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ZL3AI > APRDIG 16.07.03 16:58l 282 Lines 9743 Bytes #999 (0) @ WW
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Subj: TAPR Digest, Jul 13, 1/4
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To : APRDIG@WW
TAPR APRS Special Interest Group Digest for Sunday, July 13, 2003.
1. Re: PHGR
2. Re: PHGR
3. New Linear Transponder HELP needed (+2)
4. Re: PHGR
5. 6M Packet Freq? 1200bps
6. Re: PHGR
7. Re: 6M Packet Freq? 1200bps
8. Re: New Linear Transponder HELP needed (+2)
9. PSK-31 Transponder notes.
10. PHGr Calculator On-line
11. Wanted to buy due to lightning strike
12. Re: Wanted to buy due to lightning strike
13. Re: WINAPRS Registration Turn Around Time?
14. Re: PHGR
15. Re: WINAPRS Registration Turn Around Time?
16. Re: PHGR
17. Re: [ Bob Bruninga ] New Linear Transponder HELP needed (+2)
18. Re: PHGR
19. PHGR
20. packet repeater?
21. Re: packet repeater?
22. Re: packet repeater?
23. Re: packet repeater?
24. Re: packet repeater?
25. Re: packet repeater?
26. Re: packet repeater?
27. Re: packet repeater?
28. Re: 6M Packet Freq? 1200bps
29. NOSaprs 1.15b6 ready + brand new documentation
30. Re: packet repeater?
31. Re: 6M Packet Freq? 1200bps
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Subject: Re: PHGR
From: "Ev Tupis (W2EV)" <w2ev@arrl.net>
Date: Sun, 13 Jul 2003 08:38:39 -0400
X-Message-Number: 1
David Thege wrote:
>Thiswekend I decided to experiemnt with the PHGR code as suggested by Bob
>B. I find that on my Kenwoods (D-7 & 700) the power reading is displayed at
>2w when use PHGR and the 4 characters plus the one for rate. If I use just
>PHG and the 4 character codes it displays right. Has anyone else looked
>into this? I have this set up on my base using UI-VEIW 32 V 1.94
Hi Dave,
Pardon my ignorance...I'm not a Kenwood D-transceiver user. You mention
UI-View (which doesn't include support for /PHG) along with the D-7xxx
transceiver (which I must presume supports /PHG in some way).
Are you saying that, when TXing from a system hooked up to UI-View, sending
/PHGr...your D-7xxx displayes the wrong value for P?
Would you mind copying both transmission frames to the SIG so we could have
a look?
Ev, W2EV
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Subject: Re: PHGR
From: "Dave Thege" <dthege@conpoint.com>
Date: Sun, 13 Jul 2003 10:00:27 -0500
X-Message-Number: 2
N0XBN-5>APU25E,N0XBN*,WIDE,WIDE: <UI>:
>131424zPHG2130/N0XBN@ARRL.NET
Displays correct values on Kenwood D-7 & D-700.
N0XBN-5>APU25E,N0XBN*,WIDE,WIDE: <UI>:
>131447zPHGR21303/N0XBN@ARRL.NET
Power rating displays as 2w. Other parameters are wrong too but can be
adjusted to read right.
I have this setup in my status text on Ui-view hooked up to a KPC3 and
TM_261. I monitored it on my D7 to get the parameters right. It appears the
Kenwoods look for a numerical value in the 4th position and any thing else
defaults to 2w.
Dave N0XBN
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Subject: New Linear Transponder HELP needed (+2)
From: Bob Bruninga <bruninga@usna.edu>
Date: Sun, 13 Jul 2003 11:04:16 -0400 (EDT)
X-Message-Number: 3
On Sun, 13 Jul 2003, Andrew VK4TEC wrote:
>Do you think that PSK will play a big role with APRS in the future ?
No. PSK-31 is a human QSO mode.
>Even a PSK satellite beacon would be great. >
Yes, weak signal satellites have always used PSK to save power.
I'd love to see someone calculate the link budget needed to do cubesat
telemetry using PSK-31. My guess is that is would be less than 50 mW and
that sure is a boon to the extremely limited power on a cubesat.
But even on 10m downlink, the Doppler is so high that to maintain tracking
would require new DSP code (1500 hZ of Doppler, while 1 Hz accuracy is
required)
But we have lots of talent that can write that kind of code.
And By the way, I gotta fix my web page on Monday. I had Roger Barker
(UI-view) instaed of Peter Martinez listed as the PSK-31 guru.
A slip of the brain cells... I do know the difference... ;-)
de WB4APR@amsat.org, Bob
CUBESAT Designs http://www.ew.usna.edu/~bruninga/craft.html
----------------------------------------------------------------------
Subject: Re: PHGR
From: Bob Bruninga <bruninga@usna.edu>
Date: Sun, 13 Jul 2003 11:06:56 -0400 (EDT)
X-Message-Number: 4
On Sat, 12 Jul 2003, David Thege wrote:
>Thiswekend I decided to experiemnt with the PHGR code as suggested by Bob
>B. I find that on my Kenwoods (D-7 & 700) the power reading is displayed at
>2w when use PHGR and the 4 characters plus the one for rate. If I use just
>PHG and the 4 character codes it displays right. Has anyone else looked
>into this? I have this set up on my base using UI-VEIW 32 V 1.94
This is good feedback. Maybe it wont work. I'd like to see someone
compile a list of what software accepts PHGR (and ignores the R which it
should for now) and still displays the 4 digits properly. No one is
decoding PHGR, we just want to see if it is backwards compatible with
PHG...
