[hpsdr] Penelope Schematic Updated

[Lyle Johnson]

Hello Eric!

> Gosh do these schematics turn me on! I printem on 11.5 x 17 at work, go to
> my truck at lunch to get away from the phone and computer screen and try to
> figgre em out! (smile). I have a couple of dummy questions.
> 
> Are there part numbers for U30, 33 and 37?

I believe there is for the 125 MHz VCXO.  The 10 MHz are uncertain, and 
there are lots of choices.

> With respect to U37 10 MHz Alt
> how does that differ from U33 10 mhz? 

It is just a way to allow two different oscillator footprints on the 
same PCB.  Only one of the oscillators will be installed, not both.  I 
will put a note on the schematic to this effect.

> What do LEDs 0-9 do? (PLL Lock) What do they connect to?

As the account said when asked about the financial statement, "What do 
you want it mean?"

Eight of the LEDs attach to the FPGA so they can be programmed.  One of 
them is just attached to power and is on all the time.

> Are all of these LPF's REALLY going on this board?

Yes!  In fact, you can see them here!

< URL:http://www.hamsdr.com/personaldirectory.aspx?id=533 >

This is the 160mm board size. I just couldn't stuff everything onto a 
120mm board, or at least I was unwilling to...

Enjoy!

Lyle KK7P


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