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

Chris Moulding chrism at crosscountrywireless.net
Sun Feb 28 12:47:45 CST 2010


The 2100 Hz tone frequency was designed to work in conjunction with KAM 
tones of 1600 and 1800 Hz. To be compatible with PK-232 and AGWPE tones 
the PSK audio would have to be 2600 Hz.

I can compile a version with a 2600 Hz PSK output if your transceiver 
SSB filter can pass that audio frequency.

Let me know if will and I'll add that tone frequency to the available 


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  

Frank or Barbara Rossi wrote:
> Trying to get APRS Messenger and UI-View using the AGW Packet engine 
> APRS dial frequencies to line up.
> Currently using the 2100 Hz version of APRS Messenger with the dial 
> set at 10.1476 on USB.
> Several stations and I have exchanged messages, works great.
> I figure if I could get the dial frequencies to line up, I could 
> I-Gate AX25 APRS and PSK-63 APRS at the same time,
> same radio and same computer.
> The AGW Packet engine will only decode tones 2100/2300.
> With dial set at 10.1476 on USB AX25 tones are to low to decode 
> without changing dial frequency, and then PSK-63 APRS is off frequency.
> Should I be using a different version of APRS Messenger to get the 
> tones to line up ?
> Also What would the dial frequency and USB/LSB be ?
> What would the dial frequencies be for the different versions of APRS 
> Messenger ?
> I figure all versions are compatible with each other with different 
> dial settings ?
> Thanks
> N3FLR - Frank
> On 2/18/2010 5:20 AM, Chris Moulding wrote:
>> I've released the latest version of the APRS Messenger v 2.26 program.
>> The biggest change is that APRS over PSK-63 has been added. This has 
>> been tried
>> before with an add-on to UI-View but that had problems sending 
>> packets with
>> errors to the APRS-IS system. I've added a preamble, start and stop 
>> flags and a
>> strong checksum to each packet so that each received packet is 
>> checked as correct
>> before being sent to the internet.
>> The display will show all packets received even with errors so that 
>> weak signals
>> can still be read manually. A frequency hopping routine has been 
>> added to the PSK-63
>> receiver to allow rapid signal acquisition over a +/- 50 Hz range. A 
>> Tune option
>> allows the operator to send a carrier + 150 Hz in frequency to avoid
>> interference to other APRS over PSK-63 users. The program uses the PC 
>> soundcard
>> in a similar way to other digimode programs.
>> The program comes in three versions with different PSK-63 audio tone
>> frequencies, 700, 1300 and 2100 Hz.
>> The second change is the addition of a receive only Igate. All HF or 
>> VHF packets
>> received can be sent to the APRS-IS. If the connection to the APRS 
>> server is
>> lost it automatically retries 1 minute later.
>> Future developments will include a GPS option for mobile HF tracking.
>> If you want to try APRS over PSK-63 on HF I'm running an Igate on 
>> 10.1497
>> MHz. Set your receiver to a dial frequency of 10.1476 MHz USB with 
>> the 2.1 kHz
>> version. Please note that the dial frequency is the same as used for 
>> existing HF
>> 300 bd packet APRS so it will work with existing HF APRS set-ups. In 
>> the US
>> Lynn KJ4ERJ is also running an APRS over PSK-63 Igate on 10.1476 MHz.
>> The software is freeware and can be downloaded from the following 
>> webpage:
>> http://www.crosscountrywireless.net/aprs_messenger.htm
>> A Yahoo group for discussion on this and other topics:
>> http://uk.groups.yahoo.com/group/cross_country_wireless
>> See you on the waterfall!
>> 73,
>> Chris, G4HYG
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