AIRMIX - D&R Broadcast Mixing Consoles
Contents
1. This is an automatic prefade listen system post pan pot which enables you to listen to a channel without actually opening that channel When the cue button is activated the channel signal will be connected to the cue output and meter circuitry when the fader is closed or open dependent on jumper settings the yellow cue led indicator will illuminate When the channel is active the cue system will be reset including its associated led however it is possible re activate the CUE switch Channel Cueing on D J channels will only be heard in the headphone outputs The CRM output will be muted The Cue switch can also generate a start stop pulse for remotely connected machines by changing jumper settings The cue signal can be heard in two ways 1 Through the stereo Control Room Monitors by activating the autocue switche in the master section If the cue is activated in one of the channels the CRM and meters will be activated without interruption of the main output 2 By way of an externally connected cue amplifier with loudspeaker Airmix manual page 14 TRIPLE INPUT SECTION ON The channel on off switch operates in tandem with the fader start There are two visible intensities of the illuminated led indicators 1 Low glowing red led channel is on stand by mode 2 Bright emitting red led channel is active There are two methods of activating the channel A Depress the switch red led is softly glowing2. so a different strategy needs to be adopted Equipment such as CD players do not have a mains ground connection In this case the shielding can be connected on both sides of the connection a ground loop will not occur Try to choose a CD player with metal housing If you experience problems with the transmitter interfering with the CD sound connect the CD housing to a ceramic capacitor of 0 01 uF 250 V to the mains earth Audio Connections to the Airmix Prior to commencing wiring of the studio it is advisable to obtain some labels which will simplify trouble shooting Label such as CD 1 chl 2A The first step is to connect the Airmix to the mains with all faders closed no CRM active and the CRM volume controls fully clock wise A Connect the CRM amp to the CRM output and check whether there is any hum or noise B Now connect the phono players and check again for hum and noise NOTE In most cases it is a matter of finding the best grounding for the phono ground by trial and error This might be directly to the audio ground or to the chassis of the Airmix Now connect Tapedeck Cartmachines CD players etc Airmix manual page 34 INSTALLING THE AIRMIX NOTE Wiring a tuner needs special attention If the tuner is cable the coax antennae cable will probably cause a ground loop The antennae input of the tuner must be separated by an H F transformer ask your dealer or any radio shop for details IMPO
3. 2 10dBV 3 4 OdBu 1 2 10dBV 3 4 OdBu 1 2 10dBV 3 4 OdBu 1 2 ON 3 4 EXT 8 INSTALLING THE AIRMIX Mains Please check that the local mains supply corresponds with the voltage selected on the Airmix mains inlet The Airmix can be factory set for voltages between 100 120 Volt or 220 240 Volt The Airmix is fused with a 2 Amp slow blow fuse for 110 Volt or 1 2 Amp slow blow fuse for 220 Volt DO NOT use any other value as this would be hazardeous and the Airmix guarantee will be void Clean Power Connection Be sure to use a clean power outlet i e one that is fed directly from the mains including earth Only connect the Airmix to this outlet and its associated equipment This will act as the centralized mains and earth for the studio It is advisable to install several multiple mains connectors close to the Airmix with a master power switch to shut down all power to the studio Grounding MUST BE a starground system Keep all wires as short as possible but never install audio next to power cables Polluted mains are caused by changing currents on the outlets such as air conditioners coffee machines fridges computers dimmer packs etc DO NOT connect any of these types of items to the Airmix main power outlet Wiring In cases where all the equipment is transformer balanced it is usual to connect the shielding of the wiring to the source side only In the Airmix many of the sources will be unbalanced
4. A 77 require additional relays or switching transistors to operate satisfactorily contact your dealer for more information LINE GAIN The seperate Line Gain control adjusts the gain of the stereo channel pre amps within a range of 20 dB to 20 dB The range of the fader VCA gives an additional 10 dB of gain when needed Alignment of the channel With the fade closed or muted channel and the cue switch is activated the Autocue in the master section must be activated The gain control is used to adjust the level of the incoming signal until a zero dB reading is achieved If the switch is now activated the signal level will be nominal When the fader is opened the cue signal will be automatically reset and its associated led will switch off Stereo Mono Switches With two pushbutton switches Mono L and Mono R the incoming left and right signals can be switched to mono or stereo When both switches are in their up positions the module will accept stereo signals When both switches are in their down positions Mono summing of the stereo input signals occurs When Mono L is in its down position the mono signal coming in from the left input will be sent to both signal paths of the stereo line module When Mono R is activated only the right signal will be sent to both stereo signal paths Airmix manual page 13 TRIPLE INPUT SECTION Equaliser The equaliser is optimised for broadcast Centre detents on all equ
5. ON AIR SIGNALLING OUTPUTS IN THE MASTER SECTION Airmix manual page 5 SYSTEM DESCRIPTION Broadcasting Options In designing the Airmix D amp R decided to make the system as flexible for the operator as possible and the Airmix can therefore be used in many ways There are many jumper settings which can be set to suit your own needs The Airmix can be used in a traditional manner with separate control and announcer rooms or in a more open way whereby announcing and engineering control are carried out in one room A self op set up or a combination of several set ups is possible More than one Broadcast Studio There are numerous monitor facilities in the Airmix for external sources as well as internal The control monitors and meters can be switched to follow the control room for separate stereo sources These features mean that the Airmix is specially suited to work in a studio complex environment where there is more than one studio control room being used for broadcast In this situation the Airmix is capable of being the main On Air console due to the three main outputs it contains which are fully transformer balanced Separate Compressions for Mono and Stereo Outputs All three main outputs have their own inserts to accept signal processors such as the D amp R compressor limiters A significant feature of the Airmix is that separate compression can be set for mono and stereo outputs For example a higher compression c
6. guarantuee a stable performance at all times More current is taken from the internal power supply because you have put in more modules now It is necessary to adjust the power supply voltage to a precise level of 16 7 volts for both the positive and negative rails with all modules connected Adjustment is performed on the power supply PCB mounted on the bottom of the console located beneath the master section Power supply voltage is measured across the output terminals of the power supply PCB inside the console NOTE If the power supply voltage is not adjusted to 16 7 volts again it may be possible that certain logic functions may not work properly all times Airmix manual page 36 9 SPECIFICATION INPUTS OUTPUTS EQUALISATION OVERALL REMOTES WEIGHT OPTIONS DIMENSIONS Mic inputs balanced 2 kOhm R F protected C M R R at 50 Hz 76 dB Sensitivity 70 dBu to 16 dBu for 6 dBu out Signal to noise ratio 129 00 dBr LINE INPUTS Line stereo inputs Balanced Unbalanced 10 kOhm minimum Signal to noise ratio 90 dB Sensitivity 20 dBv to 20 dBv active controlled for 6 dBv output Insert input unbalanced at 10 kOhm Sensitivity OdBv Tape returns in master 10 dBv or 0 dBu at 10 kOhm Left right mono 0 46 dBu transformer balanced Aux 1 2 Telco send Cue CRM OdBu at 47 330 Ohm unbalanced Phones Announcer Guest 15 dBv at 47 Ohm 12 dB at 10 kHz shelf 12 dB at 3 kHz bel
