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AMIX Series Automatic Mixers

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1. 12 cable is not symmetrical 1 e the ends must be Male Male yY pus DB25 2 NNNM 24 DB25 Connected as marked Label the ends of this master end 1 4 WM D5 slave end cable No pins other than the ones shown should be connected 9 2 Connecting the Cables After the cables are made and tested for correct wiring connect the control and audio chains as shown The two control ports the upper DB25 are connected together The two Control Cable Jo audio ports the ower DB25 are con nected together keeping in mind that the audio cable has a master end and a control end g d o0060000000000 d IS oooooooooooo e O Li D MEE Audio Cable 2 06600600038 00090606000000900 lo L O i a Aux and Control intelix 27 AMIX Series Automatic Mic Line Mixer User Manual 10 0 AMIX LINK Module 28 This section describes the capabilities operation and use of the AMIX LINK Module The Link Module is an accessory to the Intelix AMIX 4 and AMIX 8 The Link Module attaches to the rear of the AMIX mixer chassis dramatically extending the capability of the AMIX mixer Two labeled views of the Link Module are shown below The principle function of the Link Module 1s to Provide a simple method of linking multiple AMIX mixers Provide ports for external equipment audio patching capability Provide a port allowing remote control of the AMIX mixer Provide a port for full remot
2. GENERAL Frequency Response Max Voltage Gain Signal to Noise Equivalent Input Noise Crosstalk Channel Gating Holdtime Off Attenuation Bar Graph Reading Attack Decay Signal Present Indicators Input Clip Indicators Limiter Threshold Adjustment Control Options Aux DC Volume Control Voltage Nominal Remote DC Volume Control Resistance Power Requirements Dimensions Shipping Weight average 5 dB from 20 Hz to 20 kHz 0 3 dB from 10 Hz to 30 kHz 96 dB Ref 26 dBu 54 dB sys gain 90dB 129 dB 150 Ohms 20 Hz to 20 kHz better than 90 dB 13 ms 1 7s potentiometer 0 to co dB potentiometer 18 12 6 3 0 3 6 12VU Avg or Peak Main or Aux 1 7 ms 650 ms Peak reading 10 dBu threshold Peak reading 13dBu threshold 10 to 10dBu RS232 DC Logic ReO 0 5V DC 10 kOhms linear 18VAC Center Tapped 21 VA 19 x 9 x 1 75 48 2 cm x 22 8 cm x 4 4 cm 15 total depth with AMIX LINK 12 5 Ib 5 7 kg INPUTS Input Trim Range Input Impedance Nominal Source Impedance Mic Line Pad Max Input Level Low Cut Filter Aux Input Impedance 40 dB 3 5 kOhms Mic 15 kOhms Line 150 Ohms 50 dB 20 dBu line pad on 12 dB per octave 120 Hz 20 kOhms balanced OUTPUTS Output Impedance Nominal Load Impedance Nominal Level Maximum Level Main Out Mic Line Pad balanced 440 Ohms unbalanced 220 Ohms 600 Ohms 4 dBu RMS 26 dBu RMS balanced
3. 50 dB CC O Q intelix 41 AMIX Series Automatic IVlic Line Mixer User Manual Notes 42 intelix
4. AMIX Series Automatic Mixers AIVITX 4 3 Installer s Mianual aw AMIX Series Automatic Mic Line Mixer User Manual Warranty All Intelix products are guaranteed against malfunction due to defects in materials or workmanship for two years after date of purchase If a malfunction does occur during the specified period the defective product will be repaired replaced at Intelix s option without charge Furthermore the Fresh Start program ensures that a product which has been repaired replaced 1s itself guaranteed for an additional two years This warranty does not cover 1 Malfunction resulting from use of the product other than as specified in the user manual 2 Installation specific wiring 3 Malfunction resulting from abuse or misuse of the product 4 Exterior chassis appearance 5 Malfunction occurring after repairs have been made by anyone other than Intelix or any of its authorized service representatives 6 Acts of nature 7 Optional embedded software upgrades or updates All repair and service of Intelix products should only be provided by qualified service personnel Please contact Intelix for a list of authorized service agents Other attempts at service or repair will void the warranty Warranty service is only offered after a return authorization number has been generated by an authorized Intelix representative Toll Free Service Number 1 866 4 MATMIX Intelix LLC 2222 Pleasant View Road Middleton WI 53562
5. Unbalanced source hookup RCA Plug intelix 39 AMIX Series Automatic Mic Line Mixer User Manual 11 0 Troubleshooting Tips 40 NO POWER gt Check the connections between the mixer and the power supply and the external AC power supply gt Check the wall outlet NO SOUND gt Make sure the mic line switch is in the proper position This is the most likely cause Make sure both the master and channel input controls are turned up Check that the source signal cable s is properly connected and undamaged Adjust trim gain potentiometer s to increase gain If there is still no sound try changing input source s to different channel s Make sure that jumper J1 is in place see page 30 VVVV WV DISTORTED SOUND gt Turn down the master volume control If distortion persists input channel s is likely cause gt Check position of all line mic switches Check the position of DIP switch number 8 it should be in the up position unless you have special reset requirements see page 13 gt Determine the distorting input channel s by checking them one at a time gt Decrease gain of input channel s causing distortion By turning the gain trim control potentiometer on the rear panel EXCESSIVE HISS or HUM Hiss Make sure the volume control knobs for all the unused channels are set at 0 and in line position Make sure the mic line switch is in the correct position for both the input and output Hum
6. Phone 608 831 0880 wm Fax 608 831 1833 www intelix com ap intelix intelix com Copyright Intelix 2004 All rights reserved April 2004 2 intelix AMIX Series Automatic Mic Line Mixer User Manual Table of Contents T U Intro UC Osona eisoes aa EE aaea 7 ESO EEN I MES T EE eu I t2 Maimtenance Re EEN 7 L Quick Start Jor the BIR RE 8 BS e WE pack aid Conte EE 8 UR ONCE UD EE 8 ES TE te EE 8 1 3 4 Optional special features aCHvaton 8 1 3 5 Linking Alpe REES 8 20 Panel DCS duris Lee 9 2 0 Panel Ee ee EE 9 DN Mixer Font P abel oest etc llom limbe G 9 2 2 Mixer Front Panel A6cessWIDnOO Waco eoo mitad Od es oer dta p dee oam UE 10 2M ier Rear EE Il SIE WHK CN 12 SR mU FUION SERT eee 12 S ThresholdsSensittVe GANE EE 12 5 2 Number of Open Microphone S edo oui o po terne t ptor eere ameet br onan e nb e eos s a d 12 So HORT Nme Poten onele ooreen se ui E Eus ee 12 3 4 Off Attenuation Amount Dotenttometer nennen enne nnne nnn nnne nnns 12 5 2 User selectable Modes of Opera le EE 13 Suc as Te 13 3 5 2 PATS COMIC MES E EE 13 Ee sind OV e REN 13 S AN Channel Exe te EE 14 5 0 AMIX SoftWare Vers IO Meissie ees pae ectetur o as aee eda Unde co scan undies niea secet ur pde peus 14 AA Tasta llati mE 15 4 0 Installation of the AMB beer EE 15 Sch Unpacie Connect and POW eri o asses end dene qu Dao tesina aa beasts otn edi eae oet 15 d C OBC COU Se on ad das Dema accedit deien 15 dC NC E EE 15
7. phones 6 2 Phantom Power Switch C If a condenser microphone is not independently powered press the phantom power switch to the on position This will cause the mixer to power condenser mics through the mic cable When the phantom power switch is in the on position all channels whose mic line switches are in the mic position receive phantom power 15 VDC 6 3 Aphex Aural Exciter UL This feature enhances signal intelligibility by adding supplementary harmonic information It 1s especially effective at clarifying speech Aural Exciter k on 6 4 Output Limit Switch The Output Limiter is a safety feature which protects the entire audio system from excessive volume levels It ensures the signal leaving the mixer does not exceed the system s safe dy namic range The factory setting is 0 dBu but the threshold is variable from 20 dBu to 20 dBu and is set by adjusting a potentiometer inside the mixer chassis see sec 8 3 for location of Output Limiter Threshold Potentiometer VCT A u eo rs To engage the Aural Exciter amp press the Aphex Exciter switch to the on position If during ordinary use one or more inputs occasionally exceed the maximum input levels set up during the set up procedure sec 5 0 1 e the red 12 dB LED on the bar graph meter occasionally lights press the Output Limiter Switch to the on position intelix 19 AMIX Series Automatic Mic Line Mixer User Manual If
