[hpsdr] GIBRALTAR with MERCURY or CASMIR

[Robert McGwier]

Lyle Johnson wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
>   
>> 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.
>   

Yes exactly. 
> 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.
>   

Ooops.  That was an oversight.  In order to do my phased array and 
coherent combining experiments,  I really need all clocks locked to the 
SAME source.


> I suggest considering similar flexibility in the CASMIR module.
>
> 73,
>
> Lyle KK7P
>
> _______________________________________________
>   
Bob


-- 
AMSAT VP Engineering. Member: ARRL, AMSAT-DL, TAPR, Packrats,
NJQRP/AMQRP, QRP ARCI, QCWA, FRC. ARRL SDR Wrk Grp Chairman
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