7. interrupted The ring of the jack sends the signal pre equaliser and on the tip of the jack the signal returns just before the equalizer In this way it is therefore possible to insert a D amp R compressor or other signal processor or microphone only signals It is also possible to use this insert jack as a direct send without interrupting the signal path In that case you connect tip and ring with each other this can be usefull for driving external producers desks or for selective recording etc By de activating the MIC switch it is possile to use the stereo line inputs at the same time or other stereo sources to be mixed into the main outputs Airmix manual page 11 TRIPLE INPUT SECTION REMOTE COUGH SIGNALLING IN MIC MODE This useful feature has two important functions 1 Cough communication 2 Mic on 1 Cough Communication A pushbutton needs to be connected to the ring and sleeve of the jackplug Using the pushbutton during broadcast the announcer can temporarily mute the microphone in order to cough where the name comes from At the same time his microphone will be routed to the cue system in order to give him the opportunity to communicate with the engineer producer 2 Mic on When the channel is active a voltage is applied between Tip and Sleeve OV which can be used to activate a led red or an opto coupler In addition to the localised mic on signalling there is also a master signal in the master sectio
8. mood Input impedance is 2 kOhm high enough to accept all modern microphones A seperate Gain control can vary the input levels between 70dB and 16 dB in one turn The signal to noise ratio is 129 0 dBr and is therefore well suited to low noise performances Phantom Powering This 48 Volt power is required for condenser microphones and can be applied to the microphone inputs via jumper settings see jumper settings When the phantom power is applied and the channel is active a click can be heard when a microphone is plugged in This is due to a D C component on the input which is suddenly interrupted and amplified by 70 dB it is therefore important not to do this with channel faders up and channel ON DO NOT use unbalanced or electret microphones when the phantom power is applied as it could damage the microphones High Pass Filter on MIC The high pass filter attenuates the low frequencies below 80 Hz and can be switched on or off by jumper settings see jumper settings It is only active on MIC inputs NOTE Some microphones have built in high pass filters and therefore do not require use of the Airmix high pass filter Microphones used for speech are usually set for high pass filtering in order to avoid popping and other unwanted low frequency rumble and therefore improves the quality and intelligability of the spoken word MIC Insert When a jack is plugged into the Mic insert jack the signal path is
9. phone line A wire Ring phone line B wire Sleeve not connected Line B Input Connector type is jack Tip phone line A wire Ring phone line B wire Sleeve not connected Airmix manual page 19 TELCO MODULE The input impedance for both Phone A and Phone B are optimized for correct loading of modern telephone stations PHONE A Input Connector type is Jack Tip phone line A wire Ring phone line B wire Sleeve not connected PHONE B Input Connector type is jack Tip phone line A wire Ring phone line B wire Sleeve not connected REMOTE The remote connector lets you activate the CUE of the Telco module when the module is in its off or standby mode A convenient way of communicating for the announcer director with callers An ON led can be connected to the remote to indicate the ON status of the Telco module The same Led indicates incoming calls by flashing REMOTE Input Connector type is jack Tip Channel ON led Ring Cue control Sleeve Ground COMMUNICATION WITH TELCO MODULE ENGINEER TO FROM TELCO Communication with the engineer is easily accomplished by activating the Cue switch in the Telco module An open communication is achieved now between caller and engineer DIRECTOR TO FROM TELCO The Cue switch on the Telco module has to be activated Now dependent upon internal selection of the director communication jumpers switched off on the director has communication with
10. right The peak indicator acts as a warning that the audio signal is 4 dB clipping Cue enables pre fade listening post panpot in order to adjust the gain control whilst the fader is closed or the switch is off The cue will be automatically disabled when the channel fader is opened if the ON switch is active or when the ON switch is activated if the fader was already open Channel on off switch Switches the channel to stand by mode when the fader is closed the red led will softly illuminate When the on switch is not activated the channel fader can be opened red led on without bringing the audio up and without generating a mic on signal The channel can now be activated including mic on signalling by pressing the on switch red led from low to high intensity The cue will be automatically reset Channel switch and volume control This fader controls the audio signal level by means of a high quality VCA Airmix manual page 10 TRIPLE INPUT SECTION Mono Microphone input The front end of this module is designed to amplify balanced microphone signals A 48 Volt phantom power supply is available for condenser microphones The Airmix has the ultimate in mic amplification with a wide dynamic range and extremely low noise The microphone input is electronically balanced and protected against R F interference The input has RF cancelling input coils to avoid hearing radio Moskou when you are not in the
11. settings see jumper settings Airmix manual page 12 TRIPLE INPUT SECTION START STOP FUNCTIONS The fader Start and Stop is normally active when input is selected however jumpers change Line A STOP into a Start connector of line B input These remote connectors are activated by the fader and or switch in the channel module The start and stop jack connectors are electronically separated by use of encapsulated reed relays The stop connector can be used for recue of appliances Reed relays are ideal devices for eliminating ground loops and limited lifespan effects of other switches and can easily be interfaced with all modern equipment The start and stop connectors are connected to separate reed relays The maximum current is 50 mA Current limiting resistors of 10 Ohm are placed in series with the reed relay contacts to protect them from abuse Polarity is not important with reed relays NOTE 1 Nearly all modern devices require pulse information Continuous signals however can have the advantage that during broadcast a CD player cannot be accidentally stopped One disadvantage however is that some CD players are blocked from other functions when started with a continuous pulse NOTE 2 It is advisable to only use the pulse start mode with jingle machines and not connect the stop jack The cart has to finish its tape to the end and then automatically rewinds NOTE 3 Some of the older products such as the
12. the caller In the case of the switched jumper selection the remote unit can be used to activate the communication with the Telco module ANNOUNCER TO FROM TELCO The Cue switch on the Telco module and the autocomm switch in the master section has to be activated The moment the Annoucer hits his cough switch communication takes place between announcer and caller Telco module Airmix manual page 20 6 0 MASTER SECTION STUDIO STUDIO In the Studio area are three monitor systems which can be used as needed in your studio situation MONITOR The monitor will give a mono signal fed from the From sub switches Talk back level into the Monitor output is independent of monitor level settings Output of the monitor is mono and both tip and ring are fed with signal to easily interface with stereo amps in the studio area The monitor output is mainly intended to be used as an overall output to monitor what is going on during broadcast maye in other area s than the studio room itself A useful option during broadcast is to jumper all outputs of the individual channels except the studio microphones and to amplify the summed signal through a small loudspeaker in the studio This enables everyone present in the studio to follow the program material If the loudspeaker is set to a low level it will not colour the sound of an open microphone The monitor output is wired to a stereo jack socket with the following configuration T
