MEDIATECHNOLOGYSYSTEMS INC. ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! MANUAL& AMX0.2CN 8x2… 24x10 Automixer & CobraNet™ Interface 5818 CALVIN AVENUE, TARZANA, CALIFORNIA 91356 U.S.A. www.mediatechnologysystems.
! FCC&Compliance&Notice&&&Interference&Statement.& ! ! THIS!DEVICE!COMPLIES!WITH!PART!15!OF!THE!FCC!RULES.!OPERATION!IS!SUBJECT!TO!THE!FOLLOWING! CONDITIONS.! ! THIS! DEVICE! MAY! CAUSE! HARMFUL! INTERFERENCE.! THIS! DEVICE! IS! DESIGNED! TO! ACCCEPT! AND! OPERATE! WITH! ANY! INTERFERENCE! RECEIVED.! ! THIS! INCLUDES! INTERFERENCE! THAT! MIGHT!CAUSE!UNDESIRED!OPERATION.
Explanation&of&Symbols& & ! ! TO!PREVENT!ELECTRIC!SHOCK!DO!NOT!REMOVE!COVER.! NO!USER!SERVICABLE!PARTS!INSIDE.!!REFER!TO!QUALIFIED! AND!CERTIFIED!SERVICE!PERSONNEL.!! ! CAUTION! ! RISK!OF!ELECTRIC!SHOCK! DO!NOT!OPEN! ! ! ! The!exclamation!mark!in!a!triangle!is!intended!to!alert!the!use!to!the!user!to!the! presence!of!important!operating!and!maintenance/service!instructions!in!this!manual.
! ! Table&of&Contents& 1! WELCOME! 5! 1.1! IMPORTANT!SAFETY!INSTRUCTIONS! 1.2! DECLARATION!OF!CONFORMITY:! 1.3! HOW!TO!USE!THIS!MANUAL.! 5! 5! 5! 2! SPECIFICATIONS! 6! 3! INSTALLATION! 7! 3.1! USA!AND!OTHER!“TYPE!A,!B”!(NEMA!1B15/5B15)!REGIONS! 3.1.1! USA!DECORA®!FACEPLATES! 3.1.2! USA!MOUNTING!ENCLOSURES! 3.1.3! USA!LABELLING! 3.2! UNPACKING! 3.3! INSTALLING!THE!INTERFACE! 3.3.1! ANALOG!INPUT/OUTPUT!WIRE!AND!CONNECTORS:! 3.3.2! AMX0.2CN!OUTPUT!CONNECTIONS! 3.3.3! GROUND!PIN! 3.3.4! AMX0.
! 1 Welcome& 1.1 Important&Safety&Instructions& & & & & & & ! Important!Safety!Instructions:! Read!these!instructions.! Keep!these!instructions.! Heed!all!warnings.! Follow!all!instructions.! Do!not!use!this!apparatus!near!water.! Clean!only!with!dry!cloth.! Do!not!block!any!ventilation!openings.!Install!in!accordance!with!the! manufacturer's!instructions.
! 2 Specifications& & & ! The! electrical! specifications! for! the! AMX0.2CN! is! given! below.! The! XLR! output! has! 3! settings,! optimized! for! ProAudio,! MI! (Prosumer)! Microphones! and! Consumer! equipment!respectively.! ! The!RCA!connectors!are!fixed!at!L8dBu!(nominal).
3 Installation& ! 3.1 USA&and&other&“Type&A,&B”&(NEMA&1O15/5O15)®ions& 3.1.1 USA&Decora®&FacePlates& ! The! most! common! decorative! wall! finish! in! the! US! is! the! Decora®! format.! The! AMX0.2CN!is!available!in!sizes!to!suit!the!Decora®!‘2Lgang’!face!plates!widely!available! in! various! finishes! (Brass,! Aluminium,! Plastic,! etc)! and! colors! (White,! Black,! Almond,! Gold,!Silver,!etc)!–!see!Figure 3-1! ! ! Figure 3-1: AMX0.
