[hpsdr] Disabling 10 MHz clock on Penelope

[Bruce Beford]

> I do have the 10 MHz module power jumper removed on Mercury to disable
> the on board 10 MHz osc.  However, I have not seen that there is an
> equivalent jumper on Penelope to disconnect power the 10 MHz osc
> module similarly.
>

When using Excalibur as the 10 MHz clock source, one should disable the
corresponding oscillators on Mercury and Penelope.

It would appear that the TAPR production Penelope boards do -not- have a
0-Ohm resistor or SIP jumper to interrupt power to the on-board 10 MHz can.
Looking at the Penelope board, one can see a small trace leading from a
through-hole to pin 4 of the on-board 10 MHz oscillator. This trace could be
cut to disable the on-board clock. A jumper could be added across this gap,
to re-enable this oscillator, if ever desired in the future.

Does anyone see a problem with this method?

Bruce N1RX