13. 12 0 PRODUCT SAFETY Current will flow when there is a difference in ground potential between equipment on stage and in the P A system Please do check if there is any potential between the housing of the mics and the guitarsynth amps which will be linked by your body on stage Imagine a guitar in your hand and your lips close to the mike A ground potential difference of above 10 volts is not unusual in improperly wired buildings it can possibly be as high as 240 volts Allthough removing the ground wire sometimes cures a system hum it will create a very hazardeous situation for the performing musician Always earth all your equipment by the grounding pin in your mains plug Hum loops should be only cured by proper wiring and isolation input output transformers Replace fuses always with the same type and rating after the equipment has been turned off and unplugged If the fuse blows again you have an equipment failure do not use it again and return it to your dealer for repair And last but not least be carefull not to touch a person being shocked as you yourself could also be shocked Once removed from the shock have someone send for medical help inmediately Always keep the above mentioned information in mind when using electrically powered equipment D amp R ELECTRONICA B V WEESP HEAD OFFICE D amp R Electronica Weesp b v Rijnkade 15B 1382 GS WEESP THE NETHERLANDS Phone 31 294 418 014 Fax 31 294 416 987 Webs
14. E 10Kohm Tip Return Ring Send Sleeve Ground female 1 CRM right feeds meter right 2 ground 3 External CUE led drive 4 ground 5 Mix right signal extra meter output 6 meter left feed Mix left or CRM left 7 18 volt 8 18 volt 9 Mix left signal extra meter output Level OdBu 47 Ohm Tip Left Ring Right Sleeve Ground Level OdBu 10dBV 47 Ohm Tip Left Ring Right Sleeve Ground Level 15dBu 330 Ohm Tip Left Ring Right Sleeve Ground Level OdBu 10dBv 47 Ohm Tip Left Ring Right Sleeve Ground 7 AIRMIX JUMPER SETTINGS TRIPLE INPUT MIC LINE LINE MODULE Default A ANNOUNCER COM 1 2 ON 3 4 OFF OFF B TIMER 2 2 3 OFF 3 4 ON ON C LINE ON AIR2 1 2 ON 3 4 OFF ON D MIC ON AIR2 1 2 ON 3 4 OFF OFF E MIC ON AIR1 1 2 ON 3 4 OFF ON F LINE ON AIR 1 2 ON 3 4 OFF OFF G DJ MIC 1 2 ON 3 4 OFF OFF H MIC TO MONITOR 1 2 ON 3 4 OFF OFF I LINE TO MONITOR 1 2 ON 3 4 OFF ON K LOW CUT 1 2 OFF 3 4 OFF L CUE LINE A START STOP 1 2 OFF 3 4 OFF M STOP A OR START B 1 2 CONT 3 4 PULSE PULSE N START A 1 2 CONT 3 4 PULSE PULSE O START B 1 2 STOPA 3 4 STARTB STOP A P 48 Volt J23 1 2 3 4 OFF Q AUX PRE POST 1 2 POST 3 4 PRE POST R AUX PRE POST 1 2 POST 3 4 PRE POST NOTE An optional R I A A phono pre amp can be plugged in here The A input of the channel can thus be connected directly to a phono cartridge Jumpers should be removed from the channel co
15. ECTION TALKBACK We advise you to use an externally connected solid state relay A suitable model is the S 201 8 04 from Sharp which switches 220 Volts l S Amp click free A solid state relay is much safer to use and is more reliable The ON AIR 1 2 output can be connected directly to the S 201 8 04 relay in series with a 12 volt dc power supply Connector Tip Center contact Ring Normally open Sleeve Normally closed These signalling outputs are only to be used for low voltage applications The Remote Director is a stereo jack to connect a switch and a signalling led for remotely controlling the talk back of the directors mic input The led will indicate On Air 1 active MASTER SECTION CUE CRM AUTOCUE When this switch is activated both CRM outputs are automatically connected to a selected cue switch in stereo When this witch is not active the CRM will monitor the main outputs The Cue signal will always be present at the Cue output jack AUTO CUE RESET When this switch is depressed the Cue reset circuitry will be active meaning that any activated CUE in the console will be reset by activating any input channel in the console DIM LEVEL This control adjusts the amount of dimming the main output level when talkback is active or the communication cue system is active The range is adjustable from fully cancelling the main output up to 6dB below Cue level FROM AIR This is a stereo switch sourcing the off air signal from a st
16. FORMATION VERY CAREFULLY Especially in sound equipment on stage the following information is essential to know An electrical shock is caused by voltage and current actually it is the current that causes the shock In practise the higher the voltage the higher the current will be and the higher the shock But there is another thing to consider and it is resistance When the resistance in Ohms is high between two poles the current will be low and vica versa All three of these voltage current and resistance are important in determining the effect of an electrical shock However the severity of a shock primarily determined by the amount of current flowing through a person A person can feel a shock because the muscles in a body respond to electric Current can also be fatal when it causes the chest muscles to contract and stop breathing At what potential is current dangereous Well the first feeling of current is a tingle at 0 001 Amp of current The current between 0 1 Amp and 0 2 Amp is fatal Imagine that your home fuses of 20 Amp can handle 200 times more current than is necessary to kill How does resistance affect the shock a person feels A typical resistance between one hand to the other in dry condition could be well over 100 000 Ohm If you are playing on stage your body is perspiring extensively andyour body resistance is lowered by more than 50 This is a situation in which current can easilyflow Airmix manual page 40
17. OdBu 10dBv 10kOhm Tip Left Ring Right Sleeve Ground Level OdBu 10dBV 100 Ohm Tip Left Ring Right Sleeve Ground Level OdBu 10dBV 100 Ohm Tip Left Ring Right Sleeve Ground AIRMIX BACK PANEL CONNECTORS MASTER OUT STEREO Type Jack ON AIR SIGNALLING 1 Type Jack ON AIR SIGNALLING 2 Type Jack REMOTE DIRECTOR Type Jack CRM OUT L R Type Jack EXTERN 1 IN L R Type Jack EXTERN 2 IN L R Type Jack LEFT INSERT Type Jack Airmix manual page 30 Level OdBu 10dBV 47 Ohm Tip Left Ring Right Sleeve Ground REED RELAY MAX VOLTAGE 24VOLT 50mA Tip Center contact Ring Normally open Sleeve Normally closed REED RELAY MAX VOLTAGE 24VOLT 50mA Tip Center contact RingzNormally open SleevezNormally closed Solid state input Tip led output Anode activated by ON AIR 1 Ring normally high active to ground Sleeve ground Level OdBu 47 Ohm Tip Left Ring Right Sleeve Ground Level OdBu 10dBV100Kohm Tip Left Ring Right Sleeve Ground Level OdBu 10dBV100Kohm Tip Left Ring Right Sleeve Ground Level OdBu 100E 10o0hm Tip Return Ring Send Sleeve Ground MASTER BACKPANEL CONNECTORS MONO INSERT Type Jack RIGHT INSERT Type Jack METER Type Sub D AUX OUT STEREO Type Jack SUB OUT STEREO Type Jack PHONES OUT STEREO Type Jack SWITCHED CUE OUT STEREO Type Jack Airmix manual page 31 Level OdBu 100E 100Kohm Tip Return Ring Send Sleeve Ground Level OdBu 100
18. R Quality D amp R has been the largest manufacturer of mixing consoles and signal processors in the Netherlands for 25 years More than 80 of the total production is exported world wide a market which demands excellent price and high quality standards D amp R products are used in studio s and live performances both of which require 100 reliability which is the result of 23 years of research design and manufacturing These high standards of reliability are also to be found imbedded in the new line of broadcast mixers which is particularly important for this type of product required to work around the clock Airmix Quality The high standard of quality of the Airmix is demonstrated by the welded steel RF screening and sturdy housing the heavy duty power supply its modular approach and locking IDC connectors mounted on high quality double sided plated through glass epoxy printed circuit boards The signal paths are electronically switched using C Mos logic and Fet components ensuring reliable and smooth switching High quality 100mm faders control the new redesigned dbx VCA s Switching is performed by isolated encapsulated reed relays guaranteeing many years of trouble free smooth switching Airmix flexibility The Airmix is a specially designed poduction On Air broadcast console Although the design has been carefully budgeted no compromises has been made in either quality or features particularly in the areas of VCA