NOTE:! For! full! FCC/CE! compliance,! the! AMX0.2CN! should! be! mounted! inside! a! grounded!metal!backbox!(see!Figure 3-2!below)!with!metal!conduit!connecting!the!STP! cable!to!the!IT!room.!In!addition!it!is!recommended!to!use!a!clamp!on!ferrite!bead!EMI! suppressor!for!best!noise!immunity!(see.! ! ! ! ! ! Figure 3-2: Example of metal backbox suitable for the AMX0.
Figure 3-3: RACO™ 681 drywall back box. 3.1.3 USA&labelling& ! There!is!a!recessed!slot!at!the!bottom!of!the!AMX0.2CN!interface,!suitable!for!a!1”!wide!x! ⅜”!high!label!see!Figure 3-4.!The!recess!allows!for!labels!of!up!to!5/32”!deep,!which!are! sufficient!even!for!“Traffolyte”!style!engraved!labels!(typically!⅛”!deep)!containing!an! aggressive,!permanent!adhesive.!! Figure 3-4: Graphic showing AMX0.2CN label recess (bottom of fascia plate) with label screw holes.
The!recess!can!also!handle!most!other!label!types!from!recognized!suppliers!such!as! Brady,!Sharpmark!and!others.! ! In!addition,!the!recess!also!has!a!pair!of!mounting!holes,!½”!apart.!These!can!be!used!for! permanently!attaching!labels!with!screws,!but!it!DOES!require!the!dismantling!of!the! ION!interface,!This!approach!is!not!recommended,!as!most!aggressive!adhesives!are! sufficiently!strong!to!require!a!special!solvent!or!tool!to!remove!them.! 3.
3.3.3 Ground&pin& The!AMX0.2CN!has!a!rear!PCB!mounted!ground!pin!–!see!Figure 3-5!below.!Ideally,!STP! cable!should!be!used,!where!the!shield!is!connected!to!a!good!ground!at!the!PoE!switch,! but!it!is!accepted!that!UTP!will!be!used!in!most!situations.!!The!rear!PCB!ground!pin!has! been!provided!as!a!means!of!connecting!the!interface!to!a!good!ground!when!used!with! UTP!cable.!! ! The!ground!pin!should!be!connected!to!the!metal!rear!enclosure!of!the!AMX0.
NOTE:!Failure!under!these!conditions!is!not!covered!under!warranty.!!!Always!check! your!system!grounding.!Never!“lift”!A/C!grounds!on!any!device!in!a!system!in!an! attempt!to!cure!hum!or!buzz,!so!doing!can!expose!users!to!dangerous!and!lethal! voltages.!! 3.3.4 AMX0.2CN&gain&switch&and&indicator& The!XLR!connector!has!a!gain!switch!with!3!positionsLsee!Figure 3-6.!There!is!also!an! adjacent!LED!indicator!to!show!the!gain!setting.
Figure 3-7: Side view showing back can in position 3.3.6 Network&connections&& ! The!MTS!AMX0.
4 Functional&Description& 4.1 Signal&Path&AMX0.2CN&& 4.2 Digital§ion& ! The!AMX0.2CN!is!a!CobraNet™!interface!with!2!analog!Line!level!output!channels.!The! digital!audio!streams!are!sourced!from!the!CobraNet™!interface/CS496112!chipset!and! converted!into!analog!audio.!The!CobraNet™!interface!provides!8!simultaneous!bundle! receivers!with!up!to!8!simultaneous!audio!streams!(see!Cirrus!Logic!UM23!and!PM25! for!full!details!of!the!CobraNet™!chipset!and!protocol).
The!SNMP!controls!include!all!the!standard!CobraNet™!OID’s.!See!Cirrus!Logic’s!UM23! users!manual!for!full!details!of!the!chipset!and!PM25!programmers!manual!for!full! details!of!the!SNMP!controls…http://www.CobraNet™.info/en/products See!Figure 4-1!for!details!of!the!internal!block!diagram!for!the!Digital!Section!I/O.! ! ! ! Figure 4-1: Block diagram showing the Cobranet routing of the AMX0.
