Apache Labs ANDROMEDA ANAN-7000DLE MKII - 6.3 Other Modes; 6.3.1 FM Operation; 6.3.2 Digital Modes; 6.4 Advanced Receiver Operation

ANDROMEDAManual Page29of56
6.3 Othermodes
6.3.1 FMOperation
FrequencyModulationis available.WhenFMisselectedastheoperatingmode,Itissuggestedthat
theVFOtunestepshouldbesettotheFMchannelspacinginuseinyourarea.TheModeSettings
formfromtheTXMenuhasseveralsettingsforFMoperationincludingnarrow/widedeviation,
repeateroffsetandCTCSStones.
6.3.2 DigitalModes
DatamodescanbeusedwithANDROMEDA.TheywillrequireanadditionalPCapplication,toactas
theuserinterfaceandmodulator/demodulatorforanaudiostream.Therearemanywell‐known
programsavailable:forexampleDM780(forPSK31,forexample)andWSJT‐X(fortheJT65like
modes).
With
ananaloguetransceiver,datamodesareeasytoconfigure.Simplyconnecttheradio’saudioin
andouttoaPCsoundcardviaatransformerconnection,connecttheradiotothePCserialport,and
thedigitalprogramwillbeabletoaccesstheradiothroughasoundcardand
controlTX/RXbyCAT
commands.
WithTHETIStheprocessissimilar.Thekeydifferenceis:theaudioisalready“in”thePC.Weneedto
connectthetwoprogramsinternallytothePC.Thesolutionissimple–useVirtualcables.Theseare
softwareprogramsthatrunonthesamePC
asTHETIS,andcreateasoftwareinterfaceforaudioand
serial.Bothprograms“see”asoundcardandserialportconnection. TheThetismanualcovershow
toconfigurethesoftwareandsetupfordatamodes.
Rememberthatmostdatamodesarehighdutycycle.Youwillneedtoreduce
thepeakTXpowerto
avoidoverheatingyourPA.
6.4 AdvancedReceiverOperation
6.4.1 DualRXOperation
Theradiohastwofullyindependentreceivers.IfRX2isenabledyoucanlistenonadifferent
frequencyordifferentbandfromRX1atthesametime.RX2iswiredtoaseparateantennainput.
6.4.2 Attenuation
RFattenuatorsareavailableontheRXpathbeforetheA‐Dconverters.Inthepresenceof
exceptionallystrongsignals,attenuatio nmaybeneededtopreventADCoverload.ADCoverloadwill
beindicatedclearlyinthedisplayifithappens.
TheattenuatorsforeachreceivercanbesetusingtheRX
Menu.
6.4.3 FilterHigh/LowCut
Eachreceiverhasfullyvariablereceiverfilterbandwidths.Wheneverthemodeischanged,the
receiverfilterbandwidthissettothatlastusedforthemode.Aseriesof filterbandwidthare
availableandcanbesteppedthroughusingFilter+andFilter‐buttons.
ThefilterLowCutandHighCut
encodersprovideawayto“dial”thefiltersettingsquickly.Ifyouare
listeningtoaweakstationandbegintohearQRM,thesecontrolscanhelpyoutoremovetheQRM.
 IftheQRMisatalowaudiofrequency:usetheLowCutknobtoadjustthefilter
torejectit
 IftheQRMisatahighaudiofrequency:usetheHighCutknobtoadjustthefiltertorejectit
Thefilterbandwidthisshownonthepanadapterdisplayasagreybar.