19. RTANT SAFETY PRECAUTION All outside connections to the Airmix even from the same building must be connected via a transformer This avoids the possibility of ground loops hum The shielding must be connected to the source side In areas with a strong H F interferance it is wise to connect the other side of the shielding through a 0 1 uF 250 Volt ceramic capacitor The capacitor will not affect the audio but will reduce H F signals Servicing the Airmix THINS Q Disconnect the mains supply Remove the power cable from the back of the console Remove the backpanel of the meterhood Remove cabling as necessary Unscrew the channel module bolts Now lift the channel up at the fader section and then the other side Carefully lift the module until you see a connector mounted to a ribbon flat cable On the PCB part of the connector you will see two ejectors with which to eject the cable header Installing the Channel Module A B C Plug the ribbon cable connector into the PCB connector ensuring that the ejectors are securely replaced Slowly put the module down into the chassis rear first Tighten all screws and reconnect the channel Servicing the Master Section Qmumunws Disconnect the Airmix from the mains supply Remove all cables Remove all holding screws Lift the master section from the fader side first Remove the connector to the power PCB Lift the section upwards u
20. VCA volume control adjusts overall channel level and activates together with the switch all on and off switching of remote connectors Airmix manual page 8 MIC LINE INPUT SECTION SHORT OVERVIEW OF MIC LINE CHANNEL FUNCTIONS Microphone input Electronically balanced Impedance 2 kOhm Level from 70 dBu microphone input to 16 dBu Connectors XLR female Pin 1 sleeve Pin 2 hot Pin 3 cold 48 Volt phantom internally set by a jumper see jumper settings Mic High pass filter at 80 Hz internally set by a jumper see jumper settings INSERT Mic insertion point unbalanced on a stereo jack plug Tip return Ring send Sleeve ground OdBu Send impedance is 47 Ohm return impedance is 10 kOhm Inserting a jack will interrupt the signal path before the equaliser REMOTE Remote control of the channels on off and cue switch s and Channel on light signalling Connection by way of a stereo jack Tip Positive supply voltage current limited at 15 mA when the channel is on A direct connection to a led is possible between tip and sleeve Ring When connected to ground the channel will be muted and the cue activated Sleeve ground A Input and B Input The input impedance for both A and B are gt 10 kOhm and the maximum sensitivity ranges from 20 dBu to 20 dBu The signal to noise ratio is 90 dBr R LA A 70 dBr Connector is Jack LINE A balanced connected by two stereo jack sockets Tip in phas
21. al The MIC labelled insert jack is an insert for the incoming phone signal An inserted Limiter keeps spikes from entering the Airmix Telco module Jumpers A number of module functions can be activated by jumper settings see jumper settings TELCO SEND The Telco send controls the outgoing signal to the caller This can be either the MIX or Sub output dependent upon the SUB switch setting in the Telco module Yes this switch not only controls the assignment of the incoming signal to the masters but also which signal is sent to the caller A B select This switch select either phone line A or B to enter the Telco module Note Switching during an established connection will cancel the connection GAIN The Gain control adjusts the gain of the incoming phone call within a range of 20 dBu to 20 dBu The range of the fader VCA gives an additional 10 dB of gain when needed DUCK The duck switch automatically dims incoming signals when outgoing signals are present giving the presenter priority over the caller as well as better intelligibility HIGHPASS The highpass filter smoothly filters out all frequencies below the passband of the telephone line LOWPASS The low pass filter effectively filters out all above telephone line frequencies NOTE In the standard Airmix Telco module there is no EQ available however if needed we can offer a three band eq on this module The maximum range is then 12 dB at frequencies 5
22. al will be sent both left and right signal paths In the Stereo mode neither Mono L or Mono R switches need to be activated The MONO L R switch has no affect on the mic input HIGH Adjusts high frequencies with 12 dB at 10 kHz shelve MID Adjusts mid frequencies with 12 dB at 3 kHz bell LOW Adjusts the low frequencies with 12 dB at 60 Hz shelve AUX Transmit a stereo signal to the aux master post fader The channel on switch also affects the aux send SUB The sub switch assigns the signal in stereo to the sub output Airmix manual page 7 MIC LINE INPUT SECTION PAN Allows adjustment between the left and right channel outputs PEAK The peak indicator will indicate when the signal reaches 4dB below the clipping point of the module CUE Stereo pre fade listening Allows pre fade listening post pan pot of the channel with the fader closed The cue function will be automatically reset when the channel is activated The CUE switch also generates a start stop pulse in the line mode ON Channel on off switch While in closed fader stand by mode i e when red led is half illuminated When the switch is not activated the channel fader can be opened without activating the fader start and without opening the program signal the red led is softly illuminated The channel can be activated including the start stop command by pressing the ON switch red fully lit FADER Channel
23. aliser controls indicate their flat position Note There are also modules availale without EQ controls The maximum lift and cut is 12 dB at the following frequencies 10 kHz Shelve 3 kHz Bell 60 Hz Shelve Auxilliary The stereo auxiliary send is postfader bringing the signal to the master stereo auxiliary send When the input module is used for microphone signals only both left and right signal paths are fed by the same mono mic input signal The channels switch will also switch the Auxiliary send on or off when it is jumpered post fader SUB The Sub switch switches the stereo modules output from the main output to seperate SUB mix amps located in the master section of the console This setup makes production work possible during ON AIR broadcast due to extremely good crosstalk figures achieved in the Airmix console by carefull usage of high end CAD design systems in the initial design stage of the console The Sub mix can be mixed into the main output mixbuss in the master section This is a convenient way to use the SUB assigment switch as a subgroup system creating new possibilities in the Airmix console PAN The PAN enables adjustment between the left and right signals The range is not restricted in order to enable to position any incoming signal anywhere in the stereo image Peak Indicator The peak indicator comes on when the left or right input signals reach 4 dB from the maximum level of 22 dBu CUE
24. an be set for the mono main output for AM portables or car radios and a lower compression set for the main stereo outputs Special Recording Outputs The Airmix has two separate stereo recording outputs which can be set to either 0 dBu or 10 dbV according to the recording equipment being used Stereo Peak Metering In order to achieve a good balance between spoken words and music it is important to be able to read the recording level accurately The Airmix has thirty seven segment peak reading ledbargraphs with logarithmic scaling and one led per 0 5dB in most critical sections of the scale SUMMARY Whilst using the Airmix you will discover its many hidden features and will continue to appreciate its extensive capabilities Airmix manual page 6 3 0 MIC LINE INPUT SECTION GAIN MIC This gain control adjust the incoming signaallevel on the mic input MIC MIC input selector switch between Mic input or Line A B input When the Led is illuminated the mic input is activeted GAIN LINE This gain control adjust incoming line levels LINE A B A B input selector When line B is selected the red Led is illuminated In this position the remote outputs are not activated MONO UR With both left and right switches activated the stereo signal will be mixed to mono on both outputs with only Mono L activated the left signal will be sent to both left and right signal paths with only Mono R activated the right sign
