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CX2SA > SATDIG 21.12.09 06:03l 996 Lines 32170 Bytes #999 (0) @ WW
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Sent: 091221/0356Z @:CX2SA.LAV.URY.SA #:26639 [Minas] FBB7.00e $:AMSATBB4673
From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: 847 PL problems (Alan P. Biddle)
2. XW-1 Linear Mode over North America Audio 20Dec2009 (John Papay)
3. Re: 847 PL problems (Jeff KB2M)
4. Re: 847 PL problems (Jeff KB2M)
5. Re: Preamp location tech question (i8cvs)
6. AO-51 mode change 20 Dec 2009 (Mark L. Hammond)
7. Re: AO-51 mode change 20 Dec 2009 (Mark L. Hammond)
8. Re: Preamp location tech question (Elan Portnoy)
9. XW-1 QSO and packet attempt (Mark L. Hammond)
10. Re: XW-1 QSO and packet attempt (Sebastian)
11. XW-1 North America FM 21Dec2009 0205z Audio (John Papay)
12. Re: XW-1 QSO and packet attempt (Andrew Glasbrenner)
13. help (w3vvp)
14. Re: 847 PL problems (Luc Leblanc)
15. Re: UHF QRM from HAM stations!! (Art McBride)
----------------------------------------------------------------------
Message: 1
Date: Sun, 20 Dec 2009 14:03:48 -0600
From: "Alan P. Biddle" <APBIDDLE@xxxxxx.xxx>
Subject: [amsat-bb] Re: 847 PL problems
To: "'Jeff KB2M'" <kb2m@xxxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <EE9A3614BE80436794FED8298ED340F8@xxxxxx>
Content-Type: text/plain; charset="us-ascii"
Jeff,
Do you have a PL tone stored in the current satellite channel? Some time
back, 2-3 years, I found that there seemed to be a conflict in programming
the PL frequency if one was stored in memory. I switched to another
satellite channel without a PL tone stored, and the problem went away. I
just let SATPC32 take care of it. Easy enough to check, unless all your
satellite channels have tones stored.
Good luck,
Alan
WA4SCA
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Jeff KB2M
Sent: 20 December, 2009 11:03
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] 847 PL problems
I just noticed that my FT-847 is having a problem with PL tones. There are a
few things happening...
It seems to want to stay only in a PL of 67.0. When I try to operate on
SO-67 that has a PL of 233.6, I can't get into the bird, unless I tailgate.
As it seems to default to a PL of 67.0 I can work SO-50 no problem. I
checked all my cables, and also went to a different software control program
and it all points to a problem with my 847. After some testing with
different PL's, using another radio with TQSL set, it seems that when in
Satellite mode my 847 will only transmit a PL of 67. I've had my 847 I
bought new since 1997 and I never had a problem with This. When I look back
I can't remember when I needed any other PL other then 67.0, except 74.4 to
open up SO-50, last time about 3 years ago. Before I try a full reset I
thought I would ask here, to make sure I'm not missing anything stupid...
73 Jeff kb2m
_______________________________________________
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: Sun, 20 Dec 2009 15:12:01 -0500
From: John Papay <john@xxxxxx.xxx>
Subject: [amsat-bb] XW-1 Linear Mode over North America Audio
20Dec2009
To: amsat-bb@xxxxx.xxx
Message-ID: <461152.98719.qm@xxxxxxx.xxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
The first linear mode pass over North America was really
active. The recording can be heard on my webserver:
http://www.papays.com/XW-1_20Dec2009_022218z.mp3
A recording of the FM pass will be uploaded later. The
link will be on a future posting.
Congratulations to the Chinese Team for this very nice
satellite.
73,
John K8YSE
------------------------------
Message: 3
Date: Sun, 20 Dec 2009 16:30:29 -0500
From: "Jeff KB2M" <kb2m@xxxxxxx.xxx>
Subject: [amsat-bb] Re: 847 PL problems
To: <APBIDDLE@xxxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <004001ca81bb$a7b11bf0$f71353d0$@xxx>
Content-Type: text/plain; charset="us-ascii"
I kinda remembered having that problem myself Alan. I tried different sat
memory's one with PL and one without, but I still could only get a PL of 67.
