<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=ISO-8859-1">
</head>
<body link="#0000EE" text="#000000" vlink="#551A8B" alink="#EE0000"
bgcolor="#ffff00">
<font face="Arial">Once again, N0QBH will be testing his prototype
PSK63-based APRS tracker on 30 meters HF this Saturday (16 March
2013) under the callsign N0QBH-63 . <br>
<br>
He intends to start beaconing around 7:00 AM Central Daylight
(1200 UTC) from his QTH in western Minnesota. Again, this is a
simulated mobile using a GPS emulator to feed the tracker attached
to his fixed station FT-857, instead of an actual GPS in a mobile.
Anyone can try to copy these tests off-the-air with the freeware
soundcard program "APRS Messenger". <br>
<br>
As before, the actual RF center frequency is the standard one for
APRS-over-PSK63 on 30 meters:<br>
<br>
<b> 10.149.700 MHz </b> <br>
<br>
You must be set to this frequency to within about +/- 10 Hz to
successfully receive anything - the PSK receive bandwidth is
incredibly narrow. The indicated ("dial") frequency you
use on an HF/SSB transceiver will depend on the AUDIO tone
frequency you select in APRS Messenger. The suggested settings
are to put the transceiver on <u>10.147.600 MHz USB</u> and set
the audio tone frequency in APRS Messenger to <u>2100 Hz</u>. <br>
<br>
Full details on APRS-over-PSK63 on 30 meters, including download
& setup info for the APRS Messenger program are here on my
website:<br>
<br>
<a class="moz-txt-link-rfc2396E" href="http://wa8lmf.net/APRS_PSK63"><http://wa8lmf.net/APRS_PSK63></a><br>
<br>
You can either try to copy the test signals directly off RF, or
use the usual APRS tracking sites to follow N0QBH's test progress.
My UI-Webserver, along with several others, will be igating the
test to the APRS Internet System. You can view my live map of
off-the-air 30 meters APRS activity </font><font face="Arial"><font
face="Arial">across North America</font> (i.e. the band as heard
at my QTH in central Michigan) at:<br>
<br>
<a class="moz-txt-link-rfc2396E" href="http://wa8lmf.net/map"><http://wa8lmf.net/map></a><br>
<br>
An enlarged view of the upper Mid-West that will automatically
track N0QBH-63, and that draws a track line, will be also be
online at:<br>
<br>
<a class="moz-txt-link-rfc2396E" href="http://wa8lmf.dyndns.org:14437"><http://wa8lmf.dyndns.org:14437></a> (This
UI-Webserver setup, separate from the main HF/VHF one, is normally
used for tracking APRS balloon flights.)<br>
<br>
N0QBH's original announcement on the Cross Country Wireless Yahoo!
group <a class="moz-txt-link-rfc2396E" href="mailto:cross_country_wireless@yahoogroups.co.uk"><cross_country_wireless@yahoogroups.co.uk></a> is
re-quoted below.<br>
<br>
==================PASTE=====================<br>
</font><br>
I've got the new code ready to test and have added a second switch
to the cookie tin cover allowing me to switch modes between mic-e
and conventional lat long on the fly. <br>
The program has also been modified to intercept compressed reports
with a tilde in them, convert the report to conventional and then
send it along. This should prevent gaps in coverage due to longitude
numbers being misinterpreted.<br>
<br>
The fake route will take us across the 98th meridian a couple times
to test the new code and I'll try find and interesting path to
travel :)<br>
Once the meridian test is over, I'll manually switch modes along the
way to demonstrate the two modes.<br>
Start time is about 1300z (7 AM local CDT)<br>
I'll be running about 35 watts.<br>
<br>
73<br>
Mike N0QBH<br>
<hr size="2" width="100%"><br>
Stephen H. Smith wa8lmf (at) aol.com <br>
Skype: WA8LMF<br>
Home Page: <a class="moz-txt-link-freetext" href="http://wa8lmf.net">http://wa8lmf.net</a><br>
<br>
<br>
Long-Range APRS on 30 Meters HF <br>
<a class="moz-txt-link-freetext" href="http://wa8lmf.net/aprs/HF_APRS_Notes.htm">http://wa8lmf.net/aprs/HF_APRS_Notes.htm</a><br>
<br>
High Performance Sound Systems for Soundcard Apps<br>
<a class="moz-txt-link-freetext" href="http://wa8lmf.net/ham/imic.htm">http://wa8lmf.net/ham/imic.htm</a><br>
<a class="moz-txt-link-freetext" href="http://wa8lmf.net/ham/uca202.htm">http://wa8lmf.net/ham/uca202.htm</a><br>
<br>
"APRS 101" Explanation of APRS Path Selection & Digipeating <br>
<a class="moz-txt-link-freetext" href="http://wa8lmf.net/DigiPaths">http://wa8lmf.net/DigiPaths</a> <br>
<br>
<br>
<br>
</body>
</html>