25. as used for the engineers talk back mic Apart from these assignments it is possible to jumper the Directors mic to the settings described below 1 Director to Telco return and Announcer in autocomm mode by remote connector directors TB switch 2 Director always to Telco return and Announcer in autocomm mode 3 Director never to Telco return and Announcer in autocomm mode NOTE If the autocomm switch is activated talk back can be activated by the Announcer On the back of the master section you can find the following connectors fitted on this board located in this section Tapel out stereo Tape 2 out stereo Master out stereo On air signalling 1 On air signalling 2 Remote director Tape 1 and 2 are stereo outputs with levels either OdBu or 10dBv Master out stereo is an extra stereo output of the main mix either available in OdBu or 10dBv dependent upon jumper settings The ON Air signalling jacks are connected to reed relays driven by the logic of the input channels as described in the channel sections of this manual Using the D J mode it is possible to operate and be an announcer at the same time If the mic on lamp illuminates the loudspeakers and cue loudspeaker are automatically muted Internally microphone channels can be connected via jumpers to the centralised ON AIR signalling connector so when one or more of these channels are opened the mic on signal will be given Airmix manual page 23 MASTER S
26. control switching signalling fader start stop and communication A Self Op switch instantly resets the Airmix to be used by the announcer himself This is the D J mode whereby the logic circuitry in the Airmix helps to prevent the D J from making mistakes causing possible feedback which is an annoying sound anywhere in the audio chain or listening to the wrong source The Airmix is fully modular which means flexibility in the configuration The Triple input modules as well as the Telco input modules can be placed anywhere in the chassis A partially loaded Airmix be completed using low cost blind modules Airmix manual page 4 SYSTEM DESCRIPTION The Airmix is a complete and self contained piece of hardware requiring no additonal items in order to be operated All relevent functions are built in such as fader start stop pulse or continuously selectable There is also no need for complex mic on cough switching to the announcer booth a stereo jack a led and a simple push button switch complete this task The optional SiCo unit is a nice looking alternative with many extra s for Cough switching and monitoring The Meter hood can accept five 9 1 2 signal processors such as limiters the special D amp R timer clock and or specialised functions for broadcast stations Built in stereo headphone amps The Airmix contains built in amps for the announcer guests and the D J no additional amps are needed Clear la
27. e ring out of phase sleeve ground LINE B unbalanced Tip signal left Ring signal right Sleeve ground NOTE By adding an optional plug in stereo R L A A pre amp the A input is able to accept M D phono pick ups See jumper settings Start and Stop connector Stereo jack plug Tip Center contact Ring Normally open Sleeve Normally closed NOTE Polarity is not important with reed relays Pulse or Continuous Signal Using the internal jumper it is possible to choose between a pulse or continuous signal to the remote device NOTE The stop connector can be changed into a start connector of the B input by changing jumper settings when needed Airmix manual page 9 SHORT OVERVIEW OF MIC LINE CHANNEL FUNCTIONS GAIN LINE GAIN HIGH MID LOW AUXILIARY SUB PAN PEAK below CUE ON FADER Line pre amp gain adjustment with a range of 40 dB MIC pre amp gain adjustment from 70 dBu to 16 dB Lift and cut of 12 dB at 10 kHz shelve curve Lift and cut of 12 dB at 3 kHz bell curve Lift and cut of 12 dB at 60 Hz shelve curve A separate post pan post fader stereo send to the master aux Pre fader but post pan is also possible by internal jumper settings The Sub switch switches the stereo modules output from the main output to seperate SUB mix amps located in the master section of the console The pan enables the signal to be precisely placed anywhere between fully left or fully
28. ereo receiver and assigning it to the CRM output It is used to control the off air signal while broadcasting FROM SUB This is a stereo switch bringing the Sub output into the CRM output It will override the from air signal when selected Airmix manual page 24 MASTER SECTION CUE CRM EXTERN 1 2 These are stereo inputs to be used for any stereo source that needs to be monitored in the CRM outputs The input level can be set by jumpers to OdBu or 10dBv CRM The control room monitor controls the outgoing level to the control room monitors Level is OdBu on a stereo jack DIM The dim switch is a momentary switch activating the dimming of the CRM and giving indication of dimming by the TB circuitry and Cue system BACK PANEL CONNECTORS ON THIS SECTION OF THE MASTER CRM out L R This is a stereo jack giving the CRM stereo signal nominal level is OdBu Extern1 2 L R These are the stereo inputs for the external stereo sources level is jumperable between OdBu and 10dBV Insert L amp R The main outputs Left and Right each have their own insertion points These inserts are intended to accept D amp R limiters or compressors Tip return Ring send Sleeve ground Insert Mono Insertion point for the mono output NOTE The mono output can have its own compressor limiter which would be particularly worthwhile when this output is used for transmitting through FM It is usual to have higher compression ratios to increase t
29. file airmixman lwp Du mixing consoles AIRMIA User Manual Airmix manual page 1 AIRMIX MANUAL CONTENTS 1 0 INTRODUCTION 2 0 SYSTEM DESCRIPTION 30 MIC LINE INPUT SECTION 4 0 TRIPLE INPUT SECTION 5 0 TELCO MODULE 6 0 MASTER SECTION 7 0 JUMPER SETTINGS 8 0 INSTALLATION 9 0 SPECIFICATIONS 100 SICO REMOTE UNIT 11 0 QUESTIONNAIRE 12 0 PRODUCT SAFETY 13 0 CONFORMITY STATEMENT D amp R ELECTRONICA WEESP BV Rijnkade 15B 1382 GS Weesp The Netherlands Phone 31 294 418014 Fax 31 294 416987 Website http www d r nl E mail info d r nl Airmix manual page 2 Page 3 Page 4 Page 7 Page 11 Page 16 Page 21 Page 32 Page 34 Page 37 Page 38 Page 39 Page 41 Page 42 1 0 Dear client Thank you for choosing the Airmix console The Airmix is designed by specialists in the field of radio broadcast and is intended to be used as an 24 hour On Air console as well as a production console We are confident that you will be using the Airmix for many years to come and wish you much success We always value suggestions from our clients and we would therefore be grateful if you could complete and return the questionnaire included at the back of this manual once you have become familiar with your Airmix We will certainly learn from your comments and very much appreciate your time doing this With kind regards Duco de Rijk PRESIDENT Airmix manual page 3 2 0 SYSTEM DESCRIPTION D amp
30. he address below Please use the reverse or additional paper if required HOW DID YOU HEAR ABOUT THE AIRMIX please circle Dealer Advertisement Exhibition Other user Other WHAT JOURNALS DO YOU TAKE ON A REGULAR BASIS PLEASE SEND TO D amp R Electronica Weesp bv Rijnkade 15B 1382 GS WEESP Airmix manual page 39 12 PRODUCT SAFETY This product is manufactured with the highest standards and is double checked in our quality control department for reliability in the HIGH VOLTAGE section CAUTION Never remove any panels or open this equipment No user servicable parts inside Equipment power supply must be grounded at all times Only use this product as described in user manual or brochure Do not operate this equipment in high humidity or expose it to water or other liquids Check the AC power supply cable to assure secure contact Have your equipment checked yearly by a qualified dealer service center Hazardous electrical shock can be avoided by carefully following the above rules EXTRA CAUTION FOR LIVE SOUND Ground all equipment using the ground pin in the AC power supply cable Never remove this pin Ground loops should be eliminated only by use of isolation transformers for all inputs and outputs Replace any blown fuse with the same type and rating only after equipment has been disconnected from AC power If problem persists return equipment to qualified service technician PLEASE READ THE FOLLOWING IN