8. AMIX circuit board as shown below Remote muting switches require no jumper changes 10 4 6 1 To set jumpers Remove the ten screws holding the cover of the AMIX Mixer in place Locate connector SK12 as shown below For each channel using a remote volume control pot remove the jumper corresponding to that pin from SK12 See Section 8 3 for jumper assignments SK 2 is the same as P12 Note While the cover 1s off confirm that all channels without external remote controls have the correspond ing jumper installed Channels 1 3 5 and 7 should also have jumpers installed Replace the cover on the mixer securing with the ten screws EH be ta intelix AMIX Series Automatic Mic Line Mixer User Manual Pinout for AMIX 4 u n u S e d Gm vu CG D S Gm ES D S Gm ES D S D V V V VV V V VM A LG G U OC OC OC OC OC O0 O S P I NN Pinout for AMIX 8 C L LL LL LL LT E MD D K 1 3 2 4 5 76 8 R X The pin assignment of jumper block SK12 on the AMIX module logic board The AMIX 4 channel pinout is shown above the connector drawing Note For the connection of Control Pin Port control devices it should never be necessary to move any jumpers except Vol2 Vol4 Vol6 Vol8 and MSTR 10 5 Using the Link In and Link Out Ports There are three principal uses of the Link In and Link Out ports Facilitate linking of multiple AMIX mixers Provide tapping and patching of the audio signal Provide an
9. Mics lines can easily cause hum Make sure to locate them away from vibration and magnetic field sources motors power supplies and lines and data lines Check mic lines especially the shield for damage Another common source of hum is a ground loop which can result from connecting two or more powered devices together Turn the master volume down If the hum is still present the ground loop or other cause is not in the mixer but in the connections or devices after the mixer in the audio path If the hum 1s in the mixer first check to see 1f the Ground Lift Jumper J4 is present It should be removed unless the mixer is in a nonmetal cabinet Check for unbalanced connections use balanced connections 1f possible For all unbalanced connections try to disconnect the signal line ground to lift the ground intelix AMIX Series Automatic Mic Line Mixer User Manual 12 0 Technical Specifications and Line Drawings Output Output Pad 000000 00000 o9 On BE Off Linen Aux amp Control 0000000000000 000000000000 wR 000000 00000 DL e Line Sid Mic 9 ELIT ELIT PA oooo ch Line nee Mic te NE me Ja 4 e n o EB 9 Cut AMIX 8 Front and Rear Specifications intelix 18 12 6 3 O 43 46 12 Master Pwr intelix oooo0o000O0 48232 A 3 05346432 Master pwr E Se D AMIX 8 8 7 2 8 9 9 9 Q o dech EL o e ich On BE Off Linen Aux amp Control ica man
10. all the mics more than once in order to have each channel completely isolated Set Signal Present Level 1 Turn all volume levels to zero 2 Place microphones in the positions they will occupy during the event 3 For each channel speak in a normal tone into the mic being adjusted Use a small screwdriver to turn the rear panel input gain trim control clockwise until the red Signal Clip LED is steady on The LED acts as channel on indica tor 4 Turn on the amplifier and set the mixer s master volume to 6 or 7 Adjust the front panel volume control knob for each channel to the desired level rather than using the clip LED as a guide because of its dual function as a signal detect LE intelix 21 AMIX Series Automatic Mic Line Mixer User Manual C Select special modes and functions by setting DIP switches 1 4 Switch 1 selects link mode control configuration up master down slave Switch 2 selects last mic on function up last mic on Switch 3 selects first come first serve function up first come first serve Switch 4 selects automatic mixing linking mode up unlink down link For stand alone operation whenever a mixer is physically linked Switch 4 must be set in the up stand alone position 7 1 Channel Isolation With the volume control knobs at the positions which give the desired volume for each chan nel verify that each mic is isolated To do this return to mic 1 and make sure t
11. down unit out position AMIX Series Automatic Mic Line Mixer User Manual 2 2 Mixer Front Panel Access Window 10 TI au eebe dd Ahhh Status LED Green if lit AMIX is operating in linked mode 1 e at least two mixers are connected together and their switches are correctly configured Reset Button restarts AMIX software without powering down the whole mixer Resetting causes the clip red LEDs to display a pattern which indicates software ver sion number see section 3 8 Select Button used to exclude individual channels from automix DIP Switches 1 8 Switch 1 selects link mode control configuration up master down slave Switch 2 selects last mic on function up last mic on Switch 3 selects first come first serve function up first come first serve Switch 4 selects mixer link mode up unlink down link Switch 5 selects escape mode up escape mode down no escape mode Switches 6 7 unused Switch 8 controls reset mode up toggles reset to factory defaults full on down toggles preset on reset preset determined by RS232 command Preset on Reset If no preset is defined then reset uses preset 0 live crosspoints Recom mended for users of RS232 control Full on reset is limited by front panel con trols Hold Time Potentiometer controls the amount of time ranging from 13 milliseconds to 1 7 sec that an open mic will stay on after there is no direct sound inp
12. mixing last mic on first come first serve and priority override Features include 4 or 8 channel automatic mixing NOM automixing Threshold sensitive gating Optional RS232 or ReO control Linkable Chairperson filibuster override Phantom power Essentially AMIX is an automixer designed to work seamlessly within an integrated media environment 1 1 Safety Instructions Read all directions carefully before use The AMIX system includes a variety of electrical equipment all precautions usually taken with electrical equipment must be abided by Specifically Grounding verify both the AMIX mixer and the devices connected to it are prop erly grounded Power Supply use only the power supply provided by the manufacturer or one that meets the manufacturer s specifications Cords and Cables route all cords and cables so that they will not be trip hazards or subject to damage from being run over or pinched which could cause them to be come shock hazards Pay particular attention to cords at plugs convenience recep tacles and the point where they enter the mixer Fire if the mixer or other electrical equipment catches fire extinguish the fire using a carbon dioxide CO extinguisher or any extinguisher rated for electrical fires Never use a water extinguisher 1 2 Maintenance Guidelines Electronic devices operate best in clean well ventilated environments The AMIX mixer contains many electronic component
13. of the background noise from off inputs 3 5 User Selectable Modes of Operation Modes are selectable via the front panel DIP switches see section 2 2 for dip switch settings In linked mode the master unit controls these functions for the entire linked chain 3 5 1 Last mic on The last channel to gate on remains open until another channel is activated This function 1s critical in an environment which requires continual background sound e g broadcast feed or recording DIP switch 2 activates this mode in the up position and it initiates with the highest number channel on 3 5 2 First come first served Only one channel may be active at a time All channels exhibit equal priority When a channel is active all others are inactive until the active channel drops below threshold and 1s gated off This function is useful in environments where only one source should be active at a time e g boardrooms teleconferences or courtrooms DIP switch 3 activates this mode in the up position This function is affected by the Hold Time Pot When first come first served is active the active channel will continue as long as there is no lengthy pause allowing another channel to become active indicated by the front panel LEDs If the Hold Time Pot is set at the shorter end of its range 13 milliseconds then any pause in the active channel s input such as the talker taking a breath will cause the channel to shut off For first come firs
