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CX2SA > SATDIG 30.10.19 19:37l 634 Lines 19737 Bytes #999 (0) @ WW
BID : AMSATBB14391
Read: GUEST
Subj: AMSAT-BB-digest V14 391
Path: IW8PGT<IR2UBX<DB0RES<DB0OVN<DB0GOS<ON0AR<OZ5BBS<CX2SA
Sent: 191030/1727Z @:CX2SA.SAL.URY.SOAM #:17009 [Salto] FBB7.00e $:AMSATBB14391
From: CX2SA@CX2SA.SAL.URY.SOAM
To : SATDIG@WW
Today's Topics:
1. Gaston (NC) Radio Club "Intro to Satellites", Saturday, Nov 2
(Philip Jenkins)
2. AO-92 in L/v at 0212UTC (Andrew Glasbrenner)
3. AO-92 L Band (Robert Bankston)
4. IC-9700 & foxtelem 1.08p (Kevin)
5. Re: IC-9700 & foxtelem 1.08p (Alan)
6. Re: IC-9700 & foxtelem 1.08p (jeff griffin)
7. Re: IC-9700 & foxtelem 1.08p (jeff griffin)
8. Re: IC-9700 & foxtelem 1.08p (jeff griffin)
9. Re: IC-9700 & FoxTelem 1.08p (Alan)
10. Re: Secondary mission ideas (JoAnne K9JKM)
11. Re: IC-9700 & foxtelem 1.08p (Kevin)
12. LDPC for FPGAs to do DVB-S2/X on SDRs - so many letters! What
does it mean? (Michelle Thompson)
13. Re: IC-9700 & foxtelem 1.08p (jeff griffin)
----------------------------------------------------------------------
Message: 1
Date: Tue, 29 Oct 2019 21:28:04 -0400
From: Philip Jenkins <n4hf.philip@?????.???>
To: AMSAT BB <amsat-bb@?????.???>
Subject: [amsat-bb] Gaston (NC) Radio Club "Intro to Satellites",
Saturday, Nov 2
Message-ID:
<CAGdEbNY5ea-ZuJOR_cBSOH9q0pZD-iPZUWMXTd3475EihCbhCg@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
I'm giving a "Satellite 101" presentation to the Gaston RC (EM95) at their
monthly club meeting this Saturday at 2 pm local (Eastern).
http://www.gastonradioclub.org/default.aspx
I doubt I'll attempt to work any FM passes - except maybe attempt to listen
- as all of the passes around that time are 7 degrees or lower. There is
an AO-85 pass - 42 degrees - from 3:39pm to 3:51; if there are any GRC
members still around, I may try that one, using my call, N4HF.
Philip N4HF
------------------------------
Message: 2
Date: Tue, 29 Oct 2019 22:27:42 -0400
From: Andrew Glasbrenner <glasbrenner@??????????.???>
To: AMSAT bbs <amsat-bb@?????.???>
Subject: [amsat-bb] AO-92 in L/v at 0212UTC
Message-ID: <778B7F68-3A3E-440D-92EF-CF921F2C4099@??????????.???>
Content-Type: text/plain; charset=utf-8
That?s all.
73, Drew KO4MA
------------------------------
Message: 3
Date: Wed, 30 Oct 2019 02:29:56 +0000 (UTC)
From: Robert Bankston <ke4al@?????.???>
To: AMSAT BB <amsat-bb@?????.???>
Subject: [amsat-bb] AO-92 L Band
Message-ID: <1707839323.4226838.1572402596564@????.?????.???>
Content-Type: text/plain; charset=UTF-8
AO-92 was switched to Mode L/v at 02:12 UTC and will remain in that mode for
24 hours. Uplink is 1267.359 MHz, downlink is 145.880 MHz.
73, Robert, KE4AL
------------------------------
Message: 4
Date: Tue, 29 Oct 2019 22:20:21 -0700
From: Kevin <wa7fwf@?????.???>
To: amsat-bb@?????.???
Subject: [amsat-bb] IC-9700 & foxtelem 1.08p
Message-ID: <40826d1a-a415-401f-2a3e-feea6a2ec144@?????.???>
Content-Type: text/plain; charset=utf-8; format=flowed
Hi All,
? Any IC-9700 users out there that have switched to foxtelem 1.08p
using USB and IQ mode? I see a good eye but get zero decodes, dropping
back to 1.07y and it all starts working again.