4.3 Digital&Signal&processing.& ! The!AMX0.2CN!uses!the!CS496112!chipset,!which!allows!for!>100MIPS!of!digital!signal! processing!(DSP).!! 4.3.1 Automatic&Microphone&Mixer& 4.3.1.1 Overview& ! Before!proceeding!to!the!DSP!schematic,!it!will!be!necessary!to!understand!how!the! Automatic!Microphone!mixer!device!works.!The!input!section!of!the!AMX0.2CN!is! shown!below!(Figure 4-2)!and!has!inputs!1L8!as!audio!in,!outputs!1L8!as!gated!audio!out,! inputs!9L12!as!link!signals!in!and!output!9!as!link!signal!out.
of!local!gates.!! ! 4.3.1.2 Link&Signals&Overview& ! The!Automix!device,!when!configured!as!a!link!master,!features!the!capability!to!receive! link!status!inputs!from!other!Automix!devices,!combine!this!information!from!the! multiple!sources!and!with!local!status!and!produce!operational!parameters!and!a! Master!link!output!which!can!be!fed!back!to!the!other!Automix!devices!allowing!them!to! all!operate!together!based!on!a!common!understanding!of!the!system!state.
! ! 4.3.2.4 Gated&Audio& ! One!output!per!audio!input!channel.!This!is!a!gated!version!of!the!audio!input!channel.! These!outputs!are!connected!to!the!mixer,!which!produces!the!signal(s)!sent!to!the! sound!reinforcement!system.!! ! 4.3.2.5 Link&Output& ! When!this!AMX0.2CN!is!NOT!serving!as!a!link!master!for!the!system,!this!output! communicates!gate!priority!and!background!level!information!to!the!AMX0.2CN!link! master!device.
Default:!Disabled! ! When!enabled,!audio!for!the!channel!is!routed!directly!from!the!input!to!output.!The! gate!is! deactivated.!The!Open!indicator!does!not!light!and!channel!does!not!contribute!to!NOM! count!or! background!level!summing.! ! When!disabled,!the!channel!opens!and!closes!in!response!to!input!level!as!constrained! by…! ! • Priority,! • Maximum!open!mics! • Last!mic!open!logic.!! ! When!open,!Open!indicator!lights!and!channel!is!counted!as!an!open!mic!for!NOM! computations.
Note:!If!Last!mic!on!is!enabled,!the!gate!may!remain!open.!See!Last!mic!on! documentation!for!details.! ! 4.3.3.4 Gate&Hold&time& ! Type:!Time! Range:!10!ms!to!10!s! Default:!1!s! ! Wait!time!in!open!state!for!closing!the!gate!when!input!level!passes!below!Threshold.! Open!indicator!remains!lit!and!channel!is!counted!as!an!open!mic!during!hold!time.! ! 4.3.3.
Bypass!mode.! ! Note:!The!Input!open!indicator!is!available!as!a!‘look!at!me’!trigger!for!camera!presets! during!video!conferencing.!The!indicator!can!be!accessed!using!MTS!Control!(see!“MTS! Cobranet!Interface!Programming!Manual”).! ! 4.3.3.8 Last&mic&on& ! Type:!Toggle! Default:!Disabled! ! When!enabled!the!last!microphone!with!gate!open!will!remain!open!when!the!Hold!time! expires.!The!Open!indicator!will!remain!lit!and!NOM!indicator!will!show!1!and!priority! will!show!0.
Range:!L100!to!+23!dB! Default:!0!dB! ! Scaling!factor!for!internal!background!level!measurement.!Higher!settings!produce! more!aggressive!lifting!of!gate!thresholds!in!the!presence!of!background!noise.! Background!must!also!be!tuned!based!on!mixer!size.!Higher!overall!setting!are!required! on!mixers!with!fewer!active!input!channels.!See!Background!threshold!compensation! below!for!a!more!detailed!description!of!background!level!computation!and!threshold! compensation.! ! 4.3.3.