14. the AMIX module and using only one mic Observe the behav ior of the red LED associated with that mic and adjust the pots to the desired response levels In linked mode the master unit controls both these functions for all the units in the chain 1 e only the pots on the master units are active all others are disabled intelix AMIX Series Automatic Mic Line Mixer User Manual 8 0 External Control Intelix AMIX series mixers have several special built in features which make the remote control and muting of both the individual channel inputs and the master output easy to acti vate and simple to change The ability to enable external audio signal modifications such as insert patching and direct outs is also built in The activation of all built in features requires wiring of external devices potentiometers switches etc to a male DB25 connector 8 1 The Connectors All external controls and signal sources are attached via the DB25 Control Pin Connector Note that AMIX 4 has external control over all channels while the AMIX 8 has external control only over even numbered channels t Balanced link input Balanced link input Master Volume Wiper Master Volume High Channel 4 Wiper Channel 4 High Channel 3 Wiper Channel 3 Huel 00000000 0000000000 Channel 2 Wiper Channel 1 Wiper Manual Duck Switch Link Out Insert Patch Out 00000 Insert Patch In Channel 2 High G
15. to remove the jumper via the ground lift jumper access see Section 2 3 6 7 Rack the Mixer Install the mixer in the rack or other cabinet where it will be when in use The mixer should be located away from heat sources including other electronic components which generate a large amount of heat such as amplifiers Verify the unit is well secured 20 intelix AMIX Series Automatic Mic Line Mixer User Manual 7 0 Setting AMIX Functions Before proceeding to the adjustment of AMIX functions ensure the following steps have been completed 1 Turn all volume knobs on both the mixer and the amplifier to zero 2 Connect inputs and set all mic line switches to their appropriate levels all unused channels should be set to line 3 Connect the output and set the mic line switch appropriately 4 Turn on the low cut switches for all active channels 5 Connect the mixer power supply and plug into an AC outlet 6 Power up the mixer and the amplifier Now proceed to the following steps A Power the AMIX module by pushing button 8 on the right hand side of the AMIX module to the in position Activating the AMIX functions will cause the level of background noise transmitted by the mixer to change This 1s because the AMIX module 1s automatically controlling the output level of the mixed signal B Adjust the input volume for each channel Note Channel isolation is an iterative process it may be necessary to go through checking
16. 1 on the left to the down position This designates the mixer as a slave Set DIP switch 4 to the down position This puts the mixer in linked mode 10 1 3 Connecting the control chain Using one of the included control cables they have a RJ11 or phone type plug on both ends connect the master mixer s M out S in port to the slave s M out S in port Using the other control cable connect the slave s M in S out port to the master s M in S out port 10 1 4 Connecting the audio chain Using the included audio cables they have an RCA phono plug on both ends connect the slaves Link Out port to the master s Link In port Note There should be no connection to the master s Link Out ports The only connection to the slave s Link In port should be the supplied shorting plug intelix 29 AMIX Series Automatic Mic Line Mixer User Manual AMIX Mixer Slave Fig 7 This drawing shows the connections and switch settings m m required for the cor rect operation of a two mixer stack The supplied grounding plug should be left in place in the Link In Port of the slave mixer as shown the black LI LO Ins ul QOS TV AMIX Mixer Master 10 2 Installation of the AMIX LINK 10 2 1 Installing The AMIX LINK s two DB25 connectors plug directly into the two DB25 connectors on the back of the AMIX Secure the two AMIX LINK connectors to the two AMIX connectors with the four captured screws of the A
17. 3 of the mixer s DB25 Note that jumper J1 is removed for insert pin12 applications Note If a patched application 1s no longer de sired jumper J1 must be replaced SIE Device He intelix AMIX Series Automatic Mic Line Mixer User Manual 9 0 Passive Mixer Linking Mixer linking allows the user to add additional microphone or line level inputs as needed without the loss of inputs or automatic features There are two methods of linking AMIX mixers passive or active linking Passive linking uses only cables whereas active linking uses the Intelix AMIX LINK Passive linking 1s suitable for linking two mixers whereas active linking 1s easier and more flexible Using the AMIX LINK up to six AMIX mixers can be linked into a single stack In any stack one mixer is the master and all the others are slaves Linking involves three steps 1 Set the DIP switches 2 Connect the control chain 3 Connect the audio chain 9 1 Making the Cables Two cables must be made to link two mixers the control cable female DB25 to female DB25 and the audio cable Male DB25 to Male DB25 Note The audio cable is not sym metrical i e the pin configurations at each end of the cable are different The wiring diagram for the control cable This Female cable is symmetrical Le either end can be DB25 connected to the master No pins other than the ones shown should be connected Female DB25 The wiring diagram for the audio chain cable This
18. 5 10 4 6 Setting internal jumpers for the control pin port 36 10 20 D TOSUP a E 36 105 Wine me Link mand Line Qui EE 37 10 5 1 Tapping and patching with the AMIS UINK cc eeeceesecseeeeeeeeeeeeeeeeeeeeaaeas 37 10 5 2 Using the link in port as a balanced link vmmmut 38 105 2 If your SOU CEC IS balance EE 39 10322 If your so rce 1s Unbalanced osos a A 39 11 0 Tro bl eshootine Tips sicecceissveceisvcccecateccestenescccecessdeseonncseuncaesasvacenceveteeessssesvens 40 12 0 Technical Specifications and Line Drawings eee 41 intelix 5 AMIX Series Automatic Mic Line Mixer User Manual Md J9 selA 0 Md Jeep OL 0 6 Z 9c lt 9 ET O E GY Gl gt 941 9 ET O 9 Gl Bl eooooooo SIS Wurt ONY MoT e mo HUT Il IPINY moq o 8 X INV pat pue 3u014 8 XTNV mat pue 30014 p XIIANV OIN gout OUI 2 1 q4our SUIT il oN OJJUO xn aour ai JO 4UO 8 V will O lA o wozueyd ooooo ooooo O Q 0000000000000 000000000000 0000000000000 OJJUO xn aour wg JO duo 2 8 V will ol o LUOLUEUe ooooo ooooo Q O 0000000000000 oooooooooooo ooooooooooooo LS tel InN AMIX Series Automatic Mic Line Mixer User Manual 1 0 Introduction This manual describes the components and operation of the Intelix AMIX Automatic Mic line Mixer and the Intelix AMIX LINK link module A sophisticated auto mixer AMIX provides several modes of automatic
19. Gel COMMS CL ONPI estocs incom de Mu D Ee UEM AE IIS IMP RU es can iX du eae 16 EO ONCE UD ondes imt DU CUL oap Rc Ee de denos dent MIRI I Md 16 45 L Connect tic Mixer power EE 16 4S2 Power up the MI XC ege 16 intelix 3 AMIX Series Automatic Mic Line Mixer User Manual S0 enini 17 AEG UV CEU NER mmm 17 5 1 Setting the AMIX Mixer Channtnels cc ssseeeeseeeeeeeecacccctsenennansesseveeseceseeeeceseceaeesennans 18 OA Mixer Fine tun 19 5 0 Mer Pine DUBIE Omet metes ets a ee Re 19 OL LONEC U ME tat totem abeat aded umido ra ane uae senate 19 62 Phantom Poet WI ssec edis RE utrius etc die tutu ue TU MI LA UM iene 19 A Aphex Aural F SCHET oce need Oper Mad Dee ob du esto o dune iere 19 Od OUIUDDUE Ee EE 19 6 5 Sselecr Bat EE Ee 20 6 62 EC Ground Dub UDC oot edi e tan e Ae au uo tutu tust utes Duis o ied s tiun dor oue educ 20 Old de de EI MB S ORE TE UU o S E ETE 20 TA Setting AMIX EUnctlOns iei coss ooo obe ee Iove reu EENS 21 ES i AMIX PU TIONS esca T ER 21 SC IC ES E ON EE 22 2 Tinc Tunis AMIX aC On Sets eive reto eni eden tastat waco e e IS et beside uns 22 S0 EX COPANO reU rec 23 BOE ICE Yo ie C ODIT OL EE 23 SET COAC EE 23 BD DC CON e EE 24 E l Remote VOMM ee E 24 5 2 2 C onnectmie d remote volume CONTO bodron 24 52 9 ROMO Tube CONTO Loads ateses aca dades es 24 8 2 5 1 MV o dn external qute SI VIC comments 24 8 2 3 2 Wiring an external combination mute switch a
