AM 41443
Contents
1. OOO O Master If the device is in the transition status and a Master already exists in the chain it receives an ID number and the green LED indicates that the device is a Slave unit 3 LED O O O O Slave Once the power ON sequence is terminated the normal display for a Slave unit is as indicated in the picture O O O O O Power ON 5 3 LED FOR STATUS CHANNEL INDICATION In the 3 2 section we mention the role of the bicolor LEDs of the channels 6 par 2 3 These indicators have a multiple role and depending on the setting and programming quattroitalia s r l 35020 ALBIGNASEGO PD ITALY V delle Industrie 38 21 Tel 39 049 862 6724 Fax 39 049 862 6440 E mail info omnya com internet www omnya com The LED has 2 colors Green Red The Green color indicates that the channel is activated open If the mixer is in Manual mode this LED is always on In presence of a channel saturation it changes its color to Red If the LIMITER function is activated the Red lighting indicates that the attenuation against the saturation is ON Short Red flashes every 10 seconds indicate which are the channels blocked by the external control 5 4 THE DEFAULT SETTINGS In the following table are reported the settings and values of the parameters used as factory defaults It is possible to recall these settings and consequently the proper functionality of the device through the action on the reset switch or on the exter2. A 6 ORG A 7 NOISE GATE A8 LIMITER quattroitalia s r l 35020 ALBIGNASEGO PD ITALY V delle Industrie 38 Tel 39 049 862 6724 Fax 39 049 862 6440 E mail info omnya com internet www omnya com 1 FOREWORD 1 1 THANKS Congratulations You have chosen an Omnya brand product The automatic mixer and preamplifier AM41443 is a high technology device engineered to solve numberless problems with an incredibly easy use We hope you will be completely satisfied with this product s features 1 2 THE AUTOMATIC MIXER When installing a P A system where loudspeakers and microphones are located in the same room two contrasting requirements need to be met an adequate sound level has to be achieved to ensure intelligibility but feedback must not be triggered Problems come up especially when several microphones are used as the installer has to adjust each of them to the required sensitivity when in use However when all the microphones are on overall sensitivity increases significantly as well by 3 dB each time the number of microphones doubles We thus have 3dB when going from one to two microphones 6dB from two to four 9dB from four to eight The sensitivity increase easily moves the system into the feedback triggering zone and the overall gain has to be reduced to move back into the safe zone This way however each individual microphone no longer has its optimum sensitivity In general the final setting is a possibly poor compromis
3. below e he power supply is sufficient for up to 3 additional AM41443 units The connection is directional for this reason there is an Input and an Output connector The pins configuration is as indicated PIN INput Connector OUTput Connector 1 DATA DATA 2 DATA DATA 3 D_GND D GND Not connected Internal option for connecting 4 24V LINK 24V LINK 5 GND LINK GND LINK 6 AUDIO IN AUDIO OUT 7 AUDIO IN AUDIO IOUT 8 AUDIO_SHIELD ground audio AUDIO SHIELD ground audio shield shield preferably to be unconnected with a custom cable in the case of long lines IMPORTANT The daisy chain connection is directional in fact the double RJ45 20 par 2 4 has one section qualified as IN lower connector and one section qualified as OUT upper connector For the appropriate audio signal connection a cable has to be connected from the OUT to the IN of the next device It is possible to define as first device of the chain the one with no connection cables on the IN connector It is possible to define as last device of the chain the one with the free OUT connector There are no limitations on the position of the Master device in respect to the slaves Nevertheless if we want the Master unit to have the sum of all the channels it must be connected as the last device of the chain NB With the use of the RJ45 outputs the AM41443 provides the output of partial mixed signals along the line For examp
4. connection see software user s manual for the control of AM41443 It is important to remember that the settings activated from the front panel prevail on the ones given from an external control 3 2 MICROPHONE CHANNEL It includes the balanced input low noise preamplifier with selectable sensitivity control and high pass filter The microphone input features a XLR 3F connector codified as follows PIN 1 MAINS PIN 2 hot PIN 3 cold Next to the XLR connector there is a 4 position DIP Switch 26 par 2 4 The three sections on the right control the gain following the scheme in the picture quattroitalia s r l 35020 ALBIGNASEGO PD ITALY V delle Industrie 38 9 Tel 39 049 862 6724 Fax 39 049 862 6440 E mail info omnya com internet www omnya com 40dB The gains increase lowering the switches from right to left as shown here above and on the device rear panel HIGH PASS FILTER HIGH PASS FILTER ON 100HZ FLAT flat up to 10 Hz The first section on the left is for the activation of the high pass filter This filter is activated as in the above scheme The installer must necessarily know the exact sensitivity of the installed microphones in order to assign the correct gain to each input The green LED par 2 3 placed on the front panel under every volume control lights up when a channel is activated When the light goes out the channel is being deactivated In case of short pauses th
5. delle Industrie 38 17 Tel 39 049 862 6724 Fax 39 049 862 6440 E mail info omnya com internet www omnya com 4 1 MANUAL The AM41443 can be installed and used as a simple analog manual mixer The selection made on the first section of the dipswitch on the front panel 10 par 2 3 conditions the functional modality The manual modality selector on the high position allows the control of the various channels and the master as in a normal mixer All the microphones are open at the same time because some of the logic functions are not active For the other selections see cpt 3 1 A manual mixer can be controlled remotely 4 2 MIXER STAND ALONE The AM41443 can be installed and used as an automatic mixer fully working on the base of the factory default parameters This modality is activated through the selection made on the first section of the dipswitch on the front panel 10 par 2 3 this selector is on the low position default The volume control is made with the potentiometers on the frontal panel the logic takes care of the automatic activation of the microphones relevant for the correct mixing of the signals Some variations of the default parameters are available on board cfr cpt 3 1 4 3 DAISY CHAINED MIXER The functional modality as a mixer can be extended to other units that can be connected through the daisy chain port 20 par 2 4 A series of mixers up to 24 units can be connected in order to create a large virt