31. he energy for small portables and car radios The signal for the mono output amp is the summed left right main output signal By means of the jumper settings it is possible to determine whether the signal comes from before or after the stereo insertion points see jumper settings Airmix manual page 25 MASTER SECTION AUX SUB The stereo auxiliary send can be used for several purposes such as driving effects such as the D amp R Qverb etc A cue switch lets you listen in stereo post master fader what has been assigned to the Aux busses SUB TO MIX When the sub switch in the channel is used to assign specific channels to this stereo buss it is possible to bring this whole subgroup into the main output by depressing this SUB TO MIX switch SUB This stereo control adjusts the overall level of the whole subgroup Output level is either OdBu or 10dbV set by jumpers if desirable A stereo cue switch assigns this signal to the CRM and the metering if the auto cue is active METER FOLLOW CRM Normal situation is left meter follows the left main output and the right meter follows the CRM When the METER FOLLOW CRM switch is activated the left meter follows the CRM as well FROM AIR This is the input select for the phones output Either the main mix is heard in the phones or the from air signal the self op switch needs to be down and the DJ channel active SELF OP When this mode is activated Phones automatically switches
32. ip signal mono Ring signal mono Sleeve ground GUEST The GUEST output is stereo and follows the input selection of From air or From sub A separate stereo headphone output is provided for a guest and the talkback is always adressed to both earphones independent of level settings The pogram material will be dimmed when the talkback is activated The output is identical to that of the announcer and could therefore be used as a second announcers output FOLLOW CRM Guest When this switch is activated it will follow the input selection of the Control Room Monitor The Guest output is on a stereo jack and wired with Tip left Ring right Sleeve ground The signal is powerful enough to drive several 600 Ohm headphones in tandem The talkback volume to the Guest output is independant from the guests level control normally the guest would listen to the main stereo program material ANNOUNCER The ANNOUNCER output is stereo and follows the input selection of From air or From sub A separate stereo headphone output is provided for the announcer and the talkback is always adressed to both earphones independent of level settings FOLLOW CRM Announcer When this switch is activated it will follow the input selection of the Control Room Monitor Airmix manual page 21 MASTER SECTION STUDIO AUTO COMM When the is active the announcer is able to listen to the talkack mic and the CUE buss at
33. ite http www d r nl E mail info d r nl Airmix manual page 41 DECLARATION OF CONFORMITY Manufacturers Name D amp R Electronica Weesp b v Manufacturers Address Rijnkade 15B 1382 GS Weesp The Netherlands declares that the product AIRMIX series conforms to the following product specifications EMC EN 55022 1987 CISPR 22 1993 class B EN 500082 1 1992 Supplementary Information The products herewith complies with the requirements of the EMC Directive 89 336 EEC 1989 as amended by the CE Marking Directive 93 68 EEC 1993 D amp R Electronica Weesp b v Rijnkade 15 B 1382 GS WEESP The Netherlands President of Engineering Airmix manual page 42 D AIRMIA SERVICE MANUAL Airmix manual page 43
34. kHz Shelve 1 kHz Bell 200 Hz Shelve Airmix manual page 17 TELCO MODULE Auxiliary The stereo auxiliary sends a post fader signal dependent upon the ON switch of the input channel signal to the master auxiliary busses The PAN control creates a stereo image in the Aux masters SUB The Sub switch switches the Telco modules output from the main output to seperate SUB mix amps located in the master section of the console This setup makes production work possible during ON AIR broadcast due to extremely good crosstalk figures achieved in the Airmix console by carefull usage of high end CAD design systems in the initial design stage of the console The Sub mix can be mixed into the main output mixbuss in the master section This is a convenient way to use the SUB assigment switch as a subgroup system creating new possibilities in the Airmix console At the same time the incoming signal from a caller is reassigned to the sub buss PAN The PAN enables positioning of the incoming caller signal The range is not restricted in order to enable to position any incoming signal anywhere in the stereo image PEAK INDICATOR The peak indicator comes on when the left or right input signals reach 4 dB from the maximum level of 22 dB CUE RING Automatic pre fade listening post pan or cue allows a caller to be heard without being in the broadcast When activating the cue switch the caller is connected to the CUE bus and listens to
35. l curve 12 dB at 60 Hz shelf Frequency response 20 20 000 Hz 0 5 dB Harmonic distortion less than 0 02 at all levels VCA s in Max gain through desk 86 dB Cross talk channel to channel 90dB at 1 kHz Noise 86 dBu one channel OdB A B line cross talk 80 dB Max output 22 dBu into 2 kOhm Headroom 422 dB above internal nominal level All control inputs are on jack sockets Channel master mike on signalling is via buffered transistors and or reed relays 24V 50mA Machine remote control is via separate reed relays for start and stop pulse or continuous signals Airmix 16 50 kg 110 Ib Conductive plastic faders VU meters extra main output meters Timer Drop though mounting 815mm width Airmix manual page 3 610mm depth 7 10 SICO REMOTE UNIT The Airmix Sico Remote unit is designed to be the communication interface between the control room and the announcer or guest It has a built in headphone amp a remote connector to be wired via a shielded stereo cable to the related Airmix channel and a very convenient CHOUGH COMMUNICATION button We shall describe all functions in detail now COUGH SIGNALLING IN MIC MODE This useful feature has two important functions 1 Cough communication 2 Mic on 1 Cough Communication A shielded stereo cable has to be connected between the Sico remote unit and the Airmix input channel that needs to be communicated to Using the push but
36. lco module it is not possible to Cue when the channel is active FADER The Airmix is fitted with a modern ultra smooth lineair fader controlling a high quality VCA and the Airmix internal logic circuitry not the audio signal This system eliminates any noise from disturbing the audio signal path When the fader is closed the signal will be automatically muted which provides excellent fader attenuation in excess of 100 dB This system also eliminates any possible crosstalk from fast winding tape recorders during broadcast Alignment of the channel With the fader closed or muted channel the Cue switch will be activated the Autocue in the master section must be activated The gain control is used to adjust the level of the incoming signal until a zero dB reading is achieved If the on switch is now activated the signal level will be nominal When the fader is opened the cue signal will be automatically reset and its associated led will switch off The cue signal can be heard in two ways 1 Through the stereo Control Room Monitors by activating the autocue switch in the master section If the Cue is activated in one of the channels the CRM and meters will be activated without interruption of the main output 2 By way of an externally connected cue amplifier with loudspeaker CONNECTORS LINE INSERT Connector type is Jack Tip signal return Ring signal send Sleeve ground Line A Input Connector type is Jack Tip
37. lways follow the main outputs NOTE The following levels should be used for a suitable sound pressure for music talkshows and interviews etc Music up to 4 dB Speech up to O dB Telephone up to 4 dB A mild compression such as 2 1 with slow attack and a threshold of 6 dB to limiting around 8 dB will improve the relationship between different broadcast material NOTE These are average settings only presentation of modern pop music will certainly require alternative settings MASTER SECTION AUX SUB AUX OUT STEREO This is a stereo output of the aux masters level is OdBu SUB OUT STEREO Stereo output jack of the subgroup output level is OdBu or 104 PHONES OUTPUT The engineers stereo headphone output can also be used as D J output NOTE DO NOT use headphones with an impedance lower than 200 Ohm 600 Ohm is preferable Airmix manual page 27 MASTER SECTION AUX SUB PHONES OUTPUT Connector type is stereo jack plug Tip left Ring right Sleeve ground NOTE Under the arm rest there is another parallel connector for connecting headphones SWITCHED CUE OUTPUT This is a stereo output of the CUE system which is switched in parallel with the CRM if it needs to be muted to prevent feedback from happening The level can be set by jumpers to be OdBu o 10dBv If only a low output is required a small 100 Ohm loudspeaker can be connected directly to the cue output MAIN OUTPUTS The Airmix contai