I did a full reset, and that fixed the problem. I also forgot that I had a
copy of FTBasicMMO, so I stored all memories, before I did the reset, then
restored. All is back to normal. So I don't know what happened as I'm using
the same memories. I just tested it with a sat memory in background that
contained a pl of 67, then with a non PL memory in background. Both ways let
me run SatPC32 with SO-67 with a pl of 233.6. I think you and me are the
only one's who have experienced this problem! Thanks for the sanity
check....
73 Jeff kb2m
-----Original Message-----
From: Alan P. Biddle [mailto:APBIDDLE@xxxxxx.xxxx
Sent: Sunday, December 20, 2009 3:04 PM
To: 'Jeff KB2M'; amsat-bb@xxxxx.xxx
Subject: RE: [amsat-bb] 847 PL problems
Jeff,
Do you have a PL tone stored in the current satellite channel? Some time
back, 2-3 years, I found that there seemed to be a conflict in programming
the PL frequency if one was stored in memory. I switched to another
satellite channel without a PL tone stored, and the problem went away. I
just let SATPC32 take care of it. Easy enough to check, unless all your
satellite channels have tones stored.
Good luck,
Alan
WA4SCA
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Jeff KB2M
Sent: 20 December, 2009 11:03
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] 847 PL problems
I just noticed that my FT-847 is having a problem with PL tones. There are a
few things happening...
It seems to want to stay only in a PL of 67.0. When I try to operate on
SO-67 that has a PL of 233.6, I can't get into the bird, unless I tailgate.
As it seems to default to a PL of 67.0 I can work SO-50 no problem. I
checked all my cables, and also went to a different software control program
and it all points to a problem with my 847. After some testing with
different PL's, using another radio with TQSL set, it seems that when in
Satellite mode my 847 will only transmit a PL of 67. I've had my 847 I
bought new since 1997 and I never had a problem with This. When I look back
I can't remember when I needed any other PL other then 67.0, except 74.4 to
open up SO-50, last time about 3 years ago. Before I try a full reset I
thought I would ask here, to make sure I'm not missing anything stupid...
73 Jeff kb2m
_______________________________________________
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: 4
Date: Sun, 20 Dec 2009 16:31:07 -0500
From: "Jeff KB2M" <kb2m@xxxxxxx.xxx>
Subject: [amsat-bb] Re: 847 PL problems
To: "'Erich Eichmann'" <erich.eichmann@xxxxxxxx.xx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <004101ca81bb$be114230$3a33c690$@xxx>
Content-Type: text/plain; charset="us-ascii"
I fixed the problem with a full reset. In fact this one of the few times
that a full reset actually fixed my problem with a radio! I'm sorry I wasn't
as clear as I should have been in describing my problem. I did say that I
could set a PL other than 67.0 when I didn't have the 847 in satellite mode.
When I took it out of sat mode I could achieve a PL of other then 67.0. I
also mentioned that it used to work, for at least 10 years. Weird problem,
that thankfully was easy to fix...
> and it all points to a problem with my 847. After some testing with
> different PL's, using another radio with TQSL set, it seems that when in
> Satellite mode my 847 will only transmit a PL of 67. I've had my 847 I
> bought new since 1997 and I never had a problem with This.
73 Jeff fkb2m
-----Original Message-----
From: Erich Eichmann [mailto:erich.eichmann@xxxxxxxx.xxx
Sent: Sunday, December 20, 2009 2:07 PM
To: Jeff KB2M
Cc: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] 847 PL problems
Hello Jeff,
SatPC32 sets the FT-847 sub tone frequency for SO-67 (233.6 Hz) correctly.
I suppose you have the following data line added to SubTone.SQF:
SO-67,233.6,$01,36
The Parameter $01 is the code of the FT-847 for a 233.6 tone. .
To check the tone frequency do the following:
Select SO-67. CAT steering must be on (C+)
Click the control T0 to T1. Above the VHF uplink freqence an "ENC" appears.
Disable CAT (C-).
At the radio switch the bands. The VHF frequency must be on the left side.
