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Fri Nov 13 00:14:42 EST 2009


*The DSPTNC supports the following Packet-Radio operating modes:*
Parameter Mode
300 300 Bd AFSK (old HF-Packet-Radio standard)
TX center frequency default at 1700 Hz (1600 Hz “Space“, 1800 Hz “Mark“).
RX center frequency: 1700 Hz ±400 Hz, automatically tuning
R300 200/600 Bd Robust-Packet-Radio (RPR), automatic selection of speed.
TX center frequency fix at 1500 Hz
RX center frequency: 1500 Hz ±240 Hz, automatically tuning
UI-packets (APRS, Unproto) are transmitted with 200 Bd RPR.
R600 Like R300, but UI-packets (APRS, Unproto) are transmitted with 
600 Bd RPR.
1200 1200 Bd AFSK.
9600 9600 Bd Direct-FSK (G3RUH).
19200 19200 Bd Direct-FSK (G3RUH).

*Highlights of the Modem-Implemtations in the DSPTNC:*
Generally very reliable and “flicker free” DCD achieved with special 
DCD algorithms on the
signal processor.
*New developed multi-detector for 300 Bd AFSK. The signal processor 
automatically*
*processes a frequency range of ±400 Hz looking for 300 Bd 
transmissions and receives all*
*detected signals in parallel.*Exact tuning by the user is not 
necessary any more as a perfect
tuning on the receiver side is always achieved automatically. If 
manual tuning of the RX frequency
is desired, the *DCD-LED*can be used for that purpose. It lights 
greenif the actually
received packet has a frequency error of less than +-40 Hz, otherwise 
itlightsred.
Special transmit- and receive filters for 1200 Bd AFSK, to avoid 
adjacent channel interference
and degradations by AC hum.
Adaptive DC-removal by the signal processor at 9600 und 19200 Bd 
Direct-FSK.

Whilst these units are not cheap, they work very well as an HF IGATE 
unit, due to their off freq decode ability.

73,

Jack VK4JRC

At 04:38 PM 1/11/2010, you wrote:
      </pre>
      <blockquote type="cite">
        <pre wrap="">Thanks for the replies guys, I have two things in mind. 1) a 
crossbanded HF to
VHF tracker, I have now got the Codan NGT running with a TT3 and 
would like to
be able to use a portable tracker away from the vehicle, i have a 
Kenwood HT
with a gps and TT3 attached to it that goes great in a backpack. 
Both the KAM
and the SCS dsp seem to be able to do this.
2) Be able to use it at home to be able to "see" hf stations, 
possibly even
using it as a temporary/semi permenant 40m gate.
The SCS dsp is definately an option as a new unit, possibly better 
than the
Kantronics ? They are both fairly close in pricing. The tracker 2 would
definately do just fine for home but can it have 2 radios and baud 
rates at the
same time ? I will look it up ! I have also just stumbled accross a 
KAM plus on
ebay that finished yesterday and went for $ 143 us.
Cheers Tim VK2HLT

Quoting Phillip <a class="moz-txt-link-rfc2396E" href="mailto:zl2tze at yahoo.com.au">&lt;zl2tze at yahoo.com.au&gt;</a>:

        </pre>
        <blockquote type="cite">
          <pre wrap="">Hi Tim,
Do you want this for mobile use or base station ?

73 Phillip
ZL2TZE

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