Jetstream_JT-220M_serv维修手册含电器原理图

JT220MSPECIFICATIONSGeneralFrequency RangeRX216-280MHzTX222-225MHzNumber of channels100Operation modeFM 16KOF3E (Wide mode)/8K50F3E(Narrow mode)Channel Stepping5,8.33,10,12.5,15,20,25,30,50KHzAntenna Impedance502Working temperature-10℃~+60℃(-14℉~+140℉)Power Supply13.8VDC±15%(11.7~15.8V0Grounding MethodNegative groundCurrentTransmitter:about 9.0AReceiver:about 600mA(max.)400mA(noise reductions)Frequency Stability±2.5ppmDimensions (Wx Hx D)145×47×190mmWeightApprox.1.2kg /2.6lbRECEIVERCircuitryDouble conversion superheterodyneIntermediate Frequency (1st/2nd)38.85MHz/450kHzSensitivity(12dB SINAD)Wide 0.25uV or less Narrow:0.35uV or lessSelectivity-6dBWide 12kHz or more Narrow:6kHz or more-60dBWide 28kHz or lessNarrow 14kHz or lessSquelch Sensitivity0.1VAudio Output(82,10%distortion)2.0WTRANSMITTERPower OutputHigh50WMid10WLowAbout 5WModulationChangeable impedanceScattering transmit-60dB or less than-60dBMaximum Frequency DeviationWide:±5kHz,Narrow:±2.5kHzImpedance of Microphone2K2