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CX2SA > SATDIG 23.06.09 01:34l 712 Lines 23017 Bytes #999 (0) @ WW
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To : SATDIG@WW
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Today's Topics:
1. Fwd: [PNWVHFS] LRO (w7lrd@xxxxxxx.xxxx
2. Re: G-5500 rotor motor intermittent (Sebastian)
3. Phase shift keying question (Grant Hodgson)
4. AO-51 Off U/S (Luc Leblanc)
5. Re: AO-51 Off U/S (David - KG4ZLB)
6. AO-51 adjustments (Gould Smith)
7. Re: AO-51 Off U/S (n3tl@xxxxxxxxx.xxxx
8. Re: AO-51 Off U/S (Rick - WA4NVM)
9. Re: AO-51 adjustments (n3tl@xxxxxxxxx.xxxx
10. Re: AO-51 adjustments (Andrew Glasbrenner)
11. Re: AO-51 adjustments (n3tl@xxxxxxxxx.xxxx
12. AO-7 over Brasil (Roland Zurmely)
----------------------------------------------------------------------
Message: 1
Date: Mon, 22 Jun 2009 01:43:10 +0000 (UTC)
From: w7lrd@xxxxxxx.xxx
Subject: [amsat-bb] Fwd: [PNWVHFS] LRO
To: AMSAT-bb@xxxxx.xxx
Message-ID:
<1885660489.6595781245634990729.JavaMail.root@xxxxxxx.xxxxxxxxxx.xx.xxxx
.xxxxxxx.xxx>
Content-Type: text/plain; charset=utf-8
Hello
I am fowarding this to the AMSAT-BB.? I am sure it will be of interest to some
of us.? I asked Loren what down converter he is using, DSP software etc.? If
any of you have any information as to how to do this I would like to know.? I
do not think the transystem 3731aa DC will work down to 2271.
73 Bob W7LRD
----- Forwarded Message -----
From: "Loren Moline WA7SKT" <lmoline@xxxxxxx.xxx>
To: pnwvhfs@xxxxxxxxxxxx.xxx
Sent: Saturday, June 20, 2009 6:29:10 PM GMT -08:00 US/Canada Pacific
Subject: [PNWVHFS] LRO
Hello.
For those who have S-Band receive capability the Lunar Recon. Orbiter can be
heard at 2271.190Mhz+/- doppler.
It is a carrier and best found with a DSP audio spectrum program or an SDR.
I found the signal to be in excess of 10db over the noise with a 80cm offset
feed dish and LNA.
I found it slightly below and behind the path of the sun today. It is about
1/2 way to the moon.
?
Loren?? WA7SKT
?
Member: ARRL and Pacific Northwest VHF Society
Member: Hearsat Satellite Monitoring Group
Location: CN86cx
??????????????????????????????????????????????????????????????????????????????
????????
??????????????????????????
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To post to this group, send email to PNWVHFS@xxxxxxxxxxxx.xxx
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------------------------------
Message: 2
Date: Sun, 21 Jun 2009 22:48:18 -0400
From: Sebastian <w4as@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: G-5500 rotor motor intermittent
To: AMSAT BB <AMSAT-BB@xxxxx.xxx>
Message-ID: <51C49081-7B75-448B-BA80-7DB2C858749F@xxxxxxxxx.xxx>
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
Michael, you have received a lot of information about troubleshooting
the rotor on this reflector.
However, if you are not able to repair it, I just wanted to let you
know (in case you didn't see my post a few days ago), that contrary to
popular belief, Yaesu still fixes their rotors, specifically both the
G-5400/5500.
I had a bad azimuth rotor, and I shipped it to them. I believe they
charge a $35 estimate fee. If you decide to fix it, the fee is waived.
My rotor cost me just a little over $100 and was very securely shipped
to me. I received a post card when it was received, and a phone call
telling me what the total would be; once I gave the ok, I had it back
in my hands in one week, and it's up and running again.
Of course, if you are able to troubleshoot it, you will be learning
more than I did, but I admit that at this point in life, I would
rather have someone who knows what they are doing fix it, and $100 in
today's world isn't a lot of money.
