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Thread: ASTRO25 Air interface logging feature

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    Default ASTRO25 Air interface logging feature

    Hi Guys,

    A P25 radio tech over at RR posted up some issues he was having while integrating XTS5000s into his Harris P25 system. In short, he escalated the issue to Motorola and Harris, and Motorola then explained how to use an XTS5000, with the programming lead and a basic RS232 terminal program (Hyperterminal) to create dump files of the P25 traffic from the air interface.

    Does anyone know more about this? It sounds like a very neat feature indeed that could come in handy.

    The link is here --> http://forums.radioreference.com/pro...ml#post1762001

    Cheers,
    Matt


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    This sounds very interesting. By using the serial cable (this works with the USB cable too, as it emulates a modem device) and a serial terminal package such as Hyperterm, you can issue modem-type dialog commands to the radio and it will respond variously. I have written up a semi-complete documentation of the modem commands that exist and those that I have been able to figure out to date. I have never tried to send the radio under modem control an emergency blast to see what the receiving radio does, but that sounds like what they were doing.

    Anyway, here's my Astro25 "Modem mode" documentation:
    Attached Files Attached Files

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    Purely a guess here but could #SUMODE=0 (0,1) relate to Tactical OTAR use since that's the only place I've seen the term SU (Subscriber Unit) used?

    The KVL is connected to the RF Modem via a serial data cable during TOTAR.
    Andrew

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    It was probably radio debugger, APX have that too.

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    After playing with this on my XTS5k, I got the radio to perform a XLTINPUT Log Dump.

    It appears to dump the debug data from the radio.

    Enter AT&DEBUG mode
    then, DUMP


    While monitoring a local P25 system events like APCO_RX_TSBK, APCO_SYNC_DETECT and APCO_RX_LC are logged.

    Still playing with it to see what else can be extracted.

    -b

    Update, well it seems it was as simple as entering debug mode and typing a '?'.

    The debugger help output is attached.

    capture.txt
    Last edited by bsdam; Oct 02, 2012 at 10:25 PM. Reason: found a bit more

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    Bloody awesome - this is fantastic info!!

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    "TSBK:RX:<20-digit TSBK> Simulates the RX of a TSBK. The 20-digit number does not contain the CRC."

    $20 to the first person that sends an inhibit packet to their own radio using this feature

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    Or for that matter, an uninhibit packet!

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    Quote Originally Posted by Alpha View Post
    By using the serial cable (this works with the USB cable too, as it emulates a modem device)
    Hi Alpha,

    I have access to a Motorola DM 3600 with a USB (CPS) cable.

    What steps must I take to use this feature please ?
    (Simple steps please as I am a Radio Ignoramous )

    cheers
    OF

    (RS232 and Hayes Modem commands are my native vintage )

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    From what I have heard the Trbo radios also have a built-in debugger, but it's very dumbed-down from the version that's in the XTS and Astro radios. The APX and TRBO radios have this feature, but instead of it appearing as a modem-like device to the PC, it now appears as a network-like device. I believe if you Telnet to a specific port # you can also access the debugger features, but they are very limited in their command sets now. Perhaps someone will chime in with the procedure, or if you do a bit of searching on the site maybe you'll find it.

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    Thanks for that - I'll go and make a request over in the topic in MotoTRBO section.