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<font face="Times New Roman, Times, serif">Wow, greatest thing for HF
APRS yet !<br>
It has all the benefits of PSK.<br>
Signals way down in strength still decode.<br>
I downloaded the program and have it running near Pittsburgh Pa.<br>
I hear KD4MOJ-6 and was able to send a message this morning.<br>
Almost a pipeline from Pittsburgh to Florida this morning !<br>
<br>
I like the idea of using the 2100 hz version in the USA.<br>
Being able to have the receiver set to the same frequency as AX25 APRS,<br>
allowing simultaneous RX AX25 APRS with a TNC and PSK APRS with the
sound card is a major plus.<br>
I think this could take off big time. <br>
Best advance for HF APRS in years.<br>
Perhaps the 2100 hz version should be the standard version ?<br>
I have not tried the different frequency versions yet or what the RX
dial settings should be.<br>
My guess is that it depends on what TNC you have for AX25 APRS, what
the tone freqs are ?<br>
Thanks for the great program.<br>
Your time and effort put into this program will be appreciated by all.<br>
There will be more people on HF APRS because of this program.<br>
Thanks<br>
N3FLR - Frank<br>
<br>
</font><br>
On 2/18/2010 5:20 AM, Chris Moulding wrote:
<blockquote cite="mid:4B7D147F.1020306@crosscountrywireless.net"
type="cite">I've released the latest version of the APRS Messenger v
2.26 program.
<br>
<br>
The biggest change is that APRS over PSK-63 has been added. This has
been tried
<br>
before with an add-on to UI-View but that had problems sending packets
with
<br>
errors to the APRS-IS system. I've added a preamble, start and stop
flags and a
<br>
strong checksum to each packet so that each received packet is checked
as correct
<br>
before being sent to the internet.
<br>
The display will show all packets received even with errors so that
weak signals
<br>
can still be read manually. A frequency hopping routine has been added
to the PSK-63
<br>
receiver to allow rapid signal acquisition over a +/- 50 Hz range. A
Tune option
<br>
allows the operator to send a carrier + 150 Hz in frequency to avoid
<br>
interference to other APRS over PSK-63 users. The program uses the PC
soundcard
<br>
in a similar way to other digimode programs.
<br>
<br>
The program comes in three versions with different PSK-63 audio tone
<br>
frequencies, 700, 1300 and 2100 Hz.
<br>
<br>
The second change is the addition of a receive only Igate. All HF or
VHF packets
<br>
received can be sent to the APRS-IS. If the connection to the APRS
server is
<br>
lost it automatically retries 1 minute later.
<br>
<br>
Future developments will include a GPS option for mobile HF tracking.
<br>
<br>
If you want to try APRS over PSK-63 on HF I'm running an Igate on
10.1497
<br>
MHz. Set your receiver to a dial frequency of 10.1476 MHz USB with the
2.1 kHz
<br>
version. Please note that the dial frequency is the same as used for
existing HF
<br>
300 bd packet APRS so it will work with existing HF APRS set-ups. In
the US
<br>
Lynn KJ4ERJ is also running an APRS over PSK-63 Igate on 10.1476 MHz.
<br>
<br>
The software is freeware and can be downloaded from the following
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>
A Yahoo group for discussion on this and other topics:
<br>
<br>
<a class="moz-txt-link-freetext" href="http://uk.groups.yahoo.com/group/cross_country_wireless">http://uk.groups.yahoo.com/group/cross_country_wireless</a>
<br>
<br>
See you on the waterfall!
<br>
<br>
73,
<br>
<br>
Chris, G4HYG
<br>
<br>
</blockquote>
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