38. mpletely DO NOT plug the jumpers on the lower connecting pins as this will short out the positive and negative channel power supply lines to earth TELCO MODULE J19 AUX PRE POST 1 2 POST 3 4 PRE J10 AUX PRE POST 1 2 POST 3 4 PRE J17 TELCO TO TIMER 1 2 ON 3 4 OFF J20 TELCO TO MONITOR 1 2 ON 3 4 OFF J11 TELCO ON AIR 1 1 2 ON 3 4 OFF J14 TELCO ON AIR 2 1 2 ON 3 4 OFF STUDIO PCB J13 AIR IN LEFT 1 2 10dBV 3 4 0dBu J 9 AIR IN RIGHT 1 2 10dBV 3 4 0dBu J15 CUE OUT LEFT 1 2 10dBV 3 4 0dBu J16 CUE OUT RIGHT 1 2 10dBV 3 4 0dBu Airmix manual page 32 AIRMIX JUMPER SETTINGS TAPE TALKBACK PCB J 72 48VOLT DIRECTOR MIC J12 TAPE 1 2 OUT LEFT J13 TAPE 1 2 OUT RIGHT J14 STEREO OUT LEFT J15 STEREO OUT RIGHT J11 DIRECTOR TO TELCO CUE CRM PCB JUMPER SETTINGS JI3ZEXTERNAL 1 IN LEFT JI4ZEXTERNAL 1 IN RIGHT JISZEXTERNAL 2 IN LEFT J16 EXTERNAL 2 IN RIGHT J12 MONO PRE POST LEFT INSERT J11 MONO PRE POST RIGHT INSERT AUX SUB PCB JUMPER SETTINGS J7 SWITCHED CUE OUT LEFT J9 SWITCHED CUE OUT RIGHT J10 SUB OUT LEFT J11 SUB OUT RIGHT J19 CUE LED EXTERNAL Airmix manual page 33 1 2 switched 1 2 OFF 3 4 1 2 104 3 4 0dBu 1 2 104 3 4 04 1 2 10 3 4 OdBu 1 2 104 3 4 OdBu 2 3 OFF 3 4 1 2 10dBV 3 4 0dBu 1 2 10dBV 3 4 OdBu 1 2 10dBV 3 4 OdBu 1 2 10dBV 3 4 OdBu 1 2 POST 3 4 PRE 1 2 POST 3 4 1 2 l10dBV 3 4 OdBu 1
39. n The ON AIR signalling outputs 1 and 2 offer the option of driving external red light indicators in the studio Two jumpers per channel select which channel will activate the master ON AIR signalling see jumper settings REMOTE SIGNALLING IN LINE MODE In this mode Cue can be switched on off and the channel can be switched on off MIC GAIN The MIC Gain control adjusts the gain of the mic input only the range is 70 dBu to 16dBu Alignment of the MIC input With the fader in the down position and the Cue activated the input signal is adjusted with the gain control until the ZERO dB posititon of the master meter is illuminated When the fader is in its 0 dB position the signal has a nominal level in the Airmix This way of alignment will give enough margin to compensate for signal losses of up to 10 dB whilst the noise floor remains well below the nominal level Airmix Line input module This part of the triple input module is specially designed to accept balanced and unbalanced stereo input signals There are two stereo inputs line A and line B Line A has seperate fader start and stop connectors By changing jumpers the stop connector of line A will be converted to a start connector for line B R LA A As an option a stereo phono pre amp with R I A A filter curves can be plugged onto the mother board in order to accept Magnetic Dynamic phono cartridges Jumpers A number of module functions can be activated by jumper
40. ns three transformer balanced main outputs master left master right and mono All three outputs have their own line output amps with high quality output transformers The output level is 0 6 dB at 600 Ohm when the meter reads O dB Connectors are XLR male Pin 1 ground Pin 2 hot Pin 3 cold If the Airmix is required to drive unbalanced equipment Pins 1 and 3 must be shorted NOTE The mono output can have its own compressor limiter which would be particularly worthwhile when this output is used for transmitting through FM It is usual to have higher compression ratios to increase the energy for small protables and car radios The mains input is set for 230 volt 50 60 Hz The Aimix can be set to 115 volt only by qualified technicians Airmix manual page 28 AIRMIX MASTER BACKPANEL CONNECTORS MONITOR OUT STEREO MONO Type Jack GUEST OUT STEREO Type Jack ANNOUNCER OUT STEREO Type Jack TIMER CONTROL OUT Type Jack CUE OUT STEREO Type Jack FROM AIR Type Jack TAPE 1 OUT STEREO Type Jack TAPE 2 OUT STEREO Type Jack Airmix manual page 29 Level OdBu 680 Ohm Tip signal Ring signal Sleeve Ground Level 15dBu 330 Ohm Tip Left Ring Right Sleeve Ground Level 15dBu 330 Ohm Tip Left Ring Right Sleeve Ground Level ground 6V8 volt Tip Normally low active high timer start Ring Normally low active pulse timer reset Sleeve Ground Level OdBu 47 Ohm Tip Left Ring Right Sleeve Ground Level
41. ntil you are able to remove the ribbon cable from the PCBs Reverse this procedure to re mount the master section Airmix manual page 35 INSTALLING THE AIRMIX INSTALLING ALIGNMENT OF THE TELCO MODULE A Connect the telephone line with line A and a phone appliance to phone A see connector pages 1 Connect audio to the insert in return and adjust VR4 N 1 control to a minimal signal strength on test point J16 N 1 testpin NOTE This setting has already performed at the factory but can be repeated 1f needed 2 Connect a headphone to insert send and activate the telco module ON switch 3 Listen to the headphones inserted in insert send and adjust VR3 to minimum signal 4 Select with a jumper the correct Condenser for miminum signal feed through Side tone selection NOTE Repeat steps 3 and 4 several times until the maximum attenuation is achieved The hybrid is now aligned leave the R and C balance selection as selected As long as the hybrid remains connected to the same phone company no changes need to be made to this set up NOTE Try to by pass the in house telephone system if possible otherwise it will be extremely difficult to achieve a good alignment A direct connection with the incoming phone company gives the best results NOTE VERY IMPORTANT INSTALLATION OF NEW EXTRA MODULES When installing new extra modules in your Airmix it is necessary to re adjust the internal power supply voltages to
42. or the tape outputs Both tape outputs are set with one set of jumper settings FROM SUB Normally the Tape outputs are fed by the main output Depressing the from sub switch sends the sub stereo mix to the tape outputs for recording With this circuitry it is possible to record stereo sources from the channels assigned to the sub buss during broadcast Airmix manual page 22 MASTER SECTION TALKBACK This section houses all controls needed to communicate with every connected source to the Airmix Communication is one of the most important parts of a broadcast inside and outside the console We have done a great deal of thought concerning this part of the console The talkback microphone is a built in Electret microphone with its associated level control and pulse on switch The mic amp is protected against clipping and a peak detector watches over overloads The same peak detector is used to watch the directors mic input The talkback routing is latching and can be assigned to several outputs at the same time The Monitor Guest and Announcer outputs are driven post their volume controls so communication is always possible The Aux output level also controls the talk back level DIRECTOR MIC INPUT The Airmix has a seperate low noise mic input with 48volt phantom power possibility assignable to the cue system and Telco sends returns The remote connector of the Directors mic activates the directors mic to the same assignment switches
43. the same time when he hits his cough switch This set up creates a direct communication with the Director and engineer without having to ask them to use their cough talkback switches At the same it is now possibble to talk with the Telco module if its cue is activated The Announcer output is on a stereo jack and the signal is powerful enough to drive several 600 Ohm headphones in tandem The talkback volume to the Announcer output is independant from the announcers level control normally the announcer listens to the main stereo program material BACK PANEL CONNECTORS Apart from the already described monitor guest and announcer outputs there are three more outputs The Timer control output the Cue output and the from air input The TIMER output can trigger an optional timer every time a channel is activated or deactivated The CUE output gives the cue signal in stereo This is an unswitched CUE output in stereo If the D J Cue is activated the Cue will be muted FROM AIR is the stereo input for controlling the off air signal coming from a receiver This is a stereo input on jack Input sensitivity is either OdBu or 10dBV MASTER SECTION TAPE This section of the master houses the switches controlling what is going to the tape outputs FROM OSC An internal 1kHz oscillator can be assigned to the tape 1 and 2 outputs as well as the Aux output Level can be internally adjusted to read OdBu or 10dBv dependent on jumper settings f
