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Discussion in 'DIRECTV General Discussion' started by Sixto, Jul 27, 2008.
Isn't that what they are using (XIPS = Xenon Ion Propulsion System)?
they are supposed to last much longer than regular engines
maybe outlast some of the electronics
Capacity is everything. There are limits of course.
The whole system is weight balanced for power, transponders, and fuel.
Yes it is.
Ladies and Gentlemen
Obviously the knowledge base here is remarkable.
The testing was suppose to begin on 2/13 with the revised filing. Unless I missed the post, no confirmation yet of a signal coming from D12. Does that imply a delay or are there other tests which need to be done prior to testing the Transponders
Just curious as my life is not going to change if D12 goes live a week or even a month late
Thanks in advance
Testing is at 76°, which we can't receive.
We'll rely on any FCC updates or the start of the drift to 103° in Mid-March.
in early testing the signal could pop on and off at random (so to speak) and may be only a carrier signal rather than something intelligent.
it takes 3 to 5 days before we see anything definate
Thanks for the reply
I will wait with eager anticipation
OK, here's a question for the rocket scientists here... how much does the apogee have to be raised on a GSO satellite in order to drift it from 76° to 103° in 20 days, ignoring (or not) that in reality it might be slowly raised and then slowly lowered at the beginning and end of it's 27° trip.
I thought sure either you or LL or P Smith would be camped out at the D* testing facilities, all dressed in black with your blacked out dish and an oscilloscope dialing in the data. Sort of like Whistler from the movie Sneakers.
Good idea, but I don't have spare AU-9 for the camping tour with spectrum analyzer. Imagine, sitting on a beach, do setup the 1m dish and SA ( it is portable, should lasts a couple hours), dialing to 76W and waiting days and nights when some weird spike signal start appearing then drifting to the left and right side of screen ( I recall that was during test of previous D10 or D11)...
It will be only a CW carrier signal for IOT at 76° as the STA allows for no other emission during the testing phase.
DirecTV intends to plot the "gain-transfer" characteristics with an unmodulated carrier wave for each transponder at three points. The center or mid-frequency and upper and lower edges of all the transponders' frequency response curves.
we should define CW as some people see CW and thing CBS - Warner Bros. I think you mean Clock Wise?
I bet they also will test all the transponders spot, national, and spares.
No I mean CW as in "continuous wave."
Perhaps I shouldn't have capitalized the letters earlier ...
No problem, we educate the masses, and make they appreciate all that Directv has to do to get more HD channels.
I don't see how that would be any more ridiculous than a couple dozen of us following (for 6 months and 3000 posts) a thread about a satellite being put into service.
As in all through the Holidays, and even more "pathetic" there are a whole lot of us viewing this thread right now, for a reason I can't quite define!
I'm at work, and bored stiff, this is better than folding paper.
AKA "unmodulated carrier", in case some hams interpret CW as Morse code transmissions.