73 de W4AS
Sebastian
On Jun 20, 2009, at 8:54 PM, Michael Hatzakis Jr MD wrote:
> Ok, sorry for the additional post, this is a follow up. After my
> debugging
> session today, I am fast-forwarding to what I expect will be the
> ending to
> this little fairy tail, that is, I see me climbing up and pulling
> down this
> damn rotor to either replace or repair.
>
> So, next natural question is, if I am going to repair, what should I
> repair
> while I have it open or are there people who do a good job in
> rebuilding
> Yaesu rotors, roughly 5 years old??
>
> Michael K3MH
------------------------------
Message: 3
Date: Mon, 22 Jun 2009 14:05:43 +0100
From: "Grant Hodgson" <grant@xxxxxxxxxxxxx.xx.xx>
Subject: [amsat-bb] Phase shift keying question
To: amsat-bb@xxxxx.xxx
Message-ID: <20090622124250.M53307@xxxxxxxxxxxxx.xx.xx>
Content-Type: text/plain; charset=iso-8859-1
Andy
I/Q modulators don't work that way, no free lunch and all that. In newbie
terms, an I/Q modulator can be thought of as a special mixer that can
modulate a carrier signal with an arbitrary modulation format - i.e. any type
of modulation you want - literally.
An I/Q modulator has a Local Oscillator input (carrier), an I input and a Q
input, and an RF output. The modulation signal (FM, CW, AM, SSB, FSK, PSK or
whatever) is applied to both the I and Q inputs, which in turn modulate the
LO signal to produce the output signal.
The type of modulation is determined by the phase relationship between the I
and Q inputs. Couple of simple examples - lets say the modulation signal is
a 1kHz sine wave, and we have an LO signal of 144.100MHz. If both I and Q
inputs are fed with this signal - in phase - then the output of the I/Q
modulator will be AM, at 144.100MHz, modulated at 1kHz - you will hear a 1kHz
tone on an AM receiver.
If the I and Q inputs are fed 90 degrees out of phase with the same 1kHz
tone, then the output of the modulator will be either LSB or USB depending on
whether the I signal leads or lags the Q signal. If the receiver is set to
144.100 kHz you will hear a 1kHz tone when set to the appropriate sideband.
With slightly more complex phase relationships between the I and Q signals it
is possible to generate any type of modulation you want, and from a
receiver's point of view you will not know how the modulation was generated.
But you can't feed different modulation channels into the I and Q inputs -
the output would be a complex mixture of the two which would be un-
decipharable.
You could try Googling 'IQ modulation' for more information, although some of
the explanations are aimed at professional engineers with good maths skills.
HTH
Grant G8UBN
Could anyone please explain, in newbie terms, if it is possible to split a
telemetry data stream from a satellite OBC into two data streams, sent
simultaneously on two nbfm channels, each PSK with the phase difference
between
them?
I have in mind a conversation which I don't fully understand, about these
being
the I and Q components, and this offering a doubling of the data rate
compared
with using one nbfm channel.
Grateful for any pointers on or off the -bb
many thanks
andy G0SFJ
------------------------------
Message: 4
Date: Mon, 22 Jun 2009 09:17:42 -0400
From: Luc Leblanc <lucleblanc6@xxxxxxxxx.xx>
Subject: [amsat-bb] AO-51 Off U/S
To: amsat-bb@xxxxx.xxx
Message-ID: <4A3F4C36.2940.4A5A1E@xxxxxxxxxxx.xxxxxxxxx.xx>
Content-Type: text/plain; charset=US-ASCII
On the 1300Z pass over FN36 there was no signal on 435.300mhz but the data
channel 435.150mhz was on!
"-"
Luc Leblanc VE2DWE
Skype VE2DWE
www.qsl.net/ve2dwe
WAC BASIC CW PHONE SATELLITE
------------------------------
Message: 5
Date: Mon, 22 Jun 2009 10:25:41 -0400
From: David - KG4ZLB <kg4zlb@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: AO-51 Off U/S
To: amsat-bb@xxxxx.xxx
Message-ID: <4A3F9465.4080906@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
According to the website, 435.150 is currently the downlink for 1.2
uplink on the B side (Mode L/U) - I had a great 80 degree pass last
evening which was showing great promise as the bird approached but I
assume that it was terminated for telemetry collection reasons!