73
Kevin WA7FWF
------------------------------
Message: 5
Date: Wed, 30 Oct 2019 01:20:43 -0500
From: Alan <wa4sca@?????.???>
To: Kevin <wa7fwf@?????.???>, "amsat-bb@?????.????
<amsat-bb@?????.???>
Subject: Re: [amsat-bb] IC-9700 & foxtelem 1.08p
Message-ID: <5db92bbb.1c69fb81.fda4d.2e1d@??.??????.???>
Content-Type: text/plain; charset="utf-8"
I you are using the Raised Cosine decoder, try the Windows Sinc instead.
73,
Alan
WA4SCA
From: Kevin via AMSAT-BB
Sent: Wednesday, October 30, 2019 12:21 AM
To: amsat-bb@?????.???
Subject: [amsat-bb] IC-9700 & foxtelem 1.08p
Hi All,
? Any IC-9700 users out there that have switched to foxtelem 1.08p
using USB and IQ mode? I see a good eye but get zero decodes, dropping
back to 1.07y and it all starts working again.
73
Kevin WA7FWF
_______________________________________________
Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
to all interested persons worldwide without requiring membership. Opinions
expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 6
Date: Wed, 30 Oct 2019 08:23:21 -0400
From: "jeff griffin" <kb2m@????.???>
To: "'Kevin'" <wa7fwf@?????.???>
Cc: amsat-bb@?????.???
Subject: Re: [amsat-bb] IC-9700 & foxtelem 1.08p
Message-ID: <008401d58f1c$d24c9c30$76e5d490$@???>
Content-Type: text/plain; charset="UTF-8"
Hi Kevin. I'm having the same problem with my 9700 in IQ mode, and ver
1.08p. I already contacted Chris about the problem.
73 Jeff kb2m
-----Original Message-----
From: AMSAT-BB [mailto:amsat-bb-bounces@?????.???? On Behalf Of Kevin via
AMSAT-BB
Sent: Wednesday, October 30, 2019 1:20 AM
To: amsat-bb@?????.???
Subject: [amsat-bb] IC-9700 & foxtelem 1.08p
Hi All,
Any IC-9700 users out there that have switched to foxtelem 1.08p
using USB and IQ mode? I see a good eye but get zero decodes, dropping
back to 1.07y and it all starts working again.
73
Kevin WA7FWF
------------------------------
Message: 7
Date: Wed, 30 Oct 2019 08:23:21 -0400
From: "jeff griffin" <kb2m@????.???>
To: "'Kevin'" <wa7fwf@?????.???>
Cc: amsat-bb@?????.???
Subject: Re: [amsat-bb] IC-9700 & foxtelem 1.08p
Message-ID: <008401d58f1c$d24c9c30$76e5d490$@???>
Content-Type: text/plain; charset="UTF-8"
Hi Kevin. I'm having the same problem with my 9700 in IQ mode, and ver
1.08p. I already contacted Chris about the problem.
73 Jeff kb2m
-----Original Message-----
From: AMSAT-BB [mailto:amsat-bb-bounces@?????.???? On Behalf Of Kevin via
AMSAT-BB
Sent: Wednesday, October 30, 2019 1:20 AM
To: amsat-bb@?????.???
Subject: [amsat-bb] IC-9700 & foxtelem 1.08p
Hi All,
Any IC-9700 users out there that have switched to foxtelem 1.08p
using USB and IQ mode? I see a good eye but get zero decodes, dropping
back to 1.07y and it all starts working again.
73
Kevin WA7FWF
------------------------------
Message: 8
Date: Wed, 30 Oct 2019 08:42:42 -0400
From: "jeff griffin" <kb2m@????.???>
To: <amsat-bb@?????.???>
Subject: Re: [amsat-bb] IC-9700 & foxtelem 1.08p
Message-ID: <009b01d58f1f$86048920$920d9b60$@???>
Content-Type: text/plain; charset="UTF-8"
I tried that yesterday and it didn't work....
73 Jeff kb2m
-----Original Message-----
From: AMSAT-BB [mailto:amsat-bb-bounces@?????.???? On Behalf Of Alan via
AMSAT-BB
Sent: Wednesday, October 30, 2019 2:21 AM
To: Kevin; amsat-bb@?????.???
