FSR FLEX LT-200 - Switchers; Audio Control; Screen Control; Distance Limitations

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Switchers
Youmayelecttouseaseparateswitchingdeviceforsourceselection.Typicallya
switcherwillhaveserialcontrol.Thissimplifiessetupofyourdisplay.Many
switcherswillswitchbothaudioandvideo.Thisneedstobetakeninto
considerationwhenyouaredesigningtheaudioportionofyoursystem.
Audiocontrol
InasimpleAVsystem,therearemanyoptionsforaudiooutput.Manysystemsuse
theaudiooutputfromthedisplayinconjunctionwithanexternalamplifierand
speakers.Thissimplifiesaudiocontrol.Inthisdesignbesurethedisplayhasthe
abilitytocontrolanyoutputstotheamplifier.
ThereareotherhardwaredevicesinatypicalA/Vsystemwheretheaudiolevels
canbecontrolled.Atypicalexampleofthisisthroughanamplifier,switcheror
mixer.Thedecisiononwhichdevicecontrolstheaudiolevels,isimportanttothe
designofthecontrolsystem.Againbesurethedeviceyouchoosetoadjustaudio
levelshastheappropriatecontrolcapabilities.
ScreenControl
Screenmanufacturershavemanyoptionsavailableforcontrol.Whendesigning
screencontrolintoanAVsystemtherearemanymethodstochoosefrom.Many
manufacturersprovidetheoptionofeitherserial,IR,orcontactclosurecontrolfor
thescreen.Ifyouelecttousecontactclosurecheckthespecificationsfromthe
manufacture.YoumayrequireanexternalserialtorelayconvertersuchastheFSR
Intelli‐toolsITR4Stocontrolyourscreen.Checkthevoltagerequirementsfromthe
screenmanufacture.
DistanceLimitations
Whendesigningasystemitisimportantthatthewiringforcommunicationsdoes
notexceedthepublisheddistancelimitations.ThedistancelimitationsfortheFLEX
hardwarearelistedaboveinthehardwaresectionofthismanual.
IRConsiderations
OneofthechallengeswhenusingIRinAVsystemissyncingthedifferentdevicesto
ensurewhenapowerbuttonispressedthesystemactuallycomeson.Youmaywant
toaddaseparateon/offbuttontoanyIRdevicescreentoensuretheycanbe
poweredtothedesiredstate.
SerialConsiderations
Manufacturer’sserialcommandsetsdiffergreatly.Itisimportanttobesurethatthe
devicedriversarereadilyavailable.Serialcommandsalsovarygreatlyin
complexity.Herearetwoexamplesofthe“PowerOn”command”
PowerOnC00
PowerOn02H00H00H00H00H02H
Acomplexserialcommandsetincreasesthepotentialforcommunicationissues.