6. follow these suggestions Connect the microphones respecting the sign of the signals Use high quality microphone cables Do not install microphone lines parallel to the electrical line Keep a minimum distance of 30 cm Install microphone inputs lines far from the loudspeakers lines Once the microphones have been settled in their positions install the loudspeakers in a way that they will not light the microphones directly to avoid any acoustic reaction Larsen effect Close the AMB dipswitch only on the channels connected to a microphone quattroitalia s r l 35020 ALBIGNASEGO PD ITALY V delle Industrie 38 25 Tel 39 049 862 6724 Fax 39 049 862 6440 E mail info omnya com internet www omnya com 7 AUTOMIXER USES 7 1 CHURCH In most cases the best function to be used is LAST ON If on the contrary a specific microphone must be opened while all the others are disabled the ONE ON function must be activated see Appendix A 2 In this case we recommend to connect the altar microphone to input no 1 or at least at the Master unit activating automatically while the other microphones are closed If a large number of microphones is installed the installer might find useful also to limit the number of the microphones open at the same time through the LOM function One important feature is the NOMA as explained in Appendix A 5 this circuit keeps a constant output level when the number of open microphones changes This feature is
7. global quality of an audio chain is indeed determined by its worse component 6 1 MECHANICAL INSTALLATION The AM41443 can be either mounted on a 19 rack with a set of 2 brackets and 4 screws or put on a horizontal surface Like all the devices studied for the signals processing it is advisable to install the AM41443 far from hot sources as for example power units and from devices generating magnetic fields or radiocontrolled which may cause instability of the logic functions 6 2 ELECTRICAL CONNECTION The AM41443 is fed through a 24VDC 5W nominal power source even though the possible supply range is between12 and 48VDC 5W The automixer is released with a power supply adapter for the connection to the electrical mains for a continuous use This supply can give power up to 3 additional devices 4 mixer chain through a daisy chain connector 20 though in this case a more powerful supply has to be used N B Using a power supply lower than 18VDC there is a reduction of the IN OUT dynamic quattroitalia s r l 35020 ALBIGNASEGO PD ITALY V delle Industrie 38 24 Tel 39 049 862 6724 Fax 39 049 862 6440 E mail info omnya com internet www omnya com 6 3 GROUND LOOP The AM41443 is a device with a double isolation The electronic circuitry is floating and this helps reducing the production of ground loops 6 4 MICROPHONE LINES Particular attention must be given to the microphone connections It is indispensable to
8. if set low every unwanted sound picked up by the microphone will open the channel if set too high the first syllable of the speech will be lost What is needed is a threshold voltage that automatically follows the ambient noise Such is the circuit used by the Automixer where the sum of the signals picked up by all microphones connected to it is processed to produce the reference threshold signal that represents the ambient noise This way what actually turns the channel on is the difference between the direct sound and the background or ambient sound The managing of the functions dedicated to an automatic mixer can be various and different The AM41443 is an analog mixer based on a digital control and even if it has a predefined control mechanism it is open for future implementation of alternative models for the microphone controls The AM41443 features 4 variable gain microphone inputs phantom power is given to all microphones at the same time through a front panel switch quattroitalia s r l 35020 ALBIGNASEGO PD ITALY V delle Industrie 38 4 Tel 39 049 862 6724 Fax 39 049 862 6440 E mail info omnya com internet www omnya com 2 1 BLOCK DIAGRAM AND DESCRIPTION As shown in the picture the AM41443 mixer can be used in very different situations thanks to its particular features As already said in the description this automatic mixer is a digital controlled analog device This means that AM41443 can conceive a very high aud
9. mixers as well The connection is always made to the USB of the Master e External control through the RS232 for Crestron AMX and similar controls This modality is typically indicated for the integration in applications with automation systems quattroitalia s r l 35020 ALBIGNASEGO PD ITALY V delle Industrie 38 18 Tel 39 049 862 6724 Fax 39 049 862 6440 E mail info omnya com internet www omnya com e Continuous external proprietary control realized through a controller connected to the RS485 port with the daisy chain connector This modality can be used in case of an external control of the system with a large data stream to be controlled The external control is possible connecting to the Master 4 5 MASTER AND SLAVES In a system consisting of more than one mixing unit we must consider the concept of Master and Slave One of the devices must take the control to coordinate the operations This device is commonly defined Master it receives commands from the external world and processes the information to be sent to the other devices of the system The Slave on the contrary is the device that connected in the chain contributes with its information to the decisions carried out by the Master and applies the commands of its competence This hierarchy requires each device to be assigned an ID number To simplify the procedure of creating the chain the AM41443 has a function providing the easy assignment of the Ids to the various de
10. particularly useful in low reverberation ambients but it can also happen that the high reverberation in a church causes the activation of another microphone channel when only one is already open A higher level of the THR MIN value can limit this effect but the feedback is unavoidable if there are loudspeakers installed near the microphones With two open microphones the NOM feature decreases the output of 3dB Since there is no one talking in the second microphone the resulting effect is an unwanted and unpleasant decrease of the output level To avoid this inconvenience we suggest that the NOM dip switch in the microphone channels picking up the reverberation or even on the total number of microphone channels if they are reachable by the reverberation is not closed In any case this modification does not create any problem since most of the time is only one person speaking at a time Even if two people talked or sang simultaneously the volume increase would certainly be acceptable 7 2 CONFERENCE ROOMS This installation usually requires a certain number of seats for delegates and a seat for the president In this case the use of the LOM function can be the best solution limiting the number of simultaneously open microphones to 2 or 3 Besides it will be necessary to use the PRIO function to give priority of speech to the president going over the delegates priority when needed 7 3 VIDEOCONFERENCING The use of an automatic mixer toge
