Wisdom AUDIO SYSTEM CONTROLLER SC-1 - Using Single-Ended Amplifiers

16
Using single-ended ampliers Ifyourpoweramplierdoesnothavebalancedinputs,theadapterused
toconvertfrombalancedtosingle-endedmust“oat”Pin3(theinverted
signal).Thiscaneasilybecheckedwithanohmmeter:theimpedancebe-
tweenPin3andeitherthecenterpinortheshieldskirtontheRCAshould
beinnite.TyingtheoutputofPin3toground(assomeadaptersdo)will
compromisetheperformanceoftheSC-1.Shouldyouneedthem,prop-
erlywiredadaptersareavailablefromWisdomAudioforanadditional
charge,ortheycanbepurchasedonlineat
http://www.markertek.com/Connectors-Adapters/Audio-Adapters/XLR-to-
RCA-Adapters/Switchcraft-Corporation/322X.xhtml.
5 USB Port
ThisUSBportisusedbyyourinstallertoconnectaWindows-compatible
PCforsetupandcalibration.Itprovidestwo-waycommunicationbetween
theSC-1andthecomputerthatisusedforadjustingthemanyparameters
ofthesystemcontroller.
6 RS232 Interface
TheRS232interfaceallowsanexternalcontrolsystemsuchasAMX,Con-
trol4,Crestron,orSavanttocontroltheSC-1.Allbasicoperationalmodes
aresupported(operate,standby,selectingsetupmemories).
WhentheSC-1isrstpoweredup,itwillidentifyitselftothecontrol
systemviatheRS-232port,sendingeither
 WisdomAudioSC-1  or WisdomAudioSC-1
Ready...ERROR
…dependingonwhetherthereisatleastonesetupmemorythathasbeen
calibratedandisavailableforuse.(Forproperoperation,atleastonesetup
memorymustbesavedintotheSC-1’snon-volatilememory.)
TheRS232portiswiredasaDCE,andconnectsviaastraightcabletoa
DTE,orviaanullmodem/crossovercabletoanotherDCE(uncommon).
• Pin2istheTRANSMITfordataFROMtheSC-1TOthecontrol
system,andcarriesRS232signalnameRxD
• Pin3istheRECEIVEfordataFROMthecontrolsystemTOthe
SC-1,andcarriesRS232signalnameTxD
• Pin5istheGROUND/COMMONforthepin2andpin3sig-
nals
Theotherpinsarenotconnected,theshellisgroundedatthesamepoint
aspin5.SignalnamesRxDandTxDarenamedfromthepointofviewof
theDTEandthat’swhythenamesappeartobebackwardbutarenotper
thestandard.
OfftheshelfUSB->RS232adaptersplugrightintotheportandworkas
expectedwithoutspecialconguration.
Thecommandsavailabletoyourcontrolsystemprogrammerareasfol-
lows: