[time-nuts] EFOS2 Maser acting up :(

[cdelect at juno.com]

Forgot to mention that with the problem occurring, and at the same time I

observed the good  cavity output on the spec-A, feeding a signal from an
8660D
synthesizer into the LNA showed a zero IF level also. So it's downstream
from there.

Dana,

I have found that "watchful waiting" before jumping in to troubleshoot is

the BEST advice. This problem however after a week or so was not
correcting!
The EFOS2 Maser does not servo the IF level to the Hydrogen pressure. You

set the pressure you want and it does servo the Palladium leak to
maintain
that pressure. I do have a log of readings and when the problem is
occurring
they all (30 parameters) read nominal! This included the requested
Hydrogen 
pressure value and the measured Hydrogen pressure value.

Ole, Yes the 5.7Khz I.F. amplitude monitor. As I mentioned above feeding
in 
an external signal also gave a zero I.F. amplitude reading.

Of course now that I'm set up to monitor the L.O. it's not messing up!
A watched Maser never fails???

Cheers,

Corby