11. same time If more devices are connected to a system this control is propagating along the chain If we indicate a number N allowed to be active during the session that same number will be considered by the system it may happen that only transitorily in the opening phase more than N microphones will be activated but in a very short time the exceeding number will be silenced according to the hierarchy related to N Setting only one allowed channel is the equivalent of the FILIBUSTER or ONLY ONE When a speaker is taking his speech his channel will be activated only if all the others are closed only one channel can be activated at a time Only when the speaker finishes his speech another one can start A 5 NOMA NUMBER OF OPEN MICROPHONES It represents the attenuation of the output signal based on the number of the active microphones Not necessarily all the microphones participate to the computation of the general attenuation it is possible to unselect some microphones through the use of external control with the PC This function allows a certain control on the output level which can remain constant even if the number of open microphones increases The classic attenuation for not correlated signal is 3dB for each doubling of the microphones activated This is the default value used for the AM41443 With the external control the procedure of this attenuation rule can be changed to any value to modify the attenuation according to the
12. OMN YA AM 41443 AUTOMIXER PREAMPLIFIER User s Manual Rel 1 01 24 09 2007 quattroitalia s r l 35020 ALBIGNASEGO PD ITALY V delle Industrie 38 Tel 39 049 862 6724 Fax 39 049 862 6440 E mail info omnya com internet www omnya com SUMMARY 1 FOREWORD 1 1 Thanks 1 2 The automatic mixer preamplifier 1 3 The package contains 2 DESCRIPTION 2 1 Block diagram and description 2 2 Front panel of AM41443 2 3 Rear panel of AM41443 3 THE CIRCUIT 3 1 Front panel switch 3 2 Microphone channel 3 3 Tone controls 3 4 Master balanced output 3 5 Auxiliary balanced output 3 6 USB control port 3 7 RS232 control port 3 8 Daisy Chain connectors and RS485 port 3 9 Internal selections 4 OPERATING MODES 4 1 Manual 4 2 Mixer Stand alone 4 3 Mixer Daisy Chained 4 4 Programming and controlling 4 5 Master and Slave 5 PROGRAMMING 5 1 Reset 5 2 Indications from the VU meter 5 3 LED for status channel indication 5 4 Default settings 5 5 Behaviour with the manual selections 6 INSTALLATION 6 1 Mechanical installation 6 2 Plugging into the mains 6 3 Ground loop 6 4 Microphone lines 7 USING THE AUTOMIXER 7 1 Church setup 7 2 Conference room setup 7 3 Videoconferencing setup 7 4 Broadcast uses 8 TECHNICAL CHARACTERISTICS AND PERFORMANCES 8 1 List of the controls available for remote control 8 2 Technical Data APPENDIX OPERATING FUNCTIONS A 1 AMB THR A 2 Last On A 3 One On A4 LOM A 5 NOM
13. ce to an output only the output between pin 2 and pin 1 can be used leaving pin 3 disconnected This unbalanced signal level has a 6dBu level The XLR 3M output connector links 22 par 2 4 are PIN 1 mains PIN 2 hot PIN 3 cold quattroitalia s r l 35020 ALBIGNASEGO PD ITALY V delle Industrie 38 11 Tel 39 049 862 6724 Fax 39 049 862 6440 E mail info omnya com internet www omnya com 3 5 AUXILIARY BALANCED OUTPUT A second balanced output is available through the double RCA connector 21 par 2 4 working with an auxiliary control level on the front panel 1 par 2 3 This auxiliary output is nevertheless controlled by the Master volume control 2 par 2 3 but the level control 1 par 2 3 allows superimposing a 16 dB On the upper RCA connector there is an in phase signal on the lower RCA connector the anti phase signal These two signals form a balanced signal connectable with an XLR connector This additional output is useful to set a different route of the input signals it gives also the possibility to exploit the split channels and tone control functions to reinforce different areas of the sound system or for different uses such as radio or television broadcasts with the use of ambience technique 3 6 USB CONTROL PORT The connector placed on the right side of the front panel 7 par 2 3 is for USB connections with a personal computer The control software is provided with the AM41443 Updates are a
14. e with the significant drawback that especially in a reverberating environment any microphone that is open and not engaged picks up and feeds reverberated sound into the system even when feedback is not triggered the returning sound tail blurs the direct sound AM41443 belongs to a new generation of automatic mixers under the OMNYA brand It is a small mixer working both manually and automatically with a total modularity that avoids real limits to the number of channels This also means that more AM41443s can be installed locally or in different places and controlled through a PC connection or a remote control panel It can work as manual or automatic stand alone or through a USB port controlled mode The AM41443 main characteristic is that the audio signal is analog The high quality microphone front end maintains a very low distortion and a maximum signal noise ratio With its 20dB headroom it guarantees a perfect result in any condition This automatic mixer is produced in a 1 2 rack unit metallic box A powerful microcontroller manages the control functions the internal functions the network supervision and the links with the panel or the controlling PC The AM41443 has 3 independent balanced outputs The main output works through a volume control on the front panel The second output also having a trimmer volume control can serve a separate group of amplification devices The third output can create a chain of several automatic mixers
15. e led stays on due to the HOLD circuit When this LED lights up in RED colour it indicates the channel is saturated If the LIMITER function is activated this LED indicates that the limiting function is active on the signal to avoid the saturation quattroitalia s r l 35020 ALBIGNASEGO PD ITALY V delle Industrie 38 10 Tel 39 049 862 6724 Fax 39 049 862 6440 E mail info omnya com internet www omnya com 3 3 TONE CONTROLS Normally deactivated default Internal setting see sect 3 9 Some tone controls on the front panels are reachable by means of a screwdriver These filters have been put to limit actions on the low medium and high spectrum components in order to obtain a general adjustment of the output signal The minimum and maximum output signal excursion through these controls is shown in the picture below AUDIO PRECISION amp AMPL dBr us FREQ Hz 20 DEC 196 12 10 3 LUE LE NI Li LL UO LUNI LE ELT PRIL te see Maximum emphasis and attenuations 10dB e LOW PASS 20Hz e MID BAND 1250Hz e HIGHT PASS 20kHz Tone controls can be active on the Master main output or on the auxiliary output separately or on both depending on the position of the selectors inside the device see section 3 9 3 4 MASTER BALANCED OUTPUT This output is electronically balanced It is necessary to remember that when the Vumeter shows OdB the balanced output level is 12dBu When connecting an unbalanced input devi
