TECHNICAL MANUAL FOR COMPACT VHF DSC RM2042
TECHNICAL MANUAL FOR COMPACT VHF DSC RM2042
TECHNICAL MANUAL FOR COMPACT VHF DSC RM2042
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
1 INTRODUCTION <strong>RM2042</strong>BLOCK DIAGRAM <strong>RM2042</strong>14.850MHzRECEIVER(MODULE 3)MICROPROCESSOR(MODULE 2)DISPLAY UNIT(MODULE 4)Rxamp.Firstmixer15.3MHzIF-filter &.Limit amp.2’d Mixer AF-detect& osc.RF-level det.AF-filter-6 dB/oct.+5V1’st localosc.141.225 MHzBufferamp.450kHz2’d IFfilterCarrierDetect8.000MHzXTALosc.PROMmemory2EPROMmemoryView angelcontrrolP5LCDDisplaymodule.+10V reg.Power failgen.+10VAF-SwitchControllogic.Displaybacklightcontrol+5V4.9152 MHzXTAL osc.÷rRAMmemoryI/Oports+5V reg.1AF-filter-6dB/oct.CarrierDetectModulationdet. logic.Rx-AFfilter2FSKmodem.Tx-AFfilterS1VOLON/OFF28121Modemcommuc.int.f.uP.unit.CicuitselectdecoderINTERFACE(MODULE 1)2PowerfailureresetAF-ampw.mute.11Printerstrobepulsegen.uPcontrollogic.w.resetProgramabletimers12V/24VWiring circ.+5Vreg.+5VDistressch.inforn.Ext.alarm.2Tx-AFamps.3NMEAdata intf.2KEYBOARD(MODULE 6)21Fuse/rev.voltageprotection1132131<strong>VHF</strong>portconn.switch<strong>VHF</strong>serialcom.1Printf. Intf.&I/O-Ports16+5VC2149/PC intf.2VccKeyboardlight on/off+5VVoltageconverterReal timeclock32.76kHz+-KeyboardmatrixKeyboardbacklight61111 3191792542Power con.P3HandsetJ1<strong>VHF</strong>P2PRINTERJ4C2149/PCJ3NMEAJ227502PAGE 1-9
Change language