FOREWORD ............................................. iIMPORTANT .............................................. iIN CASE OF EMERGENCY ...................... iiNOTE ........................................................ iiRADIO OPERATOR WARNING ............... iiiTABLE OF CONTENTS ........................... ivPRECAUTION .......................................... vEXPLICIT DEFINITIONS .......................... v1 OPERATING RULES .................. 12 PANEL DESCRIPTION........... 2 – 5 Front panel ..................................... 2 Function display .............................. 4 Microphone...................................... 53 BASIC OPERATION ............ 6 – 10 Channel selection ........................... 6 Receiving and transmitting ............. 8 Call channel programming .............. 9 Channel comments ......................... 9 Optional Voice scrambler operation .. 104 DUALWATCH/TRI-WATCH ......... 11 Description .................................... 11 Operation ...................................... 115 SCAN OPERATION ........... 12 – 13 Scan types .................................... 12 Setting tag channels ..................... 13 Starting a scan .............................. 136 DSC OPERATION .............. 14 – 35 MMSI code programming ............. 14 DSC individual ID ......................... 14 Position and Time programming ... 16 Position/Time indication ................ 17 Distress call .................................. 18 Transmitting DSC calls ................. 21 Receiving DSC calls ..................... 29 Received messages ..................... 32 DSC Set mode .............................. 347 OTHER FUNCTIONS .......... 36–37 Intercom operation ........................ 36 Microphone lock function .............. 378 SET MODE ........................ 38 – 41 Set mode programming ................ 38 Set mode items ............................. 399 CONNECTIONS ANDMAINTENANCE ................. 42 – 47 Supplied accessories .................... 42 Antenna ........................................ 42 Fuse replacement ......................... 42 Cleaning ....................................... 42 Connections .................................. 43 Mounting the transceiver .............. 44 Optional unit installation ............... 46 Dimensions ................................... 4710 TROUBLESHOOTING .............. 4811 CHANNEL LIST ........................ 4912 SPECIFICATIONS ANDOPTIONS ........................... 50 – 51 Specifications ............................... 50 Options ......................................... 5113 HM-127 REMOTE-CONTROLMICROPHONE ................... 52 – 66 Panel description .......................... 52 Function display ............................ 54 Channel selection ......................... 56 Receiving and transmitting ........... 57 Lock functions ............................... 58 Display backlighting ...................... 58 Monitor function ............................ 59 RF attenuator function .................. 59 Call channel programming ............ 59 Optional Voice scrambler operation .. 60 Dualwatch/Tri-watch operation ..... 60 Starting a scan .............................. 61 Setting tag channels ..................... 61 Set mode programming ................ 62 Intercom operation ........................ 63 Channel comments ....................... 63 HM-127 supplied accessories ...... 64 Installation .................................... 65TEMPLATEivTABLE OF CONTENTS 12345678910111213