[hpsdr] Hermes jumper J24 for external ref socket

Phil Harman phil at pharman.org
Wed Nov 21 17:08:21 PST 2012


Hi Tokio,

If you insert J24 then the ground of your external clock will be connected
to the same ground that Hermes uses.

For most users this will be fine. We just allowed the option of not
forcing the two grounds to be connected in case the user wanted to keep
the two grounds separate.

73 Phil...VK6APH


> ***** High Performance Software Defined Radio Discussion List *****
>
> Hi All,
>
> Thanks to revised Hermes User User Manual, I'm preparing to house the
> board in my case and I'll use 10MHz external clock.
>
> In the manual, J24 is for 10MHz SMA socket outer to be grounded or not.
>
> Could anyone let me know what is the effect of the outer grounded or not?
>
> Tokio
> JA1CCA
> //Sent from iPhone
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