FE-5680A Rubidium is alive. PPS pin seems to be ticking. No frequency out, but I have a tap on the DDS board which shows me 8.3889MHz I expect.
DDS queried with "S":
R=50255056.377900Hz F=2ABB503DE5CA8C00
OK
I think we can work with this,
LED I wired stays lit - albeit current has backed off. I believe it's up to temp, but searching for a lock. I recall this one did take some time to lock.
fOut tap is still wandering. I will wait some more time before commanding DDS to give me 10 on the dot.
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