[amsat-bb] Re: AMSAT Fox News

Trevor . m5aka at yahoo.co.uk
Thu Mar 3 15:09:18 PST 2011

Hi Tony, 

That's great news. 

Are you able to say what the power budget overhead is in having an SDX transponder? The most efficient SDX I'd heard of still consumed some 310mw more than an analog linear transponder which for a conventional 1U CubeSat is 310mw too many. 

SDX on a CubeSat with deployable solar panels paves the way to using far higher speed telemetry downlinks than we currently achieve in a 20kHz B/W.

73 Trevor M5AKA 

--- On Thu, 3/3/11, Anthony Monteiro <aa2tx at comcast.net> wrote:

> From: Anthony Monteiro <aa2tx at comcast.net>
> Subject: Re: [amsat-bb] Re: AMSAT Fox News
> To: m5aka at yahoo.co.uk, amsat-bb at amsat.org
> Date: Thursday, 3 March, 2011, 0:51
> Hi Trevor,
> The AMSAT Fox CubeSat bus will include both an analog FM
> transponder and a software defined transponder (SDX.) For
> the
> Fox mission, we intend to program the SDX for high
> performance
> digital modes for our command and telemetry channels but
> the
> SDX could be programmed for almost anything including a
> linear
> or packet transponder on a follow up mission.
> 73,
> Tony AA2TX
> AMSAT VP Engineering
> ---
> At 06:01 PM 3/2/2011, Trevor . wrote:
> >Under the section "AMSAT-Fox planned features include"
> >
> >It says
> >
> >"AMSAT's flexible, CubeSat compatible software defined
> transponder 
> >is a new approach providing a robust and reliable radio
> link for 
> >future CubeSats allowing university teams to
> concentrate on their 
> >scientific objectives."
> >
> >Now although listed under "AMSAT-Fox planned features"
> that bullet 
> >point doesn't have the key word Fox in it.
> >
> >Can someone clarify if the FM transponder on Fox will
> be SDX or if 
> >that's an aspiration for later CubeSats ?
> >
> >73 Trevor M5AKA


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