The!device!uses!this!calculation!to!adjust!effective!gate!threshold!levels.!Background! threshold!compensation!level!is!added!to!the!Threshold!setting!to!produce!the!effective! threshold!used!to!determine!the!signal!level!required!to!open!the!gates.!For!example,!if! Threshold!is!set!to!L10!dB!and!Background!threshold!compensation!reads!L10!dB,!the! effective!threshold!is!L4!dB!(adding!two!equal!signals!produces!a!resultant!6!dB!higher).! 4.3.4 AMX0.2CN&DSP&Operation& The!AMX0.
To!avoid!control!signals!accidently!passing!through!to!the!audio!outputs,!the!AMX0.2CN! ships!with!both!audio!and!control!disabled!to!the!gated!automixer!inputs!5L12.!The! setup!process!is!as!follows…! ! 4.3.4.1 ‘Standalone’&operation& ! One!AMX0.2CN!in!‘standalone’!offers!8!Cobranet!inputs!–!ideally,!this!could!be!used!with! 4!x!ION2.0!to!complete!a!small!meeting!room,!see!Figure 4-6!below.! ! ! Figure 4-6: Application with four ION2.0 and one AMX0.
! Figure 4-7: Application with six ION2.0 and two AMX0.2CN in linked mode! The!linking!process!is!complex,!as!the!AMX02CN!is!a!simple!8x2!audio!device!and! requires!the!configuration!of!multiple!masterLslave!links!and!‘mixLminus’!audio!routing.! The!configuration!process!will!require!the!following,!depending!on!how!many! AMX02CN!devices!are!connected…! ! In!all!configurations…! ! • There!shall!be!only!one!Master!AMX0.2CN! • The!Master!(or!standalone)!AMX0.2CN!has!automixer!“Link!Master”!button!ON.
• input)!and!receiver!Channel!2!is!mapped!to!subchannel!39!(ie,!Cobranet!input! channel!7Lthe!audio!mix!input).! Audio!link!inputs!from!other!Master!or!Slave!units!should!be!in!bypass!at!the! Automixer,!as!they!have!already!been!included!in!the!NOM!calculations.
The!8x8!Mixer!in!the!Master!AMX0.2CN!is!used!to!create!the!audio!mixLminus! feeds!to!each!slave,!where…! ! The!8x8!Matrix!Mixer!output!4!is!sent!to!slave!1!and!will!contain!a!mix!of! channels!1L4!(ie!the!audio!feeds!into!the!master!AMX0.2CN)!plus!Channel! 6!the!audio!feed!from!slave!2.
The!8x8!Matrix!Mixer!output!5!is!sent!to!slave!2!and!will!contain!a!mix!of! channels!1L2!(ie!the!audio!feeds!into!the!master!AMX0.2CN)!plus!Channel! 3!and!Channel!5!the!audio!feeds!from!slave!1!and!slave!3.!The!Cobranet! channel!3!is!sent!to!subchannel!2!of!transmitter!2!(the!transmitter!for! slave!2)! ! The!8x8!Matrix!Mixer!output!6!is!sent!to!slave!3!and!will!contain!a!mix!of! channels!1L2!(ie!the!audio!feeds!into!the!master!AMX0.2CN)!plus!Channel! 3!and!Channel!4!the!audio!feeds!from!slave!1!and!slave!2.
! Cobranet!channel!2!is!sent!to!subchannel!2!of!transmitter!1!(the! transmitter!for!slave!1)! The!8x8!Matrix!Mixer!output!5!is!sent!to!slave!2!and!will!contain!a!mix!of! Channels!1,!3!&!4L!the!audio!feeds!from!slave!1,!slave!3!and!slave!4.!The! Cobranet!channel!3!is!sent!to!subchannel!2!of!transmitter!2!(the! transmitter!for!slave!2)! ! The!8x8!Matrix!Mixer!output!6!is!sent!to!slave!3!and!will!contain!a!mix!of! Channels!1,!2!&!4L!the!audio!feeds!from!slave!1,!slave!2!and!slave!4.
compressor!with!peak!detector!on!each!of!the!two!analog!output!channels!(see!Figure 4-8!below).! ! In!addition,!there!is!an!optional!100mS!delay!that!has!a!separate!feed!from!the!matrix! mixer!and!can!be!used!either!as!an!unprocessed!feed!to!other!AMX0.2CN’s!or!ION0.2’s! (for!sequential!100mSL200mSL300mS,!etc!delays),!or!locally!as!a!monoLsum!delayed! signal.!The!4:2!router!determines!if!the!conventional!or!delayed!feed!is!sent!to!either! analog!output.! ! ! Figure 4-8: Output section DSP of the AMX0.
