Wheatstone Corporation WheatNet-IP BLADE3, Техническое руководство

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WheatNet-IP BLADE 3 / Jan 2016
A P P E N D I C E S
Category 2: Audio Associated Logic
There­are­many­logic­functions­that­are­associated­with­or­tied­to­specific­audio­signals.­
You­may­have­a­START­or­a­STOP­logic­function­that­associates­with­a­specific­CD­player­
or­Automation­machine,­or­ON­and­OFF­logic­functions­that­associate­with­a­control­sur -
face­fader­channel.­In­the­good­old­days­you­would­have­to­wire­a­multi-conductor­control­
cable­from­the­logic­ports­on­the­machine­to­the­logic­ports­on­your­console.­Once­you­
were­done,­those­logic­connections­would­only­work­for­that­one­machine­and­one­fader­
channel;­if­you­patched­your­audio­to­a­different­channel,­the­logic­wouldn’t­work­right­
anymore.­For­this­reason­(and­to­make­it­easier­to­set­it­all­up­in­the­first­place),­general­
practice­was­to­wire­all­of­these­connections­up­to­punchblocks­so­connections­could­be­
changed­via­punch­downs­rather­than­rewiring­complicated­multi-pin­connectors.
It’s­much­easier­with­the­WheatNet-IP­system.­First­of­all,­many­devices­(including­
Wheatstone­control­surfaces)­now­support­logic­control­directly­over­Ethernet­­connections,­
so­separate­logic­wiring­isn’t­needed.­For­that­equipment­that­still­requires­physical­logic­
connections,­WheatNet-IP­devices­provide­12­available­logic­connections­on­every­BLADE­3,­
and­the­system­provides­for­audio­associated­logic.­That­means­the­only­physical­wiring­
you’ll­need­for­these­devices­is­a­direct­connection­from­the­device­logic­connector­to­the­
RJ-45­jacks­on­a­BLADE­3.
Here’s­how­it­works.­Each­audio­signal­within­the­WheatNet-IP­system­–­that’s­­every­
source­and­every­destination­including­control­surfaces­–­can­have­up­to­12­different­
logic­functions­(from­a­list­of­500­different­types)­associated­with­it.­Whenever­an­audio­
crosspoint­connection­is­made­between­a­source­and­a­destination,­the­system­looks­for­
matching­logic­functions­(for­example­START­and­STOP).­For­every­matching­function,­
a­virtual­logic­connection­is­established­such­that­the­logic­input­will­control­the­logic­
output.­If­the­audio­connection­is­changed,­the­system­looks­for­matching­functions­in­the­
new­connection.­In­this­manner­the­logic­functions­are­associated­with­or­attached­to­the­
audio­devices,­and­hence­follow­with­whatever­audio­connections­are­made.
This­makes­it­easy­to­enable­complex­logic­functionality­without­a­lot­of­physical­wiring,­
and­minimizes­the­need­for­punchblocks­or­other­cross­connect­and­fan­out­wiring­devices.
For­an­example,­let’s­set­up­our­system­so­that­a­control­surface­ON­button­will­start­a­
Denon­DNC620­CD­player.­This­machine­has­a­D-sub­25­logic­connector,­with­a­START­
function­located­on­pin­#9­and­Command­Common­located­on­pin­#23.­A­momentary­
­connection­between­pins­9­and­23­will­cause­the­machine­to­begin­playback.­Let’s­­assume­
that­the­CD­player­is­located­in­our­Air­studio,­which­has­an­LX-24­control­surface­and­
88cbe­console­BLADE­#1.­We’ll­say­that­the­CD’s­stereo­audio­­output­is­connected­to­
stereo­input­7­on­BLADE­#1­and­we­have­given­this­source­signal­the­obvious­name­
“CD1.”­Let’s­further­assume­that­we­have­already­used­the­first­two­logic­ports­connection­
on­this­BLADE,­so­we­want­to­use­the­therd­logic­port­connection,­pin­#4,­to­START­the­
DNC620.­Your­system­will­likely­have­­different­BLADE­and­port­numbers­than­these­in­
the­example;­just­substitute­your­ID­#s­as­necessary.
First­we­need­to­wire­the­logic­ports,­connecting­pin­#4­and­#1­of­the­first­logic­­connector­
on­BLADE­#1­to­pins­#9­and­#23­respectively­on­the­DB-25­connector­of­the­DNC620­
machine.­That’s­all­the­physical­wiring­we­will­need­to­do­for­this­function.