Sharp_CB-2460_Service_Manual维修手册含电器原理图

SHARPSERVICE MANUALOUTSTANDING RECEPTION THE WORLD OVER40 ChannelC.B.TransceiverMODELCB-2460有A传NMG行It is unlewful for the user to make amy replaSPECIFICATIONSTransmitter sectionCircuit type..Dual conversion superheterodyne:RF power output..........4W (maximum)P.L.L.circuit frequency synthesizerFrequency range.............2.7MHz Citizens Bandprovides 40Channels..................40 chs.P.L.L.(Phase Locked Loop)transmit and receive channels.circuit SynthesizerDelta tuning of +1.0kHz on eachType of crystal…HC-18Uchannels plus ceramic filter.ToleranceAuxiliary circuits,…Automatic noise limiter (ANL),10.240MHz....±0.004%Variable squelch0thes...±0.003%Public Address System (P.A.)Transmitter modulation...100%(maximum)GeneralModulation limiter..........Yields high average modulation ataverage voice levelsPower source...................DC 12.0V NominalAntenna matching...........Nominal 50 ohmsnegative or positive groundCarrier deviation.........Not greater than 800HzAntenna........50 ohm external antenna for car or basenominal on (exceeds F.C.C.,operationD.O.C.,ete.requirements)Speaker............3-1/8"Harmonic suppression......Exceeds 60dBP.D.S.8-ohm Imp.MicrophonePress-to-talk dynamic microphoneReceiver section(500ohm)Audio power output......3.5 Watts maximum power outputAccessories.Microphone hangerSensitivity..................0.quV/m for 10dB S N/N ratioMobile mounting bracketat 30%at 1000Hz modulationMounting screwsChannels.40 chs.P.L.L.(Phase Locked Loop)Microphone with plug and cord.circuit SynthesizerPower supply cord with fuse holder andType of crystal......HC-18Usocket.11.730MHz.........±0.003%Spare fuse (2.3A)Selectivity ....................6dB down at #3kHz;Dimensions.........2-1/4"(HD×5-3/4(W)×7-7/8"(D)50 dB down at±10kHz.Weight4 Ibs.with microphoneIntermediate frequency....Ist-IF:11.275MHz,Cabinet...Metal body with plastic front2nd-IF:455kHzSHARP IELECTRONICS CORPORATIONExecutive Office:10 Keystone Place,Paramus.New Jersey07652(201)265-5600Regional Offices Distribution Centers:10 Keystone Place,Paramus,New Jersey07652(201)265-560021580 Wilmington Ave.Long Beach,Calif.90810(213)830-4470U.S.Subsidiary of SHARP Corporation,Osaka,Japan