Now press the "Menu" button at the FT-847 and select menu #12.
In the display you will see the tone frequency 233.6.
73s, Erich, DK1T
----- Original Message -----
From: "Jeff KB2M" <kb2m@xxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Sunday, December 20, 2009 6:03 PM
Subject: [amsat-bb] 847 PL problems
>I just noticed that my FT-847 is having a problem with PL tones. There are
>a
> few things happening...
> It seems to want to stay only in a PL of 67.0. When I try to operate on
> SO-67 that has a PL of 233.6, I can't get into the bird, unless I
> tailgate.
> As it seems to default to a PL of 67.0 I can work SO-50 no problem. I
> checked all my cables, and also went to a different software control
> program
> and it all points to a problem with my 847. After some testing with
> different PL's, using another radio with TQSL set, it seems that when in
> Satellite mode my 847 will only transmit a PL of 67. I've had my 847 I
> bought new since 1997 and I never had a problem with This. When I look
> back
> I can't remember when I needed any other PL other then 67.0, except 74.4
> to
> open up SO-50, last time about 3 years ago. Before I try a full reset I
> thought I would ask here, to make sure I'm not missing anything stupid...
>
>
> 73 Jeff kb2m
>
>
>
> _______________________________________________
> 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: 5
Date: Sun, 20 Dec 2009 23:23:40 +0100
From: "i8cvs" <domenico.i8cvs@xxx.xx>
Subject: [amsat-bb] Re: Preamp location tech question
To: "Elan Portnoy" <elanportnoy@xxxxx.xxx>, "amsat bb"
<amsat-bb@xxxxx.xxx>
Message-ID: <003a01ca81c3$15323c20$0201a8c0@xxx.xx>
Content-Type: text/plain; charset="iso-8859-1"
Hi Elan,
You don't mention the model of preamplifiers from ARR that you are
using but I suppose that you got the better between the tree models
available i.e. the SP144VDG 144-148 MHz with NF = 0.55 dB and the
SP432VDG 420-450 MHz with NF= 0.55 dB
Now if you add between the antenna and preamplifiers 50 feet of coax cable
LMR400 then the loss of 0.75 dB at 144 MHz and the loss of 1.35 dB at
435 MHz adds to the Noise Figure of your preamplifiers so that it is like
to have:
a 144 MHz preamplifier with an overall NF = 0.55 + 0.75 = 1.3 dB
a 435 MHz preamplifier with an overall NF = 0.55 + 1.35 = 1.9 dB
Supposing that you have the preamplifier antenna mounted working out
the numbars for 144 MHz we get:
Noise Figure NF = 0.55 dB
Noise Factor F = 10^(NF/10) = 10^0.055 = 1.13
The equivalent Noise Temperature T = (1.13 -1 ) x 290 = 39 kelvin
If you live in a rural area at 144 MHz the equivalent Noise Antenna
Temperature T1=200 kelvin so that your Tsys1=39+200= 239 kelvin
Let see what happens if you mount the preamplifier in the shack:
Overall Noise Figure = 0.55 + 0.75 = 1.3 dB
Overall Noise Factor F = 10^(10/1.3) = 10^0.13 = 1.35
The equivalent Noise Temperature T = (1.35-1) x 290 = 101 kelvin
Since the antenna is the same Tsys2 = 101+200 = 301 kelvin
The improvement putting the preamplifier antenna mounted
against shack mounted is
10 log (Tsys2 / Tsys1 ) = 10 log (301 / 239 ) = 1.0 dB
10 10
The improvement at 144 MHz is very small because the Antenna
Temperature = 200 kelvin predominates.
