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CX2SA > SATDIG 27.07.11 19:57l 667 Lines 20219 Bytes #999 (0) @ WW
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Subj: AMSAT-BB-digest V6 398
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Sent: 110727/1750Z @:CX2SA.LAV.URY.SA #:18632 [Minas] FBB7.00e $:AMSATBB6398
From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: Full Duplex? (Nigel A. Gunn, W8IFF/G8IFF)
2. AO-7 Mode A vs. Mode B Performance (John Papay)
3. FUNcube Vibration Testing Videos (Trevor .)
4. CQ PE1RAH (Joe Leikhim)
5. ISS (Kevin Deane)
6. Re: CQ PE1RAH (Joe)
7. Re: Full Duplex? (Jeffrey Koehler)
8. ARISSatTLM (n0jy@xxxxxxx.xxxx
9. SatPC32 and IC-821H (Paul Delaney - K6HR)
10. Re: CQ PE1RAH (Andy Brian)
11. Re: SatPC32 and IC-821H (Tom Schaefer, NY4I)
12. Re: Repair of SSB Preamp/Downconverter (i8cvs)
13. Re: Full Duplex? (John M. Belstner)
14. Re: Full Duplex? (David 4X1DG)
15. Re: Full Duplex? (Thomas Schaefer)
16. OK I could not let this one go (Kevin Deane)
17. Re: Full Duplex (WILLIAMS MICHAEL)
18. Re: ARISSatTLM (Roland Zurmely)
----------------------------------------------------------------------
Message: 1
Date: Wed, 27 Jul 2011 14:44:22 +0100
From: "Nigel A. Gunn, W8IFF/G8IFF" <nigel@xxxxx.xxx>
Subject: [amsat-bb] Re: Full Duplex?
To: Mike <mikef1234@xxxxxxxxxxxxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <4E301636.8060209@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
A link is FULL DUPLEX if you and the other station are both receiving
and transmitting simultaneously.
It is HALF DUPLEX if you can both receive and transmit but NOT
simultaneously (as on your local FM repeater or a packet satellite link).
It is SIMPLEX if you can receive OR transmit but not both (as in a
telemetry transmission).
On 07/27/2011 01:25 PM, Mike wrote:
> I'm having a difficult time of understanding the concept of Full Duplex. Can
> anyone explain it to me? I have the ARRL satellite book, read about it in
> there and Wikipedia. I still didn't understand how it works with a
> transceiver setup like we use.
>
>
>
> Mike N8GBU
>
>
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 2
Date: Wed, 27 Jul 2011 09:54:43 -0400
From: John Papay <john@xxxxxx.xxx>
Subject: [amsat-bb] AO-7 Mode A vs. Mode B Performance
To: amsat-bb@xxxxx.xxx
Message-ID: <134824.68262.qm@xxxxxxx.xxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
There is a huge difference in signal quality between
Mode A and Mode B on AO-7. I've been working Europe on
Mode A days and have found that the audio quality is
excellent. I've experimented with higher power levels
to see how the transponder performs and have found that
it can handle the highest power levels on the uplink
without fm'ing, distorting or creating images across
the passband. Of course it is harder to hear with severe
fading on a horizontal beam antenna, but it is very usable.
This morning there were three French stations on in Mode A.
F6FLE was pounding away on CW and loud. But there was no
apparent degradation of the other voice stations using the
transponder at the same time. Strong CW on Mode B just kills
voice readability and strength on other stations. No images
were heard, the passband was quiet except for other ham radio
transmissions.
I have several antennas for 10m. The one I use for Europe
is a 5 element beam at 120'. It can see the horizon in all
directions and can hear AO-7 when it is below the horizon.
For higher elevations I use a single element at about 15 feet.
The Mode B transponder never sounds very good. And it seems
to be in a power limited situation even when there are no
ham radio transmissions in the passband. What you do hear is
all kinds of noise and I suspect this noise is the culprit in
robbing all of the available power to run the transmitter. The
noise moves and is probably being received from ground sources,
hence the apparent doppler. User stations sound choppy even when
running minimal power. When you run more power, signals FM and
images are heard within the passband. The question is what is
the source of all the crud that AO-7 is hearing in Mode B? After
all, 432 is supposed to be used for weak signal operation and should be
very quiet. Are there issues within the satellite that contribute
to this?
