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APRS packet every 30 seconds.

 

Someone it seems must¡¯ve put together some ¡°X-Digi¡± device that is sending out a junk packet ever 30 seconds. The ¡°sender¡± is ¡°CDM AL¡±, whatever that means, and of course DireWolf hates it because there is whitespace in the fourth position. The packet also says it¡¯s an ¡°X-Digi Test¡±. (Whatever an X-Digi is.)

This has been going on now non-stop over a month.

You¡¯d think someone would notice their radio is TX¡¯ing ever 30 seconds.

What¡¯s the best way to tactfully approach this? I suppose ¡°Fox hunting¡± is possible (would have to decode the signal while searching as there is a lot of traffic on APRS), but even if did find the sender what¡¯s the best approach to be tactful about it (some people can be weird if they think you are ¡°calling them out¡±).


Sent from my iPhone 13 Pro Max
 

I can help with part of this.
X-Digi is by John Hanson of TNC-X. The X-Digi was an addon board that allowed the TNC to be a stand alone DIGI.
MFJ now sells the MFJ1270 and the x-digi addon board from his design.

What is the best way to find the radio?
Good question.?
I do not think the TNC-X has a TO designation (as it is just hardware), nor do any of the 2 addon boards (as far as I know).
If you are lucky, and have some way of looking at station list (MHEARD) with comments, you can look for MFJ1270 or TNC-X in the comment.

What is the location (area) with the issue?? Maybe a look through nearby stations would give a clue.
Of course Direction Finding is always an option, but kind of tough on a busy frequency.

Robert Giuliano
KB8RCO



On Saturday, March 18, 2023 at 01:12:17 PM EDT, J K via groups.io <kuhnje@...> wrote:


Someone it seems must¡¯ve put together some ¡°X-Digi¡± device that is sending out a junk packet ever 30 seconds.? The ¡°sender¡± is ¡°CDM AL¡±, whatever that means, and of course DireWolf hates it because there is whitespace in the fourth position. The packet also says it¡¯s an ¡°X-Digi Test¡±.? (Whatever an X-Digi is.)

This has been going on now non-stop over a month.

You¡¯d think someone would notice their radio is TX¡¯ing ever 30 seconds.

What¡¯s the best way to tactfully approach this?? I suppose ¡°Fox hunting¡± is possible (would have to decode the signal while searching as there is a lot of traffic on APRS), but even if did find the sender what¡¯s the best approach to be tactful about it (some people can be weird if they think you are ¡°calling them out¡±).


13 Pro Max
 

On Sat, Mar 18, 2023 at 01:12 PM, J K wrote:
even if did find the sender what¡¯s the best approach to be tactful about it (some people can be weird if they think you are ¡°calling them out¡±).
Forgot to comment on the final part:
The starting point would be to point out the issue with the space in the "sender" section.
Then as making suggestions, bring up the rapid rate.
?
-------
Rob KB8RCO
 

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Hello N8JLK,

Which of your APRS stations shown on APRS.FI is hearing this ¡°X-Digi¡±/ ¡°CDM AL¡± station?? Looking on say (raw view), it's not showing it.

--David
KI6ZHD


On 03/18/2023 10:11 AM, J K via groups.io wrote:

Someone it seems must¡¯ve put together some ¡°X-Digi¡± device that is sending out a junk packet ever 30 seconds.  The ¡°sender¡± is ¡°CDM AL¡±, whatever that means, and of course DireWolf hates it because there is whitespace in the fourth position. The packet also says it¡¯s an ¡°X-Digi Test¡±.   (Whatever an X-Digi is.)

This has been going on now non-stop over a month.

You¡¯d think someone would notice their radio is TX¡¯ing ever 30 seconds.

What¡¯s the best way to tactfully approach this?  I suppose ¡°Fox hunting¡± is possible (would have to decode the signal while searching as there is a lot of traffic on APRS), but even if did find the sender what¡¯s the best approach to be tactful about it (some people can be weird if they think you are ¡°calling them out¡±).


Sent from my iPhone 13 Pro Max

 

¿ªÔÆÌåÓý

Thanks for the info. ?I did do a Google in it and see it was an upgrade card for TNC-X¡¯s. ?Looks like a nifty decide actually, (if it weren¡¯t TX¡¯ing every 30 seconds a bad packet): ?it¡¯s not that pressing, just annoying because I can¡¯t really use my LCD on RPi as intended because it¡¯s full of these errors beacons.

This is some more info:

¡ª-

Digipeater WIDE2 (probably K8YSE-1) audio level = 101(33/33) ? [NONE] ? :_||||___
[0.3] CDM AL>APRS,K8UI-5,K8YSE-1,WIDE2*:X-Digi Test.

ERROR!!! ?Unknown APRS Data Type Indicator "X"
Use of "APRS" in the destination field is obsolete. ?You can help to improve the quality of APRS signals.
Tell the sender (CDM AL) to use the proper product code from http://www.aprs.org/aprs11/tocalls.txt
Source Address, "CDM AL" contains character other than letter or digit in character position 4.

*** The origin and journey of this packet should receive some scrutiny. ***

¡ª¡ª-


13 Pro Max

On Mar 18, 2023, at 1:39 PM, Rob Giuliano via groups.io <kb8rco@...> wrote:

?On Sat, Mar 18, 2023 at 01:12 PM, J K wrote:
even if did find the sender what¡¯s the best approach to be tactful about it (some people can be weird if they think you are ¡°calling them out¡±).
Forgot to comment on the final part:
The starting point would be to point out the issue with the space in the "sender" section.
Then as making suggestions, bring up the rapid rate.
?
-------
Rob KB8RCO

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