[hpsdr] GIBRALTAR with MERCURY or CASMIR

[Lyle Johnson]

> I'm thinking the LO should be generated onboard (based off the 1pps signal from GIBRALTAR)

I'm hoping Gibraltar is more than just a GPS receiver with a buffer, but 
will include a decent oscillator that is being disciplined by the GPS 
1PPS when the GPS signal is present.

Perhaps a 10 MHz plus one or two other frequencies.
These could be distributed on any of the Janus backplane bus signal lines.

For example, Janus has an oscillator on board, but if more than one 
Janus is installed on ATLAS, a user may wish to have them run from the 
same clock so they are synchronous.  There is no defined line for this 
purpose,  yet, but the CPLD in JANUS is connected to all potential bus 
lines to allow this.

I suggest considering similar flexibility in the CASMIR module.

73,

Lyle KK7P


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