16. e max number of channels open all or from 1 to 9 ORG this function kills the selected microphones when the assigned channel goes active ONLY ONE o Filibuster activates only one channel ATTENUATION attenuation level when the channel is closed non active HOLD time given to a single channel under threshold before closing LIMIT GENERAL limiter activated on the master level NOISE GATE activated below a given level VOLUME MASTER WITH the setting of a min and max limit for the use with control panel VOLUME channel Auxiliary Volume for the AUX2 output 16dB 16dB respect to the Master level With the external control from a PC or from a panel the front knobs of the AM41443 can be disabled There are two levels for the remote controls Installer User User without PW Installer needs a PW to gain free access to all parameters 8 2 TECHNICAL DATA INPUT 4 on XLRF balanced 60 40 20 0dBu 14Kohm INPUT auxiliary on RCA jack 0dBu 10Kohm OUTPUT 1 XLRM balanced with Master level control on back panel 1 balanced on double RCA connector with trim level control on back panel 1 balanced on daisy link shielded RJ45 with proprietary connection used also for partial outputs OUTPUT LEVEL up to 26dBu with nominal 24VDC power supply Connections USB b on front panel for the control with a PC RS485 on daisy chain for proprietary external panel RS232 for Crestron AMX like external control Controls on front panel Volume for the single chan
17. e mixer s output level at its preset value when the number of open microphone channels changes see NOM App A 5 Besides the following functions are also available e LAST ON last activated microphone remains open even if the speaker is silent until a new microphone is activated LOM The number of open microphones can be limited from 1 to 4 for the single device from 1 to N for linked devices e ONE ON Microphone channel 1 is activated when any other microphone receives a signal PRIO one microphone channel has the priority over the other microphones ORG a chosen channel forces the closing of other channels which were qualified for this function e OVR A channel can be forced open Other AM41443 features are indicated in sections 8 1 8 2 The logic controlling this device is undoubtedly its fundamental and most important characteristic The AM41443 is basically a mixer with a VCA on each microphone channel that turns the microphone on and off Normally off the gate goes on as soon as someone begins speaking at the relevant microphone One of the most important problems for an Automixer is the circuit used to turn the channel on or off To attain this result the incoming voice signal must be compared to a reference or threshold signal The easiest way is the use of a fixed threshold as in a simple gate the threshold voltage may actually be adjusted manually but remains fixed during operation A fixed threshold does not work
18. en active on the MASTER unit in Automixer mode When the Limiter is acting the volumes of the 4 channels in the Master unit decrease like all the channels of all the devices downstream The Limiter intervention follows the level of the general mixed signal on the Master main output this signal is made up of the 4 on board channels signals and of all the channels downstream The Master main output is called Master Out LIMITER behaviour when active on the MASTER unit in Manual mode Comportamento Option not recommended LIMITER behaviour when active on a Slave unit in Automixer or Manual mode When the Limiter is acting the volumes of the 4 local channels in the Slave unit decrease The action does not spread either to the devices upstream or to the ones downstream The local Limiter intervention follows the mixed signal on its main output being thus influenced by the signals coming from all the slave units downstream In short the Limiter intervention is caused by the mixed signal of the 4 local channels and of all channels downstream but the volume limitation acts only on the 4 local channels 6 INSTALLATION The AM41443 is a high quality automatic mixer giving excellent results To obtain the best performance it has to work in a system consisting of high level devices While an operating automixer doesn t menace the good quality of the audio signal it cannot solve the audio problems arising from the devices working before or after it The
19. en the reinforcement system is made with a number of distributed loudspeakers it could be useful to reduce the floor noise in absence of speakers It is possible to activate a noise gate reducing the general levels when the levels are below a given threshold The difference in respect to the automatic mixer functions is that in manual all the microphones are closed or open at the same time and normally the noise gate threshold is lower than that used for the automatic mixing since it has to reduce only the electronic noise appearing in the absence of useful signals A8 LIMITER It avoids the signal saturation The activation threshold is controlled by PC The default value on the devices is set to OdBu on balanced output quattroitalia s r l 35020 ALBIGNASEGO PD ITALY V delle Industrie 38 30 Tel 39 049 862 6724 Fax 39 049 862 6440 E mail info omnya com internet www omnya com ATTACHMENT 1 CONVENTION AND HIERARCHIES The convention defining the chained devices is shown as follows o OMNYA p A H Oris To DIO e A UPSTREAM On me ROLE regina SLAVE 1 pane E ______ LEE eleleleen DOWNSTREAM e lat MASTER e VU METER DISPLAY The local VU METER of all the devices indicates the level of the signal audio sum of all the devices upstream its own audio signals For example Slave 3 VU METER indicates the sum of SLAVE 1 2 3 audio signals The Master unit sums up all the chain audio