--
David
KG4ZLB
www.kg4zlb.com
Luc Leblanc wrote:
> On the 1300Z pass over FN36 there was no signal on 435.300mhz but the data
channel 435.150mhz was on!
>
>
> "-"
>
>
> Luc Leblanc VE2DWE
> Skype VE2DWE
> www.qsl.net/ve2dwe
> WAC BASIC CW PHONE SATELLITE
>
>
>
> _______________________________________________
> 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: 6
Date: Mon, 22 Jun 2009 10:34:17 -0400
From: "Gould Smith" <gouldsmi@xxxxxxxxx.xxx>
Subject: [amsat-bb] AO-51 adjustments
To: <amsat-bb@xxxxx.xxx>
Message-ID: <3F26A7986C824AAEA6A38D9CE101067C@xxxxxxxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
I am working with the satellite to get the Field Day configuration operational
long term.. I turned TXB back on during the 1300Z pass.
During this pass I adjusted the TX levels to TXA 240 mW and TXB 290 mW.
These are lower power levels than I have ever used before, but necessary to
get the satellite through the 16+ minute eclipses each orbit. The SQRX
receiver uses about 110 mA that must be subtracted from the total TX power
used.
I think I am close and expect to get the correct settings over the next 24
hours. It is also necessary to change the L/U analog operation to digital over
the eastern US in order to download the telemetry to see how the satellite is
performing over multiple orbits.
73,
Gould, WA4SXM
AO-51 Command Station
------------------------------
Message: 7
Date: Mon, 22 Jun 2009 14:37:18 +0000
From: n3tl@xxxxxxxxx.xxx
Subject: [amsat-bb] Re: AO-51 Off U/S
To: kg4zlb@xxxxx.xxxx amsat-bb@xxxxx.xxx
Cc: David - KG4ZLB <kg4zlb@xxxxxxxxxx.xxx>
Message-ID:
<062220091437.5828.4A3F971E00069F4C000016C422218683269B0A02D2089B9A019C0
4040A0DBF049BCC02@xxx.xxx>
Content-Type: text/plain
I didn't hear either pass this morning. The first one was 38 degrees to the
east, the second was 18 degrees to the west.
However ... I know of at least one operator who did hear stations on both
passes this morning (i.e., 11:25-ish UTC and 13:05-ish UTC) on the 435.300
downlink, and worked some on the first pass. I telephoned him when I didn't
hear anything on the first pass, then used the second to troubleshoot
potential problems here. When I didn't hear anything by mid-pass (and even at
18 degrees, I routinely hear any of the satellites clearly here), I switched
to AO-7 and copied stations in SSB. I tried that with and without my duplexer,
and copied both ways.
So, it appears as though AO-51 is working, but may not have the transmit power
just now we're all used to.
73 to all,
Tim - N3TL
-------------- Original message from David - KG4ZLB <kg4zlb@xxxxxxxxxx.xxx>: -
-------------
> According to the website, 435.150 is currently the downlink for 1.2
> uplink on the B side (Mode L/U) - I had a great 80 degree pass last
> evening which was showing great promise as the bird approached but I
> assume that it was terminated for telemetry collection reasons!
>
> --
> David
> KG4ZLB
> www.kg4zlb.com
>
>
>
> Luc Leblanc wrote: > On the 1300Z pass over FN36 there was no signal on
435.300mhz but the data
> channel 435.150mhz was on!
> >
> >
> > "-"
> >
> >
> > Luc Leblanc VE2DWE
> > Skype VE2DWE
> > www.qsl.net/ve2dwe
> > WAC BASIC CW PHONE SATELLITE
> >
> >
> >
> > _______________________________________________
> > 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: 8
Date: Mon, 22 Jun 2009 09:38:47 -0500
From: "Rick - WA4NVM" <wa4nvm@xxxxxxx.xxx>
Subject: [amsat-bb] Re: AO-51 Off U/S
To: "Luc Leblanc" <lucleblanc6@xxxxxxxxx.xx>, <amsat-bb@xxxxx.xxx>
Message-ID: <DA169642D55743998E08AECB89E41A3C@xxxxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Luc and All,
I finally started hearing that pass about 1310 utc in Memphis. Leo was
talking to someone,
but very weak audio and downlink signal. Maybe power cut back with both
modes on?
