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[aprssig] APRS Messenger now has APRS over PSK-63

Frank or Barbara Rossi n3flr at bellatlantic.net
Mon Mar 1 06:25:32 UTC 2010


Chris,
       Wow that was fast, thanks for the fix.
Now I think you have all the possible frequency combination's for all 
existing hardware or software TNC out there.

For any new APRS Messenger user out there, If you only want to do PSK63 
APRS, it don't matter which version you get.
Just have to know the USB or LSB dial frequency to set the radio.

If you want to do AX25 APRS and PSK63 APRS at the same time same radio, 
you need to choose the correct frequency version
for your AX25 TNC for the PSK63 tones to line up between the AX25 packet 
tones.

I just saw Stephen's explanation, thanks
All new users will need guidance to get their radios set to the correct 
frequency and SSB.
Bad enough keeping all theAX25 people on frequency.

Thanks Chris, this is the biggest improvement in HF APRS in years.
I think it will take of big time.
N3FLR - Frank




On 2/28/2010 5:46 PM, Chris Moulding wrote:
> Following Stephen's explanation I've just uploaded a 1800 Hz version 
> of APRS Messenger v2.33 to the webpage:
>
> http://www.crosscountrywireless.net/aprs_messenger.htm
>
> The other audio tones, 700, 1300 and 2100 Hz are also available.
>
> 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.
>
> 73,
>
> Chris, G4HYG
>
> Chris Moulding
> Cross Country Wireless (2009) Ltd
> 7 Thirlmere Grove, Bolton, Lancs, BL4 0QB, UK
> Tel/fax: +44(0)1204 410626
> Mobile:  +44(0)7752 391908
> Website: http://www.crosscountrywireless.net
> Company number 6780346 registered in England and Wales
>
>>
>> 5)     Operating on *LSB* (rather than *USB*)  *INVERTS* the tone 
>> relationship; i.e. the higher the audio tone, the LOWER the resulting 
>> RF frequency.
>>
>> 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:
>>
>>
>>      10.151.500 - 1.800 = 10.149.700   PSK63
>>
>>      10.151.500 - 2.100 = 10.149.400   Packet SPACE
>>      10.151.500 - 2.300 = 10.149.200   Packet MARK
>>
>
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