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<font face="Times New Roman, Times, serif">Chris,<br>
Wow that was fast, thanks for the fix.<br>
Now I think you have all the possible frequency combination's for all
existing hardware or software TNC out there.<br>
<br>
For any new APRS Messenger </font><font
face="Times New Roman, Times, serif">user </font><font
face="Times New Roman, Times, serif">out there, If you only want to do
PSK63 APRS, it don't matter which version you get.<br>
Just have to know the USB or LSB dial frequency to set the radio.<br>
<br>
If you want to do AX25 APRS and PSK63 APRS at the same time same radio,
you need to choose the correct frequency version <br>
for your AX25 TNC for the PSK63 tones to line up between the AX25
packet tones.<br>
<br>
I just saw Stephen's explanation, thanks <br>
All new users will need guidance to get their radios set to the correct
frequency and SSB.<br>
Bad enough keeping all theAX25 people on frequency.<br>
<br>
Thanks Chris, this is the biggest improvement in HF APRS in years.<br>
I think it will take of big time.<br>
N3FLR - Frank<br>
<br>
<br>
<br>
</font><br>
On 2/28/2010 5:46 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>
73,
<br>
<br>
Chris, G4HYG
<br>
<br>
Chris Moulding
<br>
Cross Country Wireless (2009) Ltd
<br>
7 Thirlmere Grove, Bolton, Lancs, BL4 0QB, UK
<br>
Tel/fax: +44(0)1204 410626
<br>
Mobile: +44(0)7752 391908
<br>
Website: <a class="moz-txt-link-freetext" href="http://www.crosscountrywireless.net">http://www.crosscountrywireless.net</a>
<br>
Company number 6780346 registered in England and Wales <br>
<br>
<blockquote type="cite"><br>
5) Operating on *LSB* (rather than *USB*) *INVERTS* the tone
relationship; i.e. the higher the audio tone, the LOWER the resulting
RF frequency.
<br>
<br>
If one places the PSK63 tone 300 Hz below the lower AGWpe packet tone
of 2100, it will be safely within the SSB audio passband. (A new
version of APRS messenger running at 1800 Hz would be required.)
Setting the radio to a suppressed carrier (i.e. "dial") frequency of
10.151.500 MHz LSB will invert the tone relationships and yield the
following:
<br>
<br>
<br>
10.151.500 - 1.800 = 10.149.700 PSK63
<br>
<br>
10.151.500 - 2.100 = 10.149.400 Packet SPACE
<br>
10.151.500 - 2.300 = 10.149.200 Packet MARK
<br>
<br>
</blockquote>
<br>
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<br>
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<br>
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<br>
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<br>
<br>
</blockquote>
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