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G'day gents<div><br></div><div>How much is not cheap, and where does one obtain an SCS DSP tracker?</div><div><br></div><div>David</div><div><br><div><div>On 13 Jan 2010, at 03:34, Mike Zwingl oe3mzc wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"> <div><font face="Arial" size="2">this is really the only choice for short wave!</font></div> <blockquote style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <div style="FONT: 10pt arial">----- Original Message ----- </div> <div style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><b>From:</b> <a title="radio@irock.com.au" href="mailto:radio@irock.com.au">Jack Chomley</a> </div> <div style="FONT: 10pt arial"><b>To:</b> <a title="ozaprs@aprs.net.au" href="mailto:ozaprs@aprs.net.au">Australian APRS Users</a> </div> <div style="FONT: 10pt arial"><b>Sent:</b> Monday, January 11, 2010 8:46 AM</div> <div style="FONT: 10pt arial"><b>Subject:</b> Re: [OZAPRS] 300 baud TNC</div> <div><br></div>Tim,<br><br>One of the great features of the SCS DSP tracker is its ability to decode off frequency signals on HF. The older TNCs cannot do this at all.<br><br>From SCS Manual:<br><br><font face="Arial, Helvetica"><b>The DSPTNC supports the following Packet-Radio operating modes:<br></b></font><font face="Arial, Helvetica">Parameter Mode<br>300 300 Bd AFSK (old HF-Packet-Radio standard)<br>TX center frequency default at 1700 Hz (1600 Hz “Space“, 1800 Hz “Mark“).<br>RX center frequency: 1700 Hz ±400 Hz, automatically tuning<br>R300 200/600 Bd Robust-Packet-Radio (RPR), automatic selection of speed.<br>TX center frequency fix at 1500 Hz<br>RX center frequency: 1500 Hz ±240 Hz, automatically tuning<br>UI-packets (APRS, Unproto) are transmitted with 200 Bd RPR.<br>R600 Like R300, but UI-packets (APRS, Unproto) are transmitted with 600 Bd RPR.<br>1200 1200 Bd AFSK.<br>9600 9600 Bd Direct-FSK (G3RUH).<br>19200 19200 Bd Direct-FSK (G3RUH).<br><br></font><font face="Arial, Helvetica"><b>Highlights of the Modem-Implemtations in the DSPTNC:<br></b></font><font face="Arial, Helvetica">Generally very reliable and “flicker free” DCD achieved with special DCD algorithms on the<br>signal processor.<br></font><font face="Arial, Helvetica" color="#ff0000"><b>New developed multi-detector for 300 Bd AFSK. The signal processor automatically<br>processes a frequency range of ±400 Hz looking for 300 Bd transmissions and receives all<br>detected signals in parallel.</b></font><font face="Arial, Helvetica"> Exact tuning by the user is not necessary any more as a perfect<br>tuning on the receiver side is always achieved automatically. If manual tuning of the RX frequency<br>is desired, the </font><font face="Arial, Helvetica"><b>DCD-LED </b></font><font face="Arial, Helvetica">can be used for that purpose. It lights </font><font face="Arial, Helvetica" color="#00ff00">green </font><font face="Arial, Helvetica">if the actually<br>received packet has a frequency error of less than +-40 Hz, otherwise it </font><font face="Arial, Helvetica" color="#ff0000">lights </font><font face="Arial, Helvetica">red.<br>Special transmit- and receive filters for 1200 Bd AFSK, to avoid adjacent channel interference<br>and degradations by AC hum.<br>Adaptive DC-removal by the signal processor at 9600 und 19200 Bd Direct-FSK.<br><br></font><font face="Arial, Helvetica">Whilst these units are not cheap, they work very well as an HF IGATE unit, due to their off freq decode ability.<br><br></font>73,<br><br>Jack VK4JRC<br><br>At 04:38 PM 1/11/2010, you wrote:<br> <blockquote class="cite" cite="" type="cite">Thanks for the replies guys, I have two things in mind. 1) a crossbanded HF to <br>VHF tracker, I have now got the Codan NGT running with a TT3 and would like to <br>be able to use a portable tracker away from the vehicle, i have a Kenwood HT <br>with a gps and TT3 attached to it that goes great in a backpack. Both the KAM <br>and the SCS dsp seem to be able to do this.<br>2) Be able to use it at home to be able to "see" hf stations, possibly even <br>using it as a temporary/semi permenant 40m gate.<br>The SCS dsp is definately an option as a new unit, possibly better than the <br>Kantronics ? They are both fairly close in pricing. The tracker 2 would <br>definately do just fine for home but can it have 2 radios and baud rates at the <br>same time ? I will look it up ! I have also just stumbled accross a KAM plus on <br>ebay that finished yesterday and went for $ 143 us.<br>Cheers Tim VK2HLT<br><br>Quoting Phillip <<a href="mailto:zl2tze@yahoo.com.au">zl2tze@yahoo.com.au</a>>:<br><br>> Hi Tim,<br>> Do you want this for mobile use or base station ?<br>> <br>> 73 Phillip<br>> ZL2TZE<br>> <br>> _______________________________________________<br>> OZAPRS mailing list<br>> <a href="mailto:OZAPRS@aprs.net.au">OZAPRS@aprs.net.au</a><br>> <a href="http://lists.aprs.net.au/mailman/listinfo/ozaprs" eudora="autourl">http://lists.aprs.net.au/mailman/listinfo/ozaprs</a><br>> <br><br><br><br><br><br>------------------------------------------------------------<br>This email was sent from Netspace Webmail: <a href="http://www.netspace.net.au/" eudora="autourl">http://www.netspace.net.au</a><br><br>_______________________________________________<br>OZAPRS mailing list<br><a href="mailto:OZAPRS@aprs.net.au">OZAPRS@aprs.net.au</a><br><a href="http://lists.aprs.net.au/mailman/listinfo/ozaprs" eudora="autourl">http://lists.aprs.net.au/mailman/listinfo/ozaprs</a></blockquote><br><div> <br class="khtml-block-placeholder"></div><hr><div><br class="khtml-block-placeholder"></div>_______________________________________________<br>OZAPRS mailing list<br><a href="mailto:OZAPRS@aprs.net.au">OZAPRS@aprs.net.au</a><br>http://lists.aprs.net.au/mailman/listinfo/ozaprs<br></blockquote><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">_______________________________________________</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">OZAPRS mailing list</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><a href="mailto:OZAPRS@aprs.net.au">OZAPRS@aprs.net.au</a></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><a href="http://lists.aprs.net.au/mailman/listinfo/ozaprs">http://lists.aprs.net.au/mailman/listinfo/ozaprs</a></div> </blockquote></div><br></div></body></html>