[aprssig] mic-e: technical info or source code ??

Kristoff Bonne kristoff.bonne at skypro.be
Wed May 29 16:00:30 CDT 2013


Hi Lynn,


OK, this means that the mic-e messages on a voice-repeater are modulated 
the same way as the AFSK messages on 144.800.

In that case, I guess I can just let multimon-ng monitor the output 
frequency of our analog repeater. Correct?


73
kristoff - ON1ARF




On 29-05-13 22:37, Lynn W. Deffenbaugh (Mr) wrote:
> Mic-E is one form of coordinate and status encoding used by APRS which
> is AFSK modulation (1200/2200 Hz) of an AX.25 bit stream using
> exclusively UI packets.  The actual packet encoding is described in
> aprs101.pdf.
>
> Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32
>
> On 5/29/2013 4:28 PM, Kristoff Bonne wrote:
>> Hi,
>>
>> I'm trying to find the technical documentation on the mic-e protocol.
>> (i.e. the 300 ms burst to be send at the end of a voice transmission
>> on a repeater).
>>
>> There is a webpage on info.aprs.net, but that does not even mention
>> the modulation scheme, baudrate, etc.
>>
>> Is the open-source code available for decoding and encoding mic-e
>> transmissions? Is there an open-source hardware implementation of it?
>>
>>
>>
>> 73
>> kristoff - ON1ARF
>>
>> _______________________________________________
>> aprssig mailing list
>> aprssig at tapr.org
>> http://www.tapr.org/mailman/listinfo/aprssig
>>




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