Specifications

Section-3 Operation
October 17, 2013
3‐38
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3.7.5.3 RTACProfilessubwindow
ProfileLinear:ForlinearRTACcorrection,BASICand LONGOFFSETprofilesshouldbetriedfirst.Theruleofthumb
hereisthatmoreisnotnecessarilybetter,sousethefirstprofilethatworkswell.Theequalizerlengthintime
generallyincreasesdownthelist.Linearprofilechoicesare:
• BASICThiscorrectionshouldbeusedformoststandardmaskfilters.
• SHORT
• LONG
• MAX
• BASICOFFSET
• SHORTOFFSET
• LONGOFFSETThiscorrectionshouldbeusedforsharptunedmaskfilters,specialmask
filters,orwhenatwoormoretransmittersofdifferentfrequenciesarebeingcombin ed
intoasingleoutputthrough2ormoresharptunedfilters.
• MAXOFFSET
ProfileN
onlinear:Fornon‐lin earRTACcorrection,thenamedprofilesshouldbetriedbeforethenumberedprofiles.
MosttransmittersshoulduseBASICorBASICMEMORY.However,iftheydonotgivesatisfactoryadjacentchannel
inter‐modulationperformance,ahigherprofilesuchasHIGHorHIGHMEMORYshouldbeused.Nonlinearprofi le
ch
oicesare:
• BASIC
• BASICMEMORY
• PROFILE3
• PROFILE4
• HIGH
• HIGHMEMORY
• PROFILE7
• PROFILE8
• PROFILE9
3.7.6 DUC/RTACSetupScreen5
Figure 3-36 LPU RTAC Screen 5
Upconverterc
orrectionmaybeusedtocorrectanynon‐linearfrequencyresponseinthemodulatorRFupconverter.
Thisoperatessim ilarlytoLinearRTAC.Refertoinstructionsinwindow.