20. hm considering the single signals of the channels in the system For a number of reasons it could be necessary to exclude some of these channels from the computation of the parameters necessary for the activation of the microphones This selection specific for each channel is defined AMB ient The activation of a new channel is decided as a function of many parameters such the energy inside a defined spectra of frequencies the speed of this variation and much more A parameter that can contribute to change the sensitivity of the algorithm for the activation is called THR threshold This parameter can be modified in order to adapt the behavior of the automatic mixing as a function of different needs for the installation A 2 LAST ON The selection of this function leaves the last channel used open even if no one is speaking If two or more microphones were active at the same time they will remain open if the two or more speakers stop synchronously As soon as the next speaker starts its channel opens and the other remained active by the effect of the LAST ON will be closed A 3 ONE ON This function can be used for the same purpose as the Last ON The difference is that the channel indicated by the selection will be activated automatically when no other channels are open This channel can be selected by the use of the external control A 4 LOM LIMIT OF THE OPEN MICROPHONES This function limits the number of the channels activated at the
21. ically 3 modes Activation time Behavior The device quits the external mode It gives the control back lt 1 5s to the local volumes potentiometers on the front panel 5 par 2 3 Master in the chain gt 1 55 e lt 108 e Loads default values on the single device e Erasesthe table of the slaves e Enters the transition mode no master no slave e lfinthe chain a Master already exists the device under reset after a few seconds becomes a Slave and receives the ID sequential number from the Master Master alone e Loads default values e Erasesthe table of the slaves e Enters the transition mode no master no slave After some seconds not being in a chain elects him to Master status Slave in the chain e Loses the ID e If in external mode it maintains the status Slave alone e Loads default e Enters the transition mode no master no slave e Losesthe external status if present After about 10 seconds not being connected to a chain it elects itself as a Master Pressing the reset switch It resets the device and activates the bootloader status This longer then 10s procedure allows to clean the device of all the changes loading the factory configurations Moreover it is ready to accept a new firmware through the USB port firmware gt 10s update Once the red LED is stable maintain pressed the switch for 2 more seconds IMPORTANT The reset switch is operative only in as
22. installation needs quattroitalia s r l 35020 ALBIGNASEGO PD ITALY V delle Industrie 38 29 Tel 39 049 862 6724 Fax 39 049 862 6440 E mail info omnya com internet www omnya com Number of microphones activated 1 2 3 4 5 6 7 8 0dB 3dB 4 8dB 6dB 7dB 7 8dB 8 5dB 9dB Output attenuation dB In the table we indicate an example of the attenuation scale based on 3dB doubling A6 ORGAN In some installations it may be necessary to inhibit the activation of some microphones in the presence of some acoustical situations For example in a romanic or gothic church with the organ placed behind the altar the produced sound may activate some microphones If it is necessary to avoid this behavior it is possible to activate the ORG function that selectively inhibits some of the microphones With the AM41443 it is possible to select which microphone will act as a killer and the channels we need to kill In the AM41443 also the channels needing to be killed with the ORG function can be selected with external control The attenuation of the microphone channels can be modified as desired The default value is 20dB The channel dedicated as a killer is not mixed with the others and is used only as service channel When the organ channel is below the threshold the automatic mixer acts with the normal functions A7 NOISE GATE In the manual configuration all the channels used are normally open Wh
23. io purity and has the advantage to allow both a local and a remote control on the main functions Also other processes as the channels opening can be automated following MAIN OUT ce DEE The input section has 4 variable sensitivity inputs and processes signals from 60 dB to line level memen These inputs can be divided into 2 blocks of 2 inn channels each to control separately locally or i i remotely the mixing of a number of channels In this manner for example we can mix on the auxiliary output all 4 channels while we send only two of them to the general mixing This function could be useful in situations in which a service need ambience signals for a radio broadcast while the preserved signals without the ambience are sent to the local reinforcement system A tone correction feature can be used before the master or the auxiliary output The daisy chain connection of more AM41443 up to 24 devices can be linked is obtained through a RJ45 connector This connection allows the link between the units of the digital line for the control information on the chain and the analog signals producing the mixed program The audio signals are directional DAISY LINK INPUT LI DAISY LINK OUTPUT mic une BALANCED OUT 2 PROFESSIONAL BALANCED LINE MIC INPUT GAIN O 20 40 60 db ON FLY PROGRAMMING PORT E pu CONTROLLER COMPUTER LINK E CONTROL amp PROGRAMMING quattroita
24. le The 1 device has the mixed channels on the local outputs The 2 device has the sum of its channels plus those of the previous device etc on the local outputs The last device generally the Master unit has the mixing of all the channels of the chain Taking into account that all the devices have a local auxiliary volume control semi independent from the Master it is possible to have partial outputs for specific needs Creative use it is possible to use the digital control on all the chain of devices creating different mixing blocks It is possible to break the audio chain using a formally wrong connection of the daisy chain cable In fact connecting one OUT to one OUT or one IN to one IN the digital communication is maintained but the audio signal stops at the desired level giving access to single devices or different mixing groups The Master level will act on all the groups quattroitalia s r l 35020 ALBIGNASEGO PD ITALY V delle Industrie 38 13 Tel 39 049 862 6724 Fax 39 049 862 6440 E mail info omnya com internet www omnya com 3 9 INTERNAL SELECTIONS Inside the AM41443 there is a series of selections The picture here below indicates the position of the selectors associated with the functions e SPLIT Channel splitting e GAIN Gain e FILTER Filters bypass Each function has two selectors A B allowing different combinations The selection of the sections must be operated according to the tables here reported tha
