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Hmm... I'm sure that not many are going to explore that path!... (but a nice present non the less!)<BR>
<BR>
Oh and can someone donate one for my 40m HF gate! (Joking)<BR>
<BR>
<BR>
On Mon, 2010-01-11 at 17:46 +1000, Jack Chomley wrote:<BR>
<BLOCKQUOTE TYPE=CITE>
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>
<B>The DSPTNC supports the following Packet-Radio operating modes:</B><BR>
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>
<B>Highlights of the Modem-Implemtations in the DSPTNC:</B><BR>
Generally very reliable and “flicker free” DCD achieved with special DCD algorithms on the<BR>
signal processor.<BR>
<B><FONT COLOR="#ff0000">New developed multi-detector for 300 Bd AFSK. The signal processor automatically</FONT></B><BR>
<B><FONT COLOR="#ff0000">processes a frequency range of ±400 Hz looking for 300 Bd transmissions and receives all</FONT></B><BR>
<B><FONT COLOR="#ff0000">detected signals in parallel.</FONT></B>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 <B>DCD-LED</B>can be used for that purpose. It lights <FONT COLOR="#00ff00">green</FONT>if the actually<BR>
received packet has a frequency error of less than +-40 Hz, otherwise it<FONT COLOR="#ff0000">lights</FONT>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>
Whilst these units are not cheap, they work very well as an HF IGATE unit, due to their off freq decode ability.<BR>
<BR>
73,<BR>
<BR>
Jack VK4JRC<BR>
<BR>
At 04:38 PM 1/11/2010, you wrote:<BR>
<BLOCKQUOTE 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 <zl2tze@yahoo.com.au>:<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>
> OZAPRS@aprs.net.au<BR>
> <A HREF="http://lists.aprs.net.au/mailman/listinfo/ozaprs">http://lists.aprs.net.au/mailman/listinfo/ozaprs</A><BR>
> <BR>
<BR>
<BR>
<BR>
<BR>
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