Let see the situation for 435 MHz were the Antenna Temperature is
less and only 50 kelvin in a rural area
Preamplifier antenna mounted:
Noise Figure NF = 0.55 dB
Noise Factor F = 10^(NF/10) = 10^0.055 = 1.13
The equivalent Noise Temperature T = (1.13 -1 ) x 290 = 39 kelvin
If you live in a rural area the equivalent Noise Antenna Temperature
T1 = 50 kelvin so that your Tsys1 = 39 + 50 = 89 kelvin
Preamplifier in the shak:
Overall Noise Figure = 0.55 + 1.35 = 1.9 dB
Overall Noise Factor F = 10^(10/1.9) = 10^0.19 = 1.55
The equivalent Noise Temperature T = (1.55-1) x 290 = 159 kelvin
Since the antenna is the same Tsys2 = 159 +50 = 209 kelvin
The improvement with the preamplifier antenna mounted against
shack mounted is
10 log (Tsys2 / Tsys1 ) = 10 log (209 / 89 ) = 3.7 dB
10 10
The improvement in 435 MHz is greater because the Antenna
Temperature = 50 kelvin do not predominates over the equivalent
Preamplifier Noise Temperature.
By the way 3.7 dB of more swing in the S meter over the noise is
more than half of a S point so that in your situation I would put
only the 435 MHz preamplifier at the antenna and would leave
the 144 MHz preamplifier in the shack.
CONCLUSION:
Since the loss of 50 feet of LMR400 is very small the advantage
in (S+N)/N ratio to put the low noise preamplifiers antenna mounted
is only 1 db at 144 MHz and 3.7 dB at 435 MHz in a rural area.
If the installation is made in a suburban area or in a urban area where
the equivalent Antenna Noise level is greater and predominates then
the advantages are accordingly less.
I hope this helps.
73" de
i8CVS Domenico
----- Original Message -----
From: "Elan Portnoy" <elanportnoy@xxxxx.xxx>
To: "amsat bb" <amsat-bb@xxxxx.xxx>
Sent: Sunday, December 20, 2009 6:40 PM
Subject: [amsat-bb] Re: Preamp location tech question
> Well, it's clear what I should do. Will try remounting on masts as soon as
weather permits. Looking forward to improvements in performance.
>
> Thanks to all and happy holidays!
------------------------------
Message: 6
Date: Sun, 20 Dec 2009 17:50:43 -0500
From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
Subject: [amsat-bb] AO-51 mode change 20 Dec 2009
To: amsat-bb@xxxxx.xxxx ao51-modes@xxxxx.xxx
Message-ID: <4b2eaa41.4801be0a.793d.11a7@xx.xxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Hi All,
Around 2230UTC 20 Dec 2009 the mode on AO-51 was changed according to the
posted schedule as follows:
December 21 - December 28
FM Repeater, V/U
Uplink: 145.920 MHz FM
Downlink: 435.300 MHz FM
9k6 BBS, L/U
Uplink: 1268.700 MHz 9k6 FM
Downlink: 435.150 MHz 9k6 FM
The FM Repeater on TXB (435.300) is at about 450mW, while the BBS on TXB
(435.150) is at about 500mW. Signals on both transmitters sounded fine.
The digipeater on TXB is "ON." We are collecting telemetry (every 30 secs)
for the next 24 hours.
Thanks for the S-band activity during the previous mode period!
73 on behalf the AO-51 Command Team,
Mark L. Hammond [N8MH]
------------------------------
Message: 7
Date: Sun, 20 Dec 2009 19:18:09 -0500
From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
Subject: [amsat-bb] Re: AO-51 mode change 20 Dec 2009
To: amsat-bb@xxxxx.xxxx ao51-modes@xxxxx.xxx
Message-ID: <4b2ebec0.c501be0a.3822.1125@xx.xxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Okay--of course the digipeater is on the digital downlink, TXA (435.150). I
typed it wrong and corrected it below..sorry about that, folks!
73,
Mark N8MH
> Hi All,
>
> Around 2230UTC 20 Dec 2009 the mode on AO-51 was changed
> according to the posted schedule as follows:
>
> December 21 - December 28
>
> FM Repeater, V/U
> Uplink: 145.920 MHz FM
> Downlink: 435.300 MHz FM
>
> 9k6 BBS, L/U
> Uplink: 1268.700 MHz 9k6 FM
> Downlink: 435.150 MHz 9k6 FM
>
>
> The FM Repeater on TXB (435.300) is at about 450mW, while the
> BBS on TXB (435.150) is at about 500mW. Signals on both
> transmitters sounded fine. The digipeater on TXA is "ON." We
> are collecting telemetry (every 30 secs) for the next 24 hours.
