[hpsdr] Crystal Oscillator for AD9912

[richardh at iinet.net.au]

Thanks Chris
What package/footprint are these crystals usually available in?
Alternatively, what is the best package to specify?

Richard

On Tue Apr  8  8:10 , Chris Bartram  sent:

>Hello Richard
>
>As I think you know, I've been working on a very low noise, 10MHz lockable, 
>1GHz clock for the AD9912 on behalf of the uWSDR group. To do it really well 
>is surprisingly non-trivial. The design will also have implications for other 
>amateur microwave applications.
>
>My suggestion is that, even if you choose to use a packaged oscillator or a 
>discrete crystal, you make the 1GHz input accessible via an SMA connector so 
>that using an external clock module is reasonably easy!
>
>As to cost, it's still difficult to give an estimate, particularly as good 
>crystals can cost a lot of money. With a good, but not exceptional VHF 
>crystal, ordered in 100s I guess that USD30 - USD50 would cover BOM cost of 
>my design.
>
>I hope to be able to post the very low noise VHF oscillator design (uWSDR 
>project DISTAW) which forms the heart of the on the uWSDR web site in the not 
>too distant future. I'll announce it on the hpsdr list when I do.
>
>Vy 73
>
>Chris
>GW4DGU
>)


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