[aprssig] "Smart" vs. "dumb" trackers
Stephen H. Smith
wa8lmf2 at aol.com
Mon Jun 23 11:03:29 EDT 2014
On 6/23/2014 10:03 AM, SARTrack Admin wrote:
> The tinytrak-3 connected to a (cheap) handheld radio will check for an open
> squelch (any noise) before transmitting.
Except that this is not a positive carrier detect; i.e COR. All it does is
sense audio energy coming from the radio's audio-out. It gets fooled by dead
carriers or under-deviated voice signals on the channel into thinking the
channel is clear.
> The TinyTrak-4 has even a full decoding capability.
But you still need (in addition to the handheld and TT4) :
- Some sort of keyboard and display
- A GPS receiver
- Some soft of battery pack to power this stuff
- A tangle of cables to interconnect all this stuff
All in all, a clumsy and messy kluge to replace an all-in-one APRS radio.
Stephen H. Smith wa8lmf (at) aol.com
EchoLink: Node # 14400 [Think bottom of the 2-meter band]
Home Page: http://wa8lmf.net
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