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[aprssig] DSTAR Freq in Status text?

Bob Bruninga bruninga at usna.edu
Thu Mar 12 01:26:36 UTC 2009


> 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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