E pronto o continente Africano já tem D-STAR.<br>Para quem defendia que o D-STAR era dos Países "ricos" enganou-se.<br><br>73<br><br><div class="gmail_quote">2011/1/24 João Gonçalves Costa <span dir="ltr"><<a href="mailto:joao.a.costa@ctt.pt">joao.a.costa@ctt.pt</a>></span><br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">The first digital repeater in Johannesburg is active on the air.<br>
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The repeater is on loan from Multisource for demonstration purposes and is offering amateurs an opportunity to experiment with D-Star. The system was installed and demonstrated during the SA-AMSAT event last Saturday at the NARC. Thanks to Ronald, ZS6RVC, Riaan, ZS4PR and Frik, ZS6FZ.<br>
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D-STAR, the acronym for Digital Smart Technologies for Amateur Radio, is a digital voice and data protocol specification developed by the Japan Amateur Radio League. While there are other digital on-air technologies being used by amateurs, D-Star is one of the first on-air and packet-based standards.<br>
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D-STAR offer clearer signals and uses less bandwidth than its non-digital counterparts. As long as the signal strength is above a minimum threshold, and no multi-path is occurring, the quality of the data received is better than an analogue signal at the same strength.<br>
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D-Star compatible radios are available on VHF, UHF, and microwave amateur bands. In addition to the over-the-air protocol, D-Star also provides specifications for network connectivity, enabling D-Star radios to be connected to the Internet or other networks, with provisions for routing data streams of voice or packet data.<br>
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To operate the D-Star repeater switch any D-Star enabled digital radio to DV mode. Tune to 145.6875 MHz with the usual -600kHz offset to talk via the repeater. In the radio menu ensure that R1 and/or R2 are set to ZS6TJ. The UR can be set to CQCQCQ, and MYCALL should be your own callsign.<br>
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The SARL is looking for coverage, signal reports and comments.<br>
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Send your comments to <a href="mailto:armi@sarl.org.za">armi@sarl.org.za</a>.<br>
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Fonte:The South African Radio League<br>
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<br></blockquote></div><br><br clear="all"><br>-- <br>Pedro Almeida<br> CT5JZX <br> IN51OJ<br><a href="http://www.ct5jzx.nra.pt" target="_blank">www.ct5jzx.nra.pt</a><br><br>