Subject: Re: [amsat-bb] IC-9700 & foxtelem 1.08p
I you are using the Raised Cosine decoder, try the Windows Sinc instead.
73,
Alan
WA4SCA
From: Kevin via AMSAT-BB
Sent: Wednesday, October 30, 2019 12:21 AM
To: amsat-bb@?????.???
Subject: [amsat-bb] IC-9700 & foxtelem 1.08p
Hi All,
Any IC-9700 users out there that have switched to foxtelem 1.08p
using USB and IQ mode? I see a good eye but get zero decodes, dropping
back to 1.07y and it all starts working again.
73
Kevin WA7FWF
------------------------------
Message: 9
Date: Wed, 30 Oct 2019 07:56:18 -0500
From: "Alan" <wa4sca@?????.???>
To: "AMSAT-BB" <amsat-bb@?????.???>
Subject: Re: [amsat-bb] IC-9700 & FoxTelem 1.08p
Message-ID: <000001d58f21$6c3011c0$44903540$@?????.???>
Content-Type: text/plain; charset="us-ascii"
Hmmm. This trick has worked for some people, but apparently there is
another variable we are not aware of.
73,
Alan
WA4SCA
<-----Original Message-----
<From: AMSAT-BB [mailto:amsat-bb-bounces@?????.???? On Behalf Of jeff
<griffin via AMSAT-BB
<Sent: Wednesday, October 30, 2019 07:43 AM
<To: amsat-bb@?????.???
<Subject: Re: [amsat-bb] IC-9700 & foxtelem 1.08p
<
<I tried that yesterday and it didn't work....
<
<
<73 Jeff kb2m
<
<-----Original Message-----
<From: AMSAT-BB [mailto:amsat-bb-bounces@?????.???? On Behalf Of Alan
<via AMSAT-BB
<Sent: Wednesday, October 30, 2019 2:21 AM
<To: Kevin; amsat-bb@?????.???
<Subject: Re: [amsat-bb] IC-9700 & foxtelem 1.08p
<
<I you are using the Raised Cosine decoder, try the Windows Sinc instead.
<
<73,
<
<Alan
<WA4SCA
<
<
<From: Kevin via AMSAT-BB
<Sent: Wednesday, October 30, 2019 12:21 AM
<To: amsat-bb@?????.???
<Subject: [amsat-bb] IC-9700 & foxtelem 1.08p
<
<Hi All,
< Any IC-9700 users out there that have switched to foxtelem 1.08p
<using USB and IQ mode? I see a good eye but get zero decodes, dropping
<back to 1.07y and it all starts working again.
<
<73
<Kevin WA7FWF
<
<_______________________________________________
<Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
<to all interested persons worldwide without requiring membership. Opinions
<expressed
<are solely those of the author, and do not reflect the official views of
AMSAT-
<NA.
<Not an AMSAT-NA member? Join now to support the amateur satellite
<program!
<Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 10
Date: Wed, 30 Oct 2019 08:37:47 -0500
From: "JoAnne K9JKM" <joanne.k9jkm@?????.???>
To: "'AMSAT-BB'" <amsat-bb@?????.???>
Subject: Re: [amsat-bb] Secondary mission ideas
Message-ID: <5db99229.1c69fb81.5e1b6.086f@??.??????.???>
Content-Type: text/plain; charset="us-ascii"
The AMSAT-ID usage of IO-86 for scouts, etc. brought to mind another use of
the proposed payload. What if it was possible to build in a STEM aspect such
the usage of the FUNcubes which are planned for use by education programs
during the day - and, then available for amateur radio usage when the
satellite is in eclipse (assuming there are no school kids since it's before
or after school when it's dark outside).
Of course that means that besides the engineers and operations people
getting the satellite up there we'd need folks on the ground to create the
STEM mission. I've heard of a future AMSAT Youth Initiative on the table and
this might be a platform for that program to take off ... so to speak.
--
73 de JoAnne K9JKM
k9jkm@?????.???
------------------------------
Message: 11
Date: Wed, 30 Oct 2019 09:54:10 -0700
From: Kevin <wa7fwf@?????.???>
To: "amsat-bb@?????.???? <amsat-bb@?????.???>
Subject: Re: [amsat-bb] IC-9700 & foxtelem 1.08p
Message-ID: <ab59b10d-ee07-9226-704e-e2134154d43c@?????.???>
Content-Type: text/plain; charset=utf-8; format=flowed
Hi Alan and everyone else that replied,
? Windows Sinc also has zero decodes, tried all decoder modes.
for now 1.07y? FTW
Thanks
Kevin
On 10/29/2019 23:20, Alan wrote:
>
> I you are using the Raised Cosine decoder, try the Windows Sinc instead.
