[eagle] Re: Eagle 10 MHz Clock
kk7p at wavecable.com
Wed Apr 11 11:04:26 PDT 2007
> 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.
More information about the Eagle