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CX2SA > SATDIG 30.12.13 21:02l 282 Lines 8176 Bytes #999 (0) @ WW
BID : AMSATBB8477
Read: GUEST
Subj: AMSAT-BB-digest V8 477
Path: IZ3LSV<IK2XDE<DB0RES<DB0ANF<CX2SA
Sent: 131230/2002Z @:CX2SA.SAL.URY.SA #:2090 [Salto] FBB7.00e $:AMSATBB8477
From: CX2SA@CX2SA.SAL.URY.SA
To : SATDIG@WW
Today's Topics:
1. MCube-2 (PA3GUO)
2. Re: Funcube-1 is +10 kHz on the uplink? (Wouter Weggelaar)
3. Re: Funcube-1 is +10 kHz on the uplink? (PA3GUO)
4. Funcube Handbook Spanish (Espanol) (richard limebear)
5. Thanks to K4FEG (wa4hfn@xxxxxxx.xxxx
6. Re: Thanks to K4FEG (gkcarr@xxxxxxxxxx.xxxx
----------------------------------------------------------------------
Message: 1
Date: Sun, 29 Dec 2013 22:28:43 +0100
From: "PA3GUO" <pa3guo@xxxxxxx.xx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] MCube-2
Message-ID: <005601cf04dc$f388d1a0$da9a74e0$@xxxxxxx.xx>
Content-Type: text/plain; charset="us-ascii"
For those trying to capture the Mcube-2 telemetry, it surely is a lot of fun
downloading the 9k6 data at 70cm! The SW that the project team provides is
really easy to use and looks nice. Cool demo for your friends when you want
to show-case your involvement in Cubesats.
With my modest set/up I can decode when the satellite is >20 degrees
elevation.
A note on the downlink frequency: the published frequency is 437.485MHz, but
I have better results a few kHz lower: 437.480MHz.
Success!
Henk, PA3GUO
------------------------------
Message: 2
Date: Sun, 29 Dec 2013 22:53:11 +0100
From: Wouter Weggelaar <wouterweg@xxxxx.xxx>
To: PA3GUO <pa3guo@xxxxxxx.xx>
Cc: AMSAT-BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Funcube-1 is +10 kHz on the uplink?
Message-ID:
<CAKXf1rGMu6HU_hgyewfgS3EEjUxRXm=5-GcUwrHLukPMYRTmQA@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Hi Henk,
What you are seeing is the combined effect of various oscillators drifting
over temperature and some static offsets present.
It is not so easy to have these offsets quantified as static numbers.
The oscillators were designed to be extremely low power, and temperature
compensation is therefore limited. we do not have the power on board for
PLL based frequency generation. With the current state of the art, this is
possible, but not when the circuit was designed.
The power budget of a one Unit CubeSat is challenging, and FUNcube is the
first 1U CubeSat to include a linear transponder.
At the moment we are nice and power positive, but the system was designed
with the degradation of the battery and solar arrays in mind.
So in the end, I am afraid you will have to guesstimate based on
temperature.
Wouter PA3WEG
FUNcube transponder designer
On Fri, Dec 27, 2013 at 10:05 PM, PA3GUO <pa3guo@xxxxxxx.xx> wrote:
> Just wondered if I saw this observed/reported already:
>
> When for the Funcube-1 transponder using:
> 435.140 MHz uplink (LSB)
> 145.960 MHz downlink (USB)
> I still need to add another 10kHz on the uplink (making it 435.150 MHz).
>
> Can anyone else confirm (or counter :-)) this ?
>
> Henk, PA3GUO
> The Netherlands
>
>
>
>
>
> _______________________________________________
> 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: 3
Date: Sun, 29 Dec 2013 23:28:20 +0100
From: "PA3GUO" <pa3guo@xxxxxxx.xx>
To: "'Wouter Weggelaar'" <wouterweg@xxxxx.xxx>
Cc: 'AMSAT-BB' <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Funcube-1 is +10 kHz on the uplink?
Message-ID: <006601cf04e5$48304aa0$d890dfe0$@xxxxxxx.xx>
Content-Type: text/plain; charset="us-ascii"
Thanks for the explaination Wouter. It sure is a fantastic transponder!