>
> 73,
>
> Alan
>
> WA4SCA
>
> *From: *Kevin via AMSAT-BB <mailto:amsat-bb@?????.???>
> *Sent: *Wednesday, October 30, 2019 12:21 AM
> *To: *amsat-bb@?????.??? <mailto:amsat-bb@?????.???>
> *Subject: *[amsat-bb] IC-9700 & foxtelem 1.08p
>
> Hi All,
>
> ? Any IC-9700 users out there that have switched to foxtelem 1.08p
>
> using USB and IQ mode? I see a good eye but get zero decodes, dropping
>
> back to 1.07y and it all starts working again.
>
> 73
>
> Kevin WA7FWF
>
> _______________________________________________
>
> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
>
> to all interested persons worldwide without requiring membership.
> Opinions expressed
>
> are solely those of the author, and do not reflect the official views
> of AMSAT-NA.
>
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
>
> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 12
Date: Wed, 30 Oct 2019 10:04:22 -0700
From: Michelle Thompson <mountain.michelle@?????.???>
To: AMSAT BB <amsat-bb@?????.???>
Subject: [amsat-bb] LDPC for FPGAs to do DVB-S2/X on SDRs - so many
letters! What does it mean?
Message-ID:
<CACvjz2UH5839i0djCOS4rV5asS+2tCHrasC2heV6o6CQf3WcQw@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
LDPC for FPGAs to do DVB-S2/X on SDRs - so many letters! What does it mean?
Greetings all!
Plenty going on in the open source amateur satellite scene! Here's where
Open Research Institute is going next with advanced forward error
correcting codes. We are doing our best to get them into as many FPGAs as
possible. This will amplify the capabilities of all those SDRs out there.
Open Research Institute is a 501(c)(3) dedicated to open source R&D for
amateur radio. We are particularly interested in technology that enables
modern digital microwave-band amateur satellite ground stations and
payloads. All of the work directly benefits all AMSAT organizations.
LDPC stands for low density parity check coding. It is a powerful forward
error correcting code, meaning it provides a huge amount of durability and
error correction for digital signals. LDPC is one of two error correcting
codes in DVB-S2 and DVB-S2X. The other is called BCH.
DVB-S2 is the most widely used satellite downlink standard and has become
widely adopted in amateur satellite work. DVB stands for digital video
broadcast. The S is satellite and the 2 is second edition. We replace the
MPEG layer, which is appropriate for commercial video broadcast, with a
generic data layer, which is more useful for hams. This switch boosts
bandwidth. MPEG has a lot of overhead. This "generic stream encapsulation"
protocol is called GSE. It comes from the same organization that makes DVB
standards. It's an open standard, like DVB-S2, and is already available in
GNU Radio and Wireshark due to some excellent volunteer work. GSE is a
drop-in replacement for MPEG in DVB-S2/X.
DVB-S2 will be heavily used on Gateway, is used by ARISS, and is a strong
contender for a wide variety of payloads currently being designed,
developed, integrated, and tested. It's also used terrestrially by a lot of
DATV enthusiasts.
The DVB-S2X (X means extension) codes work down to an SNR of -10dB on the
low signal strength end. The extension also adds more codes to the
higher-end. This allows for very powerful signals that are used by
high-throughput satellites. For amateur radio, we are generally more
interested in the very low SNR capabilities of DVB-S2X, but don't overlook
the available codes at the high SNR end!
Why is LDPC so great? It approaches the physical limits of what error
correcting codes can do. The only better code out there right now are Polar
codes, used in 5G. They're slightly better, but heavily encumbered by
licensing. Becoming familiar with LDPC gives you knowledge of a code with
cutting edge performance.
I gave a talk on coding theory and how LDPC works at TAPR DCC in 2018.
Here's a link to the video.
https://www.youtube.com/watch?v=XoEBps_J988&list=PLs_Ab58w9LI-p-j9C3uN8TjKh2Se
KlIvp&index=16
We have supported several types of LDPC work. Charles Brain's Nvidia
implementation (graphical processing unit) was demonstrated at Reno
Symposium in 2017. A copy of this work is in the Phase 4 Ground repository.