If you were a user of AO-7 back in the 70's, what was Mode B like
back then? Of course it had a better power source when the batteries
were still functional, but was the signal/audio quality much better?
Did it FM and was the audio choppy?
We are very fortunate to have AO-7 regardless of the performance issues.
It is challenging to work at low elevations but the payoff is worth it.
What we would really appreciate here in North America is more activity
from Europe on the passes that reach the across the Atlantic. Last week
I had a qso with IK8YSS in Mode B, 7554KM. I have seen his callsign in
the AO-7 logbook for a long time and finally we had a mutual window with
good conditions. LA4FPA/p was on yesterday as promised from JP22. AO-7
might not be the HEO that many wish we had, but it is the highest bird
we have right now. Let's use it while we still have it.
73,
John K8YSE
------------------------------
Message: 3
Date: Wed, 27 Jul 2011 15:10:38 +0100 (BST)
From: "Trevor ." <m5aka@xxxxx.xx.xx>
Subject: [amsat-bb] FUNcube Vibration Testing Videos
To: amsat-bb@xxxxx.xxx
Message-ID:
<1311775838.86077.YahooMailClassic@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
Two videos showing vibration testing of the AMSAT-UK FUNcube satellite.
This video shows the general layout of the RAL vibration testing facility,
and includes interviews with Graham and David at the conclusion of our
testing.
http://vimeo.com/26951186
This is a short video showing what happens during a 'high sine' test. The
test is being performed in the Z axis. Hold your breath!!
http://vimeo.com/26954073
The AMSAT-UK International Space Colloquium is to be held July 30-31 at the
Holiday Inn, Guildford, GU2 7XZ, England. The event is open to all.
Either day passes or full packages comprising overnight accommodation and
meals are available. For futher information see
http://www.uk.amsat.org/colloquium-2011/
The Colloquium schedule, times in BST (GMT+1), is at
http://tinyurl.com/2011ColloquiumSchedule
There will be a live webstream at http://www.batc.tv/ch_live.php?ch=3
Join the FUNcube Yahoo Group: http://groups.yahoo.com/group/FUNcube/
The Spring issue of the AMSAT-UK newsletter OSCAR News can be downloaded
free at http://www.uk.amsat.org/on_193_final.pdf
Join AMSAT-UK at http://tinyurl.com/JoinAMSAT-UK/
----
73 Trevor M5AKA
------------------------------
Message: 4
Date: Wed, 27 Jul 2011 10:26:38 -0400
From: Joe Leikhim <rhyolite@xxxxxxxx.xxx>
Subject: [amsat-bb] CQ PE1RAH
To: amsat-bb@xxxxx.xxx
Message-ID: <4E30201E.5070207@xxxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
I am trying to reach William Leijenaar PE1RAH
(LeijenaarElectronics@xxxxx.xxxx about his U/V 30 KHz linear transponder
model LE005-R2.
I get no response to his e-mails. Is there a better e-mail for him?
--
Joe Leikhim
K4SAT
407-982-0446
------------------------------
Message: 5
Date: Wed, 27 Jul 2011 07:38:32 -0700
From: Kevin Deane <summit496@xxxx.xxx>
Subject: [amsat-bb] ISS
To: <amsat-bb@xxxxx.xxx>
Message-ID: <COL107-W11431EBA427BEB7824261283350@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
Hello All
Today 12/02/2009 at 14:40 to 14:50 UTC
I have broken by previous record of posting 9 messages in one
pass to ISS BBS by posting 12 messages to international space station
BBS , I have sent 12 messages to 11 hams they had a post on ISS
Wow
Kevin
KF7MYK
------------------------------
Message: 6
Date: Wed, 27 Jul 2011 09:50:32 -0500
From: Joe <nss@xxx.xxx>
Subject: [amsat-bb] Re: CQ PE1RAH
To: amsat-bb@xxxxx.xxx
Message-ID: <4E3025B8.6060301@xxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Good Luck I have sent dozens, no bounces, and no replies either.