44. the talkback mic of the engineer fader closed The Cue switch shows an incoming call by flashing hitting the CUE switch makes a connection as described above A remote switch can pick up a call by wiring the remote conector of the Telco module The ON switch works in conjunction with the fader switch 1 Red Led low intensity The channel mode is stand by 2 Red Led high intensity channel is active There are two methods of activating an incoming call A If the ON switch is pressed the red ON led will illuminate with low intensity and the caller is connected to the Telco module but not yet heard in the broadcast because the fader is still down By opening the fader the Telco module will be activated and the signal will enter the program the red led will now fully light When the fader is closed again the program signal will be muted when the fader is at its lowest position the red ON led lowers its intensity Airmix manual page 18 TELCO MODULE B When the switch is not depressed Led is illuminated even if the fader is now opened In this situation none of the signals are active but as soon as the ON switch is activated with a flashing Cue switch the caller will be direct On AIR All switching is carried out electronically with carefullly designed timing and is therefore smooth and click free If the cue function is active it will be disabled when the channel is activated NOTE In the Te
45. then by moving up the fader the signal is sent to the master and at the same time a mic on indication is sent to the cough connector The red led illuminates brightly B When the on switch is off no led is illuminated As the fader is moved upwards the channel is put into stand by and the On switch illuminates softly At this point there is no mic on signalling or audio to the master Pressing the ON switch activates the channel and the red led is illuminated brightly mic on signalling is now present In order to switch the channel and mic on signalling off the ON switch should be deactivated or the fader closed Fader The fader is an ultra smooth 100mm model controlling the internal high quality VCA s and sending on off information to the logic circuitry There is no audio going through the faders which guarantees noise free fading for ever When the fader is closed the signal is automatically muted providing a cut off in excess of 100 dB This high dB cut off value ensures that the main output is protected from crosstalk from announcers or fast spooling tape decks Airmix manual page 15 5 0 TELCO MODULE TELCO SEND This gain control adjusts outgoing levels coming from the main output or the SUB output LINE A B A B input selector When line B is selected the red led is illuminated In this mode Phone line B is activated GAIN This control adjusts incoming call levels DUCK Dims all incoming signals
46. to the main output or the eventually selected from air outputs when the D J channel is opened When self op is not activated headphones will follow the CRM PHONES LEVEL This controls the overall level of the stereo headphones output To avoid misunderstandings in stressfull situations it is not possible to fully kill the headphone signal DJ LED The DJ led lights whenever a DJ channel is active CUE RESET Depressing this large switch resets all activated Cues in all channels and masters The switch also indicates any activated cue switch in the console when Autocue is active Airmix manual page 26 BACK PANEL CONNECTORS ON THE AUX SUB BOARD On top you will see a 9 pin subD connector with the following signals voltages 1 CRM right feeds meter right 2 ground 3 External CUE led drive 4 ground 5 Mix right signal extra meter output 6 meter left feed Mix left or CRM left 7 18 volt 8 18 volt 9 Mix left signal extra meter output AIRMIX METERING In its basic version the Airmix is shipped with 37 segment high resolutionpeak reading ledbargraph meters However on request we can supply you with VU meters The Airmix has logarithmic peak reading meters with 10 m sec attack time and 1 5 sec release for every 20 dB Normally these meters follow the CRM selectors but internal jumpers can set the left meter to read the left program material at all times It is also possible to mount a second set of stereo meters to a
47. ton during broadcast the announcer can temporarily mute the microphone in order to cough where the name comes from At the same time his microphone will be routed to the cue system in order to give him the opportunity to communicate with the engineer producer 2 Mic on When the channel is active a voltage is applied between Tip and Sleeve OV which can be used to activate a led red in this case the internal led of the SiCo remote unit It can also be used to activate an externally connected lamp 18 Volt 20mA but resistor R123 needs to be replaced Contact your dealer for additional information In addition to the localized mic on signaling there is also a master signal in the master section The ON AIR signaling outputs 1 and 2 offer the option of driving external red light indicators in the studio Two jumpers per channel select which channel will activate the master ON AIR signaling see jumper settings page 32 The input jack of the Sico Remote unit needs to be wired to the master of the Airmix Guest or Announcer outputs or whatever suits your purpose mostly The output jack is a parallel jack to the input jack to simplify wiring to more than one SiCo remote unit in the presentation room Airmix manual page 38 11 AIRMIX USER QUESTIONNAIRE Dear Airmix user We care very much about your opinion of our product and would very much appreciate if you could complete the following questionnaire and return it to t
48. when outgoing signals are pesent HIGHPASS Fixed low frequency roll off LOWPASS Fixed high frequency roll off HIGH MID LOW only availale as an option AUX Transmit a signal to the aux master post fader The channel on switch also affects the aux send SUB Assigns input signal to seperate SUBmaster PAN Allows adjustment between the left and right channel outputs PEAK The peak indicator will indicate when the signal reaches 4dB below the clipping point of the module CUE pre fade listening Allows pre fade listening of the channel and taking an incoming call with the fader closed The cue function is automatically disabled when the channel is activated ON Channel on off switch While in closed fader stand by mode i e when red led is half illuminated incoming calls can be connected by pressing the ON switch red fully lights FADER Channel VCA volume control adjusts overall channel level Airmix manual page 16 TELCO MODULE Airmix TELCO input module This input module is specially designed to accept a maximum of two telephone lines An internal telephone hybrid circuit simplifies connection of telephone lines and phone appliances There are two inputs line A and line B Line A is internally connected to PHONE A and Line B is internally connected to PHONE B the start and stop connectors of the triple input modules When the internal relays are not active both phone lines can be used as norm
49. yout Most all of the switches have led indicators large illuminated CUE and ON switches and the front panels are angled for visibility All similar functions in the triple input channels are grouped and colour coded with additional fader knobs available for personalised channel colour coding Example Microphone channels red fader knobs Telephone channels grey fader knobs Stereo channels black fader knobs Radio communication On the basis that there is no radio without communication the Airmix has extensive possibilities for signalling and communications Every microphone channel has its own signalling and talkback circuitry and all outputs can also be connected to the talkback circuitry The announcer technician producer director can communicate with the announcer booth guests monitoring system all connected Telco modules auxilliaries either individually or in any combination A very intelligent Cue system connects every activated Cue switch with each other to create a transparant and intuitive communication system It will be explained in detail further in this manual Signalling It is extremely important in broadcast to know whether a microphone channel is active Every channel has a red light signalling available on the remote connector The Airmix has two external connections for ON AIR signalling to control an external relay activating high voltage ON AIR lamps NEVER CONNECT 115 230 VOLT LAMPS DIRECTLY TO THE
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