[aprssig] GeoSat 4 Price published
Stephen H. Smith
wa8lmf2 at aol.com
Thu Oct 27 15:34:00 CDT 2005
bruninga at usna.edu wrote:
>Wow, another neat GPS map for the dashboard.
>Can you tell us what these features mean?
>"TMC ready (optional interface required) no additional info"
>"APRS ready with ITT (intercept to Target)"
>"Easy serial interfacing to Kenwood D700 & D7..."
>What is TMC and what is ITT? thanks.
It smells of clueless marketers without any real understanding of APRS.
"TMC" is a typo for "TNC"
The previous version of this device apparently used a hard disk with a
map of all of the U.S. and Canada loaded on it. This one uses a
flashdrive that requires that regional maps be downloaded from a DVD.
Basically it's a mapping GPS that allows you to extract data from it's
internal GPS receiver and feed it into a D700's or D7's GPS port. It
also apparently accepts and plots the waypoint output of the Kenwoods'
GPS port. I doubt that it produces real APRS symbols at all -- just
generic waypoints tagged with callsigns.
The "Kenwood Hookup" diagram, for the previous version of this device,
shown on the website at http://www.geosat.us , is even more
simplistic. It uses a 2.5MM stereo mini-jack "Y" connector (of the type
used to plug two sets of head phones into a Walkman or iPod) to
parallel the D700 GPS input-only across the unit's (external) GPS
receiver. I.E the hookup shares the GPS data with two devices with
no communications between the map and the Kenwood at all.
The website doesn't make clear that this diagram is irrelevent to the
current model with the GPS built-in. Thus my comment about clueless
Stephen H. Smith wa8lmf (at) aol.com
EchoLink Node: 14400 [Think bottom of the 2M band]
Home Page: http://wa8lmf.com
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