Order Tray | Contact Us | Home | SIG Lists

[aprssig] FREQ Object radio issues (b)

Ron Stordahl, AE5E ronn5in-aprssig at yahoo.com
Tue May 8 17:00:40 UTC 2012

I started all this ruckus on April 26 when I raised the issue of proper format to set up a D710A one button QSY.  

Based upon all the discussion I am returning to essentially my original proposal to send:

;146.85TRF*111111z4804.29N/09606.79WrTOFF -060 R30m
;444.80TRF*111111z4807.60N/09610.63WrT156 +500 R15m

Correct me if I am wrong but I believe this complies with the specification.  I realize including the offset on VHF is not necessary, but it gives me some satisfaction from the point of consistency to do so and makes it more understandable to the human reader.  Additionally one of our VHF repeaters on 147.00 has a non standard -600KHz shift when the standard is +600KHz, thus at least for that one -060 is required.  

I have just completed setting up these objects for 12 area repeaters, scattered over about 125 miles in NorthWestern Minnesota served by 8 APRS digipeaters.  Thankfully they are remotely programmable and can be reached from my central location directly or by up to 2 hops.  When remote programming is no longer possible, when these MFJ1270C's UIDIGI-ROM's die, I am finished as well!

Ron, AE5E

> From: Bob Bruninga <bruninga at usna.edu>
>To: 'TAPR APRS Mailing List' <aprssig at tapr.org> 
>Sent: Tuesday, May 8, 2012 10:54 AM
>Subject: [aprssig] FREQ Object radio issues (b)
>Here are some more notes I have found on some known problems:
>Use of the "xyz" in the OBJECT NAME: 
>> FFF.FF0xy object is OK and QSY is OK
>> FFF.FF5xy object is OK and QSY is OK
>> FFF.FFxyz object will not QSY in early D710 models.  Now fixed.
>> FFF.FFxyz objects of any format will not QSY the FTM-350 (confirm?)
>Extra "0" on end of the +xxx or -xxx OFFSET format.  The THD72 will accept
>extra characters after the required +xxx or -xxx.  These will all give the
>proper offset:
>> 440.000MHz tOFF +500 Bob's radio 
>> 440.000MHz tOFF +5000 Bob's radio 
>> 440.000MHz tOFF +5000Bob's radio
>> 440.000MHz tOFF +5000000 Bob's radio
>> 440.000MHz tOFF +500Bob's radio
>BUT SHOULD N OT BE USED until confirmed all existing radios can tolerate it.
>This was a proposed backwards-compatible future fix to making the offset
>more human readable, because then we could recommend the use of +5000
>instead of the +500.  But this CANNOT BE USED until we have surveyed all
>radios to see if ALL radios can properly set the offset if the additional
>"0" is included.  Or all radios are upgraded to do so
>Here are some other known issues for the Compatibility table of position
>Leading space:   (required, required-not, don't care) - (Y, N, X)
>Xmits space:     (Transmits leading space) - (Y, N)
>Requires "MHz":  (Requires mixed case, allows any case)     - (Y, N)
>Requires "MHz_": (Requires trailing space) - (Y, N)
>Xmits MHz_:      (Transmits trailing space) - (Y, N)
>Responds to +xxx and -xxx offsets - (Y, N)
>Transmits offsets +xxx and -xxx   - (Y, N)
>Allows extra trailing zero so that +600 works, where only +60 is IAW spec -
>(Y, N)
>aprssig mailing list
>aprssig at tapr.org
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.tapr.org/pipermail/aprssig/attachments/20120508/6a1f3624/attachment.htm>

More information about the aprssig mailing list