5 Simple&Configuration&(No&DSP)& & In!some!applications,!the!AMX0.2CN!will!be!used!as!a!simple!2!channel!Cobranet! interface,!providing!local!analog!outputs!(respectively)!and!connecting!to!a!central!DSP! processor.!In!that!situation,!the!DSP!will!not!be!used.!This!Section!covers!the!use!of!the! ION2.0/0.
! ! • • • • • Go!to!Control!Panel!and!then!open!“Network!connections”.! Click!on!the!General!tab!and!open!“Properties”.! Select!“Internet!Protocol!(TCP/IP)”!and!click!on!properties.! Finally,!change!the!selection!from!“Obtain!an!IP!address!automatically”!to!“Use! the!following!IP!address”!and!set!to!your!desired!IP!domain,!eg:L! • IP!address:!192.168.192.50! • Subnet!mask:!255.255.255.
For!WinVista/Win7,!the!line!is!slightly!different,!ie,!change…! ! ! ! to...! ! ! ! Save!the!changed!.ini/config!file!and!exit!Notepad.!The!advanced!features!are!now! enabled.! ! Now!when!you!update!the!firmware!you'll!see!a!check!box!in!the!"Select!Firmware! Version"!dialog!box!marked!"Show!All!Firmware!Versions".!Check!the!box!and!you'll!be! able!to!choose!from!all!the!firmware!versions!stored!in!the!firmware!directory.! 5.
o UnicastMode:!This!value!can!be!used!to!override!or!modify!the!normal! ! unicast!vs.!multicast!implications!of!the!assigned!bundle!number.!The!normal! default!value!is!‘Never!Multicast’.!The!available!options!are:!! Always!Multicast!–!All!bundles!are!sent!multicast!regardless!of!Bundle! number.
• ! Receiver!setup:!This!section!covers!the!CobraNet™!receivers!(see!Figure 5-3).!The! CS496112!chipset!allows!for!up!to!8!receivers,!each!of!up!to!8!channels,!subject! to!an!overall!channel!count!of!2!analog!output!channels!and!8!network!audio! streaming!channels..!The!settings!are:L! o Bundle!number:!Same!process!and!limitations!as!described!in!the! transmitter!section! o Receiver!active:!This!LED!only!lights!if!there!is!a!valid!transmitter!sending! audio!on!that!bundle!address!and!channel.
The!persistence!only!applies!to!Cobranet!settings!and!not!the!DSP! settings.!DSP!settings!will!need!to!be!stored!using!MTS!Control!and!a! Preset!device!(see!Error!!Reference!source!not!found.).! If!the!persistence!tick!box!is!off,!then!no!settings!will!be!saved.! o Mode!Rate!Control:!The!options!are!1.33mS,!2.66mS!or!5.33mS!latency.! Note:!there!are!significant!tradeLoffs!if!changes!are!made!to!the!5.
5.4 Presets& ! The!AMX0.2CN!are!simple!devices!and!do!not!contain!a!host!processor!and!no!access!to! multiple!preset!functionality.!However,!the!Cobranet!flash!can!be!used!to!save!Cobranet! interface!settings!via!“persistence”!(see!previous!section!and!Figure 5-4).!If!the! persistence!option!is!enabled,!then!the!last!set!of!values/settings!can!be!stored!into!the! Cobranet!flash!and!will!be!restored!on!power!up.
6 INDEX& ‘! ‘Standalone’!operation,!24! I! Input!Open!Indicator,!20! ION0.
S! Safety,!5! safety!codes,!11! sensitivity,!10! Signal!Path!ION!0.2,!14! SNMP,!14,!15! Specifications,!6! STP,!11! Subformat!Resolution,!33! T! Three!AMX0.2CN!devices,!26! Traffolyte,!9! Transmitter!setup,!33! Two!AMX0.
