[OZAPRS] 300 baud TNC

[vk2hlt at netspace.net.au]

About $ 380 ish US.
I see on the SCS website there are 2 resellers in Aus. Not sure if they are
active or not. SCS seem to be into Yachting comms and do amateur stuff also.
Cheers

Quoting David and Justine Olsen <davejust at bigpond.net.au>:

> G'day gents
> 
> How much is not cheap, and where does one obtain an SCS DSP tracker?
> 
> David
> 
> On 13 Jan 2010, at 03:34, Mike Zwingl oe3mzc wrote:
> 
> > this is really the only choice for short wave!
> > ----- Original Message -----
> > From: Jack Chomley
> > To: Australian APRS Users
> > Sent: Monday, January 11, 2010 8:46 AM
> > Subject: Re: [OZAPRS] 300 baud TNC
> >
> > Tim,
> >
> > 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.
> >
> > From SCS Manual:
> >
> > 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
> > green if the actually
> > received packet has a frequency error of less than +-40 Hz,
> > otherwise it lights red.
> > 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:
> >> 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 <zl2tze at yahoo.com.au>:
> >>
> >> > Hi Tim,
> >> >              Do you want this for mobile use or base station ?
> >> >
> >> > 73 Phillip
> >> > ZL2TZE
> >> >
> >> > _______________________________________________
> >> > OZAPRS mailing list
> >> > OZAPRS at aprs.net.au
> >> > http://lists.aprs.net.au/mailman/listinfo/ozaprs
> >> >
> >>
> >>
> >>
> >>
> >>
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> >>
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> >
> >
> >
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> 
> 





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