>
> Thanks for the S-band activity during the previous mode period!
>
> 73 on behalf the AO-51 Command Team,
>
> Mark L. Hammond [N8MH]
Mark L. Hammond [N8MH]
------------------------------
Message: 8
Date: Sun, 20 Dec 2009 17:29:53 -0800 (PST)
From: Elan Portnoy <elanportnoy@xxxxx.xxx>
Subject: [amsat-bb] Re: Preamp location tech question
To: amsat bb <amsat-bb@xxxxx.xxx>, i8cvs <domenico.i8cvs@xxx.xx>
Message-ID: <24511.99139.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
Yes, thank you for that detailed explanation and analysis.
Best 73,
Elan
--- On Sun, 12/20/09, i8cvs <domenico.i8cvs@xxx.xx> wrote:
> From: i8cvs <domenico.i8cvs@xxx.xx>
> Subject: Re: [amsat-bb] Re: Preamp location tech question
> To: "Elan Portnoy" <elanportnoy@xxxxx.xxx>, "amsat bb" <amsat-bb@xxxxx.xxx>
> Date: Sunday, December 20, 2009, 4:23 PM
> Hi Elan,
>
> You don't mention the model of preamplifiers from ARR that
> you are
> using but I suppose that you got the better between the
> tree models
> available i.e. the SP144VDG 144-148 MHz with NF = 0.55 dB
> and the
> SP432VDG 420-450 MHz with? NF= 0.55 dB
>
> Now if you add between the antenna and preamplifiers 50
> feet of coax cable
> LMR400 then the loss of 0.75 dB at 144 MHz and the loss of
> 1.35 dB at
> 435 MHz adds to the Noise Figure of your preamplifiers so
> that it is like
> to have:
>
> a 144 MHz preamplifier with an overall NF = 0.55 + 0.75 =
> 1.3 dB
> a 435 MHz preamplifier with an overall NF = 0.55 + 1.35 =
> 1.9 dB
>
> Supposing that you have the preamplifier antenna mounted
> working out
> the numbars for 144 MHz we get:
>
> Noise Figure NF = 0.55 dB
> Noise Factor F = 10^(NF/10) = 10^0.055 = 1.13
> The equivalent Noise Temperature T? = (1.13 -1 ) x 290
> = 39 kelvin
> If you live in a rural area at 144 MHz the equivalent Noise
> Antenna
> Temperature T1=200 kelvin so that your Tsys1=39+200= 239
> kelvin
>
> Let see what happens if you mount the preamplifier in the
> shack:
>
> Overall Noise Figure = 0.55 + 0.75 = 1.3 dB
> Overall Noise Factor? F = 10^(10/1.3) = 10^0.13 =
> 1.35
> The equivalent Noise Temperature T = (1.35-1) x 290 = 101
> kelvin
> Since the antenna is the same Tsys2 = 101+200 = 301 kelvin
>
> The improvement putting the preamplifier antenna mounted
> against shack mounted is
>
> 10 log? ???(Tsys2 / Tsys1 ) = 10
> log???(301 / 239 ) = 1.0 dB
> ? ? ? ? ???10?
> ? ? ? ? ? ? ? ?
> ? ? ? ? ? ? ? ?
> ? ? ???10
>
> The improvement at 144 MHz is very small because the
> Antenna
> Temperature = 200 kelvin predominates.
>
> Let see the situation for 435 MHz were the Antenna
> Temperature is
> less and only 50 kelvin in a rural area
>
> Preamplifier antenna mounted:
>
> Noise Figure NF = 0.55 dB
> Noise Factor F = 10^(NF/10) = 10^0.055 = 1.13
> The equivalent Noise Temperature T? = (1.13 -1 ) x 290
> = 39 kelvin
> If you live in a rural area the equivalent Noise Antenna
> Temperature
> T1 = 50 kelvin so that your Tsys1 = 39 + 50 = 89 kelvin
>
>
> Preamplifier in the shak:
>
> Overall Noise Figure = 0.55 + 1.35? = 1.9 dB
> Overall Noise Factor? F = 10^(10/1.9) = 10^0.19 =
> 1.55
> The equivalent Noise Temperature T = (1.55-1) x 290 = 159
> kelvin
> Since the antenna is the same Tsys2 = 159 +50 = 209 kelvin
>
>
> The improvement with the preamplifier antenna mounted
> against
> shack mounted is
>
> 10 log? ???(Tsys2 / Tsys1 ) = 10
> log???(209 / 89 ) = 3.7 dB
> ? ? ? ? ???10?