20. MIX LINK s two DB25 connectors 10 2 2 Removing Jumper J1 If you ever intend to use the insert patch functions of the AMIX LINK the Jumper J1 must be removed from the mixer circuit board This jumper 1s located as shown below This drawing shows the mixer board with the top of the chassis and the AMIX LINK Module removed The jumper J1 cannot be removed with the link module in place After the AMIX LINK Module is removed locate remove and discard jumper J1 then reinstall the link module If you never intend to use the insert patch functions of the AMIX mixer leave JI installed as it comes from the factory Jumper J1 Yu d I Output Pad Switch gt D25 Connector on rear panel The position of J1 on the AMIX mixer board The drawing is looking down on the mixer from behind Remove J1 by pulling straight up The jumper may be discarded after removal 30 intelix AMIX Series Automatic Mic Line Mixer User Manual 10 3 AMIX LINK Connector Descriptions This section provides a description of each port on the AMIX LINK with a reference to the manual section explaining how to use that port 10 3 1 Gate logic output port description The Gate Logic Output port provides a digital output signal active high for each channel This port provides state information which can be translated by a remote device into an action e g remote camera that points at the current speaker When a channel is gated on its corres
21. and set the output pad switch at the appropriate either mic or line level 5 Set low cut filter switch on for all active channels 1 3 2 Power and set up 1 Connect mixer s AC power supply 2 Power up mixer and amplifier 3 Enable automatic mixing by pushing the AMIX engage button to the in position 4 For basic operation ensure that all DIP switches except switch 8 are down 1 3 3 Fine tuning Adjust the gain screw on the back of the mixer for each individual channel so that the clip gate on LED 1s steady on at normal voice level Make sure to adjust the individual channel gains so that each mic 1s isolated only one comes on at a time Adjust attenuation time and amount pots on the AMIX if desired factory settings are one second and oo dB respectively 1 3 4 Optional special features activation Attach DC control points and audio bus connections to the DB25 connector on the rear panel for direct out insert patching to enable remote volume control and mute control 1 3 5 Linking multiple mixers All AMIX mixers may be linked together serially daisy chained in one of two ways The simplest and most flexible method is by using the Intelix AMIX LINK module If the application does not require the use of the AMIX LINK e g simple linking of two mixers the mixers may be daisy chained using interconnect cables For more information please refer to sections 9 and 10 8 intelix AMIX Series Automatic Mic Line M
22. annel 8 8001 models or channel 4 4001 models El Channel Input Gain Trim Control Potentiometer adjusts gain of input stage over a range of 40 dBu XLR input Jack balanced male XLR input connection one per channel Input Mic Line Switch selects mic level 50 dBu or line level 0 dBu for correspond ing channel intelix 1 AMIX Series Automatic Mic Line Mixer User Manual 3 0 AMIX Functions In addition to standard mixing functions AMIX also provides standard automatic mixer functions 3 1 Threshold Sensitive Gating Each AMIX mic line channel will gate on and off when a signal is present The threshold level at which the gate on occurs 1s set by the channel s trim control Properly adjusting the thresh old level of each channel ensures an acoustic source will not gate on multiple AMIX channels 3 2 Number of Open Microphones Attenuator NOM This function attenuates the master output circuit by 3 dB when the number of channels gated on doubles This is an automatic function and compensates for reduced gain before feedback when multiple channels are open 3 3 Hold Time Potentiometer This pot RP1 controls the amount of time from 13 milliseconds to 1 7 seconds that an open mic will stay on without direct sound input This time keeps the open mic from cutting off sharply when a source pauses between phrases or otherwise rests briefly The factory setting is one second 1 e the left most half of the LEDs on the te
23. aptor PRJ12 DB9 F Adaptor 10 4 3 Connecting to the RS232 port DB9 Jack The RS232 port is used to connect an RS232 controller to the AMIX This is done by con necting the controller s output to the AMIX LINK s RS232 RJ12 port m White The adaptor from the controller s Receive BIGCK DB9 connector to the AMIX LINK s pommi RJ12 connector is made through the Unused 5 AMIX RS232 adaptor available from dos i Ge RJ12 Jack DB9 Jack AMIX RS232 port adaptor wiring diagram Typical connection of a laptop PC to the AMIX mixer using the Intelix RS232 adaptor and a null modem cable intelix AMIX Series Automatic Mic Line Mixer User Manual 10 4 4 Connecting to the control pin port With proper connections to the Control Pin Port the user can remotely control volume and muting of the following channels 2 4 6 8 and the master output If it is necessary to have individual remote control over a channels an Intelix mini mixer connected through the ReO port should be used When a remote volume control is attached to a channel it sets the proportion of the volume control setting on the mixer front panel For example if the Volume Control Knob is set to 7 and the remote control is set at 3 the output volume is 30 of 7 or 2 1 The maximum possible volume in this example is 7 obtained when the remote control is at 10 Only if the mixer s volume control knob is set at 10 does the rem
24. during ordinary use one or more inputs continually exceed the maximum level 1 e the red LED continually lights the input volume must be reset return to the set up procedure as defined in Section 5 Note f the amplifier speaker combination is such that the speakers can be overdriven to failure always operate the mixer with the Output Limit Switch in the on position lower threshold e higher threshold LA 6 5 Select Bar Graph Readout The LED Bar Graph Output Meter may be set to register either the peak or average level of the output audio signal To do so requires opening the chassis The locations of the jumpers for this are shown in section 8 3 The factory setting 1s to the average level 1 e the Average Bar Graph Jumper J 3 is in place To select peak level move the jumper from J3 to the Peak Bar Graph Jumper J 2 instead For the meter to operate a jumper must be in one of these two positions Never place jumpers in both positions fad Stat Rat Select 12345678 Time Atten Engage APHEX i init Master pwr Aural Exciter 18 12 6 3 O 3 6 12 6 6 The Ground Lift Jumper The ground lift jumper on all AMIX series mixers is a feature designed to help prevent ground loops When jumper J4 is present it grounds the mixer to its chassis If the mixer is installed in a non metal cabinet the jumper is left in place When the mixer is installed in a grounded metal rack frame use a needle nose pliers
25. e control via an external mini mixer controller Provide signal present indicators one for each channel used to control any desired remote function 4 Provide an RS232 computer control port to provide for computer control Pin Port M Out M n S In S Jut Gate Logic Output a ei Patch i Jumper J Audio Li E Link Link Inset In I Qut A n Wil M UOu S Qul s In Control Links Jumper Link pm 15 m ut intelix AMIX Series Automatic Mic Line Mixer User Manual 10 1 Quick Start for AMIX LINK This section gives instructions for setting up and linking two AMIX mixers using AMIX LINK Modules 10 1 1 Installing theAMIX LINR Plug the two male DB25 connectors on the AMIX LINK firmly into the two female DB25 connectors on the back of the AMIX mixers Tighten the four capture screws on each AMIX LINK to secure the modules to the mixers If you wish to use the insert patch capacity of the AMIX mixer stack please refer to section 10 2 2 10 1 2 Setting the DIP switches Decide which mixer will be the master keeping in mind the master should be ergonomically convenient The other mixer becomes the slave On the mixer you have designated as the master set DIP switch 1 on the far left to the up position This designates the mixer as a master Set DIP switch 4 to the down position This puts the mixer in linked mode On the slave mixer set DIP switch