Rick - WA4NVM
>
>
> On the 1300Z pass over FN36 there was no signal on 435.300mhz but the data
> channel 435.150mhz was on!
>
>
> "-"
>
>
> Luc Leblanc VE2DWE
> Skype VE2DWE
> www.qsl.net/ve2dwe
> WAC BASIC CW PHONE SATELLITE
>
>
>
> _______________________________________________
> 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: 9
Date: Mon, 22 Jun 2009 14:40:00 +0000
From: n3tl@xxxxxxxxx.xxx
Subject: [amsat-bb] Re: AO-51 adjustments
To: "Gould Smith" <gouldsmi@xxxxxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID:
<062220091440.11279.4A3F97BF000E52EC00002C0F22218683269B0A02D2089B9A019C
04040A0DBF049BCC02@xxx.xxx>
Content-Type: text/plain
Thanks for the information Gould.
Will you clarify, please, that TXA is the normal U/V configuration - and also
that these are the power levels we can expect for Field Day? That's what I
understand from your comments.
Thank you, and thanks for all your efforts to keep AO-51 functioning as best
as it can given the issues you have to address.
73 to all,
Tim - N3TL
-------------- Original message from "Gould Smith" <gouldsmi@xxxxxxxxx.xxx>: -
-------------
I am working with the satellite to get the Field Day configuration operational
> long term.. I turned TXB back on during the 1300Z pass.
> During this pass I adjusted the TX levels to TXA 240 mW and TXB 290 mW.
These are lower power levels than I have ever used before, but necessary to
get the satellite through the 16+ minute eclipses each orbit. The SQRX
receiver uses
> about 110 mA that must be subtracted from the total TX power used.
> I think I am close and expect to get the correct settings over the next 24
hours. It is also necessary to change the L/U analog operation to digital over
the eastern US in order to download the telemetry to see how the satellite is
> performing over multiple orbits.
>
> 73,
> Gould, WA4SXM
> AO-51 Command Station
> _______________________________________________
> 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: 10
Date: Mon, 22 Jun 2009 10:44:44 -0400
From: "Andrew Glasbrenner" <glasbrenner@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: AO-51 adjustments
To: <n3tl@xxxxxxxxx.xxx>, "Gould Smith" <gouldsmi@xxxxxxxxx.xxx>,
<amsat-bb@xxxxx.xxx>
Message-ID: <99ADBE07256D4369825CA9C6712E5896@xxxxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
TXa refers to the 435.150 downlink, and TXb to 435.300, regardless of the
uplink or configuration. The power levels should be roughly the same for
Field Day.
73, Drew KO4MA
----- Original Message -----
From: <n3tl@xxxxxxxxx.xxx>
To: "Gould Smith" <gouldsmi@xxxxxxxxx.xxx>; <amsat-bb@xxxxx.xxx>
Sent: Monday, June 22, 2009 10:40 AM
Subject: [amsat-bb] Re: AO-51 adjustments
> Thanks for the information Gould.
>
> Will you clarify, please, that TXA is the normal U/V configuration - and
> also that these are the power levels we can expect for Field Day? That's
> what I understand from your comments.
>
> Thank you, and thanks for all your efforts to keep AO-51 functioning as
> best as it can given the issues you have to address.
>
> 73 to all,
>
> Tim - N3TL
> -------------- Original message from "Gould Smith"
> <gouldsmi@xxxxxxxxx.xxx>: --------------
>
> I am working with the satellite to get the Field Day configuration
> operational
>> long term.. I turned TXB back on during the 1300Z pass.
>> During this pass I adjusted the TX levels to TXA 240 mW and TXB 290 mW.
>> These are lower power levels than I have ever used before, but necessary
>> to get the satellite through the 16+ minute eclipses each orbit. The SQRX
>> receiver uses
>> about 110 mA that must be subtracted from the total TX power used.
