[time-nuts] Re: FTS1050A data

[Michael Garvey]

Have you looked at a phase plot?  You may learn a lot...
Mike

-----Original Message-----
From: Jim Schatzman via time-nuts <time-nuts at lists.febo.com> 
Sent: Friday, April 28, 2023 10:30 PM
To: time-nuts at lists.febo.com
Cc: Jim Schatzman <james.schatzman at futurelabusa.com>
Subject: [time-nuts] FTS1050A data

As I mentioned previously, in some 3-day tests one particular FTS1050A
(FTS1050AB7 in the plots) performs well (bottom curves) and in other tests
it performs somwhat poorly (upper curves). All the comparators in this MADEV
plot perform similarly, so there is no obvious reason why there is split
into good and bad cases. I have never before seen this behavior.

I will open up the case and do some power supply testing. Another suggestion
a reader made was that it could be a solder problem in the oscillator
assembly. The control circuits may also have a problem. I will pull out all
the PC boards, clean off the edge connector contacts, and reseat them.

Jim