25. lia s r 35020 ALBIGNASEGO PD ITALY V delle Industrie 38 5 Tel 39 049 862 6724 Fax 39 049 862 6440 E mail info omnya com internet www omnya com 2 2 AM41443 FRONT PANEL 3 Low medium high tone control 6 ON LED 9 Reset button AUX2 Auxiliary volume output 2 Master volume VU meter and configuration signal 5 Microphone input level 1 4 USB connection for remote PC control 8 External control LED 0 1 4 7 10 Mode and function selection switch quattroitalia s r l 35020 ALBIGNASEGO PD ITALY V delle Industrie 38 Tel 39 049 862 6724 Fax 39 049 862 6440 E mail info omnya com internet www omnya com 2 3 AM41443 REAR PANEL Ast CC EL E quattroltalla ul MADE IN ITALY ALBIGNASEGO PADOVA ITALY CE 20 DAISY CHAIN connector 21 RCA auxiliary output 22 Master output 23 RS232 port 24 DC power supply 25 MICRO LINE inputs 26 Sensitivity filter switch quattroitalia s r 1 35020 ALBIGNASEGO PD ITALY V delle Industrie 38 Tel 39 049 862 6724 Fax 39 049 862 6440 E mail info omnya com internet www omnya com 3 THE CIRCUIT AM41443 is a complete automixer preamplifier that can drive one or more power amplifiers Main features 4 variable sensitivity microphone inputs with 48V phantom power and selectable high pass filter see 3 1 3 2 General tone control see 3 3 Balanced master output on XLRm connector see 3 4 Balanced auxiliary output on RCA connectors see 3 5 USB con
26. nal control All these values are based on the needs of the average installations It is activated by frontal Dip switch on the device when in MANUAL and controlled from PC STATUS DESCRIPTION VALUE possible COMMAND interval THR OFFSET Threshold for the channels activation 40 Itis an arbitrary quantity added to the adaptive level 0 100 Controlled from PC ATTENUATION Level assigned for the attenuation of the channels when killed 18dB by the ORGAN function 0 85 dB Controlled from PC HOLD TIME Residual time in which a channel under the threshold is still 1500 msec maintained 0 5000msec Controlled from PC MUTE Level of attenuation when the MUTE is activated 40dB The function is deactivated as default 0 100 dB OFF Controlled from PC and remote panel NOMA It defines the attenuation level for each doubling of the 1 7 dB channels active 0 40 dB ON This function is activated on all the 4 channels step 0 3 dB It is deactivated from PC LIMITER_THR It defines the level at which the Limiter acts 0 dBu This function is deactivated as default 24 24 dB OFF It is activated by frontal Dip switch on the device and BALANCED OUT controlled from PC NOISE GATE THR Itdefines the level at which the channel is silenced 36 This function is deactivated as default 0 100 OFF ORGAN DETECT It defines the channel operating as killer when above the THRESHOLD 60 thresh
27. nels Master Volume Volume of the auxiliary output with separate trim control Tone control with 3 frequency bands LED indicating the connection of a PC or an external panel LED activation status of the channels VUmeter with 5 LEDs and one ON LED RESET pushbutton quattroitalia s r l 35020 ALBIGNASEGO PD ITALY V delle Industrie 38 27 Tel 39 049 862 6724 Fax 39 049 862 6440 E mail info omnya com internet www omnya com DIP SWITCH with 5 sections to control the functions Automix Manualmix Priority Ch1 or Noise gate Last ON or compander Limiter Phantom ON 4 inputs Controls on rear panel DIP SWITCH on each input channel for sensitivity selection plus HP filter RJ45 CONNECTTOR for data in the daisy chain configuration Mini stereo jack 3 5mm for RS232 Frequency response 10 50 KHz with possible reduction THD lt 0 01 S N 96dB Box metallic 1 2 rack Dimensions 44x210x165 Weigh 1140gr The AM41443 complies with the current safety standards EN60065 EN50081 1 EN50082 1 The device has the CE seal as required by 89 336 CEE 24 09 07 quattroitalia s r l 35020 ALBIGNASEGO PD ITALY V delle Industrie 38 28 Tel 39 049 862 6724 Fax 39 049 862 6440 E mail info omnya com internet www omnya com APPENDIX OPERATING FUNCTIONS A 1 AMB THR The heart of the AM41443 is the automatic mechanism for the activation opening of the microphone channels The decision for the activation happens as a function of an algorit
28. old It defines also the threshold level and the attenuation operated on the selected channels ATTENUAT 20Db This function is deactivated as default on all the channels Controlled from PC It defines the activation level for any single LED of the VU 36dBu 12dBu VU METER meter It activates the VU meters 6dBu 0dBu 3dBu This function is activated as default referred to ON Controlled from PC BALANCED OUT All other functions are de activated quattroitalia s r l 35020 ALBIGNASEGO PD ITALY V delle Industrie 38 22 Tel 39 049 862 6724 Fax 39 049 862 6440 E mail info omnya com internet www omnya com 5 5 MANUAL SELECTIONS BEHAVIOUR IN A CHAIN OF DEVICES The selector on the fornt panel of AM41443 activates a number of functions independently from the system configuration Indeed these adjustments have priority on those made through software The aim of this paragraph is to show the behaviour of the devices when different functions are activated and their relationship within a chain connection To evaluate this behaviour we must first define the term convention the mixing of an audio signal moves toward the Master while the control signals move in the opposite direction To better understand this statement see att no 1 e 1 switch left Automixer Manual This option is present and selectable both on the Master and on the slaves The use of the Manual option on the Master is not recommended The meaning of the follo
29. ons will be the subject of an application note separated from this manual GAIN Gain for the Master Output With the indicated selectors it is possible to modify the level of the Master output 22 par 2 4 There are 2 levels as indicated in the table quattroitalia s r l 35020 ALBIGNASEGO PD ITALY V delle Industrie 38 15 Tel 39 049 862 6724 Fax 39 049 862 6440 E mail info omnya com internet www omnya com A La OI p La Gain 12dB Default selection A ET CIO S ET mi Gain 6dB Note the A and B selectors must be in the same position FILTER These selectors enable the insertion of a three band filter on the desired outputs It is possible to select among the following configurations A LEO Co p Lio DEFAULT MASTER 22 par 2 4 and OUT2 21 par 2 4 outputs are in Flat This is the default configuration released by the manufacturer A EL CIO S ET i MASTER and OUT 2 outputs are served by the tone control a DI ET i MASTER output is in Flat OUT2 output is served by the tone control AE C giai O OUT2 output is in Flat MASTER is served by the tone control With the interaction of FILTER and SPLIT selectors different configurations for the Input signals are possible quattroitalia s r l 35020 ALBIGNASEGO PD ITALY V delle Industrie 38 Tel 39 049 862 6724 Fax 39 049 862 6440 E mail info omnya com internet
30. signals e MICROPHONE HIERARCHIES follow the opposite direction upstream The Master microphones will be called mic 1 2 3 4 SLAVE 4 microphones mic 5 6 7 8 etc quattroitalia s r l 35020 ALBIGNASEGO PD ITALY V delle Industrie 38 31 Tel 39 049 862 6724 Fax 39 049 862 6440 E mail info omnya com internet www omnya com NOTES quattroitalia s r l 35020 ALBIGNASEGO PD ITALY V delle Industrie 38 Tel 39 049 862 6724 Fax 39 049 862 6440 E mail info omnya com internet www omnya com 32