>> I think I am close and expect to get the correct settings over the next
>> 24 hours. It is also necessary to change the L/U analog operation to
>> digital over the eastern US in order to download the telemetry to see how
>> the satellite is
>> performing over multiple orbits.
>>
>> 73,
>> Gould, WA4SXM
>> AO-51 Command Station
>> _______________________________________________
>> 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: 11
Date: Mon, 22 Jun 2009 15:30:35 +0000
From: n3tl@xxxxxxxxx.xxx
Subject: [amsat-bb] Re: AO-51 adjustments
To: "Andrew Glasbrenner" <glasbrenner@xxxxxxxxxx.xxx>, "Gould Smith"
<gouldsmi@xxxxxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID:
<062220091530.6237.4A3FA39B00053C140000185D22230647029B0A02D2089B9A019C0
4040A0DBF049BCC02@xxx.xxx>
Content-Type: text/plain
Thanks for this Drew. I have just seen that designation on the AO-51
information page (the one linked to the status page on the AMSAT site) for the
first time, although I've made countless visits to that page over the past
year.
For those who will operating Field Day from remote/portable sites and using
antennas like the Elk or Arrow, you may wish to check out this PDF, which I
found on the Cushcraft Web site:
http://www.cushcraft.com/comm/support/pdf/Antenna-Polarization-14B32.pdf
After reading it, I believe that AO-51 could prove to be more challenging to
work than usual this weekend, given a TX output in the SO-50 neighborhood and
the antenna mismatch many of us will be dealing with (i.e., linear polarized
antenna at the ground station vs. circularly polarized at the satellite).
If I misread the document and have drawn inaccurate conclusions, I hope
someone will post a correction. However, it seems to me like this provides all
the more reason for us to focus on AO-7, FO-29 and VO-52 if we can.
Thanks to all,
Tim - N3TL
-------------- Original message from "Andrew Glasbrenner"
<glasbrenner@xxxxxxxxxx.xxx>: --------------
> TXa refers to the 435.150 downlink, and TXb to 435.300, regardless of the
> uplink or configuration. The power levels should be roughly the same for
> Field Day.
>
> 73, Drew KO4MA
>
> ----- Original Message -----
> From:
> To: "Gould Smith" ;
> Sent: Monday, June 22, 2009 10:40 AM
> Subject: [amsat-bb] Re: AO-51 adjustments
>
>
> > Thanks for the information Gould.
> >
> > Will you clarify, please, that TXA is the normal U/V configuration - and
> > also that these are the power levels we can expect for Field Day? That's
> > what I understand from your comments.
> >
> > Thank you, and thanks for all your efforts to keep AO-51 functioning as
> > best as it can given the issues you have to address.
> >
> > 73 to all,
> >
> > Tim - N3TL
> > -------------- Original message from "Gould Smith"
> > : --------------
> >
> > I am working with the satellite to get the Field Day configuration
> > operational
> >> long term.. I turned TXB back on during the 1300Z pass.
> >> During this pass I adjusted the TX levels to TXA 240 mW and TXB 290 mW.
> >> These are lower power levels than I have ever used before, but necessary
> >> to get the satellite through the 16+ minute eclipses each orbit. The SQRX
> >> receiver uses
> >> about 110 mA that must be subtracted from the total TX power used.
> >> I think I am close and expect to get the correct settings over the next
> >> 24 hours. It is also necessary to change the L/U analog operation to
> >> digital over the eastern US in order to download the telemetry to see how
> >> the satellite is
> >> performing over multiple orbits.
> >>
> >> 73,
> >> Gould, WA4SXM
> >> AO-51 Command Station
> >> _______________________________________________
> >> 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
>
> _______________________________________________
> 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: Mon, 22 Jun 2009 09:25:42 -0700 (PDT)
From: Roland Zurmely <py4zbz@xxxxx.xxx>
Subject: [amsat-bb] AO-7 over Brasil
To: amsat-bb@xxxxx.xxx
Message-ID: <505951.89293.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
During the last week, all the AO-7 morning passes over Brasil
are not good: very weak and distorted signal.
But all the evening passes are OK: very good signal.
What?s hapening ?
?
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 4, Issue 290
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