[amsat-bb] Re: The Mode B tradition, was Re: The Eagle has died.

[John B. Stephensen]

All phase 3 satellites have had computers onboard the so this is not a new 
issue. AMSAT-NA tests processors that it uses by irradiating them to prove 
that they will be reliable in orbit. Also, a series of components connected 
on a semiconductor die is much more reliable than a series of components 
connected on a PCB.

73,

John
KD6OZH

----- Original Message ----- 
From: <G0MRF at aol.com>
To: <brobertson at mta.ca>; <amsat-bb at amsat.org>
Sent: Thursday, September 14, 2006 21:04 UTC
Subject: [amsat-bb] Re: The Mode B tradition, was Re: The Eagle has died.


>
> In a message dated 14/09/2006 15:56:15 GMT Standard Time, broberts at mta.ca
> writes:
>
>> 73"  de
>>
>> i8CVS Domenico
>
> Happily, two of the three birds you  mention above, AO-7 and VO-52, are in
> exactly the mode that analog Eagle  users will be using, U/V. As I
> understand it, the plan is to have this link  working 24/7. (Yes it will
> primarily use a software-driven transponder, but  that will be transparent
> to the analog user.) In this regard, I can't see  how the design
> team can be accused of unnecessarily innovating.
>
> 73,  Bruce
> VE9QRP
>
>
>
> Hello Bruce / Dom.
>
> I agree, the UV on Eagle will be apparently analog (ue) to the casual 
> user.
>
> But be aware Bruce that it's not "primarily" a software driven 
> transponder.
>
> It is in fact TOTALLY software driven.  There is no linear IF, just  DSP 
> in
> the core.  Or from another viewpoint  100,000 single point  failures just
> waiting to happen.
>
> 73
>
> David  G0MRF
> _______________________________________________
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