问题描述：
英语翻译
DATATRANSMISSION
Toachieveindustrialacceptanceofthec-i-ssupplyconceptaswideaspossible,notonlyenergy
transmissionbutalsodatatransmissionshallbepossiblebyonlyonetwo-wiresupplyline.
PreliminaryinvestigationsofPTBshowedthatthisisalsopossiblewiththec-i-sconcept
(“PowerlineCommunication“).
Asisgenerallyknown,eachperiodicalinterruptionofadirectvoltageeffects-forsysteminherent
reasons-theemissionofhigher-frequencyinterferencelevels.Tomakethissimpleand
uncomplicated,thedatarate,however,shallbechoseninsuchawaythatthehighestfrequency
requiredfordatatransmissionismuchlowerthantherepetitionfrequencyofthec-i-sswitching
mode.Thebasicoscillationanditsharmonicsofthec-i-sswitchingmodecouldbefilteredout
bymeansofasimplelow-passfilter.Thepassbandofthisfiltershouldonlycomprisethe
frequencyrangesrequiredfordatatransmission.Datatransmissionratesupto50kbit/sare
consideredtoberealistic.
Duetothespectraldistributionoftheinterferencepowercausedbythec-i-sswitchingmode
fasterdatatransmissionsrequiringanincreasedbandwidthabovetherepetitionfrequencyofthe
c-i-sswitchingmodecanprobablyonlyberealizedwithconsiderablecircuitryeffort.
Inanycase,however,itispossibletorealizeadatarateofanorderofmagnitudeasusualin
currentlyexistingprocesscontrolsystemsonthebasisoftheFISCOModelaccordingtoIEC
60079-27withthe“simple”methodoffirst-orderlow-passfilteringasdescribedabove.
