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[aprssig] FREQ Object Formats

Bob Bruninga bruninga at usna.edu
Mon May 7 23:06:25 UTC 2012


> Would you be kind enough to check if an offset of -0.6M works...

PEOPLE... Let me clarify. "-0.6M" as well as "-gobbledygook" will work as
well as "-junk" as well as "this is crazy" will all "work" since NONE OF
THEM ARE offsets.  Hence, the radio will give up and use the existing
standard offset, which in the USA is -600 if the freq is below 146.999 MHz.

The only thing that "WORKS" properly is what is in the spec, +xxx or -xxx in
10's of KHz.    PERIOD.

Anything else will be interpreted as not an offset and the radio will use
its standard offset but IF AND ONLY IF it has one.  

Bob, Wb4APR




-----Original Message-----
From: aprssig-bounces at tapr.org [mailto:aprssig-bounces at tapr.org] On Behalf
Of Steve Daniels
Sent: Monday, May 07, 2012 6:41 PM
To: 'TAPR APRS Mailing List'
Subject: Re: [aprssig] FREQ Object Formats

Would you be kind enough to check if an offset of -0.6M works
Or the info I have that was tested by Mike works on this link
http://aprsisce.wikidot.com/doc:qsy
He tested it so I have no reason to believe it does not work

But since we are trying to get something a bit more standard going it helps
to check and at least be as compatible as possible

Steve Daniels
G6UIM
Torbay Freecycle Moderator

-----Original Message-----
From: aprssig-bounces at tapr.org [mailto:aprssig-bounces at tapr.org] On Behalf
Of la3qma at aprs.la
Sent: 07 May 2012 22:51
To: Lynn W. Deffenbaugh (Mr)
Cc: TAPR APRS Mailing List
Subject: Re: [aprssig] FREQ Object Formats

Quoting "Lynn W. Deffenbaugh (Mr)" <ldeffenb at homeside.to>:

> On 5/7/2012 5:02 PM, la3qma at aprs.la wrote:
>>
>> Inserting the actual offset is a no brainer and the receiving part
>> doesnt have to do anything other than set that offset.
>>
>> ;LA5BR    *111111z6024.76N/00521.64Er145.750MHz T097 -0600kHz
>> ;LA7BR    *111111z6023.06N/00514.98Er434.700MHz T097 -2000kHz
>>
>> This works for me on an modified TM-D710E and it should work on an
>> A and K model to.
>
> Are you sure the radio is actually using the -0600kHz part of that
> packet?  If you put in -0500kHz does it actually change the shift?
> Also, if you put -0505KHz, does it make a difference?  The spec only
> says -060 and I suspect the radio may be completely ignoring the 0kHz
> part of what you're transmitting.  Nice for human readability, but not
> part of the (current) standard.
>
>>

;LA5BR    *111111z6024.76N/00521.64Er145.750MHz T097 -0505kHz
Gives me an offset of 0.500MHz and also change the step to 5kHz

;LA5BR    *111111z6024.76N/00521.64Er145.750MHz T097 -0515kHz
;LA5BR    *111111z6024.76N/00521.64Er145.750MHz T097 -0525kHz
Gives me an error and does not QSY

;LA5BR    *111111z6024.76N/00521.64Er145.750MHz T097 -0550kHz
Works

;LA5BR    *111111z6024.76N/00521.64Er145.750MHz T097 -055
Works

;LA5BR    *111111z6024.76N/00521.64Er145.750MHz T097 -05
Works but is "rounded" up to be 0.600MHz

Kai Gunter
LA3QMA


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