Bert,
On 04/01/2012 07:50 PM, [email protected] wrote:
In the past I have asked if some one has any info of the Efratom M3100. I
have carefully dissected the unit and checked functionality. It sweeps but
does not lock. Lamp signal is strong 60 MHz and 5.xx all work properly and
can be seen on a spectrum analyzer The problem is in the loop and there is
not enough signal into the phase detector. Trying to follow the detector
output is challenging because lack of information and packaging density.
Typical loop frequency in a M100 is 127/254 in this case I see 85/160. I would
expect in a military application they would go up not down for vibration
purposes. Tracing the circuits is also made more difficult because of the use
of mil parts and mil nomenclature. I have most cross correlated and I am
down to one PMI part 38510/11201BCA. Does any one have any info, such a
nice unit, would like to make it work.
OK, does all the parts have operational power?
Does the modulation work?
Maybe it needs phase-trimming for best detection gain?
Can you hook up a scope so you have modulation sweep on X and detector
response at Y?
You should be able to probe around. I had some part success with a
similar rubidium, until I had reversed it to such a degree that I knew
that it was a power-supply in the thick-film module that had failed.
Cheers,
Magnus
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