Joe WB9SBD
The Original Rolling Ball Clock
Idle Tyme
Idle-Tyme.com
http://www.idle-tyme.com
On 7/27/2011 9:26 AM, Joe Leikhim wrote:
> I am trying to reach William Leijenaar PE1RAH
> (LeijenaarElectronics@xxxxx.xxxx about his U/V 30 KHz linear transponder
> model LE005-R2.
>
> I get no response to his e-mails. Is there a better e-mail for him?
>
------------------------------
Message: 7
Date: Wed, 27 Jul 2011 08:17:05 -0700 (PDT)
From: Jeffrey Koehler <jeffk13057@xxxxx.xxx>
Subject: [amsat-bb] Re: Full Duplex?
To: "mikef1234@xxxxxxxxxxxxxxx.xxxx <mikef1234@xxxxxxxxxxxxxxx.xxx>,
"amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>, "zack.kd8ksn@xxxxxxx.xxxx
<zack.kd8ksn@xxxxxxx.xxx>
Message-ID:
<1311779825.8423.androidMobile@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
And knowing whether or not you're hitting the bird at all...
73 Jeff WB2SYK FN13xc Syracuse
Sent from Yahoo! Mail on Android
------------------------------
Message: 8
Date: Wed, 27 Jul 2011 10:21:32 -0500 (CDT)
From: n0jy@xxxxxxx.xxx
Subject: [amsat-bb] ARISSatTLM
To: amsat-bb@xxxxx.xxx
Message-ID: <38017.170.49.217.216.1311780092.squirrel@xxxxxxx.xxx>
Content-Type: text/plain;charset=iso-8859-1
I downloaded ARISSatTLM and in the Quick Start guide I notice that it says
Windows Vista ? not working on this platform at this time
Not being deterred I loaded and ran it anyway and it did choke when trying
to start the sound card, with a Windows "stopped working" type of dialog.
I found that if I quickly click CANCEL on that dialog, things seem to work
fine. The tuning shows indications of signal that were verified by
playing with the input level and tuning a CW signal (on HF) which
ARISSatTLM decoded.
I run two sound cards, one being the built in which I use for the typical
Windows stuff and sounds and games and then an M-Audio Delta 44 which is
for the radio input/output for sound card modes. I don't know if that has
anything to do with the way this works.
So I thought I would share that with you, if you are running Vista you may
be able to run ARISSatTLM despite the disclaimer.
If anyone knows where to find a .wav file of the latest data sizes for the
satellite that I could run on ARISSatTLM, please let me know so that I
might verify that the telemetry decode works too. I found some on the
development web site but I think they're old and of a different dataset
size. Anyway they didn't work.
73,
Jerry
N?JY
------------------------------
Message: 9
Date: Wed, 27 Jul 2011 08:21:38 -0700
From: "Paul Delaney - K6HR" <paul.hamradio@xxxxxxx.xxx>
Subject: [amsat-bb] SatPC32 and IC-821H
To: "'AMSAT'" <AMSAT-BB@xxxxx.xxx>
Message-ID: <936FEB7700A3413BADF12F69D5C176DF@xxxxxx>
Content-Type: text/plain; charset=US-ASCII
Hello!
Is anyone using SatPC32 with an ICOM 821H?
Does bandswitching work, or do you have to switch bands manually?
Paul Delaney - K6HR
paul.hamradio@xxxxxxx.xxx
http://k6hr.dyndns.org:8080
------------ sent dozens, ?no bounces, ?and no replies either.
>
> Joe WB9SBD
>
> The Original Rolling Ball Clock
> Idle Tyme
> Idle-Tyme.com
> http://www.idle-tyme.com
>
> On 7/27/2011 9:26 AM, Joe Leikhim wrote:
>> I am trying to reach William Leijenaar PE1RAH
>> (LeijenaarElectronics@xxxxx.xxxx about his U/V 30 KHz linear transponder
>> model LE005-R2.