> ? ? ? ? ? ? ? ?
> ? ? ? ? ? ? ? ?
> ? ? ???10
>
> The improvement in 435 MHz is greater because the Antenna
> Temperature = 50 kelvin do not predominates over the
> equivalent
> Preamplifier Noise Temperature.
>
> By the way 3.7 dB of more swing in the S meter over the
> noise is
> more than half of a S point so that in your situation I
> would put
> only the 435 MHz preamplifier at the antenna and would
> leave
> the 144 MHz preamplifier in the shack.
>
> CONCLUSION:
>
> Since the loss of 50 feet of LMR400 is very small the
> advantage
> in (S+N)/N ratio to put the low noise preamplifiers antenna
> mounted
> is only 1 db at 144 MHz and 3.7 dB at 435 MHz in a rural
> area.
> If the installation is made in a suburban area or in a
> urban area where
> the equivalent Antenna Noise level is greater and
> predominates then
> the advantages are accordingly less.
>
> I hope this helps.
>
> 73" de
>
> i8CVS Domenico
>
> ----- Original Message -----
> From: "Elan Portnoy" <elanportnoy@xxxxx.xxx>
> To: "amsat bb" <amsat-bb@xxxxx.xxx>
> Sent: Sunday, December 20, 2009 6:40 PM
> Subject: [amsat-bb] Re: Preamp location tech question
>
>
> > Well, it's clear what I should do. Will try remounting
> on masts as soon as
> weather permits. Looking forward to improvements in
> performance.
> >
> > Thanks to all and happy holidays!
>
>
>
>
------------------------------
Message: 9
Date: Sun, 20 Dec 2009 21:36:39 -0500
From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
Subject: [amsat-bb] XW-1 QSO and packet attempt
To: amsat-bb@xxxxx.xxx
Message-ID: <4b2edf35.6202be0a.4c3b.13c6@xx.xxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
I was happy to make a QSO on the FM repeater of XW-1 tonight during the
0210utc 21 Dec 2009 pass, and tried some packet too.
Signals were S9 or better (didn't really look carefully). Audio was loud
and clear on all stations I heard.
I was able to get connected to the BBS, but unable to upload a small file.
A directory request was given a -2 error a few times, too. So, it will take
some tweaking, but it's working!
Bravo,
Mark L. Hammond [N8MH]
------------------------------
Message: 10
Date: Sun, 20 Dec 2009 22:05:48 -0500
From: Sebastian <w4as@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: XW-1 QSO and packet attempt
To: AMSAT BB <AMSAT-BB@xxxxx.xxx>
Message-ID: <74040DCF-14AB-4633-BC88-0BF5135E494D@xxxxxxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
I think Drew (KO4MA) and I had the pleasure of completing the first QSO on
the FM repeater of XW-1 tonight from North America. Signals were extremely
strong, yet unfortunately very few stations were heard on the downlink.
Just seconds after Drew and I chatted, we heard/worked Jay (AA4FL), Rick
(WA4NVM) and John (K8YSE). Luc (VE2DWE) has some magic in his antennas, as
I consistently heard him pretty much all through the pass.
I heard Drew mention that perhaps due to the PL tone and the large number of
stations trying to use the repeater, very few stations were able to make a
QSO.
The satellite rose from the south, and since I'm probably the southernmost
USA fixed station active on the birds, I had the opportunity to be in the
right place at the right time I guess.
All in all, XW-1 is a great addition to the ever growing fleet of ham radio
satellites, and I offer my thanks to all the hams in China who made it
possible.
73 de W4AS, EL95
Sebastian
On Dec 20, 2009, at 9:36 PM, Mark L. Hammond wrote:
> I was happy to make a QSO on the FM repeater of XW-1 tonight during the
0210utc 21 Dec 2009 pass, and tried some packet too.
