Features: Thisisa0~55MHzDDSSignalGenerator.ItisbasedonAD9850chipandisveryeasytooperate. Supports0~55MHzcontinualadjustat1Hzstep. Input12V(Seller'sNote:Wearealsoprovidingasimplifiedversion,withinput8~9V) Withdirectdigitalinputfrequency Withaudiovolumepotentiometer Withamp.gainpotentiometer WithAGCpotentiometer S-LEDdisplay StandingWave-LEDdisplay Keys&Connectioninterfaces: ENC:Encoderswitch MEM:Switchformemorymode VFO:TransferfromVFOAtoVFOB,orfromVFOBtoVFOA. SSB:Workingmodechange:circulatefromUSB,LSB,AM,CW,andonandon... RIT:Finetuningtoreceivingfrequency CAL:Setfunctions KB-1andKB-2havecommonsharedpin,butisnotGND. Howtooperate: PressCAL,poweron,thenweentersettingscreen.Letgo/releaseCAL. A:ENABLE6XREFCLE:settingchipclockmode,adjustfrequencyencodingsetting.AD9851setto6-multiplyfrequency,AD9850setto1multiplyfrequency.PressCALthenquicklyreleasetoenternextstepB. B:DDS-SYSTEM-CLK:Chipworkingfrequencysetting.Useencoderswitchtoadjustvalue.OperateinaccordancewithSTEPkey.AD9851setatoscillator6-multiplychannel,AD9850setatactualoutputofoscillator.PressCALthenquicklyreleasetoenterstepC. C:MIN_RX_DDS_FREQ:Settingminimumworkingfrequency.UseencoderswitchtoadjustvalueandinaccordancewithSTEPkey.PressCALthenquicklyreleasetoenterstepD. D:MAX_RX_DDS_FREQ:Settingmaximumworkingfrequency.UseencoderswitchtoadjustvalueandinaccordancewithSTEPkey.(Smallerthan60MHzwouldbeOK).PressCALthenquicklyreleasetoenterstepE. E:SSB_OFFSET:FinetuningforSSBworkingmode.UseencoderswitchtoadjustvalueandinaccordancewithSTEPkey.PressCALthenquicklyreleasetoenterstepF. F:CW_OFFSET:FinetuningforCWworkingmode.UseencoderswitchtoadjustvalueandinaccordancewithSTEPkey.PressCALthenquicklyreleasetoenterstepG. G:OFFSET_FREQ:SettingofoffsetFrequency.
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