Icom IC-E91 Instruction Manual

Also see for IC-E91: Instruction manual Service manual

Contents

407 DV MODE OPERATION (Optional UT-121 is required) About D-STAR systemIn the D-STAR system, repeater linking via a 10 GHz bandbackbone and internet network (gateway connection) capa-bilities are available. This system provides you to with muchwider coverage range during digital voice mode operation.• D-STAR system outlineFor current repeater operation, stations that are communicat-ing must both be in the same repeater’s operating area.However, in the D-STAR system as in the illustration at left,the repeaters can be linked via the system repeaters (with a10 GHz signal). Thus stations A and B can communicate eventhough they are in different repeater operating areas.Also, the D-STAR system repeaters are connectable throughthe internet— gateway connection capability.For example, when station B uses the gateway connectionstation B can communicate with the station C!By using the gateway connection, long distance communica-tion like DX operation may be possible with 144 or 430 MHzdigital voice!In the D-STAR system, an independent repeater’s operatingarea is called an Area and a group that of linked repeaters viaa 10 GHz backbone is called a Zone.NOTE: The digital repeater for IC-E91 (144 MHz or430 MHz of amateur radio band operation) is not availablein European countries at present of May 2006.StationAStation C Station DRepeater ARepeater D144/430 MHz144/430 MHzRepeater C10 GHzStationBRepeater B10 GHz144/430 MHz144/430 MHzInternetnetworkInternetnetworkAbout time-out timer functionThe IC-E91 has a time-out timer function for digital re-peater operation. The timer limits a continuous transmis-sion for approx. 10 min. Warning beeps will sound before30 sec. (approx.) and just before the timer functioning.