31. sociation with a further condition illustrated in the yellow document associated to the manual This procedure is used as a minimal protection against accidental operations quattroitalia s r l 35020 ALBIGNASEGO PD ITALY V delle Industrie 38 20 Tel 39 049 862 6724 Fax 39 049 862 6440 E mail info omnya com internet www omnya com 5 2 INDICATIONS FROM THE VU METER The default indications of the LEDs forming the VU Meter are ON status gt O O O O 36dBu 12dBu 6dB 0dB 3dB The indicated values are absolute values referred to the master output If using an unbalanced output a 6dB reduction must be considered The levels in the picture are default values and can be reassigned as desired through a software When the AM41443 is switched ON the VU Meter indicates a series of operations the device is performing Therefore the blue LED on the far left indicates that the devices has been switched on while the others indicate if the unit is defined as a Slave or a Master or which is the phase in which it is toggling In the previous chapter there was a reference to a transition status Here below are depicted the different indications associated with the status Transition status 4 LED O O O O O O No Master no Slave After about 10 seconds during which the device is toggling in the transition status and if unconnected to a chain or connected in a chain with no Master its elects itself to Master status 6 LED
32. t provide the indicated results SPLIT A GAIN MAIN OUT A GAIN MAIN OUT B A B FILTER BYPASS SPLIT This function permits the separation of the four inputs into 2 groups One group will be addressed to the Master output 22 par 2 4 the other will go to the 2 auxiliary output 21 par 2 4 Based on the position of the SPLIT selectors jointly with the FILTER BYPASS selectors these two groups provide various configuration i e 1 2 3 4 or 1 2 3 4 1 2 etc Here below we exemplify various situations quattroitalia s r l 35020 ALBIGNASEGO PD ITALY V delle Industrie 38 14 Tel 39 049 862 6724 Fax 39 049 862 6440 E mail info omnya com internet www omnya com MONO MODE configuration default The device is release by the Manufacturer in this configuration Position of the selectors Inputs 1 2 3 4 are addressed to the OUT2 Inputs 1 2 3 4 are addressed to the MASTER output i This configuration is independent from the position of the filters selectors SPLIT MODE configuration Position of the selectors Inputs 1 2 3 4 are addressed to OUT2 i Only the Inputs 1 2 are addressed to the MASTER output r A DO With the interaction of the SPLIT MODE and FILTER selectors is possible to obtain different routing patterns as for example a stereo separation Inputs 1 2 to the MASTER output Inputs 3 4 to the AUX output These variati
33. ther with specific devices for the control of telephone lines traffic is a fundamental component for this kind of installations The mixer gives all the advantages of an automatic device to obtain an ideal signal noise ratio during transmission 7 4 BROADCAST APPLICATIONS In a radio or television studio the microphone management is usually a sound engineer occupation Nevertheless in many cases the installation requires an immediate opening of the microphones typical feature of an automatic mixer and the possibility to limit the maximum number of microphones open at the same time thus limiting also the involvement of an operator For these reasons the AM41443 is particularly indicated for open discussions and round tables both in live and recorded sessions quattroitalia s r l 35020 ALBIGNASEGO PD ITALY V delle Industrie 38 26 Tel 39 049 862 6724 Fax 39 049 862 6440 E mail info omnya com internet www omnya com 8 TECHNICAL CHARACTERISTICS AND PERFORMANCES 8 1 LIST OF THE CONTROLS AVAILABLE FOR REMOTE CONTROL GENERAL MUTING MUTING of a single channel OVR override of a single channel ONE ON activate Ch1 or a channel different from 1 if needed LAST ONE the channels open at the time of the termination of the speech remain activated PRIO 1 activates the priority on CH1 2 3 or 4 on the master unit NOM limits the output level according to the number of open microphones maintain OdB level LOM with the indication of th
34. through a RJ45 shielded connection cable containing the audio and the control line data An output group can be managed by a tri band equalizer adjusting the curve The input channels can be divided into two groups for particular uses such as in broadcast applications with ambience microphones This device works with 24V external batteries and can give power supply up to 5 AM41443 with no need of additional power sources The firmware updates available on Internet can be easily installed through the USB port 1 3 THE PACKAGE CONTAINS Inside the AM41443 box you will find 1 AM41443 1 50 cm RJ45 RJ45 connection cable 1 24V 300mA power supply 1 short rack mounting bracket long bracket for single mount or support for double mount are optional quattroitalia s r l 35020 ALBIGNASEGO PD ITALY V delle Industrie 38 3 Tel 39 049 862 6724 Fax 39 049 862 6440 E mail info omnya com internet www omnya com 2 DESCRIPTION The automatic mixer preamplifier AM41443 provides all the fundamental functions typical of such device and some more features e It opens the engaged microphone channels only and keeps the others closed see par 4 8 In other words when the signal is generated by the voice of the speaker talking into the microphone the channel opens and turns on the signal In any other case when the signal is due to ambient noise or reverberation the channel stays closed and the signal is attenuated and not heard e It keeps th
35. trol port see 3 6 RS232 serial control port see 3 7 Connector used to link other mixing units through a daisy chain connection see 3 8 3 1 FRONT PANEL SELECTION SWITCH In the default configuration of the device all the switches are lowered In this condition it works as an automatic mixer To be more detailed OMNYA ON OZTEZO OA O Oo La Se Land nal no 3 OFF AUTOMIXER PHANTOM LIMITER LAST ON PRIO CH1 The first lowered switch shows that the device is operative in the automatic mode while all the other functions are deactivated These functions can be activated putting switches no 2 3 4 5 in the ON position For example to activate LAST ON push switch no 3 upward to activate phantom power on all microphones put switch no 5 in the ON position The first switch in the ON position shows that the device is in the manual mode i e mixing every signal without on board intelligence as a concert mixer The other functions Noise Gate Future Use Limiter and Phantom can be activated pushing the switches upward N B The first switch position changes the meaning of 2nd and 3rd switch quattroitalia s r l 35020 ALBIGNASEGO PD ITALY V delle Industrie 38 8 Tel 39 049 862 6724 Fax 39 049 862 6440 E mail info omnya com internet www omnya com MANUAL ON MIXER OFF PHANTOM LIMITER FUTURE USE NOISE GATE P S The AM41443 can be controlled through an external serial