>>
>> I get no response to his e-mails. Is there a better e-mail for him?
>>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 11
Date: Wed, 27 Jul 2011 11:41:42 -0400
From: "Tom Schaefer, NY4I" <ny4i@xxxx.xxx>
Subject: [amsat-bb] Re: SatPC32 and IC-821H
To: "Paul Delaney - K6HR" <paul.hamradio@xxxxxxx.xxx>
Cc: 'AMSAT' <AMSAT-BB@xxxxx.xxx>
Message-ID: <E70E77FF-E953-47D6-BC22-301B5E02EAE7@xxxx.xxx>
Content-Type: text/plain; charset=us-ascii
I tried my 821H with SatPC32 and MacDoppler. MacDoppler will change the
frequencies but you have to set the mode. I never got it to work with
SatPC32. The CIV command set is quite limited in the 821 so you cannot do
all the things you do with th either Icom SAT radios.
Tom Schaefer, NY4I
ny4i@xxxx.xxx
EL88pb
Monitoring EchoLink node KJ4FEC-L 489389
DSTAR Capable APRS: NY4I-15
On Jul 27, 2011, at 11:21 AM, Paul Delaney - K6HR wrote:
>
> Hello!
>
> Is anyone using SatPC32 with an ICOM 821H?
> Does bandswitching work, or do you have to switch bands manually?
>
> Paul Delaney - K6HR
> paul.hamradio@xxxxxxx.xxx
> http://k6hr.dyndns.org:8080
>
>
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 12
Date: Wed, 27 Jul 2011 17:48:55 +0200
From: "i8cvs" <domenico.i8cvs@xxx.xx>
Subject: [amsat-bb] Re: Repair of SSB Preamp/Downconverter
To: "Sion Chow Q. C. \(9W2QC\)" <9w2qc@xxxxx.xxx>, "Amsat - BBs"
<amsat-bb@xxxxx.xxx>
Message-ID: <002c01cc4c74$b10c6a80$0401a8c0@xxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Hi Sion, 9M2CQC
I strongly suggest you to send the SP-7000 and the UEK-3000 to
the SSB Electronics in Germany at the attention of Mr Barcoviack
73" de
i8CVS Domenico
----- Original Message -----
From: "Sion Chow Q. C. (9W2QC)" <9w2qc@xxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Wednesday, July 27, 2011 11:07 AM
Subject: [amsat-bb] Repair of SSB Preamp/Downconverter
> Dear All,
>
> I remember asking on this list before about sources to repair a> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 13
Date: Wed, 27 Jul 2011 10:25:38 -0700 (PDT)
From: "John M. Belstner" <jbelstner@xxxxx.xxx>
Subject: [amsat-bb] Re: Full Duplex?
To: Mike <mikef1234@xxxxxxxxxxxxxxx.xxx>, amsat-bb@xxxxx.xxx
Message-ID:
<1311787538.36903.YahooMailRC@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Hi Mike,
Others have answered the question quite well. One additional point I'd like
to
make is how important it is to actually listen to your yourself on the
downlink,
for a couple reasons.
1. On an FM bird, if you can't hear yourself or you hear a double... Stop
transmitting
2. On a linear transponder (CW, SSB), use only enough uplink transmit power to
be heard on the downlink.
For #2, the rule of thumb is to compare your downlink signal strength to
that of
the satellite's beacon and adjust your uplink power so your downlink does not
exceed that. A satellite PA can only put out so much power (say 1W). So if
your uplink is 20 dB stronger at the satellite than anyone else's, your
downlink
could be transmitted at .99W leaving only 10mW for the rest of the QSO's in
the
passband.
73
John Belstner W9EN
Valley Center, CA DM13le
----- Original Message ----
> From: Mike <mikef1234@xxxxxxxxxxxxxxx.xxx>
> To: amsat-bb@xxxxx.xxx
> Sent: Wed, July 27, 2011 5:25:49 AM
> Subject: [amsat-bb] Full Duplex?