26. ed from automixing When deselected a channel no longer has threshhold sensitive gating and is simply open The channel is no longer part of the NOM equation All other user selectable modes of operation will not affect the deselected channel This function is used in any case where automixing 1s undesirable e g background music source or distant mic source To select channels for automix from the front panel follow these steps 1 Press the select switch All clip LEDs will be lit except for channels that have been excluded from automix Channel 1 s LED will blink periodically AMIX 8 only 2 Press the select button repeatedly until the clip LED for the desired channel is blinking 3 Hold the select button for 2 seconds or more to toggle the setting of automix include exclude When the LED 1s on that channel is included and will be automixed If the LED is off that channel will be excluded from automix This process is also available through RS232 commands 3 8 AMIX Software Version 12 3 4 5 67 8 AMIX Softvvare version is indicated by patterns in o C C ww Ww Ww 959 the LEDs on the front panel of the unit during power gt lt v ww Ge WW version 4 0 up or during reset O O O Q9 O OQ eso 41 12 3 4 vc Q o d version 3 0 lt x 1 version 4 0 gt wv ts w vession 4 1 EL e wv ts version 4 2 14 intelix AMIX Series Automatic Mic Line Mixer User Manual 4 0 Installation of the AMIX Mi
27. er is the mono sum of the R and L RCA jack inputs The XLR jack for this channel accepts only mic level inputs 4 4 Connect Output A connection should be made between the Master Output XLR Jack and an input jack of the amplifier or other downstream equipment Press Output Pad Microphone Line Switch to appropriate position in for line level output 0 dBu or out for mic level 50 dBu output 4 5 Power Up 4 5 1 Connect the mixer power supply Connect the mixer s power supply to an AC power outlet and then to the AC Power Jack on the far left es side of the rear panel paf 4 5 2 Power up the mixer 1 Press the Power Switch to the in position the power indicator LED will light 1f mixer is powered 2 Set the Master Output Volume Knob to 7 3 Power up the external amplifier Master pwr 16 intelix AMIX Series Automatic Mic Line Mixer User Manual 5 0 Gain Structure To obtain the best performance from your Intelix AMIX mic line mixer you should first understand the basic gain structure of the unit There are four stages of gain adjustment labelled 1 through 4 in the drawing below 1 channel input gain trim control this rear panel potentiometer controls the gain of the microphone preamplifier 2 channel volume knob this front panel potentiometer controls through the channel VCA the amount of channel that is fed to the mixer s summing bus 3 master volume control this f
28. extra mixer input 10 5 1 Tapping and patching with the AMIX LINK The AMIX LINK allows the user to tap 1nsert or patch an external device into the mixer audio output path In order to use the insert or patch capabilities of the AMIX mixers you must remove jumper JI Tapping the mixer output routes the mixer output to an external device such as a recorder but does not return the signal to the mixer from the external device A tapped output s level 1s not controlled by the mixer The external device determines the final level A diagram of a tapped installation follows Patching the mixer output routes the output signal to an external device which does return the signal to the mixer A patched output s level 1s controlled by the mixer A diagram of a patched installation follows intelix 37 AMIX Series Automatic Mic Line Mixer User Manual 38 Mixer Inputs Recorder AMIX Mixer Recorder input An example of a tapped installation The mixer output via the Link Out port 1s sent to the recorder which has final control of the audio level since the signal never returns to the mixer Mixer Output Amplifier Input Mixer Inputs Equalizer AMIX Mixer AMIX Link Module Link Out port EQ input Amplifier EQ output Insert Port An example of a patched installation The mixer maintains control of the final volume sent to the amplifier since the external Equalizer returns the equalized audio to the mixer through the Insert p
29. grammer to the AMIX mixer Usually this is a laptop PC 10 3 6 Control pin port description The Control Pin Port provides direct connections to the manual control functions on the AMIX main circuit board Controls attached to this port control master volume as well as individual channel volumes and muting for channels 2 4 6 and 8 on eight channel mixers and channels 1 2 3 and 4 on four channel mixers The pin assignment of the Control Pin Port is Shown below Control Pin Port pin assignment ooooooooooooooo ooooO r g g 2 4 g 4 6 g 6 8 g 8 82 m p m 8 8 m n n n n n n S n 8 n n t d H d y H d W H d W H d W d t d t d d i i io o i i i r r Ww g p 8 P P g g p h e h e h e h e H W C g T h h 10 4 Connecting AMIX LINR Ports This section explains how to wire and use each port on the AMIX LINK 10 4 1 Connecting to the Gate Logic Output port To make connections to the Gate Logic Output port use a jeweler s screwdriver to loosen the top screw corresponding to the desired channel insert a stripped 18 22 gauge signal wire into the back of the connector pin and retighten the screw Repeat for each channel to be con nected The wire from the channel becomes active high when that channel 1s gated on This 5V TTL signal may be used for any signaling or DD control function 1 e LEDs 5 Volt logic and CO relays C The Gate Logic Output port pinout 32 intelix AMIX Series Automatic Mic Line Mixer User Manua
30. hat speaking into it causes no other mic to come on Le the Signal Clip LED Red for that only that channel 1s lit If other mics come on then re adjust the gain for those channels decrease gain by adjusting the rear panel pot Repeat for each individual mic Note When changing the mixer from stand alone to linked operation or vice versa the channel isolation procedure may have to be performed again 7 2 Fine Tuning AMIX Functions 22 AMIX mixers operating in the automatic mix mode have several features vvhich require additional adjustment in order to optimize the mixed sound Because the signals are mixed automatically any adjustment to the gain of one channel will influence all the others making such a change may necessitate making changes to the settings of other channels There are two potentiometers pots on the front panel see Section 2 2 that may need adjust ment especially when linking or unlinking mixers or changing the status of functions such as Last Mic On The relative values at which the pots are set can easily be gauged during adjustment using the red clip channel LEDs The LEDs act as a temporary bargraph for the two pots when the pots are full on the LEDs are all lit AMIX 4 has four LEDs and AMIX 8 has eight LEDs When the pots are full off none of the LEDs are lit This bargraph function begins when the pots are rotated and lasts for a few seconds after the adjustment stops Adjust these pots by powering
