Mini-Kits_EME66B_user操作说明书手册

Mini-K itsTRANSVERTER SEQUENCER KITEME66BSpecifications:I/F TX Input28MHz-144MHz Up to 3Watts Maximum InputTX/RX Delay200mS 10uF Capacitor /10kohm ResistorSwitched Inputs (PTT)+12v to TX FT290R)Ov to TX IC202RF Sensed RX/TX SwitchingSwitched OutputsDelayl,RX +12v,TXOv RX Power supplyDelay2,RX Ov,TX +1228v(Coaxial Antenna RelayDelay3,RX Ov,TX +12 to 28v Power supply to TX Power AmplifierDelay4,RX Ov,TX +12v (TX Stages Power supplyPower supplyVoltage required +12v (J5Current,RX mode 40mA,TX mode 70mA Includes RelayDESCRIPTION:The complete Sequencer is buil ona single 55xmm size PC boardshould take around 4 hourstoconstruct.This Sequencer has been designed to fully control a Transverter various other components like,antenna relays,power amplifiers preamplifiers etc.High powered stations with GasFET preamplifiers generally require proper sequencingof the RX to TX,&TX to RX switching so that preamplifiers relay contacts are not damaged.The general sequence usedto switch from RX to TX is.....1.Tum off the RX stages but leave the local oscillator running Delay1.2.Energize the antenna coaxial relay (Delay2.)3.Apply power to the TX Power Amplifier Enable Delay3.4.Apply power to the TX Exciter/Driver stages(Delay4.The sequence from TX to RX is the complete opposite.The Sequencers PTT interface accepts either a voltage from the an-tema connector of a modified FT290R/IC202,or when a DC control voltage is not used,a RF sensing circuit detects whenRF is applied to the J1 input from a 10,6,or 2meter Radio.Alternatively either Ov or 12v TX can be directly applied to con-nector of the PTTcircuitry for switching.A 12volt relay isused to switch the J1 Transceiver connction through tothe RX J3 TX J4 Transverter I/F connections.In RX mode the relay is turned off allowing RX I/F signals from the Trans-verters RX I/F output to pass from J3 via the Relay to the radio on J1.InTX mode,the Relay is tumed on by applying+12volts to J2,RF from the Radio up to 3Watts into J1 passes via the Relay to the TX output J4 to be routed to the TX I/Finput on the Transverter board.The two back to back IN4148 Diodes in the RX I/F protect the Transverter RX I/F stagesfrom RF when the Transceiver initially goes to TX mode.Resistor attenuators are used in the RX and TX I/F paths to allowadjustment of the TX drive to the Transverter,up to 3Watts in TX mode,and RX gain in receive mode depending on thegain used in the Transverters receiver ie.extra GasFET RF Preamps )and the sensitivity of the Radio that is being used.The Coaxial Relay PA enable switching transistors,Delay 2 3,to allow the use of voltages other than +12volts forswitching.Most commonly available SMA microwave relays are often 28volts so a 28volt switching power supply can eas-ily be connected to the sequencer PC boards J9 or J10 connections.CONNECTIONS:J1I/F connection to the Radio Transce iver (28-144MHz Max RF input 3WattsJ2Connected to the onboard Relay,(+12v TX on J2 switches the Relay on )Normally connect J2 to J8J3RX I/F