>
> I'm having a difficult time of understanding the concept of Full Duplex.
Can
> anyone explain it to me? I have the ARRL satellite book, read about it in
> there and Wikipedia. I still didn't understand how it works with a
> transceiver setup like we use.
>
>
>
> Mike N8GBU
>
>
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 14
Date: Wed, 27 Jul 2011 15:51:26 +0300
From: "David 4X1DG" <4x1dg@xxxx.xxx>
Subject: [amsat-bb] Re: Full Duplex?
To: "Mike" <mikef1234@xxxxxxxxxxxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <4061BE7887BF44838443D757830458D5@xxxxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Mike,
It depends on the transceiver that you have.
Essentially the up link and down link are using different bands, U and V for
example.
If you transmit on a V uplink your transmission is transmitted back on the
downlink on a U frequency.
If your transceiver is capable of duplex operation, you can hear your own
transming the same thing as their
> transponder is :-)
>
> -When you hear your / another signal in the receiver, presuming it and the
> transmitter are tuned to the right frequencies, it represents what you or
> other stations are transmitting to the satellite.
>
> Does that help?
>
> 73,
>
> Lowell
> K9LDW
>
>
>
> ------ Original Message ------
> Received: Wed, 27 Jul 2011 07:29:45 AM CDT
> From: "Mike" <mikef1234@xxxxxxxxxxxxxxx.xxx>
> To: <amsat-bb@xxxxx.xxx>
> Subject: [amsat-bb] Full Duplex?
>
>> I'm having a difficult time of understanding the concept of Full Duplex.
> Can
>> anyone explain it to me? I have the ARRL satellite book, read about it in
>> there and Wikipedia. I still didn't understand how it works with a
>> transceiver setup like we use.
>>
>>
>>
>> Mike N8GBU
>>
>>
>>
>> _______________________________________________
>> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
>> Not an AMSAT-NA member? Join now to support the amateur satellite program!
>> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
>
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 16
Date: Wed, 27 Jul 2011 06:59:54 -0700
From: Kevin Deane <summit496@xxxx.xxx>
Subject: [amsat-bb] OK I could not let this one go
To: <amsat-bb@xxxxx.xxx>
Message-ID: <COL107-W6260964A76DFFDAFE035FE83350@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
Hello All
Today 12/02/2009 at 14:40 to 14:50 UTC
I have broken by previous record of posting 9 messages in one
pass to ISS BBS by posting 12 messages to international space station
BBS , I have sent 12 messages to 11 hams they had a post on ISS
Wow, you guys thought I was Bad? Selfish I think the word was...
Kevin
KF7MYK
------------------------------
Message: 17
Date: Wed, 27 Jul 2011 07:46:36 -0700 (PDT)
From: WILLIAMS MICHAEL <k9qho6762@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: Full Duplex
To: amsat-bb@xxxxx.xxx
Message-ID:
<1311777996.75030.YahooMailClassic@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
To me, operating full duplex is like talking on the telephone. I don't
hesitate to interrupt while the other person is talking to ask a question or
just add something to the subject. Four persons in a full duplex round table
can chat like sitting at a real wood round table. It's fun.
Mike, K9QHO
------------------------------
Message: 18
Date: Wed, 27 Jul 2011 10:23:29 -0700 (PDT)
From: Roland Zurmely <py4zbz@xxxxx.xxx>
Subject: [amsat-bb] Re: ARISSatTLM
To: AMSAT <amsat-bb@xxxxx.xxx>
Message-ID:
<1311787409.57146.YahooMailNeo@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Hi Jerry,
The test file for ARISSat telemetry is here:
https://svn.sarpeidon.net/viewvc/suitsat2/ground_station_software/ARISSatTLM/i
nstall-staging/Sample_ARISSat_Recording1.WAV
73 de Roland PY4ZBZ.
------------------------------
_______________________________________________
Sent via amsat-bb@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
http://amsat.org/mailman/listinfo/amsat-bb
End of AMSAT-BB Digest, Vol 6, Issue 398
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