[aprssig] DSTAR Freq in Status text?

Michael J. Wolthuis wolthui3 at msu.edu
Wed Mar 11 21:18:53 EDT 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. 

You can send freq. information if you use Pete's DPRSInterface with 
D-Star and an APRS program.  I don't think you can send a message 
outbound though via the D-Star GPS Message, but will read up on it.  I 
know you can not send inbound info due to the nature of D-Star, at least 

I'll keep experimenting and I am sure others have info also.  Maybe a 
DPRS Yahoogroup exists.... I'll check.


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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