<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
<title></title>
</head>
<body bgcolor="#ffffff" text="#000000">
On 2/28/2010 2:46 PM, Chris Moulding wrote:
<blockquote cite="mid:4B8AF251.1090200@crosscountrywireless.net"
type="cite">Following Stephen's explanation I've just uploaded a 1800
Hz version of APRS Messenger v2.33 to the webpage:
<br>
<br>
<a class="moz-txt-link-freetext" href="http://www.crosscountrywireless.net/aprs_messenger.htm">http://www.crosscountrywireless.net/aprs_messenger.htm</a>
<br>
<br>
The other audio tones, 700, 1300 and 2100 Hz are also available.
<br>
<br>
APRS over PSK-63 activity is increasing daily in Europe and the US.
It's a quick and cheap (free) way of getting on HF APRS. The amount of
feedback I'm getting on the program is helping development. It already
has a TCP/IP link to export HF APRS packets to map display on
APRSISCE/32 and RadioMobile, soundcard selection, selectable HF beacon
rates, VHF / HF stations heard listboxes and a lot of improvements over
the initial version. Over the next few weeks I'll add GPS input to
allow mobile HF tracking over PSK-63.
<br>
<br>
7<br>
</blockquote>
<br>
<br>
This is way cool! <br>
<br>
I have just finished experimenting with using the TCP/IP port 8063 to
link to other APRS applications. I can now confirm that the local port
8063 works with UIview, APRSplus and APRSpoint. <br>
<br>
In the old days of the G4IDE PSK31 Server for UIview, one used the PSK
Server's IP connection just as through it was an Internet APRS server.
You simply set up your APRS application's server config to log into
"localhost:portnumber" instead of a "real" . ("localhost" a.k.a.
"127.0.0.1" is a "magic" IP address that always means your own computer
rather than another one on a network.) <br>
<br>
I threw together a test setup consisting of two laptops with their
sound systems cross-connected with 3.5mm patch cords. I am running the
1300 Hz version of the latest APRS Messenger (getting ready to deploy
it in a setup using KAM tones on 10.151.000 LSB) on both machines.
In turn, I set the main APRS TCP/IP server login of UIview, APRSplus
and APRSpoint to "127.0.0.1:8063" and have sent/received messages from
all three. <br>
<br>
However the port 8063 server apparently can only accept one connection
at a time. (The local server in UIview will accept multiple clients at
once.) Solution: I have UIview's main "APRS Server Setup" connected
to APRS Messenger. In turn, UIview's "local server" is re-sharing the
data with both APRSpoint and APRSplus. All three now receive
messages sent from the other laptop at the same time. <br>
<br>
I assume that once APRS Messenger gains the GPS input and capability to
send posits, that this will work to put APRS posits on the map in any
(or all) of these programs. To make the most of the slow PSK
transmission rate, I would strongly suggest that APRS Messenger use the
highly-compressed MIc-E transmission format since it is about ONE-THIRD
the length of a plain-text APRS posit. The downside is that it is not
human-readable, although ALL APRS mapping applications can decode it. <br>
<br>
As I write this message (at about 5:40 PM Pacific Time here in
Pasadena, California), I can actually hear faint PSK carriers
underneath (pitch-wise) the conventional AX25 packet tones on my TS-50
monitoring 30M. This will be a REAL challenge but may well
demonstrate the superioriority of PSK63 over FSK packet, since my local
noise level (from a leaking cable TV trunk line) is absolutely
horrendous -- around S9. <br>
<br>
Gotta go and connect one of the laptops to my off-air monitoring
system........<br>
<br>
<br>
<hr size="2" width="100%"><br>
--<br>
<br>
Stephen H. Smith wa8lmf (at) aol.com <br>
EchoLink Node: WA8LMF or 14400 [Think bottom of the 2M band]<br>
Skype: WA8LMF<br>
Home Page: <a class="moz-txt-link-freetext" href="http://wa8lmf.net">http://wa8lmf.net</a><br>
<br>
NEW! Universal HF/VHF/UHF Antenna Mounting System<br>
<a class="moz-txt-link-freetext" href="http://wa8lmf.net/mobile/UniversalAntMountSystem.htm">http://wa8lmf.net/mobile/UniversalAntMountSystem.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>
Updated "Rev H" APRS <a class="moz-txt-link-freetext" href="http://wa8lmf.net/aprs">http://wa8lmf.net/aprs</a><br>
Symbols Set for UI-View, <br>
UIpoint and APRSplus:<br>
<br>
<br>
</body>
</html>