequency, have boost /cut applied. When the Q-value is high, the bandwidth is reduced so tha t a much smaller range of frequencies have boost /cut applied.

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Dual ganged control allow you to choose the “centre” frequency at which the boost/ cut is appli ed and to define the amount of bo ost or cut applied to the mid frequency band.

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The Q-control varie s the bandwidth of the boost/cut at the frequency chosen (Q is only available at the default BELL response). A low Q-value gives a wide bandwidth. This means that a relatively lar ge range of frequencies, eit her side of the centre frequency, have boost /cut applied. When the Q-value is high, the bandwidth is reduced so tha t a much smaller range of frequencies have boost /cut applied.

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Dual ganged control allow you to choose the “centre” frequency at which the boost/ cut is applied and to define the amount of boost or cut app lied to the high frequency band.

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Press this button to change the response of the equalizer from BELL (default response) to SHELF.

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Press the EQ IN button to put the equalizer in the channel signal chain.

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Press the HPF button to switch the high-pass filter In/Out of circuit.

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Variable frequency control for choosing the frequency at which the filter starts to “turn over” (also known as the knee or -3dB point for the filter). The “turn-over” frequency is continuously variable from 15 to 400 Hz and provides a cut of 12dB/oct.

Revision C2005-2 C-Type

2-6 Input ch annel modu le 7911

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This switch functions in conjunction with the PRE selector switches on the rear panel to provide the option of sending from PRE/POST EQ or PRE/POST fader.

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Rotary control for setting the Aux Send level.

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This switch functions in conjunction with the PRE selector switches on the rear panel to provide the option of sending from PRE/POST EQ or PRE/POST fader.

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Dual ganged control allow you to adjust stereo foldback Level and Pan.

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This s wit ch fu nc ti on s i n conj un ct io n wi th the P RE se lect o r s w itch on t he rear p anel to provide the option of sending from PRE/POST EQ or PRE/POST FADER.

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Rotary co ntrol for adjusting the direct output level.

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Rotary knob for adjusting the sub-woofer level.

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Pressing this switch enables Left-Centre-Right, Fr ont-Back and Sub woofer level. controls.

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Pressing this switch enables Left-Right and Front-Back level.

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Pressing this switch enables Left-Right panning on the ste reo bus.

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Pressing this switch enables Left-Right panning across the groups

C-Type Revision C2005-2

+ 46 hidden pages

Cadac C-Type User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Table of conte nts iii

General Precautions v

Connecting the mixer systems 1-1

Input channel mo dule 7911 2-1

2.1.1 Input Gain

2.1.2 Input Trim

2.1.3 Input 2

2.1.5 Line-up tone

2.1.4 Phantom power

2.1.11 HF Q control

2.1.12 HF Frequency, Boost/Cut control