de WB4APR@amsat.org, Bob
PCsat WEB page http://www.ew.usna.edu/~bruninga/pcsat.html
ISS-APRS FAQ: http://www.ew.usna.edu/~bruninga/iss-faq.html
CUBESAT Designs http://www.ew.usna.edu/~bruninga/cubesat.html
APRS LIVE pages http://www.ew.usna.edu/~bruninga/aprs.html
APRS SATELLITES http://www.ew.usna.edu/~bruninga/astars.html
MIM/Mic-E/Mic-Lite http://ssdl.stanford.edu/mims/
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Subject: 6M Packet Freq? 1200bps
From: "Matthew Stennett" <wa4tkg@iwon.com>
Date: Sun, 13 Jul 2003 11:11:34 -0400 (EDT)
X-Message-Number: 5
I know it's been on here before, but I don't recall.
Isn't there a frequency on 6M for 1200bps packet?
As 145.010 is a National freq, what is it for 6?
(BBS; NOT APRS {isn't there an APRS freq on 6 too?})
----------------------------------------------------------------------
Subject: Re: PHGR
From: "Ev Tupis (W2EV)" <w2ev@arrl.net>
Date: Sun, 13 Jul 2003 11:25:23 -0400
X-Message-Number: 6
>N0XBN-5>APU25E,N0XBN*,WIDE,WIDE: <UI>:
>>131424zPHG2130/N0XBN@ARRL.NET
>Displays correct values on Kenwood D-7 & D-700.
>
>N0XBN-5>APU25E,N0XBN*,WIDE,WIDE: <UI>:
>>131447zPHGR21303/N0XBN@ARRL.NET
>Power rating displays as 2w. Other parameters are wrong too but can be
>adjusted to read right.
A-ha! :) The culprit has been identified! :)
The correct format is: PHG21303/
This assumes 3-TX's per hour (one every 20 minutes).
The spec limits PHG to 7-bytes total. The new PHGr construct (see P.S.
below) offers an *additional* convention by using the "/" character as an
end-of field indicator, allowing for variable length fields to be sent
without breaking anything in the process.
The last byte will be ignored by all spec-compliant systems in place
today...but the hope is that authors will build-in the new variable length
system over time.
Give it a try and tell us what you get.
Ev, W2EV
PS- From Bob's website:
------------------------------------------------------------------------
By adding it to PHG, it is 100% backwards compatible to existing
parsing of PHG data... To give it a name, instead of "PROBES" we simply
call it the "PHGR" data... Here is the FORMAL SPEC for PHGR:
PHG is (and remains) "PHGabcd........"
PHGR is "PHGabcdr/......
Where a,b,c,d are as defined in the APRS spec.
Where r is the integer rate of PHGR packets XMTD in packets per hour
expressed as a single byte 1-9 and A-Z (A is 10 for example).
And we add a specific "/" separator between the PHGR and any following
text to help flag this as the new PHGR format. All existing software on
receive should still receive the "PHGabcd" with no impact, since no
following character was ever specified.. And since the only field that
follows a PHG is a variable length free-text comment field (except DF),
the addition of the "/" on the front of that field does not disrupt
understanding of the comment field.
On transmit, most client applications transmit either a "/" or a SPACE
as a separator before any free text that follows anyway, and these
delimiters are ignored as leading delimiters in the free field
comment text, so in this case, we are just forcing that now to be a "/"
to add reliability in recognizing the new PHGR digit.
----------------------------------------------------------------------
Subject: Re: 6M Packet Freq? 1200bps
From: "Ev Tupis (W2EV)" <w2ev@arrl.net>
Date: Sun, 13 Jul 2003 11:32:35 -0400
X-Message-Number: 7
Matthew Stennett wrote:
>
>I know it's been on here before, but I don't recall.
>Isn't there a frequency on 6M for 1200bps packet?
>As 145.010 is a National freq, what is it for 6?
>(BBS; NOT APRS {isn't there an APRS freq on 6 too?})
Hi Matt,
Originally, it was 53.530 FM. All activity has now moved to 50.620 FM.
Things are configured differently there, though (due to the continent-wide
collision domain that 6 meters offers). Visit: http://www.PropNET.org for
more information.
PropNET is APRS, repurposed for propagation study. There's even an
Internet Server to connect to!
Ev, W2EV
----------------------------------------------------------------------
Subject: Re: New Linear Transponder HELP needed (+2)
From: "Ev Tupis (W2EV)" <w2ev@arrl.net>
Date: Sun, 13 Jul 2003 11:48:49 -0400
X-Message-Number: 8
Bob Bruninga wrote:
>On Sun, 13 Jul 2003, Andrew VK4TEC wrote:
>
>>Do you think that PSK will play a big role with APRS in the future ?
>
>No. PSK-31 is a human QSO mode.
Actually...in a more general sense (more general than the thread about
satellite operation, that is), PSK31 is already being used for APRS
operation.
See http://www.PropNET.org
PropNET^31 is APRS repurposed for propagation study and includes checksum
information making it extremely reliable for both non-human and human
communication.
Ev, W2EV
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