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Section-3 Operation

October 17, 2013

3‐38

WARNING:Disconnectprimarypower priortoservicing. 888‐2693‐004

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

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.

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