Re: tcxo?


Dear Robin,

This is very interesting. The 5061A is a Caesium standard- I don’t think there is anything Rubidium in it. 

At Droitwich, I thought the first atomic frequency standard there was a Rubidium, or was this the Efratom units- as they did Rubidium?

Rubidium is, of course, not a primary standard; NPL used to publish the error in the Droitwich frequency each week. They don’t do this nowadays- I think because Droitwich uses a GPS locked standard, so there should be no error in average frequency.

Have I got this right?

There was an amusing incident last year, when I noted a considerable error in Droitwich frequency, which after observing for a few weeks I mentioned on another forum- error went to zero, a couple of days later.



Alwyn Seeds, Director
SynOptika Ltd.,
114 Beaufort Street,
SW3 6BU,

SynOptika Ltd., Registered in England and Wales: No. 04606737
Registered Office: 114 Beaufort Street, London, SW3 6BU, United Kingdom.

Join to automatically receive all group messages.