>
> Signals were S9 or better (didn't really look carefully). Audio was loud
and clear on all stations I heard.
>
> I was able to get connected to the BBS, but unable to upload a small file.
A directory request was given a -2 error a few times, too. So, it will
take some tweaking, but it's working!
>
> Bravo,
>
> Mark L. Hammond [N8MH]
------------------------------
Message: 11
Date: Sun, 20 Dec 2009 22:05:33 -0500
From: John Papay <john@xxxxxx.xxx>
Subject: [amsat-bb] XW-1 North America FM 21Dec2009 0205z Audio
To: amsat-bb@xxxxx.xxx
Message-ID: <519891.50740.qm@xxxxxxx.xxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
The XW-1 pass over North America at 0205z was interesting.
When the bird first came up over the horizon, it seemed to be
fairly easy to work through although it was apparent that there
were other signals (probably without tone) that were on the channel.
As the bird went higher (an 86 degree pass for me), it was harder
to get into. It could have been that the BBS stops the voice
repeater but there were times that VE2DWE was making it (although
noisy) and my signal was not there at all. Maybe the amount of
deviation on the tone makes a difference when there are a lot of
competing signals on the input.
As the bird sank low on the horizon on the way north, it was again
possible to get into it. Normally there are not many who get
into any satellite that is in northern Canada. Less congestion on
the input gives you a better chance.
The details of how this bird is designed to handle packet and
voice at the same time may provide an explanation of what we all
experienced. The signal was strong during the entire pass; no
problem hearing it.
The audio recording of this pass can be downloaded at:
http://www.papays.com/XW-1_21Dec2009_020500z.mp3
We look forward to more testing in the FM/BBS mode. Thanks
to everyone who played a role in launching this satellite.
73,
John K8YSE
------------------------------
Message: 12
Date: Sun, 20 Dec 2009 22:37:47 -0500
From: Andrew Glasbrenner <glasbrenner@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: XW-1 QSO and packet attempt
To: Sebastian <w4as@xxxxxxxxx.xxx>
Cc: AMSAT BB <AMSAT-BB@xxxxx.xxx>
Message-ID: <4B2EED8B.1020606@xxxxxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Sebastian wrote:
> I think Drew (KO4MA) and I had the pleasure of completing the first QSO on
the FM repeater of XW-1 tonight from North America. Signals were extremely
strong, yet unfortunately very few stations were heard on the downlink.
>
> Just seconds after Drew and I chatted, we heard/worked Jay (AA4FL), Rick
(WA4NVM) and John (K8YSE). Luc (VE2DWE) has some magic in his antennas, as
I consistently heard him pretty much all through the pass.
>
> I heard Drew mention that perhaps due to the PL tone and the large number
of stations trying to use the repeater, very few stations were able to make
a QSO.
>
>
It was really reminiscent of the first week or so on AO-51. Signals were
great, especially considering the altitude/slant range. However, and no
offense to the designers, the sheer number of folks trying to access the
satellite illustrates the fatal flaw with this sort of PL system. Two or
more signals of nearly the same strength at the same time, and no one
gets through, which leads to some users holding the mike down until they
do. I also wonder how many unattended packet beacons there are out there
on 145.825, with no tone. We might take a listen sometime with AO-51 to
get an idea. What we did with AO-51, although we haven't implemented it
yet for other reasons, is to use the PL decoder output to tell the
flight computer to turn the transmitter on for n minutes, and pass all
audio regardless of tone. This will let us use the PL to conserve power
when no users are there, but mitigates this logjam effect somewhat. This
is where full duplex really becomes worthwhile, to prevent QRMing other
users.
I of course have no idea if the hardware on XW-1, or SO-67 for that
matter, would support this sort of system if reprogrammed, but it would
be nice to see it designed into future spacecraft. This was part of the
lessons learned paper I presented at symposium this year.
After the newness wears off and the crowd thins, the problem won't be so
bad.
Congratulations and thanks again to Alan and the AMSAT-China group for a
fine spacecraft, with a really fine orbit.
