[eagle] Re: Eagle 10 MHz Clock

Lyle Johnson kk7p at wavecable.com
Wed Apr 11 13:05:41 PDT 2007


Hello Lou!

> It was my understanding that we were going to use Mirek's L band 
> receiver for the command receiver.
> It has an excellent track record and is available.

No problem. I was referring to the comment about AO-51.  I didn't mean 
to muddy the waters.

73,

Lyle KK7P

> 
> Lou McFadin
> W5DID
> w5did at mac.com
> 
> 
> On Apr 11, 2007, at 2:04 PM, Lyle Johnson wrote:
> 
>> Hello Bill!
>>
>>> I agree with you fully about the frequency agility issue. If it's not
>>> needed for a mission function, then it could be more of headache than a
>>> feature. But then some of the receivers on AO-51 are agile and I'm not
>>> aware of any issues.
>>
>> AO-51 has 4 crystal-controlled (i.e., not using PLL synthesizer in the
>> L.O.) receivers, and one frequency-agile receiver.  The frequency agile
>> receiver was a mission requirement.
>>
>> All of the receivers can be used for command operation, but the
>> frequency agile one is so wired because it was "free" - no mass or
>> complexity penalty.  That is because the flight computer has 6
>> demodulators built in, and a total of five receivers on the spacecraft.
>>   It is not intended for use in an emergency recovery scenario.
>>
>> 73,
>>
>> Lyle KK7P
>>
>> _______________________________________________
>> Via the Eagle mailing list courtesy of AMSAT-NA
>> Eagle at amsat.org
>> http://amsat.org/mailman/listinfo/eagle
> 
> 




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