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[aprssig] DSTAR Freq in Status text?

Bob Bruninga bruninga at usna.edu
Thu Mar 12 03:14:21 UTC 2009


> This is the packet I get when attempting 
> this.  I'll try and compare it with 
> aprs.org/localinfo.html
>
> KB8ZGL>API282,DSTAR*,qAR,WX8GRRC:
> /120139z4311.43N/08520.20Wj039/000/147.290Mhz 
> DStar

That should work fine.

> I would guess the j039/000/  is the part 
> that is kicking the freq. out of the 10th byte?

No, that is the jeep symbol and CSE/SPD so they should be just fine.  I would think that that should work.  And if that is being generated by DPRS, then I guess the issue is resolved and things are just peachy in APRSville...

Great!
Bob, Wb4APR

>
>
>Bob Bruninga wrote:
>>> Where is the spec on this?  I haven't 
>>> been able to easily locate it.  I 
>>> could then answer some of my own questions. 
>>>     
>>
>> www.aprs.org/localinfo.html
>>
>>   
>>> You can send freq. information if you 
>>> use Pete's DPRSInterface with D-Star 
>>> and an APRS program. 
>>>     
>>
>> Last time I looked, DPRS forces a certain format and will not allow the FFF.FFFMHz to be in the required leading 10 byte location for it to be part of the APRS Frequency Spec.  Yes, last ime I looked, DPRS can include frequency, but not in the right place to make it parseable in APRS.
>>
>>   
>>> Bob Bruninga wrote:
>>>     
>>>>> Is there anyway I can denote that it is 
>>>>> DStar and not analog in my Status text?  
>>>>> ie. FFF.FFF d* or something like that?  
>>>>> I would like people to know I am not on 
>>>>> analog at the time when I have d* on.
>>>>>     
>>>>>         
>>>> Unfortunately I have been unsuccessful in encouraging the DPRS conversion to implement the FFF.FFFMHz part of the APRS format.  I do understand that D* and APRS are apples and oranges, but since the fact that the packet was originated on DSTAR is coded elsewhere in the packet, it could be easy to distinguish.
>>>>
>>>>   
>>>>       
>>>>> Will other d-710s only pickup the freq if it 
>>>>> has Mhz as the last 3 characters of the 10? 
>>>>>     
>>>>>         
>>>> Yes, that is the "spec" it must be FFF.FF?MHz with the ? being a digit or a space...
>>>>
>>>> My hope is that we have the best integration of D* and APRS as possible.  I do not have any DSTAR equipment, so if you have any ideas how we can better cross communicate these systems, I am all ears.  Especially in light of the Universal HAM Messaging Initiative: www.aprs.org/aprs-messaging.html that is attempting to make sure any ham system can text message any ham on any system from any system.
>>>>
>>>> Bob, WB4APR
>>>>
>>>> Bob Bruninga wrote: 
>>>>   
>>>>       
>>>>>> I have my RC-d710 now talking through my Icom 
>>>>>> 2820.  I was wondering, is there anyway to 
>>>>>> format the Status Text transmitted to include 
>>>>>> frequency you are on like a d710? 
>>>>>>      
>>>>>>       
>>>>>>           
>>>>> Sure, just put FFF.FFFMHz in the status text 
>>>>> of the D710.  That is the standard APRS format 
>>>>> introduced in APRS1.2.  It must be the first 
>>>>> 10 bytes of free-text in the position comment 
>>>>> or status fields. 
>>>>>
>>>>> I had also proposed that the DPRS interface 
>>>>> to the DSTAR system would include the frequency 
>>>>> in those packets gated from DPRS into the APRS 
>>>>> system, but I was unsuccessful in convincing 
>>>>> the right people of the value of being 
>>>>> compatible with the frequency field. 
>>>>>
>>>>> If that was done, then not only could we see 
>>>>> the locations of DSTAR users on APRS, but we 
>>>>> could also see their operating frequency for 
>>>>> a return call. 
>>>>>
>>>>> Bob, Wb4APR 
>>>>>     
>>>>>         
>>>>
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>>>>   
>>>>       
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>>
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>
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