73, Drew KO4MA
------------------------------
Message: 13
Date: Sun, 20 Dec 2009 15:23:55 -0500
From: "w3vvp" <w3vvp@xxxxxxxxxx.xxx>
Subject: [amsat-bb] help
To: "amsat-bb" <amsat-bb@xxxxx.xxx>
Message-ID: <CD8827CDE92546C295DD48351CA93502@xxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Trying to load Satpc32 I get the error message as follows:SatIni.SQF oder
ParPort SQF. I can't find any reference in manual to this. Say error with
this file and closing down.Program won't load.Any help appreciated. Thanks.
George
------------------------------
Message: 14
Date: Sun, 20 Dec 2009 16:32:19 -0500
From: Luc Leblanc <lucleblanc6@xxxxxxxxx.xx>
Subject: [amsat-bb] Re: 847 PL problems
To: amsat-bb@xxxxx.xxx
Message-ID: <4B2E5193.868.244CCEF@xxxxxxxxxxx.xxxxxxxxx.xx>
Content-Type: text/plain; charset=US-ASCII
On 20 Dec 2009 at 12:03, Jeff KB2M wrote:
Date sent: Sun, 20 Dec 2009 12:03:10 -0500
From: Jeff KB2M <kb2m@xxxxxxx.xxx>
Subject: [amsat-bb] 847 PL problems
To: amsat-bb@xxxxx.xxx
Before I try a full reset I
> thought I would ask here, to make sure I'm not missing anything stupid...
>
>
> 73 Jeff kb2m
>
>
>
Do you try manually without any cable connected from a tracking interface to
program another tone pressing menu button selecting menu item
12, then selecting any other tone and exiting pressing the menu button
again. This operation should put the FT-847 in any selected tone and
you just have to press the tone button (3) to enable it.
If it's not working you already have the solution that i used about 3 times
since i got my 847 9 years now.
"-"
Luc Leblanc VE2DWE
Skype VE2DWE
www.qsl.net/ve2dwe
DSTAR urcall VE2DWE
WAC BASIC CW PHONE SATELLITE
------------------------------
Message: 15
Date: Sun, 20 Dec 2009 15:25:27 -0800
From: "Art McBride" <kc6uqh@xxx.xxx>
Subject: [amsat-bb] Re: UHF QRM from HAM stations!!
To: "'Glen Zook'" <gzook@xxxxx.xxx>, <amsat-bb@xxxxx.xxx>, "'Luc
Leblanc'" <lucleblanc6@xxxxxxxxx.xx>
Cc: eu-amsat@xxxxxxxxxxx.xxx
Message-ID: <D32E0D52F7904A46885786624D67DA5E@xxxxxx>
Content-Type: text/plain; charset="us-ascii"
In the USA, US Military has priority over all users on the 420-450 MHz band.
Amateur Operators are secondary (cannot cause harmful interference to US
Military.
Under the terms of Part 15 all users under Part 15 must accept harmful
interferences and must no cause harmful interference to other users.
BTW: ISM refers to services that do not intentionally radiate and do not use
radiation for communication purposes. A Microwave is ISM. A WiFi is not.
Art, KC6UQH
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Glen Zook
Sent: Sunday, December 20, 2009 9:20 AM
To: amsat-bb@xxxxx.xxxx Luc Leblanc
Cc: eu-amsat@xxxxxxxxxxx.xxx
Subject: [amsat-bb] Re: UHF QRM from HAM stations!!
I don't think so!
As secondary users, at least in the United States, we even have to "put up"
with all the 47 CFR Part 15 devices on 433 MHz.
Glen, K9STH
Website: http://k9sth.com
--- On Sat, 12/19/09, Luc Leblanc <lucleblanc6@xxxxxxxxx.xx> wrote:
On UHF the band is shared up to a point the "other side" is considering us
as "interference" at least in 2005... Just check slide 9 in the power point
below. Can we also found them as QRM i think not as we are on a secondary
basis :(
www.dtic.mil/ndia/2005rangeops/tuesday/owens.pps
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------------------------------
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End of AMSAT-BB Digest, Vol 4, Issue 673
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