31. ixer User Manual 2 0 Panel Descriptions 2 1 Mixer Front Panel AMIX 8 shown S StatRst Select 12345678 Ti Fa CN fF e C CI COS a A0 Ne e Ne ia JI xo ese Nu kl a NS hz ed O O Q O O O O e O O o O O O O Q Low Low Low Low Low Low Low Low 1 Cut 2 Cut 3 Cut 4 Cut 5 Cut 6 Cut 7 Cut 8 Cut l 3 N ig SH ml Tel el ol e e intelix me Atten Engage ate the mix 9i as CX t N 4 oO p Ze a Master pw CS Q 0 APHEX joo Aural Exciter imi 18 12 Channel Volume Knob four on AMIX 4 eight on AMIX 8 controls volume of channel input Signal Present LED Green if lit indicates at least a 10 dB input signal Signal Clip Gate On LED Red if lit indicates a 18 dB or greater input signal pos sible signal distortion If automix 1s enabled LED indicates channel on status Low Cut Switch helps eliminate low frequency noise rumble etc Aphex Aural Exciter Switch improves quality of output signal by adding supplementary harmonic information Output Limiter Switch eliminates clipping distortion of output by controlling dynamic range LED Bar Graph Output Meter displays output signal level in decibels ranging from 18 green to 12 red dB Master Output Volume Knob controls output signal level Power Indicator LED red displays powered state Lit when power is on Power Switch Button push to power unit in position Push to power
32. l AMIX LINK mn AMIX LINK External Circuits External 45V 45V Se Circuits plo plo gt 4700 f 4702 99 i i 5V I logic I i gates I 1 8 41002 4 d GR p2 gt pl v pl v Example of the Gate Logic Output port Example of using the Gate Logic Output used to control LEDs Port to drive 5V logic circuits Note that the logic outputs of the Gate Logic Output Port are active high AMIX LINK 5V External Pl Circuits DW gt na Relays 1 8 i Relay 1 An example of using the I Relay Drive control port to control a i immi max relay circuit I mum per channel s xn p2 10 4 2 Connecting to the ReO port When remote control of all channels levels 1s required the ReO port can be used to connect an Intelix mini mixer to the AMIX mixer This 1s accomplished by inserting an RCRJ11 adap tor into the ReO port of the AMIX LINK Then the cable provided with the mini mixer can be connected between the adapter and the mini mixer The AMIX mixer levels are now fully controllable from the remote mini mixer A stack of mixers cannot be controlled with a single mini mixer Le there must be one mini mixer per mixer chassis intelix 33 AMIX Series Automatic Mic Line Mixer User Manual 34 IN4001 diode Ground White Blue d data 2 data 3 AMIX ReO port adaptor socs a j oen wiring diagram clock 5 p RJ12 Jack Typical connection of a mini mixer to the AMIX mixer using the PRJ12 DB9 F ad
33. mporary bargraph are lit Note When either the hold time pot or the off attenuation pot are turned the red clip LEDs become a temporary bargraph indicating the setting of the pot If the amount of hold time is set too short the mic turning on and off may cut out parts of what is being said Set up the hold time using one channel Watch the clip LED associated with that channel to see how much time elapses between the end of sound input and the LED going off when the LED is lit the mic is on Hold Time Attenuation Amount Potentiometer RP 1 Potentiometer RP 2 3 4 Off Attenuation Amount Potentiometer This pot RP2 controls the level to which the signal of an open mic 1s reduced when it is not active not gated on Reducing the signal rather than turning the mic off completely makes the gating off and on less obvious resulting in a smoother sound The amount of reduction 12 intelix AMIX Series Automatic Mic Line Mixer User Manual available using the pot ranges from 0 to oo dB The factory setting is oo dB 1 e all tempo rary bargraph LEDs are lit Press reset to check the current setting Note If the off attenuation level 1s set too high the amount of gain possible before feedback will be reduced When Last Mic On 1s active there will always be an open mic and therefore some background noise will always be present In this case it may be useful to increase the Off Attenuation amount set it near 00 dB to reduce the level
34. nd volume control 25 5 9 ER BOSCOS M EE 25 5 4 Master Output Insert EE 26 9 0 Passive Mixer Linking ssnin aaa 27 9 0 Passive NIX eT Bet EE Zi DOE IG eh beanie ERC EE 21 2 2 Connectune The Cables Ee 24 10 0 AMIX DEUNK MOGOGU E ieri eee eria rb etn NIE ETE ae Yu YE UE UV uP EF YU ONE EVE xE Le masa 28 0 0 AV EEX TEMIN Mo GUTS escuts e t aut adiu au un REV e EU IU E teneo 28 IOT Ork Start Tor EE D EEN 29 4 intelix AMIX Series Automatic Mic Line Mixer User Manual DOTT Instalime ie AMBCGLINE io soc bien e n aeta npe coude ter Dust inum t nda ig 29 10 1 2 Set no The Mee 29 II Connectime the Control Cal E 29 10 14 Connecting tho audito e E 29 10 2 Tnsta lanon of ee 30 ON diti Sca INO tits autoestima 30 10 2 2 Remo ke ER DEE 30 10 3 AMIX LINK Connector Fleet o eoe erbe oo e EYE Tx ERI ree e ERE EE eet EE 3l 10 3 1 Gate logic output port descrmmton 31 10 3 2 M out S in and M in S out port descrmton 3l 10 3 3 Insert link in and link out port descrmptpon ee eeeeeeeeeeccceeecaeeeeeecceeeeeeaas 3l 103 4 The ReO port descriptis EE 31 103 5 The R52 32 port ESCRIU EE 32 103 06 Control pm port REENEN 32 104 Connecting RTE Ee puit aioe dodo eui occu uda 32 10 4 1 Connecting to the gate logic output port 32 LOA 2 Comme cine e the Re DO o uitae to o HX ei a e ce Coe f o eae 33 104 5 Connec ng 10 the Ee 34 10 44 Onn tiie to the contol i OL EE 35 10 4 5 Wiring external devices to the control pin port 3
35. ol is now connected Note if the selected channel is the Master channel i e the pot uses pins mstr High and Mstr Wiper then the remote pot will control the master volume from the mixer Ground intelix 35 AMIX Series Automatic Mic Line Mixer User Manual 36 Wiring diagram for a remote mute switch When the switch is depressed the channel to which it is connected will be muted until the switch is released Connect a jumper wire between the selected channel s high pin and wiper pins Connect one end of the mute switch to the channel s wiper pin the same pin that is jumpered to the high pin Connect the other end of the remote mute switch to the channel s ground pin The mute switch for the selected channel is now wired Wiring diagram of combined remote volume control and remote mute switch Depressing the switch will mute the selected channel until the switch 1s released Then connect one end of the muting switch to the channel s wiper pin the same pin that already contains the wiper connection of the volume control pot Connect the other end of the mute switch to the channel s ground pin The remote volume control and the remote muting switch are now wired Ground 10 4 6 Setting internal jumpers for the control pin port For each channel using a remote volume control a jumper must be removed from the AMIX module circuit board inside the mixer chassis These jumpers are on connector SK 12 on the
36. ort When a tapped installation 1s desired the audio signal 1s taken from the Link Out port and routed to the external device In a patched installation the audio signal 1s taken from the Link Out port and routed to the external device which sends the modified signal back to the mixer through the Insert port Note When using the patching technique both jumper J1 Section 10 2 2 on the AMIX mixer circuit board and jumper J5 on the AMIX LINK must be removed 10 5 2 Using the Link In port as a balanced line input If an additional balanced line level input is needed the Link In port will serve this function This input goes directly to the summing bus and has no input volume control thus input level control must be provided by the input device The Link In Port is an ungrounded differential input To correctly wire this input to the AMIX LINK RCA port follow the following direc ons intelix AMIX Series Automatic IMic Line Mixer User Manual 10 5 2 1 If your source is balanced V Tie the braided shield to ground at the source end and leave it unconnected at the AMIX Link Module end V Tie the positive signal lead to an RCA connector center pin V Tie the negative signal lead to the RCA connector case Balanced source hookup RCA Plug Balanced Source 10 5 2 2 If your source is unbalanced V Tie the ground lead to the RCA connector case V Tie the positive signal lead to the RCA connector center pin
