|From Arte Booten 2/12/2011 11:46am:
There are a few things you should do first. Using HyperTerminal (or a
terminal program of your choice, connect the radio to your computer, turn on
the radio, cycle the TNC until it's in PKT mode - even if its already there -
and type DISPLAY ,then press ENTER. This will show you the status of all the
parameters that have been set within the TNC.
Many packet clients, including some APRS clients, set some of these, and
you may not be aware that they did! Pay particular attention to BEACON (set
to B E 0 [that's a zero]), BTEXT (reset to blank with BT %) HID (causes QRM &
should be off - HID %) and UNPROTO (set to blank U %).
Now, start configuring your new radio port with CONFIGURE > PORTS > NEW
PORT. In the New RFPort window, leave KISS alone and name that port what you
want. I use D700, but you might want to call it something else.
You're now asked if you want to configure it as a TCPIP port. Click No.
This opens the Port Configuration window. You *MUST* set the Quiet Time to
something other than zero, or the TNC will soon exit KISS mode. I use 300
sec. (5 minutes) in a moderately busy RF APRS environment, but you might get
by with a shorter interval in a busy network, or a long one in an RF desert.
RF baud is 1200 for normal APRS ops on 144.390 (in North America, or in
most parts of the EU 144.800). If you want to port RF data onto the IS feed
or the opposite, check those boxes. Check Enabled and Xmit Enable boxes.
Next, press the Genius button to set parameters for Smart Beaconing, so
your position will be transmitted at the right interval if you turn or have
moved more than a given distance. The Min Time and Max Time depend on how
active your local RF APRS network is, and how fast you'll be moving. Don't
set the Min Time too low (beaconing every minute in a busy area causes QRM,
and is annoying!), but if you're on the highway, and use APRS ALERT (setting
PL squelch to 100 to hear if other APRS'ers are in simplex range, so you can
scare up a voice QSO) remember that, at 65 MPH, you'll be out of range in 5
minutes. Similarly, when mobile, traveling in a straight line, a 5 minute
Max Time would be appropriate, but not fixed stations, where an hour can go
by between beacons.
Time Only and Start/Stop depend on whether you're fixed or mobile. A
Fixed station doesn't start and stop in traffic - at least, I hope not - so
Time Only would be appropriate. Mobils can check Start/Stop, and set their
Smart Beaconing parameters of Heading Change (15 degrees ought to get rid of
a mere lane change), and Max Distance of 5 miles gives a pretty good idea of
where you are.
Now click Accept, taking you back to Port Configuration, and click on
Device, where you'll set your Com Port settings. Select the COM port which
your radio is connected to, the baud rate used between them (usually 9600),
and the normal 8-N-1 parity settings. Click OK and Accept. And that's it.
You may have to click ENABLES > RF PORTS > (Your Port) to get it going, but
it ought to be "close enuf fer gu'mint work"!
One thing I've noticed is that the TNC seems to back out of KISS every
so often so (reminds my of my YL), once in awhile, you can disable the port,
turn the D700 off and back on, cycle the TNC through OFF, APRS (wait for it
to initialize) and back to PKT (again, waiting for it to initialize), then
re-enable the port.
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| Mr. Arthur "Arte" Booten Tampa, FL <n2zrc!rEm0vEn0sP@Memail@example.com> |
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