[hpsdr] Dual Mercury clock source?

[Phil Harman]

Hi David,

An alternative is to use the LVDS feature on each board to share one clock.

Mercury and Penelope have a connector on the top edge of the board that
enables an LVDS version of the 122.88MHz clock to be sent/received.

That way you can use one 122.88MHz clock and feed it to multiple boards
via a short twisted pair.

73 Phil...VK6APH





> ***** High Performance Software Defined Radio Discussion List *****
>
> My present setup includes a Mercury and Penelope. I modified Mercury to
> feed an external 10MHz reference directly onto the board (which I
> understand is used only to lock the on-board 122.88MHz osc). I jumper
> the 122.88MHz over to Penelope to clock it. I am now adding a 2nd
> Mercury to support diversity reception and plan to tie it into the same
> 122.88MHz output from my exisitng Mercury also (so both Mercury boards
> and Penelope will all share a single locked 122.88MHz osc). Anyone see a
> problem with this? I get the impression from recent mail that most users
> share a 10MHz reference but retain a 122.88MHz oscillator on each board
> (all locked to the same reference). My approach saved a few bucks by
> only requiring one 122.88MHz osc! Sorry for the long winded question,
> I've been absent for a while and just want to make sure I'm not missing
> anything?
>
> David
> KM5TZ
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