37. ote control have full control over the channel s volume Connecting a remote control devices to the AMIX LINK Control Pin Port requires two steps Wiring external devices to the Control Pin Port pins Setting internal jumpers Note Wiring for the Priority Override Feature For a full explanation of the priority override feature please see section 3 6 When using priority override with a Link Module connect the remote switch across pins 1 and 2 rmtswitch and gnd of the Link Module s Control Pin Port 10 4 5 Wiring external devices to the control pin port The following three figures explain how to make the connections to the pins of the Control Pin Port to implement the remote volume and muting control functions The connector con sists of twenty screw type connections Connection to a pin 1s made by loosening the screw on top of the connector with a jeweler s screwdriver inserting a stripped wire into the pins opening at the side of the connector and retightening the screw The connectors are most easily wired with 18 24 gauge wire and each pin will accept two of any of these wire sizes Wiring diagram for a remote volume control Connect one end of a 10 KQ potentiometer pot to the High pin of the channel to be controlled Connect the other end of the pot to the adjacent ground pin connect the pot s wiper connection to the channel s wiper pin All ground pins are equivalent and can be used inter changeably The remote contr
38. ow how to connect a single channel for remote muting Repeat this process for each channel to be remotely muted 24 intelix AMIX Series Automatic Mic Line Mixer User Manual 1 Connect a wire from the high pin of the channel to be muted 2 Connect the other end of that wire to the wiper pin of the channel to be muted 3 Connect a wire from one side of the switch to the wiper pin of the channel to be muted the same pin as step 2 4 Connect a wire from the other side of the switch to a ground pin on the DB25 connector 8 2 3 2 Wiring an external combination mute switch and volume control The following instructions show how to connect a linear 10kQ pot to a single channel for remote muting and a remote mute switch Repeat this process for each channel to be remotely controlled 1 Remove the channel s jumper from P12 2 Connect a wire from one side of the switch to the wiper pin of the channel to be muted 3 Connect a wire from the other side of the switch to a ground pin on the DB25 connector 4 Connect a wire from one end of the pot to the channel s high pin 5 Connect a wire from the other end of the pot to a ground on the DB25 connector 6 Connect a wire from the wiper of the pot to the channel s wiper pin on the DB25 connector Ground 8 3 Circuit Board Map The following drawing shows the location of several components on the AMIX circuit board which are user accessible to fine tune some AMIX functions The com
39. ponding Gate Logic Output pin 1s driven high Pin assignment of the Gate Logic Output port viewed from the back of the AMIX LINK 10 3 2 M out S in and M in S out port description The M out S in Mosi and M in S out Miso RJ12 connection ports are used in linking multiple AMIX mixers Mosi and Miso carry control signals around the control loop of the linked mixers 10 3 3 Insert Link In and Link Out port description The Link In and Link Out ports are used to carry the audio signals among the linked mixers For each mixer in the stack the Link In port is connected to the Link Out port of the previous mixer in the stack As a secondary function the Link In and Link Out ports are used for the external equipment audio patching function In this case the Link Out port is used as an audio patch out port It is used in conjunction with the Insert port to provide an input and output for the patching function The right side of the AMIX LINK showing the Link In Link Out and Insert ports Link In Link Out Insert 10 3 4 The ReO port description The ReO port allows the user to connect an Intelix mini mixer controller to the AMIX The mini mixer is a small portable controller This device permits all AMIX channel levels includ ing the master to be adjusted from a remote location intelix 31 AMIX Series Automatic Mic Line Mixer User Manual 10 3 5 The RS232 port description The RS232 port is used to connect an external pro
40. ponents include potenti ometers RP13 and RP14 as well as the ground lift jumper J4 and the Premaster Insert Patch Jumper J1 Some components in this picture may be hidden from sight by the AMIX board intelix 25 AMIX Series Automatic Mic Line Mixer User Manual GROUND LIFT 14 JUMPER m 60 PREMASTER INSERT PATCH JUMPER 9 9 OUTPUT CHANNEL INSERT LIMITER PATCH PINS THRESHOLD 9 o POTENTIOMETER 7 P20 z el DC CONTROL Kee LINE PINS P12 6000000008 pid 9000000000 J3 AVERAGE BAR GRAPH JUMPER DETECTOR J2 PEAK BAR GRAPH JUMPER RP 13 OO OO OO OO OO PINS 66 CN t 8 OO e 00 d LED BAR GRAPH METER ee APHEX OUTPUT MASTER der SWITCH AURAL LIMITER OUTPUT Se EXCITER SWITCH VOLUME BUTTON SWITCH RNOB 8 4 Master Output Insert Patching If no AMIX LINK is being used on the AMIX mixer you can do master output insert patch ing To use the patching feature of the AMIX mixer follow these directions 1 Remove the top of the mixer chassis and remove jumper JI 2 Connect a wire from pin 12 of the DB25 connector to the input of the destination device 3 Connect a wire from the output of the destination device to pin 13 of the DB25 connector summing Amplifier This drawing illustrates the function of the patch ing feature of the AMIX mixer The summed bus output 1s sent to an external device on pin 12 of the mixer s DB25 The external device s output 1s sent back to the mixer on pin 1
41. ront panel potentiometer controls through the master VCA the amplification of the summing bus to the output connector 4 external amplifier volume control not part of the mixer sets the final listening level of the loudspeakers The goal of setting up the mixer s gain structure is to adjust these four controls for the desired volume while maintaining the best possible signal to noise ratio S N through the mixer This is done by setting controls 2 and 3 at 7 where S N and headroom are optimized using controls 1 and 4 to achieve maximum gain before distortion Gain structure must be set with all AMIX functions disabled In order to maintain the highest level of S N in the mixer the audio signals are never brought through the front panel controls of the Intelix mixer Instead each front panel pot controls a Voltage Controlled Attenuator VCA which controls the associated amplification stage The channel VCAs do not control an amplifier but are attenuation only devices which determine the amount of each channel s contribution to the summing bus Channel Input gain trim controls Microphone preamps Audio Inputs Channel VCAs i Ce 2 Channel volume knob cm x P d 4 external amp Mes y Master volume control Output Amp 3 Master volume control Master VCA intelix 17 AMIX Series Automatic Mic Line Mixer User Manual 5 1 Setting the AMIX Mixer Channels Preliminary steps 1 Connect audio sources
42. round The female DB25 pinout for AMIX 4 mixers The view is of the rear panel Header P12 is inside the mixer chassis and contains jumpers that must be correctly set for external control intelix OOOO AOCU Balanced link input Balanced link input Master Volume Wiper Master Volume High Channel 8 Wiper Channel 8 High Channel 6 Wiper Channel 6 Higl Channel 4 Wiper Channel 2 Wiper Manual Duck Switch Link Out Insert Patch Out 0000000000000 Insert Patch In Ground Ground Ground Channel 4 High Ground OG E oO GO GG GO GO Q e The female DB25 pinout for AMIX 8 mixers The view is of the rear panel DC CONTROL LINE PINS P 12 QOOOOOOOOOOOQOQOO V VV Oo O O L L L 1 3 2 Aro o TO A TO oro QOOOOOOOOQOQO MA L G G O A P R R L S HM O O 8 T E U U E X JT NN R D D REAR LEFT RIGHT FRONT 23 AMIX Series Automatic Mic Line Mixer User Manual 8 2 DC Control AMIX Series mixers are configurable for external control of individual channel volume by a DC voltage Up to 4 input channels and the master output volume can be connected to remote controls simultaneously Note The following instructions assume that the remote control device is a 10KX2 potenti ometer If another device is used these instructions may require modification 8 2 1 Remote volume control When a remote control device typically a linear 10kQ pot is ins