36. ual mixer see par 3 8 In this logic we must consider that it is necessary to assign the chain control to one of the units Master This device will lead the chain while the others slaves will be logically connected to the first one For the activation and connection procedure of the devices please see chapter 5 In this modality the mixers can be controlled through the frontal potentiometers for the various input channels The general volume master volume will be exclusively controlled by the potentiometer of the Master unit The output levels on the single units are disabled In this configuration it is possible to mix automatic and manual mixers to build a flexible system The local controls activated with the front panel are working on the local device 4 4 CONTROL AND PROGRAMMING The AM41443 can be installed and operated under an external control The external control can be used to make an accurate setting of the system and control it in a remote modality These modality can be of three types e External control in a tuning session made through the USB port It is useful to control each parameter of the system using the software provided with the AM41443 cfr Software manual for AM41443 This operative mode is indicated for the accurate control of all the variables contributing to the system functions The external control is operative both with a single mixer Master and with a system constituted by more automatic units and manual
37. vailable for download at the website www omnyamix com download htm The parameters on the single AM41443 connected to form a system can be completely controlled through the USB B connection In a configuration made with more than one AM41443 linked together the USB port works exclusively on the Master unit 3 7 RS232 CONTROL PORT The automatic mixer AM41443 has a serial port RS232 for the connection with a standard control system device 2 4 23 The connection is made via a 3 5mm stereo jack connected as follow Tip Tx Ring Rx Body Ground In a configuration made with more than one AM41443 linked together the RS232USB port works exclusively on the Master unit quattroitalia s r l 35020 ALBIGNASEGO PD ITALY V delle Industrie 38 12 Tel 39 049 862 6724 Fax 39 049 862 6440 E mail info omnya com internet www omnya com 3 8 DAISY CHAIN CONNECTORS AND RS485 COOMUNICATION PORT The AM41443 can be connected in a chain to obtain complex configurations For this reason on the back panel there is a double connector of the RJ45 type 20 par 2 4 These connectors provide the following signals e Digital line RS485 for the communication between different devices e Balanced analog line with the sum of all the channels and mixers connected upward e On the OUT connector a balanced line signal is available on the IN connector there is a real line balanced input that can be used for the input of a 0 dB signal in the system see table
38. vices Normally in a data network each device must be precisely identified In the case of a chain made with a series of AM41443 the ID is automatically assigned with an increased speed and easiness creating the network The operation that must be performed is preparing the devices for the auto configuration For this operation we invite you to read the next section of this manual One more note on the behaviour of the device while in Slave mode when switched ON in the absence of a Master In this case the Slave device after hearing the chain for about 10 seconds is not finding a Master it temporarely change to Master stand alone this status is for permitting the local functionality to a single system quattroitalia s r l 35020 ALBIGNASEGO PD ITALY V delle Industrie 38 19 Tel 39 049 862 6724 Fax 39 049 862 6440 E mail info omnya com internet www omnya com 5 PROGRAMMING An important operation to be made when connecting more AM41443 units in the chain is to define the role of the single units In a system there can be only one Master able to coordinate up to 23 additional Slave units Preparing the Master and Slave units we must focus our attention on a small switch placed in a hidden position on the right side of the front panel 9 par 2 3 it can be reached through the small hole in the panel It is called reset switch 5 1 RESET The reset switch activates some features according to the way it is pressed There are bas
39. wing switches depends on the 1 switch Automixer Manual e 2 switch Automixer mode PRIO CH1 Active on Master Deactivated on Slaves When we receive a signal on channel 1 the other channels are attenuated both on the Master and Slave units The attenuation is equal to the Automixer under threshold default 18 dB On the channels attenuated by channel 1 priority the green leds stay on in case a signal is passing that is while the green leds are turned off to show a channel is closing in an Automixer under threshold situation they stay on in case of a signal in a PRIO CH1 situation This control does not work on the devices configured as manual e 2 switch in Manual mode NOISE GATE Active on Master Active on Slaves If in Manual mode when the channel goes under threshold and closes the channel green led do not turn off This means that in manual mode the green leds are always on e 3 switch Automixer mode LAST ON Active on Master Deactivated on Slaves The LAST ON involves the whole chain e 3 switch in Manual mode Future Use Active on Master Deactivated on Slaves e 4 switch Automixer mode LIMITER Active on Master Active on Slaves e 4 switch in Manual mode LIMITER Active on Master Active on Slaves quattroitalia s r l 35020 ALBIGNASEGO PD ITALY V delle Industrie 38 23 Tel 39 049 862 6724 Fax 39 049 862 6440 E mail info omnya com internet www omnya com LIMITER behaviour wh
40. www omnya com These variants are the subject of an APPLICATIVE NOTE separated from this manual 4 OPERATIVE MODALITIES The AM41443 automatic mixer was born to be a fully autonomous and ready to use device with the default parameters factory default Changing the position of the 1 switch of the frontal dip switch 10 par 2 3 it is immediately possible to decide if the device will act as an automatic mixer or as a manual mixer For the other presets see chapter 3 An AM41443 has 4 input channels for the use of a greater number of channels more devices can be connected in a chain These devices can be programmed or controlled via an external connection to a PC or to a remote panel The connection can be made through a proprietary link with the RS485 or USB ports or with a Crestron AMX protocol with a RS232 port We schematically report the different functional modalities DEVICE CONFIGURATION Programmable Via Computer Via Computer MANUAL Controllable Via Remote Panel STAND ALONE SINGLE Programmable Via Computer Via Computer AUTOMATIC Controllable Via Remote Panel DEVICE CONFIGURATION Programmable Via Computer if Master MANUAL Via Computer Controllable if Master Via Remote Panel IN CHAIN Programmable Via Computer if Master AUTOMATIC Via Computer Controllable if Master Via Remote Panel quattroitalia s r l 35020 ALBIGNASEGO PD ITALY V
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