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@comcast.net wrote:
From: Anthony Monteiro aa2tx@comcast.net Subject: Re: [amsat-bb] Re: AMSAT Fox News To: m5aka@yahoo.co.uk, amsat-bb@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