Henk, PA3GUO
ps: indeed as stated everywhere: 5W uplink is more than enough for a strong
downlink.
Van: Wouter Weggelaar [mailto:wouterweg@xxxxx.xxxx
Verzonden: zondag 29 december 2013 22:53
Aan: PA3GUO
CC: AMSAT-BB
Onderwerp: Re: [amsat-bb] Funcube-1 is +10 kHz on the uplink?
Hi Henk,
What you are seeing is the combined effect of various oscillators drifting
over temperature and some static offsets present.
It is not so easy to have these offsets quantified as static numbers.
The oscillators were designed to be extremely low power, and temperature
compensation is therefore limited. we do not have the power on board for PLL
based frequency generation. With the current state of the art, this is
possible, but not when the circuit was designed.
The power budget of a one Unit CubeSat is challenging, and FUNcube is the
first 1U CubeSat to include a linear transponder.
At the moment we are nice and power positive, but the system was designed
with the degradation of the battery and solar arrays in mind.
So in the end, I am afraid you will have to guesstimate based on
temperature.
Wouter PA3WEG
FUNcube transponder designer
On Fri, Dec 27, 2013 at 10:05 PM, PA3GUO <pa3guo@xxxxxxx.xx> wrote:
Just wondered if I saw this observed/reported already:
When for the Funcube-1 transponder using:
435.140 MHz uplink (LSB)
145.960 MHz downlink (USB)
I still need to add another 10kHz on the uplink (making it 435.150 MHz).
Can anyone else confirm (or counter :-)) this ?
Henk, PA3GUO
The Netherlands
_______________________________________________
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: Mon, 30 Dec 2013 14:18:32 +0000
From: richard limebear <richard@xxxxx.xxxxx.xx.xx>
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Funcube Handbook Spanish (Espanol)
Message-ID:
<E60DD5761D7C86409D61841C871CFE4C0299E376@xxxxxxx.xxxx.xxxx>
Content-Type: text/plain; charset="us-ascii"
Gang
The latest translation of the Funcube Handbook is into Spanish and is now
available at <http://funcube.org.uk/working-documents/funcube-handbook/> and
some other websites. Offers for other translations would be welcome.
73
Richard G3RWL
------------------------------
Message: 5
Date: Mon, 30 Dec 2013 15:25:45 +0000 (UTC)
From: wa4hfn@xxxxxxx.xxx
To: AMSAT <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Thanks to K4FEG
Message-ID:
<1117584905.404453.1388417145135.JavaMail.root@xxxxxxx.xxxxxxxxxxx.xx.xxxx.xxx
xxxx.xxx>
Content-Type: text/plain; charset=utf-8
The Star Comm Group of Memphis, TN would like to Thank K4FEG Frank Griffin
for the outstanding job he has been doing on the Grid Gorillas email BB .
Informing everyone of the grids that are being activated. This service has
helped us all to increase our grid count. There are lots of rare grids out
there and This service has been a valualable tool.
THANKS FRANK good job
Star Comm Group
Damon
------------------------------
Message: 6
Date: Mon, 30 Dec 2013 10:55:09 -0600 (CST)
From: gkcarr@xxxxxxxxxx.xxx
To: wa4hfn@xxxxxxx.xxx
Cc: AMSAT <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Thanks to K4FEG
Message-ID: <1388422509.158611318@xxxxxxx.xxxxxxxxx.xx>
Content-Type: text/plain; charset="UTF-8"
I totally agree!
George
WA5KBH
-----Original Message-----
From: wa4hfn@xxxxxxx.xxx
Sent: Monday, December 30, 2013 09:25
To: "AMSAT" <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Thanks to K4FEG
The Star Comm Group of Memphis, TN would like to Thank K4FEG Frank Griffin
for the outstanding job he has been doing on the Grid Gorillas email BB .
Informing everyone of the grids that are being activated. This service has
helped us all to increase our grid count. There are lots of rare grids out
there and This service has been a valualable tool.
THANKS FRANK good job
Star Comm Group
Damon
_______________________________________________
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 member? Join now to support the amateur satellite program!
http://amsat.org/mailman/listinfo/amsat-bb
End of AMSAT-BB Digest, Vol 8, Issue 477
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