Ahmet Inan's general purpose processor implementation has been incorporated
into GNU Radio and leandvb and more. His original work can be found here:
https://github.com/xdsopl/LDPC
This is all open source work that is needed for projects like Phase 4
Ground and Space. It's freely available for anyone to use, and people are
using it.
Now, we're working on getting LDPC decode into field programmable gate
arrays, or FPGAs. Why? Because it's the best architectural fit for the very
parallel algorithms in LDPC codes. Another huge benefit is that decode can
be moved from a general purpose processor to an FPGA co-processor. This
frees up resources in any off the shelf software defined radio (SDR) and
makes for much more powerful receivers for amateur satellites that use
DVB-S2/X.
Getting to this stage took three years of hard work from a long list of
amazing volunteers and enthusiasts and donors. Many of them are on this
list. Thank you so much for the support. There is no way that this could
happen without you.
The beginning of the VHDL implementation is here:
https://github.com/aicodix/cnp
What do we need? Review and feedback, awareness and support. Advice on
formal verification would be helpful. Documentation is a must.
What's the next major milestone? We hope to demonstrate a complete Lunar
Gateway style station that uses this FPGA work next year at the Tokyo Ham
Fair. We aim to have this be part of our Openrotor project.
Openrotor is a heavy-duty open source rotator and controller project. If
you are interested in that, let me know - it's off to a good start with
volunteers on three continents, but there's some expertise gaps that still
need filling. It must support a 2m dish at 10 GHz and not be so loud the
neighbors complain. It will speak MQTT and use other common interfaces
(hamlib, N1MM).
More soon!
-Michelle W5NYV
------------------------------
Message: 13
Date: Wed, 30 Oct 2019 13:20:14 -0400
From: "jeff griffin" <kb2m@????.???>
To: <amsat-bb@?????.???>
Subject: Re: [amsat-bb] IC-9700 & foxtelem 1.08p
Message-ID: <00a201d58f46$4b804d80$e280e880$@???>
Content-Type: text/plain; charset="utf-8"
I'm going to wait for the fix for the 9700. In the meantime I'm now
collecting telemetry with my FIAB with a eggbeater antenna setup that I'm
going to leave up here for the winter. I'm seeing a much better decode rate
with 1.08p over 1.07y, about 2 to 1. So I'm seeing 1.08 is clearly better
then 1.07. Thanks Chris!
73 Jeff kb2m
-----Original Message-----
From: AMSAT-BB [mailto:amsat-bb-bounces@?????.???? On Behalf Of Kevin via
AMSAT-BB
Sent: Wednesday, October 30, 2019 12:54 PM
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] IC-9700 & foxtelem 1.08p
Hi Alan and everyone else that replied,
Windows Sinc also has zero decodes, tried all decoder modes.
for now 1.07y FTW
Thanks
Kevin
On 10/29/2019 23:20, Alan wrote:
>
> I you are using the Raised Cosine decoder, try the Windows Sinc instead.
>
> 73,
>
> Alan
>
> WA4SCA
>
> *From: *Kevin via AMSAT-BB <mailto:amsat-bb@?????.???>
> *Sent: *Wednesday, October 30, 2019 12:21 AM
> *To: *amsat-bb@?????.??? <mailto:amsat-bb@?????.???>
> *Subject: *[amsat-bb] IC-9700 & foxtelem 1.08p
>
> Hi All,
>
> Any IC-9700 users out there that have switched to foxtelem 1.08p
>
> using USB and IQ mode? I see a good eye but get zero decodes, dropping
>
> back to 1.07y and it all starts working again.
>
> 73
>
> Kevin WA7FWF
>
> _______________________________________________
>
> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
>
> to all interested persons worldwide without requiring membership.
> Opinions expressed
>
> are solely those of the author, and do not reflect the official views
> of AMSAT-NA.
>
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
>
> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
>
_______________________________________________
Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
to all interested persons worldwide without requiring membership. Opinions
expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Subject: Digest Footer
_______________________________________________
Sent via amsat-bb@?????.???.
AMSAT-NA makes this open forum available to all interested persons worldwide
without requiring membership. Opinions expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
Not an AMSAT member? Join now to support the amateur satellite program!
https://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
End of AMSAT-BB Digest, Vol 14, Issue 391
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