[time-nuts] FRK-L Rubidium

Garren Davis garren.davis at qlogic.com
Fri Feb 8 19:12:22 EST 2013

Been lurking on the list for a while and finally started playing with a FRK-L  rubidium frequency standard. I've had
this thing for a while and decided to power it up and see what it would do. I do not get a lock. What I see is the
lamp voltage at 8.54 volts which I think is good but the xtal control voltage swings from 2 volts to 15 volts and back
to 2 volts and keeps cycling like that. I don't have a good frequency counter but I have a 3 Ghz 40 G/sample scope
and it shows that the 10 MHz signal is there. I just don't know how accurate it is. Has anyone seen a problem like
this? Can anyone point me to a place to start debugging this? I have the schematics and test tools. I am a test
engineer so I'm not afraid to poke around in the guts of this thing. Hopefully I can get this thing running. I also
have a thunderbolt that I'll get running this weekend. I don't know how deep I'll get into this time-nuts thing but
I have this nice scope and a Wavecrest sitting in my garage and I'd like to put them to use. Any help would be appreciated.



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