[time-nuts] Stanford Research PRS-10

Magnus Danielson magnus at rubidium.dyndns.org
Sun Apr 22 00:09:22 UTC 2012


Fellow time-nuts,

On monday I picked up my PRS-10 and on friday I picked up the break-out 
board, PSU and manual. So, today I got around to put the pieces 
together, with no luck, as it did not lock.

After locating a serial cable and hooking up, I was able to start query 
the PRS-10, and got some hints to the fact that the RF oscillator was 
sitting in the extreme low of it's control voltage. Check around, I then 
looked at the SP? command to get the non-standard 65535,2190,23 reading, 
which when cross-checking with the Appendix A should read 3158,2190,23. 
A little moment after entering it, the rubidium locked up, jumped in 
frequency and felt happy. I then stored the new SP setting into the 
EEPROM using SP! and where able to verify that with the SP!?.

I wonder if this was an EEPROM error or someone fooling around error.

It ended up not delaying me all that much, but it could have confused me 
for much longer if I would have been less lucky.

Anyway, I wanted to share my experience.

Cheers,
Magnus




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