43. s in a compact arrangement thereby generating more heat than the average electronic device It should be located where it will be well ventilated and far from other heat generating equipment such as amplifiers The main ventilation ports are in the sides of the chassis To operate properly they should be kept clear of other components cables etc When several AMIX mixers are located to gether the amount of heat generated may be difficult to dissipate 1f the units are stacked directly on each other Ensure adequate ventilation is provided on the sides ambient air temperature does not exceed 72 degrees F and an open rack space is left above and below the units intelix 1 AMIX Series Automatic Mic Line Mixer User Manual To minimize hum in the system avoid placing cables near EMF producing devices such as electrical motors fluorescent lights AC power lines and SCR dimmers Keep the mixer and other equipment clean and free of dust by occasionally wiping with a soft damp cloth Protect the mixer from electrical damage by disconnecting it from the power source whenever it will be unused for a week or longer 1 3 Quick Start for the AMIX Mixer 1 3 1 Unpack and connect 1 Check mixer for shipping damage 2 Turn both mixer and amplifier volume controls to zero 3 Connect inputs and set the input pad switch for each channel to the appropriate level either mic or line Set all unused channels to line level 4 Connect output
44. t served control to be effective the Hold Time Pot should be set near the longer end of its range 1 to 1 7 seconds 1 e the majority of the LEDs should be lit on the temporary bargraph 3 6 Priority Override Channel 8 on AMIX 8 or channel 4 on AMIX 4 becomes active while all other channels are muted This mode is activated by an external switch connected to the DC control connec tor on the rear of the mixer This function is used when chairperson priority 1s necessary This AMIX function allows an external user wired switch to override the automatic mixing function by forcing Channel 8 to be on and all the other channels to be off In stand alone mode the switch is wired to the mixer that the talker is using When mixers are linked the switch must be wired to the master mixer to be effective The following diagram shows the wiring of the switch intelix 13 AMIX Series Automatic Mic Line Mixer User Manual o o Note when a AMIX LINK is installed the 10KQ Aux pins used for priority override are pins MA I rmtswitch and ground on the Control pin port Pin 11 round Pin 24 A DB25 ON Priority LL Override EE Button a o TES Jol R Note The DB25 to which the switch is wired is the ower one 1 e the DB25 used for DC VCX Control Connector gt el SES Jo LO control connections mor esses 3 7 AMIX Channel Exclusion An individual channel may be deselect
45. talled it controls the percent age of the volume possible as defined by the Volume Control Knob on the front panel for that channel For example if the Volume Control Knob is set at 8 and the remote pot is set at 5 the result will be 4 5096 of 8 Only when the Volume Control Knob is set at 10 does the remote device have full control over the channels input level 8 2 2 Connecting a remote volume control The following instructions show how to connect a linear 10kQ pot to a single channel as a remote volume control Repeat this process for each channel to be remotely controlled 1 Remove the channel s jumper from header P12 see section 8 3 for locations 2 Connect a wire between one end of the potentiom eter and the channel s high pin on the DB25 connector 3 Connect a wire between the other end of the potenti ometer and a ground pin on the DB25 connector 4 Connect a wire from the wiper of the potentiometer and the channel s wiper pin on the DB25 connector Ground 8 2 3 Remote mute control All channels whose high and wiper pins are brought out to the DB25 connector can be re motely muted This is done by connecting a switch or other dry contact closure between the channel s wiper pin and ground Shown are two ways to wire a channel for external muting Note that remote mute control can be used alone or in combination with remote volume control 8 2 3 1 Wiring an external mute switch The following instructions sh
46. to channel inputs 2 Connect the mixer output to an external amplifier 3 Set input mic line switches for each channel and the output 4 Turn on phantom power switch if condenser microphones are 1n use 5 Turn the master volume control to 0 For each channel follow these steps 1 Set the channel volume control to 0 2 While driving the channel input at its normal level adjust the rear panel input gain trim control clockwise until the peak red LED for the channel is illuminated Then turn the input gain trim control counterclockwise until the red LED goes out Note that the signal present green LED will stay lit during this procedure 3 Turn the master output volume knob to 7 4 Adjust external amplifier volume to the desired acoustic level 5 Adjust individual channel volume knobs to the desired levels as indicated on the bar graph the bar graph monitors the output but if one channel is adjusted at a time the graph will reflect only that channel Red Green oZ Gain 2 sO o 18 intelix AMIX Series Automatic Mic Line Mixer User Manual 6 0 Mixer Fine Tuning 6 1 Low Cut Switch To remove excessive bass response from an individual channel press that channel s low cut switch The low cut feature helps eliminate low frequency noise signals of 150 Hz or lower e g ventilation rumble This feature is primarily used with mic level inputs and is particularly effective with hand held micro
47. ut to it Off Attenuation Potentiometer controls the amount from 0 to 00 dB by which the level of an open mic is reduced when it 1s not gated on AMIX Enable Disable LED Red indicates AMIX modules functional state Lit when AMIX 1s enabled Enable Disable Button push in position to enable AMIX functions Push Cour position to disable intelix AMIX Series Automatic Mic Line Mixer User Manual 2 3 Mixer Rear Panel AMIX 8 shown Di oti f 8 xO T o P a P o 4 e S a A WW ain Gain Gain Gain Gain Gain Gain Gan Ze e D e e e e a i O o o e Mic fe Mich Mic pu O Mic pm Mic Mic qu Mic pu O Micpa Linek inep Lin Lineb Linet ps Aic c c Line unek Mic Liner Line eP Linok Ground Lift Jumper jumper J4 connects chassis to electronic ground AC Power Jack power supply input accepts a 4 pin DIN connection from an 18VCT 1 5 Amp transformer Phantom Power Switch when activated supplies 15V DC power for condenser microphones to all channels with the mic line switch set to mic position El Master XLR Output Jack balanced male XLR jack for master bus output Master Mic Line Switch selects master output to either mic level 50 dBu or line level 0 dBu 1 DB25 Control Pin Connector connection points for DC remote control and insert patching and linking AMIX LINK Connector location for installing AMIX LINK El RCA input jacks stereo line level input connections for ch
48. xer 4 1 Unpack Connect and Power up A Take the mixer out of its box and inspect for shipping damage If there 1s obvious physical damage contact Intelix before proceeding B Turn all mixer Volume Control Knobs individual channels and master to zero Turn external amplifier volume controls to zero Li 1 rbd Master pw 4 2 Connect Inputs For each input channel up to 4 for AMIX 4 up to 8 for AMIX 8 insert the XLR input connector into the desired XLR Input Jack on the rear panel O Od Gain e Z C O Mic lin Linek Press the XLR Input Pad Microphone Line Switch to appropriate position in for line input or out for mic input Note that the input from some microphones is actually close to line level 20 dB and for such mics the Switch should be at line Note Set all unused channels to line level 4 3 Channel 4 on AMIX 4 or 8 on AMIX 8 This channel accepts two types of inputs Two inputs may be connected to the channel at the same time but only one at a time may be mixed The position of the channel s XLR Input Pad Microphone Line Switch determines which input is mixed into the output in the mic position it uses the input connected to the XLR Input Jack in the line position it uses the input connected to the RCA Jacks intelix 15 AMIX Series Automatic Mic Line Mixer User Manual Note This channel accepts stereo inputs via the RCA jacks The channel s output to the mix

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